Bitcoin Wiki - User contributions [en]

Invoice address

2017-12-28T14:46:42Z

Rebroad: Undo revision 64613 by Fresheneesz (talk)

A '''Bitcoin address''', or simply '''address''', is an identifier of 26-35 alphanumeric characters, beginning with the number <code>1</code> or <code>3</code>, that represents a possible destination for a bitcoin payment.
Addresses can be generated at no cost by any user of Bitcoin.
For example, using [[Bitcoin Core]], one can click "New Address" and be assigned an address.
It is also possible to get a Bitcoin address using an account at an exchange or online wallet service.

There are currently two [[List_of_address_prefixes|address formats]] in common use:
# Common [[Transaction#Pay-to-PubkeyHash|P2PKH]] which begin with the number <code>1</code>, eg: <code>1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2</code>.
# Newer [[Pay_to_script_hash|P2SH]] type starting with the number <code>3</code>, eg: <code>3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy</code>.

==A Bitcoin address is a single-use token==
Like e-mail addresses, you can send bitcoins to a person by sending bitcoins to one of their addresses.
However, ''unlike'' e-mail addresses, people have many different Bitcoin addresses and a unique address should be used for each transaction.
Most Bitcoin software and websites will help with this by generating a brand new address each time you create an invoice or payment request.

==Addresses can be created offline==
Creating addresses can be done without an Internet connection and does not require any contact or registration with the Bitcoin network.
It is possible to create large batches of addresses offline using freely available software tools.
Generating batches of addresses is useful in several scenarios, such as e-commerce websites where a unique pre-generated address is dispensed to each customer who chooses a "pay with Bitcoin" option.
Newer [[Deterministic wallet | "HD wallets"]] can generate a "seed" token which can be used to allow untrusted systems (such as webservers) to generate an unlimited number of addresses without the ability to spend the bitcoins received.

==Addresses are case sensitive and exact==
Bitcoin addresses are case-sensitive. Bitcoin addresses should be copied and pasted using the computer's clipboard wherever possible. If you hand-key a Bitcoin address, and each character is not transcribed exactly - including capitalization - the incorrect address will most likely be rejected by the Bitcoin software. You will have to check your entry and try again.

The probability that a mistyped address is accepted as being valid is 1 in 232, that is, approximately 1 in 4.29 billion.

==Proving you receive with an address==
Most Bitcoin wallets have a function to "sign" a message, proving the entity receiving funds with an address has agreed to the message.
This can be used to, for example, finalise a contract in a cryptographically provable way prior to making payment for it.

Some services will also piggy-back on this capability by dedicating a specific address for authentication only, in which case the address should never be used for actual Bitcoin transactions.
When you login to or use their service, you will provide a signature proving you are the same person with the pre-negotiated address.

It is important to note that these signatures only prove one receives with an address.
Since Bitcoin transactions do not have a "from" address, you cannot prove you are the ''sender'' of funds.

Current standards for message signatures are only compatible with "version zero" bitcoin addresses (that begin with the number 1).

==Address validation==
If you would like to validate a Bitcoin address in an application, it is advisable to use a method from [https://bitcointalk.org/index.php?topic=1026.0 this thread] rather than to just check for string length, allowed characters, or that the address starts with a 1 or 3. Validation may also be done using open source code available in [http://rosettacode.org/wiki/Bitcoin/address_validation various languages] or with an [http://lenschulwitz.com/base58 online validating tool].

==[[Multisignature|Multi-signature]] addresses==
Addresses can be created that require a combination of multiple private keys.
Since these take advantage of newer features, they begin with the newer prefix of 3 instead of the older 1.
These can be thought of as the equivalent of writing a check to two parties - "pay to the order of somebody AND somebody else" - where both parties must endorse the check in order to receive the funds.

The actual requirement (number of private keys needed, their corresponding public keys, etc.) that must be satisfied to spend the funds is decided in advance by the person generating this type of address, and once an address is created, the requirement cannot be changed without generating a new address.

==What's in an address==
Most Bitcoin addresses are 34 characters.
They consist of random digits and uppercase and lowercase letters, with the exception that the uppercase letter "O", uppercase letter "I", lowercase letter "l", and the number "0" are never used to prevent visual ambiguity.

Some Bitcoin addresses can be shorter than 34 characters (as few as 26) and still be valid.
A significant percentage of Bitcoin addresses are only 33 characters, and some addresses may be even shorter.
Every Bitcoin address stands for a number.
These shorter addresses are valid simply because they stand for numbers that happen to start with zeroes, and when the zeroes are omitted, the encoded address gets shorter.

Several of the characters inside a Bitcoin address are used as a checksum so that typographical errors can be automatically found and rejected.
The checksum also allows Bitcoin software to confirm that a 33-character (or shorter) address is in fact valid and isn't simply an address with a missing character.

==Testnet==
Addresses on the Bitcoin Testnet are generated with a different address version, which results in a different prefix.
See [[List of address prefixes]] and [[Testnet]] for more details.

==Misconceptions==
===Address reuse===

Addresses are not intended to be used more than once, and doing so has numerous problems associated.
See the dedicated article on [[address reuse]] for more details.

===Address balances===

Addresses are not wallets nor accounts, and do not carry balances.
They only receive funds, and you do not send "from" an address at any time.
Various confusing services and software display ''bitcoins received with an address, minus bitcoins sent in random unrelated transactions'' as an "address balance", but this number is not meaningful: it does not imply the recipient of the bitcoins sent to the address has spent them, nor that they still have the bitcoins received.

An example of bitcoin loss resulting from this misunderstanding is when people believed their address contained 3btc. They spent 0.5btc and believed the address now contained 2.5btc when actually it contained zero. The remaining 2.5btc was transferred to a change address which was not backed up and therefore lost. This has happened on a few occasions to users of [[Paper wallets]].

==="From" addresses===
Bitcoin transactions do not have any kind of origin-, source- or "from" address. See the dedicated article on "[[From address|from address]]" for more details.

==See Also==
* [[Technical background of Bitcoin addresses]]
* [[List of address prefixes]]
* [[Exit Address]]

== References ==
<references/>

[[Category:Vocabulary]]

[[es:Dirección]]
[[de:Adresse]]

Invoice address

2017-12-28T14:46:13Z

Rebroad: Undo revision 64614 by Fresheneesz (talk)

A '''Bitcoin address''', or simply '''address''', is an identifier of 26-35 alphanumeric characters, beginning with the number <code>1</code> or <code>3</code>, that represents a possible destination for a bitcoin payment.
Addresses can be generated at no cost by any user of Bitcoin.
For example, using [[Bitcoin Core]], one can click "New Address" and be assigned an address.
It is also possible to get a Bitcoin address using an account at an exchange or online wallet service.

There are currently two [[List_of_address_prefixes|address formats]] in common use:
# Legacy [[Transaction#Pay-to-PubkeyHash|P2PKH]] which begin with the number <code>1</code>, eg: <code>1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2</code>.
# Older Segwit [[Pay_to_script_hash|P2SH]] type starting with the number <code>3</code>, eg: <code>3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy</code>.
# Newer Segwit [[Bech32]] type starting with the string <code>bc1</code>, eg: <code>bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4</code>

==A Bitcoin address is a single-use token==
Like e-mail addresses, you can send bitcoins to a person by sending bitcoins to one of their addresses.
However, ''unlike'' e-mail addresses, people have many different Bitcoin addresses and a unique address should be used for each transaction.
Most Bitcoin software and websites will help with this by generating a brand new address each time you create an invoice or payment request.

==Addresses can be created offline==
Creating addresses can be done without an Internet connection and does not require any contact or registration with the Bitcoin network.
It is possible to create large batches of addresses offline using freely available software tools.
Generating batches of addresses is useful in several scenarios, such as e-commerce websites where a unique pre-generated address is dispensed to each customer who chooses a "pay with Bitcoin" option.
Newer [[Deterministic wallet | "HD wallets"]] can generate a "seed" token which can be used to allow untrusted systems (such as webservers) to generate an unlimited number of addresses without the ability to spend the bitcoins received.

==Addresses are case sensitive and exact==
Bitcoin addresses are case-sensitive. Bitcoin addresses should be copied and pasted using the computer's clipboard wherever possible. If you hand-key a Bitcoin address, and each character is not transcribed exactly - including capitalization - the incorrect address will most likely be rejected by the Bitcoin software. You will have to check your entry and try again.

The probability that a mistyped address is accepted as being valid is 1 in 232, that is, approximately 1 in 4.29 billion.

==Proving you receive with an address==
Most Bitcoin wallets have a function to "sign" a message, proving the entity receiving funds with an address has agreed to the message.
This can be used to, for example, finalise a contract in a cryptographically provable way prior to making payment for it.

Some services will also piggy-back on this capability by dedicating a specific address for authentication only, in which case the address should never be used for actual Bitcoin transactions.
When you login to or use their service, you will provide a signature proving you are the same person with the pre-negotiated address.

It is important to note that these signatures only prove one receives with an address.
Since Bitcoin transactions do not have a "from" address, you cannot prove you are the ''sender'' of funds.

Current standards for message signatures are only compatible with "version zero" bitcoin addresses (that begin with the number 1).

==Address validation==
If you would like to validate a Bitcoin address in an application, it is advisable to use a method from [https://bitcointalk.org/index.php?topic=1026.0 this thread] rather than to just check for string length, allowed characters, or that the address starts with a 1 or 3. Validation may also be done using open source code available in [http://rosettacode.org/wiki/Bitcoin/address_validation various languages] or with an [http://lenschulwitz.com/base58 online validating tool].

==[[Multisignature|Multi-signature]] addresses==
Addresses can be created that require a combination of multiple private keys.
Since these take advantage of newer features, they begin with the newer prefix of 3 instead of the older 1.
These can be thought of as the equivalent of writing a check to two parties - "pay to the order of somebody AND somebody else" - where both parties must endorse the check in order to receive the funds.

The actual requirement (number of private keys needed, their corresponding public keys, etc.) that must be satisfied to spend the funds is decided in advance by the person generating this type of address, and once an address is created, the requirement cannot be changed without generating a new address.

==What's in an address==
Most Bitcoin addresses are 34 characters.
They consist of random digits and uppercase and lowercase letters, with the exception that the uppercase letter "O", uppercase letter "I", lowercase letter "l", and the number "0" are never used to prevent visual ambiguity.

Some Bitcoin addresses can be shorter than 34 characters (as few as 26) and still be valid.
A significant percentage of Bitcoin addresses are only 33 characters, and some addresses may be even shorter.
Every Bitcoin address stands for a number.
These shorter addresses are valid simply because they stand for numbers that happen to start with zeroes, and when the zeroes are omitted, the encoded address gets shorter.

Several of the characters inside a Bitcoin address are used as a checksum so that typographical errors can be automatically found and rejected.
The checksum also allows Bitcoin software to confirm that a 33-character (or shorter) address is in fact valid and isn't simply an address with a missing character.

==Testnet==
Addresses on the Bitcoin Testnet are generated with a different address version, which results in a different prefix.
See [[List of address prefixes]] and [[Testnet]] for more details.

==Misconceptions==
===Address reuse===

Addresses are not intended to be used more than once, and doing so has numerous problems associated.
See the dedicated article on [[address reuse]] for more details.

===Address balances===

Addresses are not wallets nor accounts, and do not carry balances.
They only receive funds, and you do not send "from" an address at any time.
Various confusing services and software display ''bitcoins received with an address, minus bitcoins sent in random unrelated transactions'' as an "address balance", but this number is not meaningful: it does not imply the recipient of the bitcoins sent to the address has spent them, nor that they still have the bitcoins received.

An example of bitcoin loss resulting from this misunderstanding is when people believed their address contained 3btc. They spent 0.5btc and believed the address now contained 2.5btc when actually it contained zero. The remaining 2.5btc was transferred to a change address which was not backed up and therefore lost. This has happened on a few occasions to users of [[Paper wallets]].

==="From" addresses===
Bitcoin transactions do not have any kind of origin-, source- or "from" address. See the dedicated article on "[[From address|from address]]" for more details.

==See Also==
* [[Technical background of Bitcoin addresses]]
* [[List of address prefixes]]
* [[Exit Address]]

== References ==
<references/>

[[Category:Vocabulary]]

[[es:Dirección]]
[[de:Adresse]]

Invoice address

2017-12-28T14:45:34Z

Rebroad: Undo revision 64654 by Rebroad (talk)

A '''Bitcoin address''', or simply '''address''', is an identifier of 26-35 alphanumeric characters, beginning with the number <code>1</code> or <code>3</code>, that represents a possible destination for a bitcoin payment.
Addresses can be generated at no cost by any user of Bitcoin.
For example, using [[Bitcoin Core]], one can click "New Address" and be assigned an address.
It is also possible to get a Bitcoin address using an account at an exchange or online wallet service.

There are currently two [[List_of_address_prefixes|address formats]] in common use:
# Legacy [[Transaction#Pay-to-PubkeyHash|P2PKH]] which begin with the number <code>1</code>, eg: <code>1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2</code>.
# Older Segwit [[Pay_to_script_hash|P2SH]] type starting with the number <code>3</code>, eg: <code>3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy</code>.
# Newer Segwit [[Bech32]] type starting with the string <code>bc1</code>, eg: <code>bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4</code>. Bech32 creates smaller transactions than P2SH addresses, among other things. As of December 2017, sending to a Bech32 address is still unsupported by a large minority of wallets, and so it is recommended that, if you need anyone to be able to send to you, to for now create wallets with P2SH addresses.

==A Bitcoin address is a single-use token==
Like e-mail addresses, you can send bitcoins to a person by sending bitcoins to one of their addresses.
However, ''unlike'' e-mail addresses, people have many different Bitcoin addresses and a unique address should be used for each transaction.
Most Bitcoin software and websites will help with this by generating a brand new address each time you create an invoice or payment request.

==Addresses can be created offline==
Creating addresses can be done without an Internet connection and does not require any contact or registration with the Bitcoin network.
It is possible to create large batches of addresses offline using freely available software tools.
Generating batches of addresses is useful in several scenarios, such as e-commerce websites where a unique pre-generated address is dispensed to each customer who chooses a "pay with Bitcoin" option.
Newer [[Deterministic wallet | "HD wallets"]] can generate a "seed" token which can be used to allow untrusted systems (such as webservers) to generate an unlimited number of addresses without the ability to spend the bitcoins received.

==Addresses are case sensitive and exact==
Bitcoin addresses are case-sensitive. Bitcoin addresses should be copied and pasted using the computer's clipboard wherever possible. If you hand-key a Bitcoin address, and each character is not transcribed exactly - including capitalization - the incorrect address will most likely be rejected by the Bitcoin software. You will have to check your entry and try again.

The probability that a mistyped address is accepted as being valid is 1 in 232, that is, approximately 1 in 4.29 billion.

==Proving you receive with an address==
Most Bitcoin wallets have a function to "sign" a message, proving the entity receiving funds with an address has agreed to the message.
This can be used to, for example, finalise a contract in a cryptographically provable way prior to making payment for it.

Some services will also piggy-back on this capability by dedicating a specific address for authentication only, in which case the address should never be used for actual Bitcoin transactions.
When you login to or use their service, you will provide a signature proving you are the same person with the pre-negotiated address.

It is important to note that these signatures only prove one receives with an address.
Since Bitcoin transactions do not have a "from" address, you cannot prove you are the ''sender'' of funds.

Current standards for message signatures are only compatible with "version zero" bitcoin addresses (that begin with the number 1).

==Address validation==
If you would like to validate a Bitcoin address in an application, it is advisable to use a method from [https://bitcointalk.org/index.php?topic=1026.0 this thread] rather than to just check for string length, allowed characters, or that the address starts with a 1 or 3. Validation may also be done using open source code available in [http://rosettacode.org/wiki/Bitcoin/address_validation various languages] or with an [http://lenschulwitz.com/base58 online validating tool].

==[[Multisignature|Multi-signature]] addresses==
Addresses can be created that require a combination of multiple private keys.
Since these take advantage of newer features, they begin with the newer prefix of 3 instead of the older 1.
These can be thought of as the equivalent of writing a check to two parties - "pay to the order of somebody AND somebody else" - where both parties must endorse the check in order to receive the funds.

The actual requirement (number of private keys needed, their corresponding public keys, etc.) that must be satisfied to spend the funds is decided in advance by the person generating this type of address, and once an address is created, the requirement cannot be changed without generating a new address.

==What's in an address==
Most Bitcoin addresses are 34 characters.
They consist of random digits and uppercase and lowercase letters, with the exception that the uppercase letter "O", uppercase letter "I", lowercase letter "l", and the number "0" are never used to prevent visual ambiguity.

Some Bitcoin addresses can be shorter than 34 characters (as few as 26) and still be valid.
A significant percentage of Bitcoin addresses are only 33 characters, and some addresses may be even shorter.
Every Bitcoin address stands for a number.
These shorter addresses are valid simply because they stand for numbers that happen to start with zeroes, and when the zeroes are omitted, the encoded address gets shorter.

Several of the characters inside a Bitcoin address are used as a checksum so that typographical errors can be automatically found and rejected.
The checksum also allows Bitcoin software to confirm that a 33-character (or shorter) address is in fact valid and isn't simply an address with a missing character.

==Testnet==
Addresses on the Bitcoin Testnet are generated with a different address version, which results in a different prefix.
See [[List of address prefixes]] and [[Testnet]] for more details.

==Misconceptions==
===Address reuse===

Addresses are not intended to be used more than once, and doing so has numerous problems associated.
See the dedicated article on [[address reuse]] for more details.

===Address balances===

Addresses are not wallets nor accounts, and do not carry balances.
They only receive funds, and you do not send "from" an address at any time.
Various confusing services and software display ''bitcoins received with an address, minus bitcoins sent in random unrelated transactions'' as an "address balance", but this number is not meaningful: it does not imply the recipient of the bitcoins sent to the address has spent them, nor that they still have the bitcoins received.

An example of bitcoin loss resulting from this misunderstanding is when people believed their address contained 3btc. They spent 0.5btc and believed the address now contained 2.5btc when actually it contained zero. The remaining 2.5btc was transferred to a change address which was not backed up and therefore lost. This has happened on a few occasions to users of [[Paper wallets]].

==="From" addresses===
Bitcoin transactions do not have any kind of origin-, source- or "from" address. See the dedicated article on "[[From address|from address]]" for more details.

==See Also==
* [[Technical background of Bitcoin addresses]]
* [[List of address prefixes]]
* [[Exit Address]]

== References ==
<references/>

[[Category:Vocabulary]]

[[es:Dirección]]
[[de:Adresse]]

Invoice address

2017-12-28T14:42:56Z

Rebroad:

A '''Bitcoin address''', or simply '''address''', is an identifier of 26-35 alphanumeric characters, beginning with the number <code>1</code> or <code>3</code>, that represents a possible destination for a bitcoin payment.
Addresses can be generated at no cost by any user of Bitcoin.
For example, using [[Bitcoin Core]], one can click "New Address" and be assigned an address.
It is also possible to get a Bitcoin address using an account at an exchange or online wallet service.

There are currently three [[List_of_address_prefixes|address formats]] in common use:
# Legacy [[Transaction#Pay-to-PubkeyHash|P2PKH]] which begin with the number <code>1</code>, eg: <code>1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2</code>.
# Older Segwit [[Pay_to_script_hash|P2SH]] type starting with the number <code>3</code>, eg: <code>3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy</code>.
# Newer Segwit [[Bech32]] type starting with the string <code>bc1</code>, eg: <code>bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4</code>. Bech32 creates smaller transactions than P2SH addresses, among other things. As of December 2017, sending to a Bech32 address is still unsupported by a large minority of wallets, and so it is recommended that, if you need anyone to be able to send to you, to for now create wallets with P2SH addresses.

==A Bitcoin address is a single-use token==
Like e-mail addresses, you can send bitcoins to a person by sending bitcoins to one of their addresses.
However, ''unlike'' e-mail addresses, people have many different Bitcoin addresses and a unique address should be used for each transaction.
Most Bitcoin software and websites will help with this by generating a brand new address each time you create an invoice or payment request.

==Addresses can be created offline==
Creating addresses can be done without an Internet connection and does not require any contact or registration with the Bitcoin network.
It is possible to create large batches of addresses offline using freely available software tools.
Generating batches of addresses is useful in several scenarios, such as e-commerce websites where a unique pre-generated address is dispensed to each customer who chooses a "pay with Bitcoin" option.
Newer [[Deterministic wallet | "HD wallets"]] can generate a "seed" token which can be used to allow untrusted systems (such as webservers) to generate an unlimited number of addresses without the ability to spend the bitcoins received.

==Addresses are case sensitive and exact==
Bitcoin addresses are case-sensitive. Bitcoin addresses should be copied and pasted using the computer's clipboard wherever possible. If you hand-key a Bitcoin address, and each character is not transcribed exactly - including capitalization - the incorrect address will most likely be rejected by the Bitcoin software. You will have to check your entry and try again.

The probability that a mistyped address is accepted as being valid is 1 in 232, that is, approximately 1 in 4.29 billion.

==Proving you receive with an address==
Most Bitcoin wallets have a function to "sign" a message, proving the entity receiving funds with an address has agreed to the message.
This can be used to, for example, finalise a contract in a cryptographically provable way prior to making payment for it.

Some services will also piggy-back on this capability by dedicating a specific address for authentication only, in which case the address should never be used for actual Bitcoin transactions.
When you login to or use their service, you will provide a signature proving you are the same person with the pre-negotiated address.

It is important to note that these signatures only prove one receives with an address.
Since Bitcoin transactions do not have a "from" address, you cannot prove you are the ''sender'' of funds.

Current standards for message signatures are only compatible with "version zero" bitcoin addresses (that begin with the number 1).

==Address validation==
If you would like to validate a Bitcoin address in an application, it is advisable to use a method from [https://bitcointalk.org/index.php?topic=1026.0 this thread] rather than to just check for string length, allowed characters, or that the address starts with a 1 or 3. Validation may also be done using open source code available in [http://rosettacode.org/wiki/Bitcoin/address_validation various languages] or with an [http://lenschulwitz.com/base58 online validating tool].

==[[Multisignature|Multi-signature]] addresses==
Addresses can be created that require a combination of multiple private keys.
Since these take advantage of newer features, they begin with the newer prefix of 3 instead of the older 1.
These can be thought of as the equivalent of writing a check to two parties - "pay to the order of somebody AND somebody else" - where both parties must endorse the check in order to receive the funds.

The actual requirement (number of private keys needed, their corresponding public keys, etc.) that must be satisfied to spend the funds is decided in advance by the person generating this type of address, and once an address is created, the requirement cannot be changed without generating a new address.

==What's in an address==
Most Bitcoin addresses are 34 characters.
They consist of random digits and uppercase and lowercase letters, with the exception that the uppercase letter "O", uppercase letter "I", lowercase letter "l", and the number "0" are never used to prevent visual ambiguity.

Some Bitcoin addresses can be shorter than 34 characters (as few as 26) and still be valid.
A significant percentage of Bitcoin addresses are only 33 characters, and some addresses may be even shorter.
Every Bitcoin address stands for a number.
These shorter addresses are valid simply because they stand for numbers that happen to start with zeroes, and when the zeroes are omitted, the encoded address gets shorter.

Several of the characters inside a Bitcoin address are used as a checksum so that typographical errors can be automatically found and rejected.
The checksum also allows Bitcoin software to confirm that a 33-character (or shorter) address is in fact valid and isn't simply an address with a missing character.

==Testnet==
Addresses on the Bitcoin Testnet are generated with a different address version, which results in a different prefix.
See [[List of address prefixes]] and [[Testnet]] for more details.

==Misconceptions==
===Address reuse===

Addresses are not intended to be used more than once, and doing so has numerous problems associated.
See the dedicated article on [[address reuse]] for more details.

===Address balances===

Addresses are not wallets nor accounts, and do not carry balances.
They only receive funds, and you do not send "from" an address at any time.
Various confusing services and software display ''bitcoins received with an address, minus bitcoins sent in random unrelated transactions'' as an "address balance", but this number is not meaningful: it does not imply the recipient of the bitcoins sent to the address has spent them, nor that they still have the bitcoins received.

An example of bitcoin loss resulting from this misunderstanding is when people believed their address contained 3btc. They spent 0.5btc and believed the address now contained 2.5btc when actually it contained zero. The remaining 2.5btc was transferred to a change address which was not backed up and therefore lost. This has happened on a few occasions to users of [[Paper wallets]].

==="From" addresses===
Bitcoin transactions do not have any kind of origin-, source- or "from" address. See the dedicated article on "[[From address|from address]]" for more details.

==See Also==
* [[Technical background of Bitcoin addresses]]
* [[List of address prefixes]]
* [[Exit Address]]

== References ==
<references/>

[[Category:Vocabulary]]

[[es:Dirección]]
[[de:Adresse]]

User talk:Gmaxwell/features

2017-10-22T09:50:22Z

Rebroad: Blanked the page

Segwit support

2017-07-24T19:50:10Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Kristofer "rawlzsec" Rawlins || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || {{No}} || {{No}} || {{AccJuly|AccJuly}} || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-24T19:48:47Z

Rebroad: /* Developers */

Segwit support

2017-07-24T19:32:00Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Kristofer "rawlzsec" Rawlins || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly|AccJuly}} || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-24T19:29:00Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Kristofer "rawlzsec" Rawlins || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{Weak}} || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

User talk:934

2017-07-23T21:37:21Z

Rebroad: Created page with "Why [https://en.bitcoin.it/w/index.php?title=Segwit_support&diff=prev&oldid=63595 hide]? --~~~~"

Why [https://en.bitcoin.it/w/index.php?title=Segwit_support&diff=prev&oldid=63595 hide]? --[[User:Rebroad|Rebroad]] ([[User talk:Rebroad|talk]]) 21:37, 23 July 2017 (UTC)

Segwit support

2017-07-23T09:04:20Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-23T09:01:43Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || || {{Acceptable}} || {{Weak}} || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-23T08:58:41Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || || {{Acceptable}} || || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-23T08:55:19Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Acceptable}} || || || || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-23T08:52:00Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Prefer}} || || || || {{No}} || {{Evaluating}}
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Segwit support

2017-07-23T08:45:27Z

Rebroad: /* Developers */

<big><big>'''PLEASE NOTE:''' This list is not yet complete.</big></big>

'''Developers/businesses: Please add a row for yourself in the applicable table to reflect your positions. If for some reason you don't already have a wiki account that can edit the page, make an account and ask luke-jr for help if you get caught in the anti-spam.'''

{| class="wikitable"
| {{No}} || doesn't support (but might or might not go along with it with sufficient community support)
|-
| {{Deficient}} || okay with the idea, but considers it to have insufficient community support
|-
| {{Evaluating}} || still evaluating the idea
|-
| {{AccJuly}} || it is a workable solution, provided it is activated before August 1 (and therefore BIP148-compatible)
|-
| {{Wanting}} || positively likes the idea, but considers it to have insufficient community support
|-
| {{Weak}} || better than nothing at all
|-
| {{Acceptable}} || it is a workable solution
|-
| {{Prefer}} || it is what he would choose if it was only up to him and no outside influences
|}

__TOC__

==Developers==



''Note that support for a given proposal does not mean developers support merging it into Core or any other specific codebase.''

{| class="wikitable sortable"
! rowspan=2 | Developer
! rowspan=2 | Aff* 
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Karl-Johan Alm || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Bryan Bishop || || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| ฿tcDrak || Core || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Andrew Chow || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Wang Chun || [[F2Pool]] || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{Acceptable}} || {{AccJuly}} ||
|-
| Matt Corallo || Core || {{Prefer}} || {{No}} || || {{Acceptable}} || {{No|LOL}} ||
|-
| Johnathan Corgan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Luke Dashjr || Core || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No}} || {{Deficient}}
|-
| Christian Decker || c-lightning || {{Prefer}} || {{Acceptable}} || || || ||
|-
| Nicolas Dorier || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{AccJuly}} || ||
|-
| Thaddeus Dryja || lit || {{Prefer}} || {{No}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-

| Mark Friedenbach || BIP 68/112 || {{Prefer}} || {{Prefer}} || {{No}} || {{AccJuly}} || {{No|LOL}} || {{No|Nope}}
|-
| Pavel Janik || Core || {{Prefer}} || {{No}} || {{Acceptable}} || {{No}} || {{No}} || {{No}}
|-
| Thomas Kerin || Core || {{Prefer}} || {{Wanting}} || {{Prefer}} || {{Weak}} || {{No}} || {{No}}
|-
| Johnson Lau || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || ||
|-
| Eric Lombrozo || || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Greg Maxwell || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Alex Morcos || Core || {{Prefer}} || {{Deficient}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| nopara73 || TumbleBit || {{Weak}} || {{Wanting}} || {{Prefer}} || || ||
|-
| Laolu "roasbeef" Osuntokun || lnd || {{Prefer}} || || || || {{No}} ||
|-
| Jeremy Rubin || Core || {{Prefer}} || {{Deficient}} || {{No}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Pavol "stick" Rusnak || [[TREZOR]] || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Rusty Russell || c-lightning || {{Prefer}} || {{Prefer}} || || || ||
|-
| Gregory Sanders || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Weak}} || {{No}} ||
|-
| Jonas Schnelli || Core || {{Prefer}} || {{Wanting}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Patrick Strateman || Core || {{Prefer}} || || || || {{No}} || {{No}}
|-
| Paul Sztorc || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No}} || {{No}}
|-
| Amir Taaki || libbtc || {{Acceptable}} || {{Prefer}} || || || {{No}} || {{No}}
|-
| Jorge Timon || Core || {{Prefer}} || {{No}} || {{Prefer}} || {{Deficient}} || {{No}} || {{No}}
|-
| Peter Todd || || {{Prefer}} || {{Deficient}} || {{Wanting}} || {{AccJuly}} || {{No|LOL}} ||
|-
| Warren Togami || Elements || {{Prefer}} || {{Prefer}} || {{Acceptable}} || || ||
|-
| Wladimir van der Laan || Core || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Thomas Voegtlin || Electrum || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Acceptable}} || {{No}} || {{No}}
|-
| Leo Wandersleb || Mycelium || {{Prefer}} || {{Prefer}} || {{Acceptable}} || {{Weak}} || {{No}} || {{No}}
|-
| Pieter Wuille || Core || {{Prefer}} || || || || {{No}} ||
|-
| Edmund Broadley || Core || {{Prefer}} || || || || {{No}} ||
|}

* "affiliation" is an optional field for the company or project the individual is associated with, that most qualifies the person to comment on the matter and is not meant as a company or project endorsement of the individual's position.

==Businesses==

'''When adding companies below, sources for each position MUST be provided.'''

{| class="wikitable sortable"
! rowspan=2 | Company
! rowspan=2 | Service
! Segwit itself
! colspan=3 | Deployment methods
! colspan=2 | Hardfork bundles (Silbert agreement)
|-
! [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP 141] !! [https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki BIP 148] !! [https://github.com/bitcoin/bips/blob/master/bip-0149.mediawiki BIP 149] !! [https://github.com/bitcoin/bips/blob/master/bip-0091.mediawiki BIP 91] || Segwit2x || [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014445.html COOP]
|-
| Abra || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitcoin India || exchange/miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| BitcoinReminder.com || service || {{Prefer}}<ref name="bitcoinreminder_com">[https://bitcoinreminder.com/informations/poli BitcoinReminder.com's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitcoinreminder_com"/> || {{Acceptable}}<ref name="bitcoinreminder_com"/> || {{Weak}}<ref name="bitcoinreminder_com"/> || {{No|LOL}}<ref name="bitcoinreminder_com"/> || {{No}}<ref name="bitcoinreminder_com"/>
|-
| Bitfinex || exchange || {{Acceptable}}<ref name="coindance" /> || {{Acceptable}} || || || ||
|-
| Bitfury || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}} || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Bitmain || miner || {{AccJuly}}<ref name="bitmain">[https://blog.bitmain.com/en/uahf-contingency-plan-uasf-bip148/ Bitmain's plot against BIP148]</ref> || {{No}} || || {{AccJuly}} || {{AccJuly}}<ref name="bitmain" /> ||
|-
| Bitonic/BL3P.eu || exchange || {{Prefer}}<ref name="bitonic">[https://bitonic.nl/en/news/138/our-position-on-scaling-proposals Bitonic's position on scaling proposals]</ref> || {{Prefer}}<ref name="bitonic"/> || {{Acceptable}}<ref name="bitonic"/> || {{Weak}}<ref name="bitonic"/> || {{No|LOL}}<ref name="bitonic"/> || {{No}}
|-
| Bitpay || wallet || {{Prefer}}<ref name="bccore_swadoption"/> || {{No}} || || {{Prefer}} || {{Prefer}}<ref name="silbert" /> ||
|-
| Bitrated || reputation || {{Acceptable}}<ref name="bitrated">[https://twitter.com/bitrated/status/876805892003553281]</ref> || {{Acceptable}}<ref name="bitrated" /> || {{Prefer}}<ref name="bitrated" /> || {{AccJuly}}<ref name="bitrated" /> || {{No}}<ref name="bitrated" /><ref>[https://medium.com/@shesek/why-i-dont-support-the-compromise-efforts-9d73a8cce6be Why I don’t support horse-trading compromises for Bitcoin protocol development]</ref> ||
|-
| Bitrefill || merchant || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Bitsquare || exchange || {{Prefer}} || {{Prefer}}<ref name="bitsquare">[https://forum.bitsquare.io/t/bitsquare-will-support-uasf-bitcoin-not-bitmaincoin/2265 Bitsquare will support UASF Bitcoin not BitMainCoin]</ref> || {{Acceptable}}<ref name="bitsquare"/> || || ||
|-
| Bitstamp || exchange || || || || || ||
|-
| Bittylicious || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref>[https://twitter.com/Bittylicious_/status/867305106668224513 Bittylicious answer on Twitter]</ref> || || || ||
|-
| Blockchain.info || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| blockonomics || || {{Prefer}} || {{Prefer}}<ref>[https://twitter.com/blockonomics_co/status/851738251509497856 blockonomics announcement on Twitter]</ref> || || || ||
|-
| Bustabit|| gambling || {{Prefer}}<ref name="bustabit">[https://www.bustabit.com/statement-on-forks Bustabit Statement on Bitcoin Forks]</ref> || {{Acceptable}}<ref name="bustabit"/> || || || {{AccJuly}}<ref name="bustabit"/> ||
|-
| Bylls || payments / exchange || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Prefer}}<ref name="bylls">[https://twitter.com/myBylls/status/877959773794316288 Bylls supports Segwit softfork but no current HF plan]</ref> || {{Acceptable}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{AccJuly}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref> || {{No}}<ref name="bylls">[https://twitter.com/myBylls/status/877965277316730880 Bylls twitter statement]</ref>
|-
| Ciphrex || wallet / dev stack || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| Coinbase || wallet || {{Acceptable}}<ref name="bccore_swadoption"/> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| CoinGate || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| CoinJar || wallet || || {{Evaluating}}<ref>[https://twitter.com/GetCoinJar/status/875581525730787329 CoinJar answer on Twitter]</ref> || || || ||
|-
| Coinkite || || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| coinomi || wallet || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| DigitalBitbox || wallet(hardware) || {{Prefer}} || {{Acceptable}} || {{Prefer}}|| || ||
|-
| Échange de Montréal || exchange || {{Prefer}}<ref name="echangedemontreal" /> || {{Prefer}}<ref name="echangedemontreal" /> || || ||
|-
| Jaxx || || {{Prefer}}<ref name="jaxx">[https://twitter.com/Jaxx_Support/status/882607648457334785 Jaxx tweet]</ref> || {{Acceptable}}<ref name="jaxx"/> || || {{AccJuly}}<ref name="jaxx"/> || {{AccJuly}}<ref name="jaxx"/> ||
|-
| Kraken || exchange || || || || || ||
|-
| LightningASIC || miner || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| OneHash || betting || {{Prefer}}<ref>[https://blog.onehash.com/sick-of-presidential-election-3f1a2defbbbf OneHash, "Sick of presidential election ?!"]</ref> || || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Poloniex || exchange || || || || || ||
|-
|QUOINE || exchange, trading, financial services || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" /> || {{Evaluating}}<ref name="coindance" />
|-
| SimpleFX || broker, financial services || {{Prefer}}<ref name="bccore_swadoption"/> || {{Prefer}}<ref name="bccore_swadoption"/> || || || ||
|-
| Slushpool || miner || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || || ||
|-
| TheRockTrading || exchange || || {{Evaluating}}<ref>[https://twitter.com/TheRockTrading/status/872464394034315269 @TheRockTrading message on Twitter]</ref> || || || ||
|-
| Vaultoro || exchange || {{Prefer}}<ref name="coindance" /> || {{Acceptable}}<ref name="coindance" /> || || {{AccJuly}} || {{AccJuly}}<ref name="silbert" /> ||
|-
| Walltime || exchange || {{Prefer}}<ref name="coindance" /> || {{Prefer}}<ref name="coindance" /> || || || ||
|-
| Woleet || Timestamping || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref> || {{Prefer}}<ref name="woleet">[https://twitter.com/Woleet/status/884078514307297280]</ref>|| || || ||
|-
| Xapo || wallet || {{Prefer}}<ref name="coindance" /> || || || {{AccJuly}}<ref name="xapo">[https://twitter.com/tedmrogers/status/883061218545614848 Xapo tweet]</ref> || {{AccJuly}}<ref name="xapo"/> ||
|-
|}

<references>
<ref name="bccore_swadoption">[https://bitcoincore.org/en/segwit_adoption/ Bitcoin Core's Segwit adoption list]</ref>
<ref name="coindance">[https://coin.dance/poli Coin Dance, "Global Bitcoin Political Support & Public Opinion"]</ref>
<ref name="silbert">[https://medium.com/@DCGco/bitcoin-scaling-agreement-at-consensus-2017-133521fe9a77 Digital Currency Group, "Bitcoin Scaling Agreement at Consensus 2017"]</ref>
<ref name="echangedemontreal">[https://twitter.com/echangedemtl/status/875781093261271040 Échange de Montréal on twitter]</ref>
</references>

Developers

2016-08-15T05:03:39Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| rebroad
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:57:52Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:56:42Z

Rebroad: correction

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:55:56Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:54:15Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:53:03Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:52:15Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:51:04Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:49:26Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:33:13Z

Rebroad:

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:31:59Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:30:53Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:28:50Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:27:38Z

Rebroad: some reordering based on current activity (of reference)

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Developers

2016-08-15T04:26:16Z

Rebroad: some reordering based on current activity

* '''This list is not complete.''' Please make updates/corrections as needed.
* Attempt to sort by contribution
* Legend:
** "Author" = original author; "Lead" = current project lead
{|
| style="background:#90ff90" | active maintainer
| style="background:#ffffaa" | has made contributions
| style="background:#ff9090" | no involvement
|}

{|
! Name !! Reference !! bitcoinj !! BFGMiner !! Tools !! Libbitcoin !! Gentoo !! Supybot !! Other
|-
| Satoshi Nakamoto
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Bitcoin original designer
|-
| Wladimir J. van der Laan
| {{Yes|Lead}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[User:Gavinandresen|Gavin Andresen]]
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sirius-m
|style="background:#ffffaa"|Retired
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| tcatm
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Jeff Garzik
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[pushpool]]
|-
| Diapolo
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pieter Wuille
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Cory Fields
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Corallo
| {{Table Value Yes}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| fanquake
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jonas Schnelli
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jorge Timón
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Gregory Maxwell
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| cozz
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Peter Todd
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mike Hearn
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Andreas Schildbach
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| devrandom
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Folkinshteyn
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
|-
| Luke Dashjr
| {{Table Value Yes}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value Yes}}
| {{Table Value Yes}}
|style="background:#90ff90"|URI, Wallet protocols, [[Eloipool]]
|-
| Amir Taaki
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|SX]], [[Libbitcoin_Server|Obelisk]]
|-
| Eric Voskuil
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Lead
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|[[Libbitcoin_Explorer|BX]], [[Libbitcoin_Server|BS]]
|-
| Phillip Mienk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| William Swanson
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Neill Miller
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Pablo Castellano
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Noel Maersk
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Strateman
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|Author
| {{Table Value No}}
| {{Table Value No}}
|-
| Kamil Domański
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| bobalot
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| drwasho
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| saracen
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Matt Giuca
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Con Kolivas
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Mizery De Aria
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#90ff90"|Author
| {{Table Value No}}
|-
| Laurent Bachelier
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Florian Schmaus
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| BioMike
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value Yes}}
| {{Table Value No}}
|-
| Chris Moore
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Marius Hanne
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| David FRANCOIS
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Nils Schneider
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Giel van Schijndel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Fabian H jr.
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ovdeathiam
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dev Random
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michal Zima
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Venkatesh Srinivas
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Vegard Nossum
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| JoelKatz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Joerie de Gram
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Johannes Henninger
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jeroenz0r
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Han Lin Yap
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Abraham Jewowich
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Michael Bemmerl
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Hosmer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dawid Spiechowicz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Stéphane Gimenez
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Patrick Varilly
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jay Weisskopf
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dylan Noblesmith
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| James Burkle
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jordan Lewis
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dean Lee
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| xHire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| HostFat
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jakob Kramer
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ariel
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| dabaopku
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Federico Faggiano
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| m0ray
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Danube
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlos Pizarro
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Blitzboom
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Daniel Holbert
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Jaromil
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
|-
| Carlo Alberto Ferraris
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Forrest Voight
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Amir Yalon
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| John Maguire
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Ricardo M. Correia
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Helfman
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| gjs278
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Dan Loewenherz
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Eric Swanson
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Santiago M. Mola
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Shane Wegner
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Sven Slootweg
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| ojab
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| sandos
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| Witchspace
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|-
| [[laszlo]]
|style="background:#ffffaa"|
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
| {{Table Value No}}
|}

==See Also==

* [https://bitcoin.org/en/development List of developers on bitcoin.org]
* [[Original client developers]]
* [[People]]

[[Category:Developer]]

Block

2015-05-17T05:46:38Z

Rebroad:

Data is permanently recorded in the Bitcoin network through files called '''blocks'''. A block is a record of some or all of the most recent Bitcoin [[transaction]]s that have not yet been recorded in any prior blocks. They could be thought of like the individual pages of a city recorder's recordbook (where changes to title to real estate are recorded) or a stock transaction ledger. New blocks are added to the end of the record (known as the [[block chain]]), and can never be changed or removed once written (although some software will remove them if they are orphaned). Each block memorializes what took place in the minutes before it was created.
===Block structure===
{| class="wikitable"
|-
! Field
! Description
! Size
|-
|Magic no
|value always 0xD9B4BEF9
|4 bytes
|-
|Blocksize
|number of bytes following up to end of block
|4 bytes
|-
|Blockheader
|[[Block hashing algorithm| consists of 6 items]]
|80 bytes
|-
|Transaction counter
| positive integer [[ Protocol_specification#Variable_length_integer|VI = VarInt]]
| 1 - 9 bytes
|-
|[[transactions]]
|the (non empty) list of transactions
|<Transaction counter>-many transactions
|}
==Description==
Each block contains, among other things, a record of some or all recent [[transactions]], and a reference to the block that came immediately before it. It also contains an answer to a difficult-to-solve mathematical puzzle - the answer to which is unique to each block. New blocks cannot be submitted to the network without the correct answer - the process of "[[mining]]" is essentially the process of competing to be the next to find the answer that "solves" the current block. The mathematical problem in each block is extremely [[difficulty|difficult]] to solve, but once a valid solution is found, it is very easy for the rest of the network to confirm that the solution is correct. There are multiple valid solutions for any given block - only one of the solutions needs to be found for the block to be solved.

Because there is a reward of brand new bitcoins for solving each block, every block also contains a record of which [[Bitcoin address]]es or [[script]]s are entitled to receive the reward. This record is known as a generation transaction, or a [[coinbase]] transaction, and is always the first transaction appearing in every block. The number of [[Bitcoins]] generated per block starts at 50 and is [[controlled supply|halved]] every 210,000 blocks (about four years).

Bitcoin transactions are [[transaction broadcasting|broadcast]] to the [[network]] by the sender, and all peers trying to solve blocks collect the transaction records and add them to the block they are working to solve. Miners get incentive to include transactions in their blocks because of attached transaction fees.

The [[difficulty]] of the mathematical problem is automatically adjusted by the network, such that it targets a goal of solving an average of 6 blocks per hour. Every 2016 blocks (solved in about two weeks), all Bitcoin clients compare the actual number created with this goal and modify the target by the percentage that it varied. The network comes to a consensus and automatically increases (or decreases) the difficulty of generating blocks.

Because each block contains a reference to the prior block, the collection of all blocks in existence can be said to form a chain. However, it's possible for the chain to have temporary splits - for example, if two miners arrive at two different valid solutions for the same block at the same time, unbeknownst to one another. The peer-to-peer network is designed to resolve these splits within a short period of time, so that only one branch of the chain survives.

The client accepts the 'longest' chain of blocks as valid. The 'length' of the entire [[block chain]] refers to the chain with the most combined difficulty, not the one with the most blocks. This prevents someone from forking the chain and creating a large number of low-difficulty blocks, and having it accepted by the network as 'longest'.

== Common Questions about Blocks ==

=== How many blocks are there? ===
[http://blockexplorer.com/q/getblockcount Current block count]

=== What is the maximum number of blocks? ===
There is no maximum number, blocks just keep getting added to the end of the chain at an average rate of one every 10 minutes.

==== Even when all 21 million coins have been generated? ====
Yes. The blocks are for proving that transactions existed at a particular time. Transactions will still occur once all the coins have been generated, so blocks will still be created as long as people are trading Bitcoins.

=== How long will it take me to generate a block? ===
No-one can say exactly. There is a [[Generation Calculator|generation calculator]] that will tell you how long it '''might''' take.

=== What if I'm 1% towards calculating a block and...? ===
There's no such thing as being 1% towards solving a block. You don't make progress towards solving it. After working on it for 24 hours, your chances of solving it are equal to what your chances were at the start or at any moment. Believing otherwise is what's known as the Gambler's fallacy [http://en.wikipedia.org/wiki/Gambler's_fallacy].

It's like trying to flip 53 coins at once and have them all come up heads. Each time you try, your chances of success are the same.

=== Where can I find more technical detail? ===
There is more technical detail on the [[block hashing algorithm]] page.

==See Also==

* [https://bitcointalk.org/index.php?topic=101514.0 Format of the BDB-style block files]

[[Category:Technical]]
[[Category:Vocabulary]]

[[fr:Blocs]][[pl:Bloki]][[zh-cn:Block]]
[[de:Block]]

Talk:Protocol documentation

2014-09-10T03:32:01Z

Rebroad: /* txn_count */ new section

= What is "77x"? Header size wrong? =
The description for the headers command says "77x?" as the size for the block_headers[] returned. However, the description of the block_header structure is 81 bytes (4+32+32+4+4+4+1). What exactly is returned by the headers command? -- [[User:AndyParkins|AndyParkins]]

= Version in getblocks? =
Apparently the official client sends the protocol version in getblocks messages, (possibly even in getheaders). This seems to me to be just weird --[[User:Bluecmd|Bluecmd]] 14:57, 6 June 2011 (GMT)

= Separate page for hexdumps? =

Does anyone else think it may be a good idea to put the hexdumps on a separate page? It'd be nice to have this page just describe the protocol, but at the same time, be able to have examples of each of the different messages and objects. On that node, would it also be helpful if I were to do a hexdump example of all of the different commands/structures? --[[User:Andrew12|Andrew12]] 23:26, 9 June 2011 (GMT)

:I think that a page devoted solely to hexdumps wouldn't be a bad idea, especially if there would be multiple variants per each example and some of them would be explained step-by-step. This page needs cleanup.
--[[User:ThePiachu|ThePiachu]] 14:06, 2 October 2011 (GMT)

= Proposing additional protocol messages =

According to the Bitcoin paper in order to do the simplified verification the client needs to store all headers of the entire chain but needs data only for those blocks that contain transactions of interest.

For this I propose the following new message types:

* '''setfilter''' this message contains a list of bitcoin addresses. After receiving this message on a connection the client will stop broadcasting any inv messages for transactions which don't have a matching address in its inputs or outputs. inv for new blocks will not be filtered.

* '''getblocksfiltered''' this message works exactly like getblocks but it will be answered with a filtered list of only those blocks that contain transactions with unspent outputs matching the filter list.

and the following new inventory type for getdata

* '''MSG_BLOCK_PRUNED''' this will be answered like a MSG_BLOCK but all transactions not matching the filter list and transactions that are already spent will be stripped from the block before transmitting it to the client.

When a client requests such filtering then all new blocks will still be advertised like normal but the client will have the opportunity to request only the absolute minimum necessary data to perform the simplified verification as outlined in the paper and new transactions will only be sent to it if they match the filter list. This should save a LOT of bandwidth.
[[User:Prof7bit|Prof7bit]] 21:03, 24 June 2011 (GMT)

== Errors? ==

https://en.bitcoin.it/wiki/Protocol_specification#version

Under version message there is the field version which has the type of int32_t. Shouldn't it be uint32_t? Same with the start_height.
--[[User:ThePiachu|ThePiachu]] 18:04, 30 September 2011 (GMT)

The modern example (protocol 60002) of the version message appears to have an incorrect checksum. When running the same data through a checksum I get 3B 64 8D 5A. Here's the output of the whole message in the same blocks as in the page:
<pre>
F9 BE B4 D9
76 65 72 73 69 6F 6E 00 00 00 00 00
64 00 00 00
3B 64 8D 5A
62 EA 00 00
01 00 00 00 00 00 00 00
11 B2 D0 50 00 00 00 00
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00
3B 2E B3 5D 8C E6 17 65
0F 2F 53 61 74 6F 73 68 69 3A 30 2E 37 2E 32 2F
C0 3E 03 00
</pre>
--[[User:Papercrane|papercrane]] 12:29, 7 February 2013 (PST)

https://en.bitcoin.it/wiki/Protocol_specification#Network_address

The hexdump of the network address doesn't seem to have the time field.
--[[User:ThePiachu|ThePiachu]] 18:04, 30 September 2011 (GMT)
:Are you looking at the network address in a version packet? Are you using an up-to-date Bitcoin client? --[[User:Atheros|Atheros]] 22:33, 2 October 2011 (GMT)

https://en.bitcoin.it/wiki/Protocol_specification#getblocks

Shouldn't the field size of block locator hashes be 32x? ?
--[[User:ThePiachu|ThePiachu]] 21:35, 1 October 2011 (GMT)

https://en.bitcoin.it/wiki/Protocol_specification#getheaders

Shouldn't the field size of hash_start be 32 ?
--[[User:ThePiachu|ThePiachu]] 21:35, 1 October 2011 (GMT)

https://en.bitcoin.it/wiki/Protocol_specification#headers

I think the Field Size of Block Headers is wrong (77x? rather than 81x?).
--[[User:ThePiachu|ThePiachu]] 18:45, 7 October 2011 (GMT)

== Missing? ==

The nonce in the version message is created when the local node is created, not when connection is established. I still have to confirm this in a real example before correcting it in the wiki.
[[User:Jdnavarro|Jdnavarro]] ([[User talk:Jdnavarro|talk]]) 16:15, 12 September 2012 (GMT)

It seems that the magic bytes for the testnet in version 0.7.0 is 0x0709110B. Am I missing something?
[[User:Jdnavarro|Jdnavarro]] ([[User talk:Jdnavarro|talk]]) 12:28, 23 September 2012 (GMT)

When a '''getdata''' message with multiple blocks is sent (i.e. initial block download), the remote node, after sending all the requested block messages, it sends an '''inv''' message with its top block.
[[User:Jdnavarro|Jdnavarro]] ([[User talk:Jdnavarro|talk]]) 16:08, 8 October 2012 (GMT)

The maximum size for a Block or a Transaction is 1MB. The overall message size is 32MB, which I think is deliberately redundant because it shouldn't be possible to generate a message of such size with the other limits. Should this be part of the protocol?
[[User:Jdnavarro|Jdnavarro]] ([[User talk:Jdnavarro|talk]]) 18:20, 15 October 2012 (GMT)

== txn_count ==

In [[Header#Block_Headers]], it says txn_count is always zero. Why is this? --[[User:Rebroad|Rebroad]] ([[User talk:Rebroad|talk]]) 03:32, 10 September 2014 (UTC)

Header

2014-09-06T10:18:08Z

Rebroad: Redirected page to Protocol specification#Block Headers

#redirect [[Protocol_specification#Block_Headers]]

Headers

2014-09-06T10:16:42Z

Rebroad: Redirected page to Protocol specification#headers

#redirect [[Protocol_specification#headers]]

Header

2014-09-06T10:15:55Z

Rebroad: Redirected page to Protocol specification#headers

#redirect [[Protocol_specification#headers]]

User talk:Luke-jr

2014-09-05T14:31:01Z

Rebroad: /* Headers */ new section

* My comments on [[Tonal Bitcoin]] are not "trolling". They are my opinions, and you can discuss it on the talk page based on the merits. If you delete my comments again from a discuss page, I will ask the administrators to ban your account. That is not acceptable wikipedia behavior [[User:Lunokhod|Lunokhod]] ([[User talk:Lunokhod|talk]])

== Thanks for helping on the [[Heaven Sent Gaming]] article. ==

The bias was sloppy copyediting on my part, thanks for fixing it. [[User:Anon y Mouse|Anon y Mouse]] ([[User talk:Anon y Mouse|talk]]) 10:55, 24 August 2014 (UTC)

== Headers ==

Hi Luke, can you restore the [[Headers]] article please? It was useful for finding information about headers, and it's not obvious where people need to go without this reference article. There's already an article for [[block]]s, so I don't see why you needed to delete this, since it was useful.

Talk:Header

2014-09-05T14:29:18Z

Rebroad: Created page with "This wasn't a useless stub. I found it useful!"

This wasn't a useless stub. I found it useful!

Protocol documentation

2014-09-04T16:47:08Z

Rebroad: /* getheaders */

Sources:
* [[Original Bitcoin client]] source

Type names used in this documentation are from the C99 standard.

For protocol used in mining, see [[getblocktemplate]].

==Common standards==

=== Hashes ===

Usually, when a hash is computed within bitcoin, it is computed twice. Most of the time [http://en.wikipedia.org/wiki/SHA-2 SHA-256] hashes are used, however [http://en.wikipedia.org/wiki/RIPEMD RIPEMD-160] is also used when a shorter hash is desirable (for example when creating a bitcoin address).

Example of double-SHA-256 encoding of string "hello":

hello
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 (first round of sha-256)
9595c9df90075148eb06860365df33584b75bff782a510c6cd4883a419833d50 (second round of sha-256)

For bitcoin addresses (RIPEMD-160) this would give:

hello
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 (first round is sha-256)
b6a9c8c230722b7c748331a8b450f05566dc7d0f (with ripemd-160)

=== Merkle Trees ===

Merkle trees are binary trees of hashes. Merkle trees in bitcoin use a '''double''' SHA-256, the SHA-256 hash of the SHA-256 hash of something.

If, when forming a row in the tree (other than the root of the tree), it would have an odd number of elements, the final double-hash is duplicated to ensure that the row has an even number of hashes.

First form the bottom row of the tree with the ordered double-SHA-256 hashes of the byte streams of the transactions in the block.

Then the row above it consists of half that number of hashes. Each entry is the double-SHA-256 of the 64-byte concatenation of the corresponding two hashes below it in the tree.

This procedure repeats recursively until we reach a row consisting of just a single double-hash. This is the '''Merkle root''' of the tree.

For example, imagine a block with three transactions ''a'', ''b'' and ''c''. The Merkle tree is:

d1 = dhash(a)
d2 = dhash(b)
d3 = dhash(c)
d4 = dhash(c) # a, b, c are 3. that's an odd number, so we take the c twice

d5 = dhash(d1 concat d2)
d6 = dhash(d3 concat d4)

d7 = dhash(d5 concat d6)

where

dhash(a) = sha256(sha256(a))

''d7'' is the Merkle root of the 3 transactions in this block.

Note: Hashes in Merkle Tree displayed in the [[Block Explorer]] are of little-endian notation. For some implementations and [http://www.fileformat.info/tool/hash.htm calculations], the bits need to be reversed before they are hashed, and again after the hashing operation.

=== Signatures ===

Bitcoin uses [http://en.wikipedia.org/wiki/Elliptic_curve_cryptography Elliptic Curve] [http://en.wikipedia.org/wiki/Digital_Signature_Algorithm Digital Signature Algorithm] ([http://en.wikipedia.org/wiki/Elliptic_Curve_DSA ECDSA]) to sign transactions.

For ECDSA the secp256k1 curve from http://www.secg.org/collateral/sec2_final.pdf is used.

Public keys (in scripts) are given as 04 <x> <y> where ''x'' and ''y'' are 32 byte big-endian integers representing the coordinates of a point on the curve or in compressed form given as <sign> <x> where <sign> is 0x02 if ''y'' is even and 0x03 if ''y'' is odd.

Signatures use [http://en.wikipedia.org/wiki/Distinguished_Encoding_Rules DER encoding] to pack the ''r'' and ''s'' components into a single byte stream (this is also what OpenSSL produces by default).

=== Transaction Verification ===
Transactions are cryptographically signed records that reassign ownership of Bitcoins to new addresses. Transactions have ''inputs'' - records which reference the funds from other previous transactions - and ''outputs'' - records which determine the new owner of the transferred Bitcoins, and which will be referenced as inputs in future transactions as those funds are respent.

Each ''input'' must have a cryptographic digital signature that unlocks the funds from the prior transaction. Only the person possessing the appropriate [[private key]] is able to create a satisfactory signature; this in effect ensures that funds can only be spent by their owners.

Each ''output'' determines which Bitcoin address (or other criteria, see [[Script]]) is the recipient of the funds.

In a transaction, the sum of all inputs must be equal to or greater than the sum of all outputs. If the inputs exceed the outputs, the difference is considered a [[transaction fee]], and is redeemable by whoever first includes the transaction into the block chain.

A special kind of transaction, called a [[coinbase transaction]], has no inputs. It is created by [[miners]], and there is one coinbase transaction per block. Because each block comes with a reward of newly created Bitcoins (e.g. 50 BTC for the first 210,000 blocks), the first transaction of a block is, with few exceptions, the transaction that grants those coins to their recipient (the miner). In addition to the newly created Bitcoins, the coinbase transaction is also used for assigning the recipient of any transaction fees that were paid within the other transactions being included in the same block. The coinbase transaction can assign the entire reward to a single Bitcoin address, or split it in portions among multiple addresses, just like any other transaction. Coinbase transactions always contain outputs totalling the sum of the block reward plus all transaction fees collected from the other transactions in the same block.

The [[coinbase transaction]] in block zero cannot be spent. This is due to a quirk of the reference client implementation that would open the potential for a block chain fork if some nodes accepted the spend and others did not<ref>[http://bitcointalk.org/index.php?topic=119645.msg1288552#msg1288552 Block 0 Network Fork]</ref>.

Most Bitcoin outputs encumber the newly transferred coins with a single ECDSA private key. The actual record saved with inputs and outputs isn't necessarily a key, but a ''script''. Bitcoin uses an interpreted scripting system to determine whether an output's criteria have been satisfied, with which more complex operations are possible, such as outputs that require two ECDSA signatures, or two-of-three-signature schemes. An output that references a single Bitcoin address is a ''typical'' output; an output actually contains this information in the form of a script that requires a single ECDSA signature (see [[OP_CHECKSIG]]). The output script specifies what must be provided to unlock the funds later, and when the time comes in the future to spend the transaction in another input, that input must provide all of the thing(s) that satisfy the requirements defined by the original output script.

=== Addresses ===

A bitcoin address is in fact the hash of a ECDSA public key, computed this way:

Version = 1 byte of 0 (zero); on the test network, this is 1 byte of 111
Key hash = Version concatenated with RIPEMD-160(SHA-256(public key))
Checksum = 1st 4 bytes of SHA-256(SHA-256(Key hash))
Bitcoin Address = Base58Encode(Key hash concatenated with Checksum)

The Base58 encoding used is home made, and has some differences. Especially, leading zeroes are kept as single zeroes when conversion happens.

== Common structures ==

Almost all integers are encoded in little endian. Only IP or port number are encoded big endian.

=== Message structure ===

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || magic || uint32_t || Magic value indicating message origin network, and used to seek to next message when stream state is unknown
|-
| 12 || command || char[12] || ASCII string identifying the packet content, NULL padded (non-NULL padding results in packet rejected)
|-
| 4 || length || uint32_t || Length of payload in number of bytes
|-
| 4 || checksum || uint32_t || First 4 bytes of sha256(sha256(payload))
|-
| ? || payload || uchar[] || The actual data
|}

Known magic values:

{|class="wikitable"
! Network !! Magic value !! Sent over wire as
|-
| main || 0xD9B4BEF9 || F9 BE B4 D9
|-
| testnet || 0xDAB5BFFA || FA BF B5 DA
|-
| testnet3 || 0x0709110B || 0B 11 09 07
|-
| namecoin || 0xFEB4BEF9 || F9 BE B4 FE
|}

=== Variable length integer ===

Integer can be encoded depending on the represented value to save space.
Variable length integers always precede an array/vector of a type of data that may vary in length.
Longer numbers are encoded in little endian.

{|class="wikitable"
! Value !! Storage length !! Format
|-
| < 0xfd || 1 || uint8_t
|-
| <= 0xffff || 3 || 0xfd followed by the length as uint16_t
|-
| <= 0xffffffff || 5 || 0xfe followed by the length as uint32_t
|-
| - || 9 || 0xff followed by the length as uint64_t
|}

If you're reading the Satoshi client code (BitcoinQT) it refers to this as a "CompactSize". Modern BitcoinQT has also CVarInt class which implements even more compact integer for the purpose of local storage (which is incompatible with "CompactSize" described here). CVarInt is not a part of the protocol.

=== Variable length string ===

Variable length string can be stored using a variable length integer followed by the string itself.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || length || [[Protocol_specification#Variable_length_integer|var_int]] || Length of the string
|-
| ? || string || char[] || The string itself (can be empty)
|}

=== Network address ===

When a network address is needed somewhere, this structure is used. Network addresses are not prefixed with a timestamp in the version message.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || time || uint32 || the Time (version >= 31402). '''Not present in version message.'''
|-
| 8 || services || uint64_t || same service(s) listed in [[#version|version]]
|-
| 16 || IPv6/4 || char[16] || IPv6 address. Network byte order. The original client only supported IPv4 and only read the last 4 bytes to get the IPv4 address. However, the IPv4 address is written into the message as a 16 byte [http://en.wikipedia.org/wiki/IPv6#IPv4-mapped_IPv6_addresses IPv4-mapped IPv6 address]
(12 bytes ''00 00 00 00 00 00 00 00 00 00 FF FF'', followed by the 4 bytes of the IPv4 address).
|-
| 2 || port || uint16_t || port number, network byte order
|}

Hexdump example of Network address structure

<pre>
0000 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0010 00 00 FF FF 0A 00 00 01 20 8D ........ .

Network address:
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK: see services listed under version command)
00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 - IPv6: ::ffff:a00:1 or IPv4: 10.0.0.1
20 8D - Port 8333
</pre>

=== Inventory Vectors ===

Inventory vectors are used for notifying other nodes about objects they have or data which is being requested.

Inventory vectors consist of the following data format:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || type || uint32_t || Identifies the object type linked to this inventory
|-
| 32 || hash || char[32] || Hash of the object
|}

The object type is currently defined as one of the following possibilities:

{|class="wikitable"
! Value !! Name !! Description
|-
| 0 || ERROR || Any data of with this number may be ignored
|-
| 1 || MSG_TX || Hash is related to a transaction
|-
| 2 || MSG_BLOCK || Hash is related to a data block
|}

Other Data Type values are considered reserved for future implementations.

=== Block Headers ===

Block headers are sent in a headers packet in response to a getheaders message.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Block version information, based upon the software version creating this block
|-
| 32 || prev_block || char[32] || The hash value of the previous block this particular block references
|-
| 32 || merkle_root || char[32] || The reference to a Merkle tree collection which is a hash of all transactions related to this block
|-
| 4 || timestamp || uint32_t || A timestamp recording when this block was created (Will overflow in 2106<ref>http://en.wikipedia.org/wiki/Unix_time#Notable.C2.A0events.C2.A0in.C2.A0Unix.C2.A0time</ref>)
|-
| 4 || bits || uint32_t || The calculated difficulty target being used for this block
|-
| 4 || nonce || uint32_t || The nonce used to generate this block… to allow variations of the header and compute different hashes
|-
| 1 || txn_count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of transaction entries, this value is always 0
|}

== Message types ==

=== version ===

When a node creates an outgoing connection, it will immediately [[Version Handshake|advertise]] its version. The remote node will respond with its version. No further communication is possible until both peers have exchanged their version.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || int32_t || Identifies protocol version being used by the node
|-
| 8 || services || uint64_t || bitfield of features to be enabled for this connection
|-
| 8 || timestamp || int64_t || standard UNIX timestamp in seconds
|-
| 26 || addr_recv || [[#Network address|net_addr]] || The network address of the node receiving this message
|-
|colspan="4"| version >= 106
|-
| 26 || addr_from || [[#Network address|net_addr]] || The network address of the node emitting this message
|-
| 8 || nonce || uint64_t || Node random nonce, randomly generated every time a version packet is sent. This nonce is used to detect connections to self.
|-
| ? || user_agent || [[#Variable length string|var_str]] || [https://github.com/bitcoin/bips/blob/master/bip-0014.mediawiki User Agent] (0x00 if string is 0 bytes long)
|-
| 4 || start_height || int32_t || The last block received by the emitting node
|-
| 1 || relay || bool || Whether the remote peer should announce relayed transactions or not, see [https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki BIP 0037], since version >= 70001
|}

A "verack" packet shall be sent if the version packet was accepted.

The following services are currently assigned:

{|class="wikitable"
! Value !! Name !! Description
|-
| 1 || NODE_NETWORK || This node can be asked for full blocks instead of just headers.
|}

Hexdump example of version message (OBSOLETE EXAMPLE. This example lacks a checksum and user-agent):
<pre>
0000 F9 BE B4 D9 76 65 72 73 69 6F 6E 00 00 00 00 00 ....version.....
0010 55 00 00 00 9C 7C 00 00 01 00 00 00 00 00 00 00 U....|..........
0020 E6 15 10 4D 00 00 00 00 01 00 00 00 00 00 00 00 ...M............
0030 00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 ................
0040 20 8D 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0050 00 00 00 00 FF FF 0A 00 00 02 20 8D DD 9D 20 2C .......... ... ,
0060 3A B4 57 13 00 55 81 01 00 :.W..U...

Message header:
F9 BE B4 D9 - Main network magic bytes
76 65 72 73 69 6F 6E 00 00 00 00 00 - "version" command
55 00 00 00 - Payload is 85 bytes long
- No checksum in version message until 20 February 2012. See https://bitcointalk.org/index.php?topic=55852.0
Version message:
9C 7C 00 00 - 31900 (version 0.3.19)
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK services)
E6 15 10 4D 00 00 00 00 - Mon Dec 20 21:50:14 EST 2010
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 20 8D - Recipient address info - see Network Address
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 02 20 8D - Sender address info - see Network Address
DD 9D 20 2C 3A B4 57 13 - Node random unique ID
00 - "" sub-version string (string is 0 bytes long)
55 81 01 00 - Last block sending node has is block #98645
</pre>

And here's a modern (60002) protocol version client advertising itself to a local peer...

Newer protocol includes the checksum now, this is from a mainline (satoshi) client during
an outgoing connection to another local client, notice that it does not fill out the
address information at all when the source or destination is "unroutable".

<pre>

0000 f9 be b4 d9 76 65 72 73 69 6f 6e 00 00 00 00 00 ....version.....
0010 64 00 00 00 35 8d 49 32 62 ea 00 00 01 00 00 00 d...5.I2b.......
0020 00 00 00 00 11 b2 d0 50 00 00 00 00 01 00 00 00 .......P........
0030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ................
0040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0050 00 00 00 00 00 00 00 00 ff ff 00 00 00 00 00 00 ................
0060 3b 2e b3 5d 8c e6 17 65 0f 2f 53 61 74 6f 73 68 ;..]...e./Satosh
0070 69 3a 30 2e 37 2e 32 2f c0 3e 03 00 i:0.7.2/.>..

Message Header:
F9 BE B4 D9 - Main network magic bytes
76 65 72 73 69 6F 6E 00 00 00 00 00 - "version" command
64 00 00 00 - Payload is 100 bytes long
3B 64 8D 5A - payload checksum

Version message:
62 EA 00 00 - 60002 (protocol version 60002)
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK services)
11 B2 D0 50 00 00 00 00 - Tue Dec 18 10:12:33 PST 2012
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 - Recipient address info - see Network Address
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 - Sender address info - see Network Address
3B 2E B3 5D 8C E6 17 65 - Node ID
0F 2F 53 61 74 6F 73 68 69 3A 30 2E 37 2E 32 2F - "/Satoshi:0.7.2/" sub-version string (string is 15 bytes long)
C0 3E 03 00 - Last block sending node has is block #212672
</pre>

=== verack ===

The ''verack'' message is sent in reply to ''[[#version|version]]''. This message consists of only a [[#Message structure|message header]] with the command string "verack".

Hexdump of the verack message:

<pre>
0000 F9 BE B4 D9 76 65 72 61 63 6B 00 00 00 00 00 00 ....verack......
0010 00 00 00 00 5D F6 E0 E2 ........

Message header:
F9 BE B4 D9 - Main network magic bytes
76 65 72 61 63 6B 00 00 00 00 00 00 - "verack" command
00 00 00 00 - Payload is 0 bytes long
5D F6 E0 E2 - Checksum
</pre>

=== addr ===

Provide information on known nodes of the network. Non-advertised nodes should be forgotten after typically 3 hours

Payload:
{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 1+ || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of address entries (max: 1000)
|-
| 30x? || addr_list || (uint32_t + [[#Network address|net_addr]])[] || Address of other nodes on the network. version < 209 will only read the first one. The uint32_t is a timestamp (see note below).
|}

'''Note''': Starting version 31402, addresses are prefixed with a timestamp. If no timestamp is present, the addresses should not be relayed to other peers, unless it is indeed confirmed they are up.

Hexdump example of ''addr'' message:
<pre>
0000 F9 BE B4 D9 61 64 64 72 00 00 00 00 00 00 00 00 ....addr........
0010 1F 00 00 00 ED 52 39 9B 01 E2 15 10 4D 01 00 00 .....R9.....M...
0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF ................
0030 FF 0A 00 00 01 20 8D ..... .

Message Header:
F9 BE B4 D9 - Main network magic bytes
61 64 64 72 00 00 00 00 00 00 00 00 - "addr"
1F 00 00 00 - payload is 31 bytes long
ED 52 39 9B - checksum of payload

Payload:
01 - 1 address in this message

Address:
E2 15 10 4D - Mon Dec 20 21:50:10 EST 2010 (only when version is >= 31402)
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK service - see version message)
00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 - IPv4: 10.0.0.1, IPv6: ::ffff:10.0.0.1 (IPv4-mapped IPv6 address)
20 8D - port 8333
</pre>

=== inv ===

Allows a node to advertise its knowledge of one or more objects. It can be received unsolicited, or in reply to ''getblocks''.

Payload (maximum payload length: 1.8 Megabytes or 50000 entries):

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of inventory entries
|-
| 36x? || inventory || [[Protocol specification#Inventory Vectors|inv_vect]][] || Inventory vectors
|}

=== getdata ===

getdata is used in response to inv, to retrieve the content of a specific object, and is usually sent after receiving an ''inv'' packet, after filtering known elements. It can be used to retrieve transactions, but only if they are in the memory pool or relay set - arbitrary access to transactions in the chain is not allowed to avoid having clients start to depend on nodes having full transaction indexes (which modern nodes do not).

Payload (maximum payload length: 1.8 Megabytes or 50000 entries):

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of inventory entries
|-
| 36x? || inventory || [[Protocol specification#Inventory Vectors|inv_vect]][] || Inventory vectors
|}

=== notfound ===

notfound is a response to a getdata, sent if any requested data items could not be relayed, for example, because the requested transaction was not in the memory pool or relay set.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of inventory entries
|-
| 36x? || inventory || [[Protocol specification#Inventory Vectors|inv_vect]][] || Inventory vectors
|}

=== getblocks ===

Return an ''inv'' packet containing the list of blocks starting right after the last known hash in the block locator object, up to hash_stop or 500 blocks, whichever comes first.

The locator hashes are processed by a node in the order as they appear in the message. If a block hash is found in the node's main chain, the list of its children is returned back via the ''inv'' message and the remaining locators are ignored, no matter if the requested limit was reached, or not.

To receive the next blocks hashes, one needs to issue getblocks again with a new block locator object. Keep in mind that some clients may provide blocks which are invalid if the block locator object contains a hash on the invalid branch.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || the protocol version
|-
| 1+ || hash count || [[Protocol_specification#Variable_length_integer|var_int]] || number of block locator hash entries
|-
| 32+ || block locator hashes || char[32] || block locator object; newest back to genesis block (dense to start, but then sparse)
|-
| 32 || hash_stop || char[32] || hash of the last desired block; set to zero to get as many blocks as possible (500)
|}

To create the block locator hashes, keep pushing hashes until you go back to the genesis block. After pushing 10 hashes back, the step backwards doubles every loop:

<pre>
// From libbitcoin which is under AGPL
std::vector<size_t> block_locator_indices(int top_depth)
{
// Start at max_depth
std::vector<size_t> indices;
// Push last 10 indices first
size_t step = 1, start = 0;
for (int i = top_depth; i > 0; i -= step, ++start)
{
if (start >= 10)
step *= 2;
indices.push_back(i);
}
indices.push_back(0);
return indices;
}
</pre>

Note that it is allowed to send in fewer known hashes down to a minimum of just one hash. However, the purpose of the block locator object is to detect a wrong branch in the caller's main chain. If the peer detects that you are off the main chain, it will send in block hashes which are earlier than your last known block. So if you just send in your last known hash and it is off the main chain, the peer starts over at block #1.

=== getheaders ===

Return a ''headers'' packet containing the headers of blocks starting right after the last known hash in the block locator object, up to hash_stop or 2000 blocks, whichever comes first. To receive the next block headers, one needs to issue getheaders again with a new block locator object. The ''getheaders'' command is used by thin clients to quickly download the block chain where the contents of the transactions would be irrelevant (because they are not ours). Keep in mind that some clients may provide headers of blocks which are invalid if the block locator object contains a hash on the invalid branch.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || the protocol version
|-
| 1+ || hash count || [[Protocol_specification#Variable_length_integer|var_int]] || number of block locator hash entries
|-
| 32+ || block locator hashes || char[32] || block locator object; newest back to genesis block (dense to start, but then sparse)
|-
| 32 || hash_stop || char[32] || hash of the last desired block header; set to zero to get as many blocks as possible (2000)
|}

For the block locator object in this packet, the same rules apply as for the [[Protocol_specification#getblocks|getblocks]] packet.

=== tx ===

''tx'' describes a bitcoin transaction, in reply to ''[[#getdata|getdata]]''

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Transaction data format version
|-
| 1+ || tx_in count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of Transaction inputs
|-
| 41+ || tx_in || tx_in[] || A list of 1 or more transaction inputs or sources for coins
|-
| 1+ || tx_out count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of Transaction outputs
|-
| 9+ || tx_out || tx_out[] || A list of 1 or more transaction outputs or destinations for coins
|-
| 4 || lock_time || uint32_t || The block number or timestamp at which this transaction is locked:
{|class="wikitable"
! Value !! Description
|-
| 0 || Always locked
|-
| < 500000000 || Block number at which this transaction is locked
|-
| >= 500000000 || UNIX timestamp at which this transaction is locked
|}
If all TxIn inputs have final (0xffffffff) sequence numbers then lock_time is irrelevant. Otherwise, the transaction may not be added to a block until after lock_time (see [[NLockTime]]).

|}

TxIn consists of the following fields:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 36 || previous_output || outpoint || The previous output transaction reference, as an OutPoint structure
|-
| 1+ || script length || [[Protocol_specification#Variable_length_integer|var_int]] || The length of the signature script
|-
| ? || signature script || uchar[] || Computational Script for confirming transaction authorization
|-
| 4 || [http://bitcoin.stackexchange.com/q/2025/323 sequence] || uint32_t || Transaction version as defined by the sender. Intended for "replacement" of transactions when information is updated before inclusion into a block.
|}

The OutPoint structure consists of the following fields:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 32 || hash || char[32] || The hash of the referenced transaction.
|-
| 4 || index || uint32_t || The index of the specific output in the transaction. The first output is 0, etc.
|}

The Script structure consists of a series of pieces of information and operations related to the value of the transaction.

(Structure to be expanded in the future… see script.h and script.cpp and [[Script]] for more information)

The TxOut structure consists of the following fields:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 8 || value || int64_t || Transaction Value
|-
| 1+ || pk_script length || [[Protocol_specification#Variable_length_integer|var_int]] || Length of the pk_script
|-
| ? || pk_script || uchar[] || Usually contains the public key as a Bitcoin script setting up conditions to claim this output.
|}

Example ''tx'' message:
<pre>
000000 F9 BE B4 D9 74 78 00 00 00 00 00 00 00 00 00 00 ....tx..........
000010 02 01 00 00 E2 93 CD BE 01 00 00 00 01 6D BD DB .............m..
000020 08 5B 1D 8A F7 51 84 F0 BC 01 FA D5 8D 12 66 E9 .[...Q........f.
000030 B6 3B 50 88 19 90 E4 B4 0D 6A EE 36 29 00 00 00 .;P......j.6)...
000040 00 8B 48 30 45 02 21 00 F3 58 1E 19 72 AE 8A C7 ..H0E.!..X..r...
000050 C7 36 7A 7A 25 3B C1 13 52 23 AD B9 A4 68 BB 3A .6zz%;..R#...h.:
000060 59 23 3F 45 BC 57 83 80 02 20 59 AF 01 CA 17 D0 Y#?E.W... Y.....
000070 0E 41 83 7A 1D 58 E9 7A A3 1B AE 58 4E DE C2 8D .A.z.X.z...XN...
000080 35 BD 96 92 36 90 91 3B AE 9A 01 41 04 9C 02 BF 5...6..;...A....
000090 C9 7E F2 36 CE 6D 8F E5 D9 40 13 C7 21 E9 15 98 .~.6.m...@..!...
0000A0 2A CD 2B 12 B6 5D 9B 7D 59 E2 0A 84 20 05 F8 FC *.+..].}Y... ...
0000B0 4E 02 53 2E 87 3D 37 B9 6F 09 D6 D4 51 1A DA 8F N.S..=7.o...Q...
0000C0 14 04 2F 46 61 4A 4C 70 C0 F1 4B EF F5 FF FF FF ../FaJLp..K.....
0000D0 FF 02 40 4B 4C 00 00 00 00 00 19 76 A9 14 1A A0 ..@KL......v....
0000E0 CD 1C BE A6 E7 45 8A 7A BA D5 12 A9 D9 EA 1A FB .....E.z........
0000F0 22 5E 88 AC 80 FA E9 C7 00 00 00 00 19 76 A9 14 "^...........v..
000100 0E AB 5B EA 43 6A 04 84 CF AB 12 48 5E FD A0 B7 ..[.Cj.....H^...
000110 8B 4E CC 52 88 AC 00 00 00 00 .N.R......

Message header:
F9 BE B4 D9 - main network magic bytes
74 78 00 00 00 00 00 00 00 00 00 00 - "tx" command
02 01 00 00 - payload is 258 bytes long
E2 93 CD BE - checksum of payload

Transaction:
01 00 00 00 - version

Inputs:
01 - number of transaction inputs

Input 1:
6D BD DB 08 5B 1D 8A F7 51 84 F0 BC 01 FA D5 8D - previous output (outpoint)
12 66 E9 B6 3B 50 88 19 90 E4 B4 0D 6A EE 36 29
00 00 00 00

8B - script is 139 bytes long

48 30 45 02 21 00 F3 58 1E 19 72 AE 8A C7 C7 36 - signature script (scriptSig)
7A 7A 25 3B C1 13 52 23 AD B9 A4 68 BB 3A 59 23
3F 45 BC 57 83 80 02 20 59 AF 01 CA 17 D0 0E 41
83 7A 1D 58 E9 7A A3 1B AE 58 4E DE C2 8D 35 BD
96 92 36 90 91 3B AE 9A 01 41 04 9C 02 BF C9 7E
F2 36 CE 6D 8F E5 D9 40 13 C7 21 E9 15 98 2A CD
2B 12 B6 5D 9B 7D 59 E2 0A 84 20 05 F8 FC 4E 02
53 2E 87 3D 37 B9 6F 09 D6 D4 51 1A DA 8F 14 04
2F 46 61 4A 4C 70 C0 F1 4B EF F5

FF FF FF FF - sequence

Outputs:
02 - 2 Output Transactions

Output 1:
40 4B 4C 00 00 00 00 00 - 0.05 BTC (5000000)
19 - pk_script is 25 bytes long

76 A9 14 1A A0 CD 1C BE A6 E7 45 8A 7A BA D5 12 - pk_script
A9 D9 EA 1A FB 22 5E 88 AC

Output 2:
80 FA E9 C7 00 00 00 00 - 33.54 BTC (3354000000)
19 - pk_script is 25 bytes long

76 A9 14 0E AB 5B EA 43 6A 04 84 CF AB 12 48 5E - pk_script
FD A0 B7 8B 4E CC 52 88 AC

Locktime:
00 00 00 00 - lock time
</pre>

=== block ===

The '''block''' message is sent in response to a getdata message which requests transaction information from a block hash.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Block version information, based upon the software version creating this block
|-
| 32 || prev_block || char[32] || The hash value of the previous block this particular block references
|-
| 32 || merkle_root || char[32] || The reference to a Merkle tree collection which is a hash of all transactions related to this block
|-
| 4 || timestamp || uint32_t || A Unix timestamp recording when this block was created (Currently limited to dates before the year 2106!)
|-
| 4 || bits || uint32_t || The calculated [[Difficulty|difficulty target]] being used for this block
|-
| 4 || nonce || uint32_t || The nonce used to generate this block… to allow variations of the header and compute different hashes
|-
| ? || txn_count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of transaction entries
|-
| ? || txns || tx[] || Block transactions, in format of "tx" command
|}

The SHA256 hash that identifies each block (and which must have a run of 0 bits) is calculated from the first 6 fields of this structure (version, prev_block, merkle_root, timestamp, bits, nonce, and standard SHA256 padding, making two 64-byte chunks in all) and ''not'' from the complete block. To calculate the hash, only two chunks need to be processed by the SHA256 algorithm. Since the ''nonce'' field is in the second chunk, the first chunk stays constant during mining and therefore only the second chunk needs to be processed. However, a Bitcoin hash is the hash of the hash, so two SHA256 rounds are needed for each mining iteration.
See [[Block hashing algorithm]] for details and an example.

=== headers ===

The ''headers'' packet returns block headers in response to a ''getheaders'' packet.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of block headers
|-
| 81x? || headers || [[Protocol_specification#Block_Headers|block_header]][] || [[Protocol_specification#Block_Headers|Block headers]]
|}

Note that the block headers in this packet include a transaction count (a var_int, so there can be more than 81 bytes per header) as opposed to the block headers which are sent to miners.

=== getaddr ===

The getaddr message sends a request to a node asking for information about known active peers to help with finding potential nodes in the network. The response to receiving this message is to transmit one or more addr messages with one or more peers from a database of known active peers. The typical presumption is that a node is likely to be active if it has been sending a message within the last three hours.

No additional data is transmitted with this message.

=== mempool ===

The mempool message sends a request to a node asking for information about transactions it has verified but which have not yet confirmed. The response to receiving this message is an inv message containing the transaction hashes for all the transactions in the node's mempool.

No additional data is transmitted with this message.

It is specified in [https://github.com/bitcoin/bips/blob/master/bip-0035.mediawiki BIP 35]. Since [https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki BIP 37], only transactions matching the filter are replied.

=== checkorder ===

This message was used for [[IP Transactions]]. As IP transactions have been deprecated, it is no longer used.

=== submitorder ===

This message was used for [[IP Transactions]]. As IP transactions have been deprecated, it is no longer used.

=== reply ===

This message was used for [[IP Transactions]]. As IP transactions have been deprecated, it is no longer used.

=== ping ===

The ''ping'' message is sent primarily to confirm that the TCP/IP connection is still valid. An error in transmission is presumed to be a closed connection and the address is removed as a current peer.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 8 || nonce || uint64_t || random nonce
|}

=== pong ===

The ''pong'' message is sent in response to a ''ping'' message. In modern protocol versions, a ''pong'' response is generated using a nonce included in the ping.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 8 || nonce || uint64_t || nonce from ping
|}

=== reject===

The ''reject'' message is sent when messages are rejected.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 1+ || message || var_str || type of message rejected
|-
| 1 || ccode || char || code relating to rejected message
|-
| 1+ || reason || var_str || text version of reason for rejection
|}

CCodes

{|class="wikitable"
! Value !! Name !! Description
|-
| 0x01 || REJECT_MALFORMED||
|-
| 0x10 || REJECT_INVALID ||
|-
| 0x11 || REJECT_OBSOLETE ||
|-
| 0x12 || REJECT_DUPLICATE ||
|-
| 0x40 || REJECT_NONSTANDARD ||
|-
| 0x41 || REJECT_DUST ||
|-
| 0x42 || REJECT_INSUFFICIENTFEE ||
|-
| 0x43 || REJECT_CHECKPOINT ||
|}

=== filterload, filteradd, filterclear, merkleblock ===

These messages are related to Bloom filtering of connections and are defined in [https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki BIP 0037].

The <code>filterload</code> command is defined as follows:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || filter || uint8_t[] || The filter itself is simply a bit field of arbitrary byte-aligned size. The maximum size is 36,000 bytes.
|-
| 4 || nHashFuncs || uint32_t || The number of hash functions to use in this filter. The maximum value allowed in this field is 50.
|-
| 4 || nTweak || uint32_t || A random value to add to the seed value in the hash function used by the bloom filter.
|-
| 1 || nFlags || uint8_t || A set of flags that control how matched items are added to the filter.
|}

See below for a description of the Bloom filter algorithm and how to select nHashFuncs and filter size for a desired false positive rate.

Upon receiving a <code>filterload</code> command, the remote peer will immediately restrict the broadcast transactions it announces (in inv packets) to transactions matching the filter, where the matching algorithm is specified below. The flags control the update behaviour of the matching algorithm.

The <code>filteradd</code> command is defined as follows:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || data || uint8_t[] || The data element to add to the current filter.
|}

The data field must be smaller than or equal to 520 bytes in size (the maximum size of any potentially matched object).

The given data element will be added to the Bloom filter. A filter must have been previously provided using <code>filterload</code>. This command is useful if a new key or script is added to a clients wallet whilst it has connections to the network open, it avoids the need to re-calculate and send an entirely new filter to every peer (though doing so is usually advisable to maintain anonymity).

The <code>filterclear</code> command has no arguments at all.

After a filter has been set, nodes don't merely stop announcing non-matching transactions, they can also serve filtered blocks. A filtered block is defined by the <code>merkleblock</code> message and is defined like this:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Block version information, based upon the software version creating this block
|-
| 32 || prev_block || char[32] || The hash value of the previous block this particular block references
|-
| 32 || merkle_root || char[32] || The reference to a Merkle tree collection which is a hash of all transactions related to this block
|-
| 4 || timestamp || uint32_t || A timestamp recording when this block was created (Limited to 2106!)
|-
| 4 || bits || uint32_t || The calculated difficulty target being used for this block
|-
| 4 || nonce || uint32_t || The nonce used to generate this block… to allow variations of the header and compute different hashes
|-
| 4 || total_transactions || uint32_t || Number of transactions in the block (including unmatched ones)
|-
| ? || hashes || uint256[] || hashes in depth-first order (including standard varint size prefix)
|-
| ? || flags || byte[] || flag bits, packed per 8 in a byte, least significant bit first (including standard varint size prefix)
|}

=== alert ===

An '''alert''' is sent between nodes to send a general notification message throughout the network. If the alert can be confirmed with the signature as having come from the the core development group of the Bitcoin software, the message is suggested to be displayed for end-users. Attempts to perform transactions, particularly automated transactions through the client, are suggested to be halted. The text in the Message string should be relayed to log files and any user interfaces.

Alert format:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || payload || uchar[] || Serialized alert payload
|-
| ? || signature || uchar[] || An ECDSA signature of the message
|}

The developers of Satoshi's client use this public key for signing alerts:
04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284
(hash) 1AGRxqDa5WjUKBwHB9XYEjmkv1ucoUUy1s

The payload is serialized into a uchar[] to ensure that versions using incompatible alert formats can still relay alerts among one another. The current alert payload format is:
{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || Version || int32_t || Alert format version
|-
| 8 || RelayUntil || int64_t || The timestamp beyond which nodes should stop relaying this alert
|-
| 8 || Expiration || int64_t || The timestamp beyond which this alert is no longer in effect and should be ignored
|-
| 4 || ID || int32_t || A unique ID number for this alert
|-
| 4 || Cancel || int32_t || All alerts with an ID number less than or equal to this number should be cancelled: deleted and not accepted in the future
|-
| ? || setCancel || set<int32_t> || All alert IDs contained in this set should be cancelled as above
|-
| 4 || MinVer || int32_t || This alert only applies to versions greater than or equal to this version. Other versions should still relay it.
|-
| 4 || MaxVer || int32_t || This alert only applies to versions less than or equal to this version. Other versions should still relay it.
|-
| ? || setSubVer || set<string> || If this set contains any elements, then only nodes that have their subVer contained in this set are affected by the alert. Other versions should still relay it.
|-
| 4 || Priority || int32_t || Relative priority compared to other alerts
|-
| ? || Comment || string || A comment on the alert that is not displayed
|-
| ? || StatusBar || string || The alert message that is displayed to the user
|-
| ? || Reserved || string || Reserved
|}

Note: '''set<''type''>''' in the table above is a [[#Variable length integer | variable length integer]] followed by the number of fields of the given ''type'' (either int32_t or [[#Variable length string | variable length string]])

Sample alert (no message header):
73010000003766404f00000000b305434f00000000f2030000f1030000001027000048ee0000
0064000000004653656520626974636f696e2e6f72672f666562323020696620796f75206861
76652074726f75626c6520636f6e6e656374696e672061667465722032302046656272756172
79004730450221008389df45f0703f39ec8c1cc42c13810ffcae14995bb648340219e353b63b
53eb022009ec65e1c1aaeec1fd334c6b684bde2b3f573060d5b70c3a46723326e4e8a4f1

Version: 1
RelayUntil: 1329620535
Expiration: 1329792435
ID: 1010
Cancel: 1009
setCancel: <empty>
MinVer: 10000
MaxVer: 61000
setSubVer: <empty>
Priority: 100
Comment: <empty>
StatusBar: "See bitcoin.org/feb20 if you have trouble connecting after 20 February"
Reserved: <empty>

== Scripting ==

See [[script]].

==See Also==

* [[Network]]
* [[Protocol rules]]
* [[Hardfork Wishlist]]
* [https://bitcoin.org/en/developer-documentation Developer Documentation on bitcoin.org]
* Bitcoin dissectors for Wireshark: https://github.com/lbotsch/wireshark-bitcoin https://github.com/op-sig/bitcoin-wireshark-dissector

==References==
<references />

[[zh-cn:协议说明]]
[[Category:Technical]]
[[Category:Developer]]

Protocol documentation

2014-09-04T16:45:37Z

Rebroad: /* getblocks */

Sources:
* [[Original Bitcoin client]] source

Type names used in this documentation are from the C99 standard.

For protocol used in mining, see [[getblocktemplate]].

==Common standards==

=== Hashes ===

Usually, when a hash is computed within bitcoin, it is computed twice. Most of the time [http://en.wikipedia.org/wiki/SHA-2 SHA-256] hashes are used, however [http://en.wikipedia.org/wiki/RIPEMD RIPEMD-160] is also used when a shorter hash is desirable (for example when creating a bitcoin address).

Example of double-SHA-256 encoding of string "hello":

hello
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 (first round of sha-256)
9595c9df90075148eb06860365df33584b75bff782a510c6cd4883a419833d50 (second round of sha-256)

For bitcoin addresses (RIPEMD-160) this would give:

hello
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 (first round is sha-256)
b6a9c8c230722b7c748331a8b450f05566dc7d0f (with ripemd-160)

=== Merkle Trees ===

Merkle trees are binary trees of hashes. Merkle trees in bitcoin use a '''double''' SHA-256, the SHA-256 hash of the SHA-256 hash of something.

If, when forming a row in the tree (other than the root of the tree), it would have an odd number of elements, the final double-hash is duplicated to ensure that the row has an even number of hashes.

First form the bottom row of the tree with the ordered double-SHA-256 hashes of the byte streams of the transactions in the block.

Then the row above it consists of half that number of hashes. Each entry is the double-SHA-256 of the 64-byte concatenation of the corresponding two hashes below it in the tree.

This procedure repeats recursively until we reach a row consisting of just a single double-hash. This is the '''Merkle root''' of the tree.

For example, imagine a block with three transactions ''a'', ''b'' and ''c''. The Merkle tree is:

d1 = dhash(a)
d2 = dhash(b)
d3 = dhash(c)
d4 = dhash(c) # a, b, c are 3. that's an odd number, so we take the c twice

d5 = dhash(d1 concat d2)
d6 = dhash(d3 concat d4)

d7 = dhash(d5 concat d6)

where

dhash(a) = sha256(sha256(a))

''d7'' is the Merkle root of the 3 transactions in this block.

Note: Hashes in Merkle Tree displayed in the [[Block Explorer]] are of little-endian notation. For some implementations and [http://www.fileformat.info/tool/hash.htm calculations], the bits need to be reversed before they are hashed, and again after the hashing operation.

=== Signatures ===

Bitcoin uses [http://en.wikipedia.org/wiki/Elliptic_curve_cryptography Elliptic Curve] [http://en.wikipedia.org/wiki/Digital_Signature_Algorithm Digital Signature Algorithm] ([http://en.wikipedia.org/wiki/Elliptic_Curve_DSA ECDSA]) to sign transactions.

For ECDSA the secp256k1 curve from http://www.secg.org/collateral/sec2_final.pdf is used.

Public keys (in scripts) are given as 04 <x> <y> where ''x'' and ''y'' are 32 byte big-endian integers representing the coordinates of a point on the curve or in compressed form given as <sign> <x> where <sign> is 0x02 if ''y'' is even and 0x03 if ''y'' is odd.

Signatures use [http://en.wikipedia.org/wiki/Distinguished_Encoding_Rules DER encoding] to pack the ''r'' and ''s'' components into a single byte stream (this is also what OpenSSL produces by default).

=== Transaction Verification ===
Transactions are cryptographically signed records that reassign ownership of Bitcoins to new addresses. Transactions have ''inputs'' - records which reference the funds from other previous transactions - and ''outputs'' - records which determine the new owner of the transferred Bitcoins, and which will be referenced as inputs in future transactions as those funds are respent.

Each ''input'' must have a cryptographic digital signature that unlocks the funds from the prior transaction. Only the person possessing the appropriate [[private key]] is able to create a satisfactory signature; this in effect ensures that funds can only be spent by their owners.

Each ''output'' determines which Bitcoin address (or other criteria, see [[Script]]) is the recipient of the funds.

In a transaction, the sum of all inputs must be equal to or greater than the sum of all outputs. If the inputs exceed the outputs, the difference is considered a [[transaction fee]], and is redeemable by whoever first includes the transaction into the block chain.

A special kind of transaction, called a [[coinbase transaction]], has no inputs. It is created by [[miners]], and there is one coinbase transaction per block. Because each block comes with a reward of newly created Bitcoins (e.g. 50 BTC for the first 210,000 blocks), the first transaction of a block is, with few exceptions, the transaction that grants those coins to their recipient (the miner). In addition to the newly created Bitcoins, the coinbase transaction is also used for assigning the recipient of any transaction fees that were paid within the other transactions being included in the same block. The coinbase transaction can assign the entire reward to a single Bitcoin address, or split it in portions among multiple addresses, just like any other transaction. Coinbase transactions always contain outputs totalling the sum of the block reward plus all transaction fees collected from the other transactions in the same block.

The [[coinbase transaction]] in block zero cannot be spent. This is due to a quirk of the reference client implementation that would open the potential for a block chain fork if some nodes accepted the spend and others did not<ref>[http://bitcointalk.org/index.php?topic=119645.msg1288552#msg1288552 Block 0 Network Fork]</ref>.

Most Bitcoin outputs encumber the newly transferred coins with a single ECDSA private key. The actual record saved with inputs and outputs isn't necessarily a key, but a ''script''. Bitcoin uses an interpreted scripting system to determine whether an output's criteria have been satisfied, with which more complex operations are possible, such as outputs that require two ECDSA signatures, or two-of-three-signature schemes. An output that references a single Bitcoin address is a ''typical'' output; an output actually contains this information in the form of a script that requires a single ECDSA signature (see [[OP_CHECKSIG]]). The output script specifies what must be provided to unlock the funds later, and when the time comes in the future to spend the transaction in another input, that input must provide all of the thing(s) that satisfy the requirements defined by the original output script.

=== Addresses ===

A bitcoin address is in fact the hash of a ECDSA public key, computed this way:

Version = 1 byte of 0 (zero); on the test network, this is 1 byte of 111
Key hash = Version concatenated with RIPEMD-160(SHA-256(public key))
Checksum = 1st 4 bytes of SHA-256(SHA-256(Key hash))
Bitcoin Address = Base58Encode(Key hash concatenated with Checksum)

The Base58 encoding used is home made, and has some differences. Especially, leading zeroes are kept as single zeroes when conversion happens.

== Common structures ==

Almost all integers are encoded in little endian. Only IP or port number are encoded big endian.

=== Message structure ===

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || magic || uint32_t || Magic value indicating message origin network, and used to seek to next message when stream state is unknown
|-
| 12 || command || char[12] || ASCII string identifying the packet content, NULL padded (non-NULL padding results in packet rejected)
|-
| 4 || length || uint32_t || Length of payload in number of bytes
|-
| 4 || checksum || uint32_t || First 4 bytes of sha256(sha256(payload))
|-
| ? || payload || uchar[] || The actual data
|}

Known magic values:

{|class="wikitable"
! Network !! Magic value !! Sent over wire as
|-
| main || 0xD9B4BEF9 || F9 BE B4 D9
|-
| testnet || 0xDAB5BFFA || FA BF B5 DA
|-
| testnet3 || 0x0709110B || 0B 11 09 07
|-
| namecoin || 0xFEB4BEF9 || F9 BE B4 FE
|}

=== Variable length integer ===

Integer can be encoded depending on the represented value to save space.
Variable length integers always precede an array/vector of a type of data that may vary in length.
Longer numbers are encoded in little endian.

{|class="wikitable"
! Value !! Storage length !! Format
|-
| < 0xfd || 1 || uint8_t
|-
| <= 0xffff || 3 || 0xfd followed by the length as uint16_t
|-
| <= 0xffffffff || 5 || 0xfe followed by the length as uint32_t
|-
| - || 9 || 0xff followed by the length as uint64_t
|}

If you're reading the Satoshi client code (BitcoinQT) it refers to this as a "CompactSize". Modern BitcoinQT has also CVarInt class which implements even more compact integer for the purpose of local storage (which is incompatible with "CompactSize" described here). CVarInt is not a part of the protocol.

=== Variable length string ===

Variable length string can be stored using a variable length integer followed by the string itself.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || length || [[Protocol_specification#Variable_length_integer|var_int]] || Length of the string
|-
| ? || string || char[] || The string itself (can be empty)
|}

=== Network address ===

When a network address is needed somewhere, this structure is used. Network addresses are not prefixed with a timestamp in the version message.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || time || uint32 || the Time (version >= 31402). '''Not present in version message.'''
|-
| 8 || services || uint64_t || same service(s) listed in [[#version|version]]
|-
| 16 || IPv6/4 || char[16] || IPv6 address. Network byte order. The original client only supported IPv4 and only read the last 4 bytes to get the IPv4 address. However, the IPv4 address is written into the message as a 16 byte [http://en.wikipedia.org/wiki/IPv6#IPv4-mapped_IPv6_addresses IPv4-mapped IPv6 address]
(12 bytes ''00 00 00 00 00 00 00 00 00 00 FF FF'', followed by the 4 bytes of the IPv4 address).
|-
| 2 || port || uint16_t || port number, network byte order
|}

Hexdump example of Network address structure

<pre>
0000 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0010 00 00 FF FF 0A 00 00 01 20 8D ........ .

Network address:
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK: see services listed under version command)
00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 - IPv6: ::ffff:a00:1 or IPv4: 10.0.0.1
20 8D - Port 8333
</pre>

=== Inventory Vectors ===

Inventory vectors are used for notifying other nodes about objects they have or data which is being requested.

Inventory vectors consist of the following data format:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || type || uint32_t || Identifies the object type linked to this inventory
|-
| 32 || hash || char[32] || Hash of the object
|}

The object type is currently defined as one of the following possibilities:

{|class="wikitable"
! Value !! Name !! Description
|-
| 0 || ERROR || Any data of with this number may be ignored
|-
| 1 || MSG_TX || Hash is related to a transaction
|-
| 2 || MSG_BLOCK || Hash is related to a data block
|}

Other Data Type values are considered reserved for future implementations.

=== Block Headers ===

Block headers are sent in a headers packet in response to a getheaders message.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Block version information, based upon the software version creating this block
|-
| 32 || prev_block || char[32] || The hash value of the previous block this particular block references
|-
| 32 || merkle_root || char[32] || The reference to a Merkle tree collection which is a hash of all transactions related to this block
|-
| 4 || timestamp || uint32_t || A timestamp recording when this block was created (Will overflow in 2106<ref>http://en.wikipedia.org/wiki/Unix_time#Notable.C2.A0events.C2.A0in.C2.A0Unix.C2.A0time</ref>)
|-
| 4 || bits || uint32_t || The calculated difficulty target being used for this block
|-
| 4 || nonce || uint32_t || The nonce used to generate this block… to allow variations of the header and compute different hashes
|-
| 1 || txn_count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of transaction entries, this value is always 0
|}

== Message types ==

=== version ===

When a node creates an outgoing connection, it will immediately [[Version Handshake|advertise]] its version. The remote node will respond with its version. No further communication is possible until both peers have exchanged their version.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || int32_t || Identifies protocol version being used by the node
|-
| 8 || services || uint64_t || bitfield of features to be enabled for this connection
|-
| 8 || timestamp || int64_t || standard UNIX timestamp in seconds
|-
| 26 || addr_recv || [[#Network address|net_addr]] || The network address of the node receiving this message
|-
|colspan="4"| version >= 106
|-
| 26 || addr_from || [[#Network address|net_addr]] || The network address of the node emitting this message
|-
| 8 || nonce || uint64_t || Node random nonce, randomly generated every time a version packet is sent. This nonce is used to detect connections to self.
|-
| ? || user_agent || [[#Variable length string|var_str]] || [https://github.com/bitcoin/bips/blob/master/bip-0014.mediawiki User Agent] (0x00 if string is 0 bytes long)
|-
| 4 || start_height || int32_t || The last block received by the emitting node
|-
| 1 || relay || bool || Whether the remote peer should announce relayed transactions or not, see [https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki BIP 0037], since version >= 70001
|}

A "verack" packet shall be sent if the version packet was accepted.

The following services are currently assigned:

{|class="wikitable"
! Value !! Name !! Description
|-
| 1 || NODE_NETWORK || This node can be asked for full blocks instead of just headers.
|}

Hexdump example of version message (OBSOLETE EXAMPLE. This example lacks a checksum and user-agent):
<pre>
0000 F9 BE B4 D9 76 65 72 73 69 6F 6E 00 00 00 00 00 ....version.....
0010 55 00 00 00 9C 7C 00 00 01 00 00 00 00 00 00 00 U....|..........
0020 E6 15 10 4D 00 00 00 00 01 00 00 00 00 00 00 00 ...M............
0030 00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 ................
0040 20 8D 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0050 00 00 00 00 FF FF 0A 00 00 02 20 8D DD 9D 20 2C .......... ... ,
0060 3A B4 57 13 00 55 81 01 00 :.W..U...

Message header:
F9 BE B4 D9 - Main network magic bytes
76 65 72 73 69 6F 6E 00 00 00 00 00 - "version" command
55 00 00 00 - Payload is 85 bytes long
- No checksum in version message until 20 February 2012. See https://bitcointalk.org/index.php?topic=55852.0
Version message:
9C 7C 00 00 - 31900 (version 0.3.19)
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK services)
E6 15 10 4D 00 00 00 00 - Mon Dec 20 21:50:14 EST 2010
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 20 8D - Recipient address info - see Network Address
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 02 20 8D - Sender address info - see Network Address
DD 9D 20 2C 3A B4 57 13 - Node random unique ID
00 - "" sub-version string (string is 0 bytes long)
55 81 01 00 - Last block sending node has is block #98645
</pre>

And here's a modern (60002) protocol version client advertising itself to a local peer...

Newer protocol includes the checksum now, this is from a mainline (satoshi) client during
an outgoing connection to another local client, notice that it does not fill out the
address information at all when the source or destination is "unroutable".

<pre>

0000 f9 be b4 d9 76 65 72 73 69 6f 6e 00 00 00 00 00 ....version.....
0010 64 00 00 00 35 8d 49 32 62 ea 00 00 01 00 00 00 d...5.I2b.......
0020 00 00 00 00 11 b2 d0 50 00 00 00 00 01 00 00 00 .......P........
0030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ................
0040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0050 00 00 00 00 00 00 00 00 ff ff 00 00 00 00 00 00 ................
0060 3b 2e b3 5d 8c e6 17 65 0f 2f 53 61 74 6f 73 68 ;..]...e./Satosh
0070 69 3a 30 2e 37 2e 32 2f c0 3e 03 00 i:0.7.2/.>..

Message Header:
F9 BE B4 D9 - Main network magic bytes
76 65 72 73 69 6F 6E 00 00 00 00 00 - "version" command
64 00 00 00 - Payload is 100 bytes long
3B 64 8D 5A - payload checksum

Version message:
62 EA 00 00 - 60002 (protocol version 60002)
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK services)
11 B2 D0 50 00 00 00 00 - Tue Dec 18 10:12:33 PST 2012
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 - Recipient address info - see Network Address
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 - Sender address info - see Network Address
3B 2E B3 5D 8C E6 17 65 - Node ID
0F 2F 53 61 74 6F 73 68 69 3A 30 2E 37 2E 32 2F - "/Satoshi:0.7.2/" sub-version string (string is 15 bytes long)
C0 3E 03 00 - Last block sending node has is block #212672
</pre>

=== verack ===

The ''verack'' message is sent in reply to ''[[#version|version]]''. This message consists of only a [[#Message structure|message header]] with the command string "verack".

Hexdump of the verack message:

<pre>
0000 F9 BE B4 D9 76 65 72 61 63 6B 00 00 00 00 00 00 ....verack......
0010 00 00 00 00 5D F6 E0 E2 ........

Message header:
F9 BE B4 D9 - Main network magic bytes
76 65 72 61 63 6B 00 00 00 00 00 00 - "verack" command
00 00 00 00 - Payload is 0 bytes long
5D F6 E0 E2 - Checksum
</pre>

=== addr ===

Provide information on known nodes of the network. Non-advertised nodes should be forgotten after typically 3 hours

Payload:
{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 1+ || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of address entries (max: 1000)
|-
| 30x? || addr_list || (uint32_t + [[#Network address|net_addr]])[] || Address of other nodes on the network. version < 209 will only read the first one. The uint32_t is a timestamp (see note below).
|}

'''Note''': Starting version 31402, addresses are prefixed with a timestamp. If no timestamp is present, the addresses should not be relayed to other peers, unless it is indeed confirmed they are up.

Hexdump example of ''addr'' message:
<pre>
0000 F9 BE B4 D9 61 64 64 72 00 00 00 00 00 00 00 00 ....addr........
0010 1F 00 00 00 ED 52 39 9B 01 E2 15 10 4D 01 00 00 .....R9.....M...
0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF ................
0030 FF 0A 00 00 01 20 8D ..... .

Message Header:
F9 BE B4 D9 - Main network magic bytes
61 64 64 72 00 00 00 00 00 00 00 00 - "addr"
1F 00 00 00 - payload is 31 bytes long
ED 52 39 9B - checksum of payload

Payload:
01 - 1 address in this message

Address:
E2 15 10 4D - Mon Dec 20 21:50:10 EST 2010 (only when version is >= 31402)
01 00 00 00 00 00 00 00 - 1 (NODE_NETWORK service - see version message)
00 00 00 00 00 00 00 00 00 00 FF FF 0A 00 00 01 - IPv4: 10.0.0.1, IPv6: ::ffff:10.0.0.1 (IPv4-mapped IPv6 address)
20 8D - port 8333
</pre>

=== inv ===

Allows a node to advertise its knowledge of one or more objects. It can be received unsolicited, or in reply to ''getblocks''.

Payload (maximum payload length: 1.8 Megabytes or 50000 entries):

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of inventory entries
|-
| 36x? || inventory || [[Protocol specification#Inventory Vectors|inv_vect]][] || Inventory vectors
|}

=== getdata ===

getdata is used in response to inv, to retrieve the content of a specific object, and is usually sent after receiving an ''inv'' packet, after filtering known elements. It can be used to retrieve transactions, but only if they are in the memory pool or relay set - arbitrary access to transactions in the chain is not allowed to avoid having clients start to depend on nodes having full transaction indexes (which modern nodes do not).

Payload (maximum payload length: 1.8 Megabytes or 50000 entries):

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of inventory entries
|-
| 36x? || inventory || [[Protocol specification#Inventory Vectors|inv_vect]][] || Inventory vectors
|}

=== notfound ===

notfound is a response to a getdata, sent if any requested data items could not be relayed, for example, because the requested transaction was not in the memory pool or relay set.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of inventory entries
|-
| 36x? || inventory || [[Protocol specification#Inventory Vectors|inv_vect]][] || Inventory vectors
|}

=== getblocks ===

Return an ''inv'' packet containing the list of blocks starting right after the last known hash in the block locator object, up to hash_stop or 500 blocks, whichever comes first.

The locator hashes are processed by a node in the order as they appear in the message. If a block hash is found in the node's main chain, the list of its children is returned back via the ''inv'' message and the remaining locators are ignored, no matter if the requested limit was reached, or not.

To receive the next blocks hashes, one needs to issue getblocks again with a new block locator object. Keep in mind that some clients may provide blocks which are invalid if the block locator object contains a hash on the invalid branch.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || the protocol version
|-
| 1+ || hash count || [[Protocol_specification#Variable_length_integer|var_int]] || number of block locator hash entries
|-
| 32+ || block locator hashes || char[32] || block locator object; newest back to genesis block (dense to start, but then sparse)
|-
| 32 || hash_stop || char[32] || hash of the last desired block; set to zero to get as many blocks as possible (500)
|}

To create the block locator hashes, keep pushing hashes until you go back to the genesis block. After pushing 10 hashes back, the step backwards doubles every loop:

<pre>
// From libbitcoin which is under AGPL
std::vector<size_t> block_locator_indices(int top_depth)
{
// Start at max_depth
std::vector<size_t> indices;
// Push last 10 indices first
size_t step = 1, start = 0;
for (int i = top_depth; i > 0; i -= step, ++start)
{
if (start >= 10)
step *= 2;
indices.push_back(i);
}
indices.push_back(0);
return indices;
}
</pre>

Note that it is allowed to send in fewer known hashes down to a minimum of just one hash. However, the purpose of the block locator object is to detect a wrong branch in the caller's main chain. If the peer detects that you are off the main chain, it will send in block hashes which are earlier than your last known block. So if you just send in your last known hash and it is off the main chain, the peer starts over at block #1.

=== getheaders ===

Return a ''headers'' packet containing the headers of blocks starting right after the last known hash in the block locator object, up to hash_stop or 2000 blocks, whichever comes first. To receive the next block headers, one needs to issue getheaders again with a new block locator object. The ''getheaders'' command is used by thin clients to quickly download the block chain where the contents of the transactions would be irrelevant (because they are not ours). Keep in mind that some clients (specifically the Satoshi client) will gladly provide headers of blocks which are invalid if the block locator object contains a hash on the invalid branch.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || the protocol version
|-
| 1+ || hash count || [[Protocol_specification#Variable_length_integer|var_int]] || number of block locator hash entries
|-
| 32+ || block locator hashes || char[32] || block locator object; newest back to genesis block (dense to start, but then sparse)
|-
| 32 || hash_stop || char[32] || hash of the last desired block header; set to zero to get as many blocks as possible (2000)
|}

For the block locator object in this packet, the same rules apply as for the [[Protocol_specification#getblocks|getblocks]] packet.

=== tx ===

''tx'' describes a bitcoin transaction, in reply to ''[[#getdata|getdata]]''

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Transaction data format version
|-
| 1+ || tx_in count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of Transaction inputs
|-
| 41+ || tx_in || tx_in[] || A list of 1 or more transaction inputs or sources for coins
|-
| 1+ || tx_out count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of Transaction outputs
|-
| 9+ || tx_out || tx_out[] || A list of 1 or more transaction outputs or destinations for coins
|-
| 4 || lock_time || uint32_t || The block number or timestamp at which this transaction is locked:
{|class="wikitable"
! Value !! Description
|-
| 0 || Always locked
|-
| < 500000000 || Block number at which this transaction is locked
|-
| >= 500000000 || UNIX timestamp at which this transaction is locked
|}
If all TxIn inputs have final (0xffffffff) sequence numbers then lock_time is irrelevant. Otherwise, the transaction may not be added to a block until after lock_time (see [[NLockTime]]).

|}

TxIn consists of the following fields:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 36 || previous_output || outpoint || The previous output transaction reference, as an OutPoint structure
|-
| 1+ || script length || [[Protocol_specification#Variable_length_integer|var_int]] || The length of the signature script
|-
| ? || signature script || uchar[] || Computational Script for confirming transaction authorization
|-
| 4 || [http://bitcoin.stackexchange.com/q/2025/323 sequence] || uint32_t || Transaction version as defined by the sender. Intended for "replacement" of transactions when information is updated before inclusion into a block.
|}

The OutPoint structure consists of the following fields:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 32 || hash || char[32] || The hash of the referenced transaction.
|-
| 4 || index || uint32_t || The index of the specific output in the transaction. The first output is 0, etc.
|}

The Script structure consists of a series of pieces of information and operations related to the value of the transaction.

(Structure to be expanded in the future… see script.h and script.cpp and [[Script]] for more information)

The TxOut structure consists of the following fields:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 8 || value || int64_t || Transaction Value
|-
| 1+ || pk_script length || [[Protocol_specification#Variable_length_integer|var_int]] || Length of the pk_script
|-
| ? || pk_script || uchar[] || Usually contains the public key as a Bitcoin script setting up conditions to claim this output.
|}

Example ''tx'' message:
<pre>
000000 F9 BE B4 D9 74 78 00 00 00 00 00 00 00 00 00 00 ....tx..........
000010 02 01 00 00 E2 93 CD BE 01 00 00 00 01 6D BD DB .............m..
000020 08 5B 1D 8A F7 51 84 F0 BC 01 FA D5 8D 12 66 E9 .[...Q........f.
000030 B6 3B 50 88 19 90 E4 B4 0D 6A EE 36 29 00 00 00 .;P......j.6)...
000040 00 8B 48 30 45 02 21 00 F3 58 1E 19 72 AE 8A C7 ..H0E.!..X..r...
000050 C7 36 7A 7A 25 3B C1 13 52 23 AD B9 A4 68 BB 3A .6zz%;..R#...h.:
000060 59 23 3F 45 BC 57 83 80 02 20 59 AF 01 CA 17 D0 Y#?E.W... Y.....
000070 0E 41 83 7A 1D 58 E9 7A A3 1B AE 58 4E DE C2 8D .A.z.X.z...XN...
000080 35 BD 96 92 36 90 91 3B AE 9A 01 41 04 9C 02 BF 5...6..;...A....
000090 C9 7E F2 36 CE 6D 8F E5 D9 40 13 C7 21 E9 15 98 .~.6.m...@..!...
0000A0 2A CD 2B 12 B6 5D 9B 7D 59 E2 0A 84 20 05 F8 FC *.+..].}Y... ...
0000B0 4E 02 53 2E 87 3D 37 B9 6F 09 D6 D4 51 1A DA 8F N.S..=7.o...Q...
0000C0 14 04 2F 46 61 4A 4C 70 C0 F1 4B EF F5 FF FF FF ../FaJLp..K.....
0000D0 FF 02 40 4B 4C 00 00 00 00 00 19 76 A9 14 1A A0 ..@KL......v....
0000E0 CD 1C BE A6 E7 45 8A 7A BA D5 12 A9 D9 EA 1A FB .....E.z........
0000F0 22 5E 88 AC 80 FA E9 C7 00 00 00 00 19 76 A9 14 "^...........v..
000100 0E AB 5B EA 43 6A 04 84 CF AB 12 48 5E FD A0 B7 ..[.Cj.....H^...
000110 8B 4E CC 52 88 AC 00 00 00 00 .N.R......

Message header:
F9 BE B4 D9 - main network magic bytes
74 78 00 00 00 00 00 00 00 00 00 00 - "tx" command
02 01 00 00 - payload is 258 bytes long
E2 93 CD BE - checksum of payload

Transaction:
01 00 00 00 - version

Inputs:
01 - number of transaction inputs

Input 1:
6D BD DB 08 5B 1D 8A F7 51 84 F0 BC 01 FA D5 8D - previous output (outpoint)
12 66 E9 B6 3B 50 88 19 90 E4 B4 0D 6A EE 36 29
00 00 00 00

8B - script is 139 bytes long

48 30 45 02 21 00 F3 58 1E 19 72 AE 8A C7 C7 36 - signature script (scriptSig)
7A 7A 25 3B C1 13 52 23 AD B9 A4 68 BB 3A 59 23
3F 45 BC 57 83 80 02 20 59 AF 01 CA 17 D0 0E 41
83 7A 1D 58 E9 7A A3 1B AE 58 4E DE C2 8D 35 BD
96 92 36 90 91 3B AE 9A 01 41 04 9C 02 BF C9 7E
F2 36 CE 6D 8F E5 D9 40 13 C7 21 E9 15 98 2A CD
2B 12 B6 5D 9B 7D 59 E2 0A 84 20 05 F8 FC 4E 02
53 2E 87 3D 37 B9 6F 09 D6 D4 51 1A DA 8F 14 04
2F 46 61 4A 4C 70 C0 F1 4B EF F5

FF FF FF FF - sequence

Outputs:
02 - 2 Output Transactions

Output 1:
40 4B 4C 00 00 00 00 00 - 0.05 BTC (5000000)
19 - pk_script is 25 bytes long

76 A9 14 1A A0 CD 1C BE A6 E7 45 8A 7A BA D5 12 - pk_script
A9 D9 EA 1A FB 22 5E 88 AC

Output 2:
80 FA E9 C7 00 00 00 00 - 33.54 BTC (3354000000)
19 - pk_script is 25 bytes long

76 A9 14 0E AB 5B EA 43 6A 04 84 CF AB 12 48 5E - pk_script
FD A0 B7 8B 4E CC 52 88 AC

Locktime:
00 00 00 00 - lock time
</pre>

=== block ===

The '''block''' message is sent in response to a getdata message which requests transaction information from a block hash.

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Block version information, based upon the software version creating this block
|-
| 32 || prev_block || char[32] || The hash value of the previous block this particular block references
|-
| 32 || merkle_root || char[32] || The reference to a Merkle tree collection which is a hash of all transactions related to this block
|-
| 4 || timestamp || uint32_t || A Unix timestamp recording when this block was created (Currently limited to dates before the year 2106!)
|-
| 4 || bits || uint32_t || The calculated [[Difficulty|difficulty target]] being used for this block
|-
| 4 || nonce || uint32_t || The nonce used to generate this block… to allow variations of the header and compute different hashes
|-
| ? || txn_count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of transaction entries
|-
| ? || txns || tx[] || Block transactions, in format of "tx" command
|}

The SHA256 hash that identifies each block (and which must have a run of 0 bits) is calculated from the first 6 fields of this structure (version, prev_block, merkle_root, timestamp, bits, nonce, and standard SHA256 padding, making two 64-byte chunks in all) and ''not'' from the complete block. To calculate the hash, only two chunks need to be processed by the SHA256 algorithm. Since the ''nonce'' field is in the second chunk, the first chunk stays constant during mining and therefore only the second chunk needs to be processed. However, a Bitcoin hash is the hash of the hash, so two SHA256 rounds are needed for each mining iteration.
See [[Block hashing algorithm]] for details and an example.

=== headers ===

The ''headers'' packet returns block headers in response to a ''getheaders'' packet.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || count || [[Protocol_specification#Variable_length_integer|var_int]] || Number of block headers
|-
| 81x? || headers || [[Protocol_specification#Block_Headers|block_header]][] || [[Protocol_specification#Block_Headers|Block headers]]
|}

Note that the block headers in this packet include a transaction count (a var_int, so there can be more than 81 bytes per header) as opposed to the block headers which are sent to miners.

=== getaddr ===

The getaddr message sends a request to a node asking for information about known active peers to help with finding potential nodes in the network. The response to receiving this message is to transmit one or more addr messages with one or more peers from a database of known active peers. The typical presumption is that a node is likely to be active if it has been sending a message within the last three hours.

No additional data is transmitted with this message.

=== mempool ===

The mempool message sends a request to a node asking for information about transactions it has verified but which have not yet confirmed. The response to receiving this message is an inv message containing the transaction hashes for all the transactions in the node's mempool.

No additional data is transmitted with this message.

It is specified in [https://github.com/bitcoin/bips/blob/master/bip-0035.mediawiki BIP 35]. Since [https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki BIP 37], only transactions matching the filter are replied.

=== checkorder ===

This message was used for [[IP Transactions]]. As IP transactions have been deprecated, it is no longer used.

=== submitorder ===

This message was used for [[IP Transactions]]. As IP transactions have been deprecated, it is no longer used.

=== reply ===

This message was used for [[IP Transactions]]. As IP transactions have been deprecated, it is no longer used.

=== ping ===

The ''ping'' message is sent primarily to confirm that the TCP/IP connection is still valid. An error in transmission is presumed to be a closed connection and the address is removed as a current peer.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 8 || nonce || uint64_t || random nonce
|}

=== pong ===

The ''pong'' message is sent in response to a ''ping'' message. In modern protocol versions, a ''pong'' response is generated using a nonce included in the ping.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 8 || nonce || uint64_t || nonce from ping
|}

=== reject===

The ''reject'' message is sent when messages are rejected.

Payload:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 1+ || message || var_str || type of message rejected
|-
| 1 || ccode || char || code relating to rejected message
|-
| 1+ || reason || var_str || text version of reason for rejection
|}

CCodes

{|class="wikitable"
! Value !! Name !! Description
|-
| 0x01 || REJECT_MALFORMED||
|-
| 0x10 || REJECT_INVALID ||
|-
| 0x11 || REJECT_OBSOLETE ||
|-
| 0x12 || REJECT_DUPLICATE ||
|-
| 0x40 || REJECT_NONSTANDARD ||
|-
| 0x41 || REJECT_DUST ||
|-
| 0x42 || REJECT_INSUFFICIENTFEE ||
|-
| 0x43 || REJECT_CHECKPOINT ||
|}

=== filterload, filteradd, filterclear, merkleblock ===

These messages are related to Bloom filtering of connections and are defined in [https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki BIP 0037].

The <code>filterload</code> command is defined as follows:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || filter || uint8_t[] || The filter itself is simply a bit field of arbitrary byte-aligned size. The maximum size is 36,000 bytes.
|-
| 4 || nHashFuncs || uint32_t || The number of hash functions to use in this filter. The maximum value allowed in this field is 50.
|-
| 4 || nTweak || uint32_t || A random value to add to the seed value in the hash function used by the bloom filter.
|-
| 1 || nFlags || uint8_t || A set of flags that control how matched items are added to the filter.
|}

See below for a description of the Bloom filter algorithm and how to select nHashFuncs and filter size for a desired false positive rate.

Upon receiving a <code>filterload</code> command, the remote peer will immediately restrict the broadcast transactions it announces (in inv packets) to transactions matching the filter, where the matching algorithm is specified below. The flags control the update behaviour of the matching algorithm.

The <code>filteradd</code> command is defined as follows:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || data || uint8_t[] || The data element to add to the current filter.
|}

The data field must be smaller than or equal to 520 bytes in size (the maximum size of any potentially matched object).

The given data element will be added to the Bloom filter. A filter must have been previously provided using <code>filterload</code>. This command is useful if a new key or script is added to a clients wallet whilst it has connections to the network open, it avoids the need to re-calculate and send an entirely new filter to every peer (though doing so is usually advisable to maintain anonymity).

The <code>filterclear</code> command has no arguments at all.

After a filter has been set, nodes don't merely stop announcing non-matching transactions, they can also serve filtered blocks. A filtered block is defined by the <code>merkleblock</code> message and is defined like this:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || version || uint32_t || Block version information, based upon the software version creating this block
|-
| 32 || prev_block || char[32] || The hash value of the previous block this particular block references
|-
| 32 || merkle_root || char[32] || The reference to a Merkle tree collection which is a hash of all transactions related to this block
|-
| 4 || timestamp || uint32_t || A timestamp recording when this block was created (Limited to 2106!)
|-
| 4 || bits || uint32_t || The calculated difficulty target being used for this block
|-
| 4 || nonce || uint32_t || The nonce used to generate this block… to allow variations of the header and compute different hashes
|-
| 4 || total_transactions || uint32_t || Number of transactions in the block (including unmatched ones)
|-
| ? || hashes || uint256[] || hashes in depth-first order (including standard varint size prefix)
|-
| ? || flags || byte[] || flag bits, packed per 8 in a byte, least significant bit first (including standard varint size prefix)
|}

=== alert ===

An '''alert''' is sent between nodes to send a general notification message throughout the network. If the alert can be confirmed with the signature as having come from the the core development group of the Bitcoin software, the message is suggested to be displayed for end-users. Attempts to perform transactions, particularly automated transactions through the client, are suggested to be halted. The text in the Message string should be relayed to log files and any user interfaces.

Alert format:

{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| ? || payload || uchar[] || Serialized alert payload
|-
| ? || signature || uchar[] || An ECDSA signature of the message
|}

The developers of Satoshi's client use this public key for signing alerts:
04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284
(hash) 1AGRxqDa5WjUKBwHB9XYEjmkv1ucoUUy1s

The payload is serialized into a uchar[] to ensure that versions using incompatible alert formats can still relay alerts among one another. The current alert payload format is:
{|class="wikitable"
! Field Size !! Description !! Data type !! Comments
|-
| 4 || Version || int32_t || Alert format version
|-
| 8 || RelayUntil || int64_t || The timestamp beyond which nodes should stop relaying this alert
|-
| 8 || Expiration || int64_t || The timestamp beyond which this alert is no longer in effect and should be ignored
|-
| 4 || ID || int32_t || A unique ID number for this alert
|-
| 4 || Cancel || int32_t || All alerts with an ID number less than or equal to this number should be cancelled: deleted and not accepted in the future
|-
| ? || setCancel || set<int32_t> || All alert IDs contained in this set should be cancelled as above
|-
| 4 || MinVer || int32_t || This alert only applies to versions greater than or equal to this version. Other versions should still relay it.
|-
| 4 || MaxVer || int32_t || This alert only applies to versions less than or equal to this version. Other versions should still relay it.
|-
| ? || setSubVer || set<string> || If this set contains any elements, then only nodes that have their subVer contained in this set are affected by the alert. Other versions should still relay it.
|-
| 4 || Priority || int32_t || Relative priority compared to other alerts
|-
| ? || Comment || string || A comment on the alert that is not displayed
|-
| ? || StatusBar || string || The alert message that is displayed to the user
|-
| ? || Reserved || string || Reserved
|}

Note: '''set<''type''>''' in the table above is a [[#Variable length integer | variable length integer]] followed by the number of fields of the given ''type'' (either int32_t or [[#Variable length string | variable length string]])

Sample alert (no message header):
73010000003766404f00000000b305434f00000000f2030000f1030000001027000048ee0000
0064000000004653656520626974636f696e2e6f72672f666562323020696620796f75206861
76652074726f75626c6520636f6e6e656374696e672061667465722032302046656272756172
79004730450221008389df45f0703f39ec8c1cc42c13810ffcae14995bb648340219e353b63b
53eb022009ec65e1c1aaeec1fd334c6b684bde2b3f573060d5b70c3a46723326e4e8a4f1

Version: 1
RelayUntil: 1329620535
Expiration: 1329792435
ID: 1010
Cancel: 1009
setCancel: <empty>
MinVer: 10000
MaxVer: 61000
setSubVer: <empty>
Priority: 100
Comment: <empty>
StatusBar: "See bitcoin.org/feb20 if you have trouble connecting after 20 February"
Reserved: <empty>

== Scripting ==

See [[script]].

==See Also==

* [[Network]]
* [[Protocol rules]]
* [[Hardfork Wishlist]]
* [https://bitcoin.org/en/developer-documentation Developer Documentation on bitcoin.org]
* Bitcoin dissectors for Wireshark: https://github.com/lbotsch/wireshark-bitcoin https://github.com/op-sig/bitcoin-wireshark-dissector

==References==
<references />

[[zh-cn:协议说明]]
[[Category:Technical]]
[[Category:Developer]]

Header

2014-09-04T10:22:06Z

Rebroad:

Headers are part of the bitcoin [[Protocol_Specification#Block_Headers|protocol]].

{{stub}}

Header

2014-09-04T10:18:44Z

Rebroad:

Headers are part of the bitcoin [[network|protocol]].

{{stub}}

Header

2014-09-04T10:17:35Z

Rebroad:

Headers are part of the bitcoin protocol.

{{stub}}

Header

2014-09-04T10:16:25Z

Rebroad: Blanked the page

Header

2014-09-04T10:09:05Z

Rebroad: Created page with "#redirect <Headers>"

#redirect <Headers>

Scalability

2014-09-01T02:53:23Z

Rebroad: /* Current bottlenecks */

The core Bitcoin network cannot scale to much higher transaction rates than are seen today without changing a core principle of the bitcoin protocol as defined in the Satoshi white paper, and assuming that nodes in the network are primarily running on high end servers rather than desktops. Bitcoin was designed to support lightweight clients that only process small parts of the block chain (see ''simplified payment verification'' below for more details on this). A configuration in which the vast majority of users sync lightweight clients to more powerful backbone nodes is capable of scaling to millions of users and tens of thousands of transactions per second.

==Scalability targets==

VISA handles on average around 2,000 transactions per second (tps), so call it a daily peak rate of 47,000 tps. [http://www.visa.com/blogarchives/us/2013/10/10/stress-test-prepares-visanet-for-the-most-wonderful-time-of-the-year/index.html]

PayPal, in contrast, handles around 4 million transactions per day for an average of 46 tps or a probably peak rate of 100 tps.

Let's take 4,000 tps as starting goal. Obviously if we want Bitcoin to scale to all economic transactions worldwide, including cash, it'd be a lot higher than that, perhaps more in the region of a few hundred thousand tps. And the need to be able to withstand DoS attacks (which VISA does not have to deal with) implies we would want to scale far beyond the standard peak rates. Still, picking a target let us do some basic calculations even if it's a little arbitrary.

==Current bottlenecks==

Today the Bitcoin network is restricted to a sustained rate of 7 tps due to the bitcoin protocol restricting block sizes to 1MB.

==CPU==

The protocol has two parts. Nodes send "inv" messages to other nodes telling them they have a new transaction. If the receiving node doesn't have that transaction it requests it with a getdata.

The big cost is the crypto and block chain lookups involved with verifying the transaction. Verifying a transaction means some hashing and some ECDSA signature verifications. RIPEMD-160 runs at 106 megabytes/sec (call it 100 for simplicity) and SHA256 is about the same. So hashing 1 megabyte should take around 10 milliseconds and hashing 1 kilobyte would take 0.01 milliseconds - fast enough that we can ignore it.

Bitcoin is currently able (with a couple of simple optimizations that are prototyped but not merged yet) to perform around 8000 signature verifications per second on an quad core [http://ark.intel.com/products/53469 Intel Core i7-2670QM 2.2Ghz processor]. The average number of inputs per transaction is around 2, so we must halve the rate. This means 4000 tps is easily achievable CPU-wise with a single fairly mainstream CPU.

As we can see, this means as long as Bitcoin nodes are allowed to max out at least 4 cores of the machines they run on, we will not run out of CPU capacity for signature checking unless Bitcoin is handling 100 times as much traffic as PayPal. As of late 2012 the network is handling 0.5 transactions/second, so even assuming enormous growth in popularity we will not reach this level for a long time.

Of course Bitcoin does other things beyond signature checking, most obviously, managing the database. We use LevelDB which does the bulk of the heavy lifting on a separate thread, and is capable of very high read/write loads. Overall Bitcoin's CPU usage is dominated by ECDSA.

==Network==

Let's assume an average rate of 2000tps, so just VISA. Transactions vary in size from about 0.2 kilobytes to over 1 kilobyte, but it's averaging half a kilobyte today.

That means that you need to keep up with around 8 megabits/second of transaction data (2000tps * 512 bytes) / 1024 bytes in a kilobyte / 1024 kilobytes in a megabyte = 0.97 megabytes per second * 8 = 7.8 megabits/second.

This sort of bandwidth is already common for even residential connections today, and is certainly at the low end of what colocation providers would expect to provide you with.

When blocks are solved, the current protocol will send the transactions again, even if a peer has already seen it at broadcast time. Fixing this to make blocks just list of hashes would resolve the issue and make the bandwidth needed for block broadcast negligable. So whilst this optimization isn't fully implemented today, we do not consider block transmission bandwidth here.

==Storage==

At very high transaction rates each block can be over half a gigabyte in size.

It is not required for most fully validating nodes to store the entire chain. In Satoshi's paper he describes "pruning", a way to delete unnecessary data about transactions that are fully spent. This reduces the amount of data that is needed for a fully validating node to be only the size of the current unspent output size, plus some additional data that is needed to handle re-orgs. As of October 2012 (block 203258) there have been 7,979,231 transactions, however the size of the unspent output set is less than 100MiB, which is small enough to easily fit in RAM for even quite old computers.

Only a small number of archival nodes need to store the full chain going back to the genesis block. These nodes can be used to bootstrap new fully validating nodes from scratch but are otherwise unnecessary.

The primary limiting factor in Bitcoin's performance is disk seeks once the unspent transaction output set stops fitting in memory. It is quite possible that the set will always fit in memory on dedicated server class machines, if hardware advances faster than Bitcoin usage does.

==Optimizations==

The description above applies to the current software with only minor optimizations assumed (the type that can and have been done by one man in a few weeks).

However there is potential for even greater optimizations to be made in future, at the cost of some additional complexity.

===CPU===

Pieter Wuille has implemented a custom verifier tuned for secp256k1 that can go beyond 20,000 signature verifications per second. It would require careful review by professional cryptographers to gain as much confidence as OpenSSL, but this can easily halve CPU load.

Algorithms exist to accelerate batch verification over elliptic curve signatures. This means if there are several inputs that are signing with the same key, it's possible to check their signatures simultaneously for another 9x speedup. This is a somewhat more complex implementation, however, it can work with existing signatures (clients don't need upgrading).

Newly developed digital signature algorithms, like [http://ed25519.cr.yp.to/ed25519-20110705.pdf ed25519] have extremely efficient software implementations that can reach speeds of nearly 80,000 verifications per second, even on an old Westmere CPU. That is a 10x improvement over secp256k1, and most likely is even higher on more modern CPUs. Supporting this in Bitcoin would mean a chain fork. This ECC algorithm has also been shown to be [http://eprint.iacr.org/2014/198 easily accelerated using GPUs], yielding scalar point multiplication times of less than a microsecond (i.e. a million point multiplications per second).

At these speeds it is likely that disk and memory bandwidth would become the primary limiting factor, rather than signature checking.

===Simplified payment verification===


It's possible to build a Bitcoin implementation that does not verify everything, but instead relies on either connecting to a trusted node, or puts its faith in high difficulty as a proxy for proof of validity. [[bitcoinj]] is an implementation of this mode.

In Simplified Payment Verification (SPV) mode, named after the section of Satoshi's paper that describes it, clients connect to an arbitrary full node and download only the block headers. They verify the chain headers connect together correctly and that the difficulty is high enough. They then request transactions matching particular patterns from the remote node (ie, payments to your addresses), which provides copies of those transactions along with a Merkle branch linking them to the block in which they appeared. This exploits the Merkle tree structure to allow proof of inclusion without needing the full contents of the block.

As a further optimization, block headers that are buried sufficiently deep can be thrown away after some time (eg, you only really need to store say 5000 blocks).

The level of difficulty required to obtain confidence the remote node is not feeding you fictional transactions depends on your threat model. If you are connecting to a node that is known to be reliable, the difficulty doesn't matter. If you want to pick a random node, the cost for an attacker to mine a block sequence containing a bogus transaction should be higher than the value to be obtained by defrauding you. By changing how deeply buried the block must be, you can trade off confirmation time vs cost of an attack.

Programs implementing this approach can have fixed storage/network overhead in the null case of no usage, and resource usage proportional to received/sent transactions.

See also: [[Thin Client Security]].

== Related work ==
There are a few proposals for optimizing Bitcoin's scalability. Some of these require an alt-chain / hard fork.

* [https://bitcointalk.org/index.php?topic=88208.0 Ultimate blockchain compression] - the idea that the blockchain can be compressed to achieve "trust-free lite nodes"
* [http://www.bitfreak.info/files/pp2p-ccmbc-rev1.pdf The Finite Blockchain] paper that describes splitting the blockchain into three data structures, each better suited for its purpose. The three data structures are a finite blockchain (keep N blocks into the past), an "account tree" which keeps account balance for every address with a non-zero balance, and a "proof chain" which is an (ever growing) slimmed down version of the blockchain.

[[Category:Technical]]

Scalability

2014-09-01T02:51:18Z

Rebroad: 7 tps is pretty much the limit based on the 1MB block size limit

The core Bitcoin network cannot scale to much higher transaction rates than are seen today without changing a core principle of the bitcoin protocol as defined in the Satoshi white paper, and assuming that nodes in the network are primarily running on high end servers rather than desktops. Bitcoin was designed to support lightweight clients that only process small parts of the block chain (see ''simplified payment verification'' below for more details on this). A configuration in which the vast majority of users sync lightweight clients to more powerful backbone nodes is capable of scaling to millions of users and tens of thousands of transactions per second.

==Scalability targets==

VISA handles on average around 2,000 transactions per second (tps), so call it a daily peak rate of 47,000 tps. [http://www.visa.com/blogarchives/us/2013/10/10/stress-test-prepares-visanet-for-the-most-wonderful-time-of-the-year/index.html]

PayPal, in contrast, handles around 4 million transactions per day for an average of 46 tps or a probably peak rate of 100 tps.

Let's take 4,000 tps as starting goal. Obviously if we want Bitcoin to scale to all economic transactions worldwide, including cash, it'd be a lot higher than that, perhaps more in the region of a few hundred thousand tps. And the need to be able to withstand DoS attacks (which VISA does not have to deal with) implies we would want to scale far beyond the standard peak rates. Still, picking a target let us do some basic calculations even if it's a little arbitrary.

==Current bottlenecks==

Today the Bitcoin network is restricted to a sustained rate of 7 tps by some artificial limits. These were put in place to stop people from ballooning the size of the block chain before the network and community was ready for it. Once those limits are lifted, the maximum transaction rate will go up significantly.

==CPU==

The protocol has two parts. Nodes send "inv" messages to other nodes telling them they have a new transaction. If the receiving node doesn't have that transaction it requests it with a getdata.

The big cost is the crypto and block chain lookups involved with verifying the transaction. Verifying a transaction means some hashing and some ECDSA signature verifications. RIPEMD-160 runs at 106 megabytes/sec (call it 100 for simplicity) and SHA256 is about the same. So hashing 1 megabyte should take around 10 milliseconds and hashing 1 kilobyte would take 0.01 milliseconds - fast enough that we can ignore it.

Bitcoin is currently able (with a couple of simple optimizations that are prototyped but not merged yet) to perform around 8000 signature verifications per second on an quad core [http://ark.intel.com/products/53469 Intel Core i7-2670QM 2.2Ghz processor]. The average number of inputs per transaction is around 2, so we must halve the rate. This means 4000 tps is easily achievable CPU-wise with a single fairly mainstream CPU.

As we can see, this means as long as Bitcoin nodes are allowed to max out at least 4 cores of the machines they run on, we will not run out of CPU capacity for signature checking unless Bitcoin is handling 100 times as much traffic as PayPal. As of late 2012 the network is handling 0.5 transactions/second, so even assuming enormous growth in popularity we will not reach this level for a long time.

Of course Bitcoin does other things beyond signature checking, most obviously, managing the database. We use LevelDB which does the bulk of the heavy lifting on a separate thread, and is capable of very high read/write loads. Overall Bitcoin's CPU usage is dominated by ECDSA.

==Network==

Let's assume an average rate of 2000tps, so just VISA. Transactions vary in size from about 0.2 kilobytes to over 1 kilobyte, but it's averaging half a kilobyte today.

That means that you need to keep up with around 8 megabits/second of transaction data (2000tps * 512 bytes) / 1024 bytes in a kilobyte / 1024 kilobytes in a megabyte = 0.97 megabytes per second * 8 = 7.8 megabits/second.

This sort of bandwidth is already common for even residential connections today, and is certainly at the low end of what colocation providers would expect to provide you with.

When blocks are solved, the current protocol will send the transactions again, even if a peer has already seen it at broadcast time. Fixing this to make blocks just list of hashes would resolve the issue and make the bandwidth needed for block broadcast negligable. So whilst this optimization isn't fully implemented today, we do not consider block transmission bandwidth here.

==Storage==

At very high transaction rates each block can be over half a gigabyte in size.

It is not required for most fully validating nodes to store the entire chain. In Satoshi's paper he describes "pruning", a way to delete unnecessary data about transactions that are fully spent. This reduces the amount of data that is needed for a fully validating node to be only the size of the current unspent output size, plus some additional data that is needed to handle re-orgs. As of October 2012 (block 203258) there have been 7,979,231 transactions, however the size of the unspent output set is less than 100MiB, which is small enough to easily fit in RAM for even quite old computers.

Only a small number of archival nodes need to store the full chain going back to the genesis block. These nodes can be used to bootstrap new fully validating nodes from scratch but are otherwise unnecessary.

The primary limiting factor in Bitcoin's performance is disk seeks once the unspent transaction output set stops fitting in memory. It is quite possible that the set will always fit in memory on dedicated server class machines, if hardware advances faster than Bitcoin usage does.

==Optimizations==

The description above applies to the current software with only minor optimizations assumed (the type that can and have been done by one man in a few weeks).

However there is potential for even greater optimizations to be made in future, at the cost of some additional complexity.

===CPU===

Pieter Wuille has implemented a custom verifier tuned for secp256k1 that can go beyond 20,000 signature verifications per second. It would require careful review by professional cryptographers to gain as much confidence as OpenSSL, but this can easily halve CPU load.

Algorithms exist to accelerate batch verification over elliptic curve signatures. This means if there are several inputs that are signing with the same key, it's possible to check their signatures simultaneously for another 9x speedup. This is a somewhat more complex implementation, however, it can work with existing signatures (clients don't need upgrading).

Newly developed digital signature algorithms, like [http://ed25519.cr.yp.to/ed25519-20110705.pdf ed25519] have extremely efficient software implementations that can reach speeds of nearly 80,000 verifications per second, even on an old Westmere CPU. That is a 10x improvement over secp256k1, and most likely is even higher on more modern CPUs. Supporting this in Bitcoin would mean a chain fork. This ECC algorithm has also been shown to be [http://eprint.iacr.org/2014/198 easily accelerated using GPUs], yielding scalar point multiplication times of less than a microsecond (i.e. a million point multiplications per second).

At these speeds it is likely that disk and memory bandwidth would become the primary limiting factor, rather than signature checking.

===Simplified payment verification===


It's possible to build a Bitcoin implementation that does not verify everything, but instead relies on either connecting to a trusted node, or puts its faith in high difficulty as a proxy for proof of validity. [[bitcoinj]] is an implementation of this mode.

In Simplified Payment Verification (SPV) mode, named after the section of Satoshi's paper that describes it, clients connect to an arbitrary full node and download only the block headers. They verify the chain headers connect together correctly and that the difficulty is high enough. They then request transactions matching particular patterns from the remote node (ie, payments to your addresses), which provides copies of those transactions along with a Merkle branch linking them to the block in which they appeared. This exploits the Merkle tree structure to allow proof of inclusion without needing the full contents of the block.

As a further optimization, block headers that are buried sufficiently deep can be thrown away after some time (eg, you only really need to store say 5000 blocks).

The level of difficulty required to obtain confidence the remote node is not feeding you fictional transactions depends on your threat model. If you are connecting to a node that is known to be reliable, the difficulty doesn't matter. If you want to pick a random node, the cost for an attacker to mine a block sequence containing a bogus transaction should be higher than the value to be obtained by defrauding you. By changing how deeply buried the block must be, you can trade off confirmation time vs cost of an attack.

Programs implementing this approach can have fixed storage/network overhead in the null case of no usage, and resource usage proportional to received/sent transactions.

See also: [[Thin Client Security]].

== Related work ==
There are a few proposals for optimizing Bitcoin's scalability. Some of these require an alt-chain / hard fork.

* [https://bitcointalk.org/index.php?topic=88208.0 Ultimate blockchain compression] - the idea that the blockchain can be compressed to achieve "trust-free lite nodes"
* [http://www.bitfreak.info/files/pp2p-ccmbc-rev1.pdf The Finite Blockchain] paper that describes splitting the blockchain into three data structures, each better suited for its purpose. The three data structures are a finite blockchain (keep N blocks into the past), an "account tree" which keeps account balance for every address with a non-zero balance, and a "proof chain" which is an (ever growing) slimmed down version of the blockchain.

[[Category:Technical]]

Talk:How to set up a secure offline savings wallet

2012-12-23T14:27:56Z

Rebroad: Created page with "This isn't secure. The procedure for sending bitcoins involves connecting the offline wallet to the internet. This should not be necessary, and carries some risk (e.g. the liv..."

This isn't secure. The procedure for sending bitcoins involves connecting the offline wallet to the internet. This should not be necessary, and carries some risk (e.g. the livecd could be compromised or contain a trojen, or the O/S could contain a vulnerability). It should be possible to create the transaction offline, and then execute it on an online system. --[[User:Rebroad|Rebroad]] ([[User talk:Rebroad|talk]]) 14:27, 23 December 2012 (GMT)

Myths

2012-12-02T11:36:41Z

Rebroad: /* Early adopters are unfairly rewarded */ correction!

Let's clear up some common Bitcoin misconceptions.

== Bitcoin is just like all other digital currencies; nothing new ==

Nearly all other digital currencies are centrally controlled. This means that:
* They can be printed at the subjective whims of the controllers
* They can be destroyed by attacking the central point of control
* Arbitrary rules can be imposed upon their users by the controllers

Being decentralized, Bitcoin solves all of these problems.

== Bitcoins don't solve any problems that fiat currency and/or gold doesn't solve ==

Unlike gold, bitcoins are:
* Easy to transfer
* Easy to secure
* Easy to verify
* Easy to granulate

Unlike fiat currencies, bitcoins are:
* Predictable and limited in [[Controlled_Currency_Supply|supply]]
* Not controlled by a central authority (such as [http://en.wikipedia.org/wiki/Federal_Reserve The United States Federal Reserve])

Unlike electronic fiat currency systems, bitcoins are:
* Potentially anonymous
* Freeze-proof
* Faster to transfer
* Cheaper to transfer

== Bitcoin is backed by processing power ==

It is not correct to say that Bitcoin is "backed by" processing power. A currency being "backed" means that it is pegged to something else via a central party at a certain exchange rate yet you cannot exchange bitcoins for the computing power that was used to create them. Bitcoin is in this sense not backed by anything. It is a currency in its own right. Just as gold is not backed by anything, the same applies to Bitcoin.

The Bitcoin currency is ''created'' via processing power, and the integrity of the block chain is ''protected'' by the existence of a network of powerful computing nodes from certain [[Weaknesses#Attacker_has_a_lot_of_computing_power|attacks]].

== Bitcoins are worthless because they aren't backed by anything ==

One could argue that gold isn't backed by anything either. Bitcoins have properties resulting from the system's design that allows them to be subjectively valued by individuals. This valuation is demonstrated when individuals freely exchange for or with bitcoins. Please refer to the [http://en.wikipedia.org/wiki/Subjective_theory_of_value Subjective Theory of Value].

See also: the "[[#Bitcoin_is_backed_by_processing_power|Bitcoin is backed by processing power]]" myth.

== The value of bitcoins are based on how much electricity and computing power it takes to mine them ==

This statement is an attempt to apply to Bitcoin the [http://en.wikipedia.org/wiki/Labor_theory_of_value labor theory of value], which is generally accepted as false. Just because something takes X resources to create does not mean that the resulting product will be worth X. It can be worth more, or less, depending on the utility thereof to its users.

In fact the causality is the reverse of that (this applies to the labor theory of value in general). The cost to mine bitcoins is based on how much they are worth. If bitcoins go up in value, more people will mine (because [[Mining|mining]] is profitable), thus [[difficulty]] will go up, thus the cost of mining will go up. The inverse happens if bitcoins go down in value. These effects balance out to cause mining to always cost an amount proportional to the value of bitcoins it produces.

== Bitcoins have no intrinsic value (unlike some other things) ==

It is true that bitcoins have no intrinsic value, in the [http://en.wikipedia.org/wiki/Intrinsic_value_%28numismatics%29 numismatic sense], in other words, value in any realm outside of being used as a medium of exchange.

However, while some tangible commodities do have intrinsic value, that value is generally much less than its trading price. Consider for example that gold, if it were not used as an inflation-proof store of value, but rather only for its industrial uses, would certainly not be worth what it is today, since the industrial requirements for gold are far smaller than the available supply thereof.

While historically intrinsic value, as well as other attributes like divisibility, fungibility, scarcity, durability, helped establish certain commodities as mediums of exchange, it is certainly not a prerequisite. While bitcoins lack 'intrinsic value' in this sense, they make up for it in spades by possessing the other qualities necessary to make it a good medium of exchange, equal to or better than [http://en.wikipedia.org/wiki/Commodity_money commodity money].

Value is ultimately determined by what people are willing to trade for - by supply and demand.

== Bitcoins are illegal because they're not legal tender ==

Chickens aren't legal tender either, but bartering with chickens is not illegal.

There are a [http://en.wikipedia.org/wiki/Local_currency number of currencies] in existence that are not official government-backed currencies. A currency is, after all, nothing more than a convenient unit of account. While national laws may vary from country to country, and you should certainly check the laws of your jurisdiction, in general trading in any commodity, including digital currency like Bitcoin, [http://en.wikipedia.org/wiki/BerkShares BerkShares], game currencies like WoW gold, or Linden dollars, is not illegal.

== Bitcoin is a form of domestic terrorism because it only harms the economic stability of the USA and its currency ==

http://en.wikipedia.org/wiki/Definitions_of_terrorism#United_States according to this, you need to do violent activities to be considered a terrorist for legal purposes. Recent off-the-cuff remarks by politicians have no basis in law or fact.

Also, Bitcoin isn't domestic to the US or any other country. It's a worldwide community. See this map of Bitcoin nodes
https://bitcointalk.org/?topic=2346.0

== Bitcoin will only enable tax evaders which will lead to the eventual downfall of civilization ==

Cash transactions hold the same level of anonymity but are still taxed successfully. It is up to you to follow the applicable state laws in your home country, or face the consequences.

While it may be easy to transfer bitcoins anonymously, ''spending'' them anonymously on tangibles is just as hard as spending any other kind of money anonymously. Tax evaders are often caught because their lifestyle and assets are inconsistent with their reported income, and not necessarily because government is able to follow their money.

== Bitcoins can be printed/minted by anyone and are therefore worthless ==

Bitcoins are not printed/minted. Instead, [[Blocks]] are computed by miners and for their efforts they are awarded a specific amount of bitcoins and transaction fees paid by others. See [[Mining]] for more information on how this process works.

== Bitcoins are worthless because they're based on unproven cryptography ==

SHA256 and ECDSA which are used in Bitcoin are well-known industry standard algorithms. SHA256 is endorsed and used by the US Government and is standardized (FIPS180-3 Secure Hash Standard). If you believe that these algorithms are untrustworthy then you should not trust Bitcoin, credit card transactions or any type of electronic bank transfer. Bitcoin has a sound basis in well understood cryptography.

== Early adopters are unfairly rewarded ==

Early adopters are rewarded for taking the higher risk with their time and money. This argument is akin to saying that people who buy stock at a company IPO (Initial Public Offering) are unfairly rewarded. This argument also depends on bitcoin early adopters using bitcoins to store rather than transfer value. The daily trade on the exchanges (as of Jan 2012) indicates that smaller transactions are becoming the norm, indicating trade rather than investment.

In more pragmatic terms, "fairness" is an arbitrary concept that is improbable to be agreed upon by a large population. Establishing "fairness" is no goal of Bitcoin, as this would be impossible.

By starting to mine or acquire bitcoins today, you too can become an early adopter.

== 21 million coins isn't enough; doesn't scale ==

One Bitcoin is divisible down to eight decimal places. There are really 2,099,999,997,690,000 (just over 2 quadrillion) maximum possible atomic units in the bitcoin design.

The value of "1 BTC" represents 100,000,000 of these. In other words, each is divisible by up to 10^8.

As the value of the unit of 1 BTC grows too large to be useful for day to day transactions, people can start dealing in smaller [[Units|units]], such as milli-bitcoins (mBTC) or micro-bitcoins (μBTC).

== Bitcoins are stored in wallet files, just copy the wallet file to get more coins! ==

No, your wallet contains your secret keys, giving you the rights to spend your bitcoins. Think of it like having bank details stored in a file. If you give your bank details (or bitcoin wallet) to someone else, that doesn't double the amount of money in your account. You can spend your money or they can spend your money, but not both.

== Lost coins can't be replaced and this is bad ==

Bitcoins are divisible to 0.00000001, so there being fewer bitcoins remaining is not a problem for the currency itself. If you lose your coins, all other coins will go up in value a little. Consider it a donation to all other bitcoin users.

A related question is: Why don't we have a mechanism to replace lost coins? The answer is that it is impossible to distinguish between a 'lost' coin and one that is simply sitting unused in someone's wallet.

== It's a giant ponzi scheme ==
In a Ponzi Scheme, the founders persuade investors that they’ll profit. Bitcoin does not make such a guarantee. There is no central entity, just individuals building an economy.

A ponzi scheme is a zero sum game. In a ponzi scheme, early adopters can only profit at the expense of late adopters, and the late adopters always lose. Bitcoin has an expected win-win outcome. Early and present adopters profit from the rise in value as Bitcoins become better understood and in turn demanded by the public at large. All adopters benefit from the usefulness of a reliable and widely-accepted decentralized peer-to-peer currency.

== Finite coins plus lost coins means deflationary spiral ==
As deflationary forces may apply, economic factors such as hoarding are offset by human factors that may lessen the chances that a [[Deflationary spiral]] will occur.

== Bitcoin can't work because there is no way to control inflation ==

Inflation is simply a rise of prices over time, which is generally the result of the devaluing of a currency. This is a function of supply and demand. Given the fact that the supply of bitcoins is fixed at a certain amount, unlike fiat money, the only way for inflation to get out of control is for demand to disappear. Temporary inflation is possible with a rapid adoption of Fractional Reserve Banking but will stabilize once a substantial number of the 21 million "hard" bitcoins are stored as reserves by banks.

Given the fact that Bitcoin is a distributed system of currency, if demand were to decrease to almost nothing, the currency would be doomed anyway.

The key point here is that Bitcoin as a currency can't be inflated by any single person or entity, like a government, as there's no way to increase supply past a certain amount.

Indeed, the most likely scenario, as Bitcoin becomes more popular and demand increases, is for the currency to increase in value, or deflate, until demand stabilizes.

== The Bitcoin community consists of anarchist/conspiracy theorist/gold standard 'weenies' ==

The members of the community vary in their ideological stances.

== Anyone with enough computing power can take over the network ==

CONFIRMED, see [[Weaknesses]].

That said, as the network grows, it becomes harder and harder for a single entity to do so. Already the Bitcoin network's computing power is quite ahead of the world's fastest supercomputers, together.

What an attacker can do once the network is taken over is quite limited. Under no circumstances could an attacker create counterfeit coins, fake transactions, or take anybody else's money. An attacker's capabilities are limited to taking back their own money that they very recently spent, and preventing other people's transactions from receiving confirmations. Such an attack would be very costly in resources, and for such meager benefits there is little rational economic incentive to do such a thing.

Furthermore, this attack scenario would only be feasible for as long as it was actively underway. As soon as the attack stopped, the network would resume normal operation.

== Bitcoin violates governmental regulations ==

There is no known governmental regulation which disallows the use of Bitcoin.

See also: the "[[#Bitcoins_are_illegal_because_they.27re_not_legal_tender|Bitcoins are illegal because they're not legal tender]]" myth.

== Fractional reserve banking is not possible ==

It is possible. See the main article, [[Fractional Reserve Banking and Bitcoin]]

== Point of sale with bitcoins isn't possible because of the 10 minute wait for confirmation ==

It is true that transactions [[FAQ#Why_do_I_have_to_wait_10_minutes_before_I_can_spend_money_I_received.3F|can]] sometimes take tens of minutes to become ''confirmed''. Despite this, retailers can accept unconfirmed transactions with very little risk by simply 'listening' on the network for a double-spend transaction, or partnering with a company that provides this service. After a head start of merely several seconds, the original transaction would reach so much of the Bitcoin network that a fraudulent double-spend transaction would almost certainly be fruitless. An attacker would have to commit easily-detectable fraud, in person, several hundred or several thousand times, before one of these low-value double-spend attempts would likely succeed.

An attacker could work around the necessity of sending out a second fraudulent transaction to the Bitcoin network by attempting to [[Mining|solo-mine]] an attack block containing the attack transaction himself - temporarily withholding the block with the rest of the network - and then execute the fraudulent purchase within seconds, or minutes at most, of mining the attack block, before broadcasting the attack block. However, the cost of such an activity would dramatically outweigh the value of anything typically offered without a confirmation wait for several reasons.

First, mining a block (attack or otherwise) entitles the miner to a valuable block reward, and because the attack involves temporarily withholding the block from the network, the attacker would put himself in the likely position of his block becoming [[Stale block|stale]], which would result in forfeiture of the entire reward. Most solo miners solve less than one block per month, so this would represent the loss of proceeds of potentially several weeks of mining.

Second, it is not possible for a solo miner to know exactly when his mining activity will yield a block, and because the attack must be carried out within seconds or minutes of successfully mining a block, the attacker will not be able to know or plan in advance the brief window when the attack would be likely to succeed. While it may be easy for a determined attacker to get low-value items that are sold and delivered online instantly without waiting for confirmations (such as downloads), this unpredictability and the briefness of the opportunity would make it extremely difficult to commit any kind of fraud where real-life interaction is required, such as visiting a merchant or taking possession of goods. Petty shoplifting would be far simpler. Even if an attacker went forward with this attack, the retailer would be notified of the fraud the moment the attack block is released seconds later.

In short, the 10-minute wait for confirmation is only practically necessary when delivering goods of value that significantly exceed the block reward an attacker would have to risk to perform an attack and where recourse after delivery is practically nonexistent, such as money transfers.

== After 21 million coins are mined, no one will generate new blocks ==

When operating costs can't be covered by the block creation bounty, which will happen some time before the total amount of BTC is reached, miners will earn some profit from [[transaction fees]]. However unlike the block reward, there is [http://bitcoin.stackexchange.com/questions/876/how-much-will-transaction-fees-eventually-be/895#895 no coupling between transaction fees and the need for security], so there is less of a guarantee that the amount of [[Mining|mining]] being performed will be sufficient to maintain the network's security.

== Bitcoin has no built-in chargeback mechanism, and this isn't good ==

'''Why some people think this is bad''': Chargebacks are useful for limiting fraud. The person handling your money has a responsibility to prevent fraud. If you buy something on eBay and the seller never ships it, PayPal takes funds from the seller's account and gives you back the money. This strengthens the eBay economy, because people recognize that their risk is limited and are more willing to purchase items from risky sellers.

'''Why it's actually a good thing''': Bitcoin is designed such that your money is yours and yours alone. Allowing chargebacks implies that it is possible for another entity to take your money from you. You can have either total ownership rights of your money, or fraud protection, but not both. That said, nothing inherent in the dollar or euro or any other currency is necessary for chargebacks to be possible, and likewise, nothing prevents the creation of PayPal-like services denominated in Bitcoin that provide chargebacks or fraud protection.

The statement "The person handling your money has a responsibility to prevent fraud" is still true; the power has been shifted into your own hands. Fraud will always exist. It's up to you to only send bitcoins to trusted entities. It is possible to trust an online identity without ever knowing their physical identity; see the [http://wiki.bitcoin-otc.com/wiki/OTC_Rating_System OTC Web of Trust].

== Quantum computers would break Bitcoin's security ==

Yes, but quantum computers don't yet exist and probably won't for a while. Bitcoin's security can be [http://en.wikipedia.org/wiki/Post-quantum_cryptography upgraded] if this were considered an imminent threat.

See the implications of quantum computers on public key cryptography here http://en.wikipedia.org/wiki/Quantum_computer#Potential

The ''risk'' of quantum computers is also there for financial institutions, like banks, because they heavily rely on cryptography when doing transactions.

== [[Mining|Bitcoin mining]] is a waste of energy and harmful for ecology ==

No more so than the wastefulness of mining gold out of the ground, melting it down and shaping it into bars, and then putting it back underground again. Not to mention the building of big fancy buildings, the waste of energy printing and minting all the various fiat currencies, the transportation thereof in armored cars by no less than two security guards for each who could probably be doing something more productive, etc.

As far as mediums of exchange go, Bitcoin is actually quite economical of resources, compared to others.

'''Economic Argument 1'''

[[Mining|Bitcoin mining]] is a highly competitive, dynamic, almost [http://en.wikipedia.org/wiki/Perfect_market perfect], market. Mining rigs can be set up and dismantled almost anywhere in the world with relative ease. Thus, market forces are constantly pushing mining activity to ''places'' and ''times'' where the marginal price of electricity is low or zero. These electricity products are cheap for a reason. Often it’s because the electricity is difficult (and wasteful) to transport, difficult to store, or because there is low demand and high supply. Using electricity in this way is a lot less wasteful than simply plugging a mining rig into the mains indiscriminately.

For example, Iceland produces an excess of cheap electricity from renewable sources, but it has no way of exporting electricity because of its remote location. It is conceivable that at some point in future Bitcoin mining will only be profitable in places like Iceland, and unprofitable in places like central Europe, where electricity comes mostly from nuclear and fossil sources.

Market forces could even push mining into innovative solutions that have an effective electricity consumption of ''zero''. Mining always produces heat equivalent to the energy consumed - for example, 1000 watts of mining equipment produces the same amount of heat as a 1000 watt heating element used in an electric space heater, hot tub, water heater, or similar appliance. Someone already in a willing position to incur the cost of electricity for its heat value alone could run mining equipment specially designed to mine bitcoins while capturing and utilizing the heat produced, without incurring any energy costs beyond what they already intended to spend on heating.

'''Economic Argument 2'''

When the environmental costs of mining are considered, they need to be weighed up against the benefits. If you question Bitcoin on the grounds that it consumes electricity, then you should also ask questions like this: Will Bitcoin promote economic growth by freeing up trade? Will this speed up the rate of technological innovation? Will this lead to faster development of green technologies? Will Bitcoin enable new, border crossing [http://en.wikipedia.org/wiki/Smart_grid smart grid] technologies? …

Dismissal of Bitcoin because of its costs, while ignoring its benefits, is a dishonest argument. In fact, any environmental argument of this type is dishonest, not just pertaining to Bitcoin. Along similar lines, it could be argued that wind turbines are bad for the environment because making the steel structure consumes energy.

== Shopkeepers can't seriously set prices in bitcoins because of the volatile exchange rate ==

Your assumption is that bitcoins must be sold immediately to cover operating expenses. If the shopkeeper's back-end expenses were transacted in bitcoins as well, then the exchange rate would be irrelevant. Larger adoption of Bitcoin would make prices [http://en.wikipedia.org/wiki/Sticky_%28economics%29 sticky]. Future volatility is expected to decrease, as the size and depth of the market grows.

In the meantime, many merchants simply regularly pull the latest market rates from the exchanges and automatically update the prices on their websites. Also you might be able to buy a put option in order to sell at a fixed rate for a given amount of time. This would protect you from drops in price and simplify your operations for that time period.

== Like Flooz and e-gold, bitcoins serve as opportunities for criminals and will be shut down ==

* Visa, MasterCard, PayPal, and cash all serve as opportunities for criminals as well, but society keeps them around due to their recognized net benefit.
* Hopefully Bitcoin will grow to the point where no single organization can disrupt the network, or would be better served by helping it.
* Terrorists fly aircraft into buildings, but the governments have not yet abolished consumer air travel. Obviously the public good outweighs the possible bad in their opinion.
* Criminal law differs between jurisdictions.

== Bitcoins will be shut down by the government just like Liberty Dollars were ==

Liberty Dollars started as a commercial venture to establish an alternative US currency, including physical banknotes and coins, backed by precious metals. This, in and of itself, is not illegal. They were prosecuted under counterfeiting laws because the silver coins allegedly resembled US currency.

Bitcoins do not resemble the currency of the US or of any other nation in any way, shape, or form. The word "dollar" is not attached to them in any way. The "$" symbol is not used in any way.

Bitcoins have no representational similarity whatsoever to US dollars.

Of course, actually 'shutting down' Liberty Dollars was as easy as arresting the head of the company and seizing the offices and the precious metals used as backing. The decentralized Bitcoin, with no leader, no servers, no office, and no tangible asset backing, does not have the same vulnerability.

== Bitcoin is not decentralized because the developers can dictate the software's behavior ==

The Bitcoin protocol was originally defined by Bitcoin's inventor, [[Satoshi Nakamoto]], and this protocol has now been widely accepted as the standard by the community of miners and users.

Though the developers of the original Bitcoin client still exert influence over the Bitcoin community, their power to arbitrarily modify the protocol is very limited. Since the release of Bitcoin v0.3, changes to the protocol have been minor and always in agreement with community consensus.

Protocol modifications, such as increasing the block award from 50 to 100 BTC, are not compatible with clients already running in the network. If the developers were to release a new client that the majority of miners perceives as corrupt, or in violation of the project’s aims, that client would simply not catch on, and the few users who do try to use it would find that their transactions get rejected by the network.

There are also other [[:Category:Clients|Bitcoin clients made by other developers]] that adhere to the Bitcoin protocol. As more developers create alternative clients, less power will lie with the developers of the original Bitcoin client.

== Bitcoin is a pyramid scheme ==

Bitcoin is nearly opposite of a pyramid scheme in a mathematical sense. Because Bitcoins are algorithmically made scarce, no exponential benefit is derived from introducing new users to use of it. There is a quantitative benefit in having additional interest or demand, but this is in no way exponential.

[[de:Mythen]]

BIP 0033

2012-05-16T23:37:36Z

Rebroad: /* Security */

{{bip}}

<pre>
BIP: 31
Title: Stratized Nodes
Author: Amir Taaki <genjix@riseup.net>
Status: Draft
Type: Standards Track
Created: 15-05-2012
</pre>

== Abstract ==

As the Bitcoin network scales, roles are fast becoming specialised. In the beginning, a single Bitcoin user would perform the synonymous roles of miner, merchant and end-user. With the growth however of this system, these functions are being abstracted away to specialised services as a natural part of Bitcoin's growth.

Bitcoin's blockchain becomes more unwieldy for end users over time, negatively affecting the usability of Bitcoin clients. As it grows, it becomes ever more impractical to deal with on portable devices or low end machines. Several proposals have been put forward to deal with this such as lightweight (headers-only) clients and skipping validation for blocks before the last checkpoint. However these measures are at best stop-gap workarounds to stave off a growing problem.

This document will examine a proposal which will be termed ''stratized nodes'', a modification off an earlier concept termed ''blockchain service''.

== History ==

Jan Moller created BCCAPI in 2011. BCCAPI allowed a user's client to delegate blockchain interaction to a remote server. This server would store and manage the blockchain while the user client would run queries against that server.

ThomasV later created Electrum server. BCCAPI's server backend was proprietary, and Electrum required a full Free Software stack. Electrum's server was an adhoc temporary replacement. As it grew and became used, issues started to appear in its design.

Marek Palatinus (slush) drafted a new standard called Stratum to replace Electrum's server. Stratum has multiple transports and is usable as a blockchain server by merchants, miners and user-clients. Electrum moved to using a Stratum implementation first relying on ABE/bitcoind and more recently libbitcoin.

Stratum is unmaintained by Marek Palatinus, suffers from easy resource starvation and denial of service attacks, and is insecure. The proposal specified here is intended to replace the Stratum's role as a blockchain for user-clients. The proposal here is solely concerned with removing the onus of blockchain validation and lookups from user-clients to specialised services in a secure manner. Any secondary benefits or uses are purely incidental.

== Overview ==

During the initial handshake between Bitcoin nodes, a version packet is sent. version packets have a bitfield called services. Nodes can fill this field to tell the network how they behave and which services they support. NODE_NETWORK (1) means a node can be asked for full blocks for example.

We propose two more values of NODE_SERVICE (2) and NODE_STRATIZED (4).

=== NODE_SERVICE ===

* A blockchain service which supports the additional messages "getoutputs" and "getspends".
* Does not respond to "getdata" messages by itself (unless NODE_NETWORK is specified)
* If NODE_NETWORK is specified, then "getdata" for transactions will retrieve them not only from the memory pool but also check the blockchain if necessary.

=== NODE_STRATIZED ===

* A node which uses the stratized strategy specified in this document.
* NODE_STRATIZED will relay inventories for accepted transactions.
* Does not support "getblocks" as stratized nodes do not contain the entire blockchain.

Apart from the differences noted above, the nodes are otherwise unchanged in their behaviour from NODE_NETWORK.

== Specification ==

=== Initialisation ===

Four new messages are defined which are represented below in C-like pseudocode.

"getoutputs"
<pre>
struct decoded_address
{
uint8_t payment_type;
uint8_t address_hash[16];
};

struct get_outputs
{
decoded_address dest;
};
</pre>

"outputs"
<pre>
struct point_t
{
uint8_t hash[32];
uint32_t index;
};

struct outputs
{
decoded_address dest;
uint64_t number_outputs; // variable uint
point_t outpoints[];
};
</pre>

"getspend"
<pre>
struct get_spend
{
point_t outpoint;
};
</pre>

"spend"
<pre>
struct spend
{
point_t outpoint, inpoint;
};
</pre>

These four messages allow a node to discover the history of a Bitcoin address without needing direct access to the blockchain.

A typical use case might look like:
# Send "getoutputs" for a decoded Bitcoin address.
# Receive "outputs", and loop through each contained output point:
## Send "getdata" to download the transaction for that point.
## Send "getspend" for each output point.
# Receive "spend":
## Send "getdata" to download the transaction for that input point.

This sequence allows the gradual but fast build up of history for an address.

=== Updates ===

Nodes receive "inv" messages as normal from service nodes, issuing "getdata" to download the block or transaction data. From this they check for newly sent (in the input points) or received (in the output points) payments in the transaction data.

Note that blocks must at minimum have their merkle root validated and transactions must be checked for uniqueness by stratized nodes.

== Security ==

The concern here is that stratized nodes are at the mercy of blockchain services. This proposal deals with that issue by designing this protocol in such a way that the implementation can resolve the common history between multiple services.

A stratized node will typically connect to 8 blockchain services. It will only accept an output, spend or inventory vector that has been sent by a common subset of all those services (6 in our example). This spreads the risk between all services, and does not make a node vulnerable to any one rogue blockchain service.

== Privacy ==

The other strategy for thin clients termed ''headers-only'' or ''Simplified. Payment. Verification.'' have the same privacy issues as this proposal. SPV resolves this problem by sending out fake requests for transaction data which obfuscates the client data. By sending out a sufficient number of fake requests, privacy can be kept to a sufficient level.

== Rationale ==

NODE_SERVICE does not respond to "getdata" requests by itself (unless used in conjunction with NODE_NETWORK) to prevent starvation attacks. This allows a single trusted NODE_SERVICE architecture (possibly acting as a front-end to multiple backends) to service very many nodes while externalising the costs to the Bitcoin network.

NODE_STRATIZED tries its best to maintain the facade and help upkeep the Bitcoin network (see relaying), but cannot support "getblocks" as it does not have the entire blockchain.

== Backwards Compatibility ==

This proposal is an addon to the current Bitcoin network, and is completely backwards compatible.