Invoice address

2012-09-20T14:11:19Z

Amondo: word "approximately" implies can be greater than 34 alphanumeric characters

A '''Bitcoin address''', or simply '''address''', is an identifier of 34 alphanumeric characters (or less), beginning with the number 1 or 3, 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-Qt]], one can click "Get 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.

An example of a Bitcoin address is ''37muSN5ZrukVTvyVh3mT5Zc5ew9L9CBare''.

==A Bitcoin address is like an e-mail address==
Like e-mail, you can send bitcoins to a person by sending bitcoins to one of their addresses. A person can have many different Bitcoin addresses and, for increased privacy, it is recommended that you use a unique address for each transaction. Most Bitcoin software and websites will help with this by generating a brand new address each time you perform a transaction. Some services provide a facility to request a new Bitcoin address for use with their service when desired.

When using a web site that accepts bitcoins or holds Bitcoin balances on your behalf, that website will assign a Bitcoin address to your account, so you can transfer funds into your account at the site. Very much unlike e-mail, this address may change every time funds come in so care should be taken when sending additional funds to a previously-used address. When you send Bitcoins to your account at a web site, they will usually be credited to your account at that web site after the transaction is [[confirmation|confirmed]].

==Addresses can be created offline==
Creating addresses can be done without an Internet connection and do not require any contact or registration with the Bitcoin network. The network only knows about an address when it is first used in a transaction. Because addresses can be created easily and at minimal cost, it is not uncommon to create temporary addresses that can be discarded if unused.

It is also possible to create large batches of addresses offline using other 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.

==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 client. You will have to check your entry and try again.

The probability that a mistyped address is accepted as being valid is 1 in 2<sup>32</sup> or approximately 1 in 4.29 billion.

==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.

==Most addresses have a "private key"==
For most addresses, there is a corresponding secret number known as a [[private key]] that is required to spend funds previously sent to an address.

When using a Bitcoin client, private keys are typically stored in the [[wallet file]]. The private key has a special purpose - it is mathematically needed to create valid transactions that spend the funds originally sent to the address. If the private key to an address is lost (for example, in a hard drive crash, fire or other natural disaster), any associated Bitcoins are effectively lost forever.

==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 and still be valid.
A significant percentage of Bitcoin addresses are only 33 characters, and some older addresses may be even shorter.
Every Bitcoin address stands for a number - somewhat like an account 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.

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

[[Category:Vocabulary]]

Software

2012-05-01T22:13:21Z

Amondo: I noticed that Armory was missing from the list of software and also that the Armory page had no backlinks.

List of Bitcoin-related software. See also [[:Category:Software|Category:Software]].

==Bitcoin clients==
===Bitcoin clients===
*[[Bitcoin-qt]] - C++/Qt based tabbed UI for Bitcoin, Linux/MacOSX/Windows, full-featured
*[[bitcoind]] - GUI-less version of the standard Bitcoin client, providing [[API reference (JSON-RPC)|JSON-RPC]] interface (see also -server option of the standard client)
*[[Bitcoin-js-remote]] - JavaScript RPC client, support for QR codes
* [https://bitcointalk.org/index.php?topic=50721.0 subvertx] -Command line bitcoin tools.
*[[BitCoinJ]] - Java client library by Google, early development stage
*[[Electrum]] - lightweight client
*[[Bitcoiner]] - Java RPC client (Android)
*[[Spesmilo]] - Python/PySide RPC client
*[[Armory]] - python-based client currently an alpha-level release, the beta version is being crowdfunded

====Frontends to eWallet====
*[[BitPay]] - Android application
*[https://blockchain.info/wallet Blockchain] - Javascript bitcoin client with client side encryption.

====Experimental====
*[[Freecoin]] - C++ client, supports alternative currencies like [[Beertoken]]
*[[BitDroid]] - Java client
*[[Bitdollar]] - C++/Qt client, unstable beta version

===Libraries===
*[https://bitcointalk.org/index.php?topic=30646.0 libbitcoin]
*[[BCCAPI]] (Bitcoin Client API) - a java library designed for making secure light-weight bitcoin clients.

==Bitcoin Trade Data==
*[[Bitcoin Charts]] – Html website that has trading data for virtual all the bitcoin markets.
*[[MtGox Live]] - Html website that shows a live fee of [[MtGox]] trade data in an innovative chart form. (Must Use Chrome)
*[[Bitcoin Sentiment Index]] - A financial index that collects and disseminates sentiment data about bitcoin.
*[[Preev]] - Bitcoin converter with live exchange rates.

==Bitcoin software==

===Web interfaces for merchants===
*[[Bitcoin Evolution]] - Non wallet-based Buy Now button to insert into websites (handles sales tracking; client must be used for actual transaction)
*[[Bit-pay]] - Buy Now buttons, Checkout posts/callbacks, Mobile Checkout, JSON API
*[[Btceconomy]] - a JavaScript widget listing items for sale
*[[Javascript Bitcoin Converter]] - currency conversion

===Shopping Cart Integration in eCommerce-Systems===
*[[Zen Cart Bitcoin Payment Module]] - a payment module that interacts with bitcoind for the Zen Cart eCommerce shopping chart.
*[[Karsha Shopping Cart Interface]] - is a mobile payment-interface which enables its users to accept payments.
*[[Bitcoin-Cash]] - an easy to use payment module for xt:Commerce
*[[Bit-pay]] - bitcoin plugins for Magento, Opencart, Zencart, PHP, JSON API

===Web apps (opensource)===
*[[Bitcoin Central]] - currency exchange
*[[Bitcoin Poker Room]] - poker site
*[[Abe]] - block chain viewer
*[[Simplecoin]] - PHP web frontend for a pool
*[[bitcoin_simple_php_tools]] simple php tools for webmasters

===Browser extensions===
*[[Bitcoin Extension]] - check balance and send bitcoins (Chrome)
*[[Bitcoin Prices (extension)]] - monitoring price (Firefox)
*[[Bitcoin Ticker]] - monitoring price (Chrome)
*[[Bitcoin Tool]] - recognizes Bitcoin addresses on websites (Firefox, Chrome, IE)
*[[Biticker]] - Bitcoin ticker, currency converter and history price graph (Chrome)

===PC apps===
*[[BTConvert]] - currency conversion
*[[Sierra Chart MtGox Bridge]] - real-time charting
*[[BTC Trader]] - live charting and tech-analysis
*[[BitTicker]] - monitoring price (Mac OS X)
*[[ToyTrader]] - a command line trading tool for [[MtGox]]
*[[goxsh]] - a command-line frontend to the [[MtGox|Mt. Gox Bitcoin Exchange]] (Python)
*[[MyBitcoins gadget]] - monitoring pool earnings / price (Windows gadget)

===Mobile apps===
==== iPhone / iPad ====
*[https://blockchain.info/wallet/iphone-app Blockchain] - Fully featured iphone bitcoin app.
*[[Bitcoin Ticker (iPhone)]] - monitoring price w/push notifications
*[[BitCoins Mobile]] - First iPad native app! Live market data, news feeds, mining pool statistics, full screen exchange price charts, bitcoin network statistical charts. (iPad only, iPhone/iPod Touch coming soon!)
*[https://github.com/teeman/BitcoinTrader BitcoinTrader] - Spend/receive BTC via QR codes, trade, deposit/withdraw, etc. Supports Mt. Gox, TradeHill, ExchB, CampBX, and InstaWallet.
*[[Bit-pay]] - Mobile Checkout, set prices in any currency and receive mobile-to-mobile payment
*[[Easywallet.org]] - Web based wallet, works with QR Code scanner on iPhone/iPad/iPod touch

==== Android ====
* Direct link to Android Market bitcoin apps. https://market.android.com/search?q=bitcoin
*[https://blockchain.info/wallet/android-app Blockchain] - Lightweight Android Bitcoin Client - Also works with blockchain.info web interface and iphone app.
*[[Bitcoin Wallet for Android]] - This is the most functional android bitcoin wallet application. https://market.android.com/details?id=de.schildbach.wallet
*[[Bitcoin-android]] - Does not appear to be being maitained anymore. https://market.android.com/details?id=com.bitcoinandroid
*[[Bitpay]] - https://market.android.com/details?id=com.bitcoin.bitpay (Is not related to the bit-pay.com online payment processor.)
*[[Easywallet.org]] - Web based wallet, works with QR Code scanner on Android devices

*[[Bitcoin Alert]] - monitoring price (Android)
*[[BitcoinX]] - monitoring price (Android)
*[[BtcMobile]] - monitoring price and mining pool statistics (iPhone/iPad, Android)
*[[Miner Status]] - monitoring miner status (Android)
*[[SMS Bitcoins]] - transactions by SMS
*[[Bitcoin Wallet Balance]] - view your balance in real time on your android phone

see also [[Bitcoin Payment Apps]]

===Operating systems===
*[[LinuxCoin]] - a lightweight Debian-based OS, with the Bitcoin client and GPU mining software

===Mining apps===
*[[BTCMiner]] - Bitcoin Miner for ZTEX FPGA Boards
*[[Poclbm]] - Python/OpenCL GPU miner ([[Poclbm-gui|GUI(Windows & MacOS X)]])
*[[Poclbm-mod]] - more efficient version of [[Poclbm]] ([[Poclbm-mod-gui|GUI]])
*[[DiabloMiner]] - Java/OpenCL GPU miner ([[DiabloMiner.app|MAC OS X GUI]])
*[[RPC Miner]] - remote RPC miner ([[RPCminer.app|MAC OS X GUI]])
*[[Phoenix miner]] - miner
*[[Cpu Miner]] - miner
*[[Ufasoft miner]] - miner
*[[Pyminer]] - Python miner, reference implementation
*[[Remote miner]] - mining pool software
*[[Open Source FGPA Bitcoin Miner]] - a miner that makes use of an FPGA Board

===Mining Pool Servers (backend)===
*[[Pushpoold]] - The original mining pool server
*[[Poold]] - Python mining pool server
*[[PoolServerJ]] - Java mining pool server

===Utilities, libraries, and interfaces:===
*[[Bitcointools]] - a set of Python tools accessing the transaction database and the wallet
*[[Finance::MtGox]] - a Perl module which interfaces with the Mt. Gox API
*[[BitcoinCrypto]] - a lightweight Bitcoin crypto library for Java/Android
*[[Bitcoin Dissector]] - a wireshark dissector for the bitcoin protocol

===Lists of software===
*[[BitGit]] - list of Bitcoin-related opensource projects hosted at Git

===Developer resources===
*[[:Category:Developer|Category:Developer]]
*[[:Category:Technical|Category:Technical]]
*[[Original Bitcoin client/API calls list]]
*[[API reference (JSON-RPC)]]

===Other===
*[[Namecoin]] - a distributed naming system based on Bitcoin technology
*[[Bitcoin Consultancy]] - an organization providing open source software and Bitcoin-related consulting
*[[Open Transactions]] - a financial crypto and digital cash software library, complementary to Bitcoin
*[[Moneychanger]] - Java-based GUI for [[Open Transactions]]
*[http://btcnames.org/ BTCnames] - a webbased aliasing service which allows to handle unlimited names for your BTC deposit hashes
*[[Devcoin]] - the open source developer coin

Bitcoin Wiki - User contributions [en]

Invoice address

Software