Testnet

2018-10-07T19:26:31Z

Mn3monic:

The '''testnet''' is an alternative Bitcoin [[block chain]], to be used for testing. Testnet coins are separate and distinct from actual bitcoins, and are never supposed to have any value. This allows application developers or bitcoin testers to experiment, without having to use real bitcoins or worrying about breaking the main bitcoin chain.

Run bitcoin or bitcoind with the -testnet flag to use the testnet (or put testnet=1 in the bitcoin.conf file).

There have been three generations of testnet. Testnet2 was just the first testnet reset with a different genesis block, because people were starting to trade testnet coins for real money. '''Testnet3''' is the current test network. It was introduced with the 0.7 release, introduced a third genesis block, a new rule to avoid the "difficulty was too high, is now too low, and transactions take too long to verify" problem, and contains blocks with edge-case transactions designed to test implementation compatibility. On the December 21 of 2015 SegNet was deployed, to test the Wuille's Segregated Witness proposal.

==Differences==
* Default Bitcoin network protocol listen port is 18333 (instead of 8333)
* Default RPC connection port is 18332 (instead of 8332)
* Bootstrapping uses different DNS seeds.
* A different value of ADDRESSVERSION field ensures no testnet Bitcoin addresses will work on the production network. (0x6F rather than 0x00)
* The protocol message header bytes are 0x0B110907 (instead of 0xF9BEB4D9)
* Minimum [[difficulty]] of 1.0 on testnet is equal to difficulty of 0.5 on mainnet. This means that the mainnet-equivalent of any testnet difficulty is half the testnet difficulty. In addition, if no block has been found in 20 minutes, the difficulty automatically resets back to the minimum for a single block, after which it returns to its previous value.
* A new genesis block
* The IsStandard() check is disabled so that non-standard transactions can be experimented with.

==Genesis Block==

Testnet uses a different genesis block to the main network. You can find it [https://www.biteasy.com/testnet/blocks/000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943 here] or [http://blockexplorer.com/testnet/b/0 here].
The testnet was [https://github.com/gavinandresen/bitcoin-git/commit/feeb761ba07af74a7cd78b8c8f7c2a961fd9ea1c reset with a new genesis block] for the 0.7 bitcoin release.

==Size==
Testnet receives less transactions than the main block chain and is typically much smaller in size. As of January 2018 the size of the data on disk was 14GB, containing data for about 6 years worth of testnet activity. Downloading this data required about 12GB of network activity peaking at 2MB/s rate of transfer.

==External links==

* [https://bitcointalk.org/?topic=4483.0 Testnet in a box forum topic]
* [https://sourceforge.net/projects/bitcoin/files/Bitcoin/testnet-in-a-box/ Testnet-In-A-Box self-contained testnet]
* [https://github.com/freewil/bitcoin-testnet-box Forked/Updated testnet-box]

===Wallets===

Online testnet wallets to help you test your application.

* [http://testnetwallet.com/ TestnetWallet.com]
* [https://CoPay.io/ CoPay.io] wallet supports TestNet accounts

===Faucets===

Once you're done with your test coins, it is a nice gesture to send them back to the faucets, so they become available to other developers.

* [http://bitcoinfaucet.uo1.net/ UO1 Testnet Faucet]
* [https://play.google.com/store/apps/details?id=com.mycelium.testnetwallet Mycelium Testnet Wallet for Android with integrated Testnet "faucet" function (Local Trader)]
* [https://testnet-faucet.mempool.co mempool.co testnet3 Faucet]

Offline (2018-09-06):

* [http://tpfaucet.appspot.com/ TP's TestNet Faucet]
* [http://kuttler.eu/bitcoin/btc/faucet/ nkuttler's Bitcoin Testnet Faucet], transactions are made through Joinmarket, a [[CoinJoin]] implementation
* [https://testnet.manu.backend.hamburg/faucet flyingkiwi's TestNet Faucet]

Offline (2016-08-07):

* [http://faucet.luis.im/ luis.im Mojocoin Testnet3 Faucet]
* [https://accounts.blockcypher.com/testnet-faucet BlockCypher Testnet Faucet], also provided as a [http://dev.blockcypher.com/#faucets Testnet faucet API] for test automation

===Block explorers===
* [https://www.biteasy.com/testnet/blocks Biteasy.com Testnet Blockexplorer]
* [http://testnet.blockchain.info Blockchain.info Testnet Explorer]
* [http://tbtc.blockr.io/ Bitcoin Testnet on Blockr.io]
* [https://test-insight.bitpay.com/ Bitcoin Testnet on insight.bitpay.com]
* [https://www.blocktrail.com/tBTC BlockTrail Testnet Explorer, Testnet API and Testnet Faucet]
* [https://live.blockcypher.com/btc-testnet/ BlockCypher Testnet Explorer]
[[Category:Technical]]
[[Category:Developer]]

{{Bitcoin Core documentation}}

Fallback Nodes

2014-11-01T12:36:37Z

Mn3monic: high bandwidth nodes

This is a list of nodes which are considered reliable.

== How to use this list ==

=== Connect to nodes ===

You can connect to these nodes with the ''-addnode=ip'' switch instead of the usual node harvesting process (through IRC or via the embedded nodelist). You can connect to more than one node by using ''-addnode=ip'' more than once. It is usually a good idea to connect to more than one of these nodes.

==== Nodes without a fixed ip ====

If the node IP is not fixed (see "Fixed" column), you will have to resolve the node's name (first column) each time the IP changes. Some nodes may have their ip change once a day, some others once a month, and some others may stay on the same IP for years. Still, as long as the IP is not fixed, there is no guarantee it will stay the same.

In order to enable hostname lookups for the ''-addnode'' and ''-connect'' parameters, you must additionally provide the ''-dns'' parameter. Example:
bitcoind -dns -addnode=bitcoin.es

Versions prior to 0.3.22 do not support hostnames to the ''-addnode'' parameter, so you must do the resolving part for it. For example on linux:
bitcoind -addnode=$(dig +short bitcoin.es)

=== IP Transactions ===

You can also send [[IP Transactions]] to these nodes. If you include your bitcoin address in the "message" field, you may have your coins back.

=== Tor network ===

To use Bitcoin-Qt over Tor hidden services, in a terminal/console enter:
bitcoin-qt -proxy=127.0.0.1:9050 -onlynet=tor

To use Bitcoin with one specific Tor node, run
bitcoin-qt -proxy=127.0.0.1:9050 -connect=abcde.onion
, where abcde.onion needs to be substituted with one of the [[Fallback_Nodes#Tor_nodes|Tor nodes below]]. These parameters can be added to [[Running_Bitcoin#Bitcoin.conf_Configuration_File|bitcoin.conf]] to make them permanent.

You can find detailed information on running clients and hidden services within Tor in the [https://github.com/bitcoin/bitcoin/blob/master/doc/tor.md documentation].

== Nodes list ==

=== IPv6 Nodes ===
{|class="wikitable sortable"
! Hostname !! Owner !! IP !! Fixed !! Status !! Last Seen (GMT) !! Accepts IP transactions
|-

| InductiveSoul.US || [[User:Inductivesoul|Inductive Soul]] || 2601:7:6680:2ac:4d29:40ff:7513:fcc7 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || 11-13-2013 (MDY) || Yes
|-
| caffeinator.net || [[User:Atrophy|Atrophy]] || || || {{Fallback Nodes/Node Up}} || 2013-05-10 ||
|-
| 2001:470:8:2e1::40 || ? || 2001:470:8:2e1::40 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| x.jine.se || jine || 213.112.52.246 || {{Table Value No}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| messier.bzfx.net || BZFX/[[User:A Meteorite|A Meteorite]] || 2001:41d0:1:d632::1 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || ||
|-
| bitcoin.bitdonut.co || James Hartig

|}

=== IPv4 Nodes ===
{|class="wikitable sortable"
! Hostname !! Owner !! IP !! Fixed !! Status !! Last Seen (GMT) !! Accepts IP transactions
|-

|-
| node.bitcoin.xxx || www.BitCoin.xxx || 66.228.49.201 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || 2014-08-28 || Yes
|-
| bitcoin.coinprism.com || [[Coinprism]] || 137.116.225.142 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || 2014-04-26 || Yes
|-
|-
| btcnode1.evolyn.net || Evolyn || 85.214.251.25 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || 2014-01-26 || Yes
|-
| InductiveSoul.US || [[User:Inductivesoul|Inductive Soul]] || 67.186.224.85 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || 2013-11-13 || Yes
|-
| archivum.info || Ferraro Ltd.|| 88.198.58.172 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| 62.75.216.13 || exMULTI, Inc. || 62.75.216.13 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || No
|-
| 69.64.34.118 || exMULTI, Inc. || 69.64.34.118 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || No
|-
| 79.160.221.140 || K-Norway || 79.160.221.140 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| netzbasis.de || unknown3 || 81.169.129.25 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| btc.turboadmin.com || osmosis || 98.143.152.14 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || No
|-
| fallback.bitcoin.zhoutong.com || Zhou Tong || 117.121.241.140 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || No
|-
| bauhaus.csail.mit.edu || imsaguy || 128.30.96.44 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| jun.dashjr.org || Luke-Jr || 173.242.112.53 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || ||
|-
| cheaperinbitcoins.com || Xenland/Shane || 184.154.36.82 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| django.webflows.fr || unknown2 || 188.165.213.169 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| 204.9.55.71 || toasty || 204.9.55.71 || {{Table Value Yes}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| btcnode.novit.ro || ovidiusoft - novit.ro || 93.187.142.114 || {{Table Value No}} || {{Fallback Nodes/Node Down}} || || Yes
|-
| porgressbar.sk || progressbar hackerspace || 91.210.181.21 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| faucet.bitcoin.st || bitcoin street || 64.27.57.225 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| bitcoin.securepayment.cc || SecurePayment CC || 63.247.147.163 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| x.jine.se || jine || 213.112.48.166 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| www.dcscdn.com || [[User:Danw12|Danw12]] || 199.115.228.181 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || ||
|-
| ns2.dcscdn.com || [[User:Danw12|Danw12]] || 199.115.228.182 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || ||
|-
| coin.soul-dev.com || Soul-Dev || || || {{Fallback Nodes/Node Up}} || ||
|-
| messier.bzfx.net || BZFX/[[User:A Meteorite|A Meteorite]] || 91.121.205.50 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || ||
|-
| btcnode1.bitgroup.cc || BitGroup || 198.211.116.191 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| btcnode2.bitgroup.cc || BitGroup || 162.243.120.138 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| btcnode3.bitgroup.cc || BitGroup || 95.85.8.237 || {{Table Value Yes}} || {{Fallback Nodes/Node Up}} || || Yes
|-
| bitcoin.bitdonut.co || James Hartig
|-
| coinno.de || jaknam
|-
| 82.165.44.44 || anonymous
|-
| bitcoin1.dassori.me || gdassori
|-
| bitcoin2.dassori.me || gdassori

|}

=== Tor nodes ===

This entire list was last checked on 2014-07-24.

{|class="wikitable sortable"
! Hostname !! Owner !! Status !! Last Seen (GMT) !! Accepts IP transactions
|-
| tsyvzsqwa2kkf6b2.onion || TorDude || Down || 2014-05-19 || No
|-
| i2r5tbaizb75h26f.onion || TorDude || Up || 2014-07-24 || No
|-
| igpdszqrbqjhak5z.onion || anonymous || Down || 2014-05-15 || ?
|-
| btcnet3utgzyz2bf.onion || anonymous || Up || 2014-07-24 || Yes
|-
| evolynhit7shzeet.onion || Evolyn || Down || 2014-05-15 || Yes
|-
| bitcoin2u5jnjzzz.onion || anonymous || Down || 2014-01-27 || Yes
|-
| btc4ulpftizx5b72.onion || TorNode || Down || 2013-05-10 || Yes
|-
| vso3r6cmjoomhhgg.onion || echelon || Up || 2014-07-24 || Yes
|-
| yyl3ipdmyjkfypmx.onion || redemerald || Down || 2013-05-10 || Yes
|-
| pqosrh6wfaucet32.onion || bitcoin street || Up || 2014-07-24 || No
|-
| zy3kdqowmrb7xm7h.onion || Tril || Up || 2014-07-24 || No
|-
| z55v4ostefnwfy32.onion || Tril || Down || 2014-04-09 || No
|-
| e3tn727fywnioxrc.onion || Zedd || Up || 2014-07-24 || No
|-
| 6hgmaxwellgpv2oe.onion || Gmaxwell || Down || 2012-07-01 || No
|-
| kjy2eqzk4zwi5zd3.onion || sipa || Up || 2014-07-24 || No
|-
| siqdznszjf4e6v5j.onion || Tuxavant || Down || 2013-05-10 || ?
|-
| bk5ejfe56xakvtkk.onion || dserrano5 || Up || 2014-10-23 || No
|-
| sjdntqu5roj4q6lo.onion || torservers || Down || 2012-05-19 || ?
|-
| bitcoin2bkgm3fke.onion || ? || Down || 2012-05-19 || Yes
|-
| 7hxvg2lvr2ashzli.onion || Tuxavant || Down || 2013-05-10 || ?
|-
| mutqcuh7hwxmhx3k.onion || Xirafe || Down || 2012-06-23 || ?
|-
| r4de4zf4lyniu4mx.onion:8444 || ? || Up || 2014-07-24 || ?
|-
| bitcoinprwwpuinm.onion:8333 || ? || Down || 2012-06-26 || ?
|-
| x3danbeag2kyx644.onion || redemerald || Down || 2013-01-04 || Yes
|}

== Adding a node ==

Before adding yourself as a fallback node, you should be sure your node will stay online for a long time. If a node is offline for more than 24 hours it will be removed from the list.

To add a node in this list, you just need the ip/hostname and your name, the other fields will be filled automatically. Insert the following lines before the <tt>END NODELIST</tt> line:

<nowiki>|-
| ip || your name</nowiki>

==See Also==

* [[Network|Bitcoin Network]]
* [http://nodes.bitcoin.st Fallback Nodes] List of longest running Bitcoin Nodes listed by Country.
* [https://getaddr.bitnodes.io/ Bitnodes project]
* [https://blockchain.info/connected-nodes Recently connected nodes at blockchain.info]

Bitcoin Wiki - User contributions [en]

Testnet

Fallback Nodes