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* ]: Forked at block 478558,<ref>{{Cite web|url=https://www.bitcoincash.org/#faq|title=Bitcoin Cash - Peer-to-Peer Electronic Cash|website=Bitcoincash.org|language=en|access-date=2017-12-03}}</ref> {{Date|2017-08-01}}, for each bitcoin (BTC), an owner got 1 Bitcoin Cash (BCH) * ]: Forked at block 478558,<ref>{{Cite web|url=https://www.bitcoincash.org/#faq|title=Bitcoin Cash - Peer-to-Peer Electronic Cash|website=Bitcoincash.org|language=en|access-date=2017-12-03}}</ref> {{Date|2017-08-01}}, for each bitcoin (BTC), an owner got 1 Bitcoin Cash (BCH)
* ]: Cross fork from Bitcoin to Ethereum blockchain at block 478558, 1 August 2017.<ref>{{cite web|url=https://markets.businessinsider.com/news/stocks/bitcoin-investment-trust-announces-abandonment-of-bitcoin-diamond-and-bytether-1010231081|title=Bitcoin Investment Trust Announces Abandonment of Bitcoin Diamond and Bytether}}</ref> For each 1 BTC you get 1 BTH ERC-20 token.<ref>{{cite web|url=https://thebitcoinpodcast.com/release/what-is-bytether/|title=What is Bytether}}</ref>
* ]: Forked at Block 478558, {{Date|2017-08-01}}.<ref>{{cite web|url=https://motherboard.vice.com/en_us/article/pa345z/meet-bitcoin-clashic-a-weird-bitcoin-cash-fork-rebellion|title=Meet 'Bitcoin Clashic,' a Weird and Totally Unexpected Cryptocurrency Rebellion}}</ref><ref>{{cite web|url=https://bitcoinist.com/bitcoin-clashic-bitcoin-cash-fork/|title=BITCOIN CLASHIC? BITCOIN CASH ‘MALICIOUS FORK’ TURNS WEIRD}}</ref><ref>{{cite web|url=https://news.bitcoin.com/a-true-network-or-troll-a-look-at-the-bitcoin-clashic-project/|title=A True Network or Troll? A Look at the “Bitcoin Clashic” Project}}</ref> For each 1 BTC you get 1 BCHC / BCL.
* ]: Forked at block 491407,<ref>{{Cite news|url=https://bitcoingold.org/faq/|title=FAQ - Bitcoin Gold|website=Bitcoingold.org|access-date=2017-12-03|language=en-US}}</ref> {{Date|2017-10-24}}, for each BTC, an owner got 1 Bitcoin Gold (BTG) * ]: Forked at block 491407,<ref>{{Cite news|url=https://bitcoingold.org/faq/|title=FAQ - Bitcoin Gold|website=Bitcoingold.org|access-date=2017-12-03|language=en-US}}</ref> {{Date|2017-10-24}}, for each BTC, an owner got 1 Bitcoin Gold (BTG)
* ]: Forked at Block 495866<ref>{{Cite web|url=http://www.btcd.io/#faq|title=Bitcoin Diamond BCD - Based on Bitcoin protocol to improve the privacy & processing speed of transaction.|website=www.btcd.io|language=en|access-date=2017-12-03}}</ref><ref>{{cite web|url=https://coinsutra.com/buy-sell-bitcoin-diamond-bcd-exchanges/|title=Bitcoin Diamond (BCD): A Full List Of Bitcoin Diamond Exchanges}}</ref>, {{Date|2017-11-24}}.<ref>{{cite web|url=https://ethereumworldnews.com/bitcoin-diamond-bcd-gains-105-percent-binance-listing/|title=Bitcoin Diamond (BCD) The only Gainer Among the Top 100 Cryptos, Rises +105% In 24 Hours}}</ref><ref>{{cite web|url=https://news.bitcoin.com/kucoin-issues-warning-bitcoin-diamond-soars-40x-crashes/|title=Kucoin Issues a Warning After Bitcoin Diamond Soars 40x and Then Crashes}}</ref><ref>{{cite web|url=https://hacked.com/bitcoin-diamond-bcd-and-binance-a-256-pump-amid-the-global-dump/|title=Bitcoin Diamond (BCD) and Binance: A 256% Pump Amid the Global Dump}}</ref><ref>{{cite web|url=https://www.coininsider.com/bitcoin-diamond-retrospective/|title=Bitcoin Diamond: A valuable gem worth keeping an eye on?}}</ref> For each 1 BTC you get 10 BCD.
* ]: Forked at Block 498777<ref>{{cite web|url=https://news.bitcoin.com/united-bitcoin-may-be-the-most-controversial-fork-to-date/|title=United Bitcoin May Be the Most Controversial Fork to Date}}</ref>, {{Date|2017-12-12}}, For each 1 BTC you may get 1 UB if you take special actions to claim it.
* ]: Forked at Block 498888<ref>{{cite web|url=https://captainaltcoin.com/what-is-super-bitcoin-sbtc/|title=Super Bitcoin: Another Bitcoin Fork – Serious or Scam?}}</ref>, 12 December 2017.<ref>{{cite web|url=https://www.forexnewsnow.com/forex-analysis/cryptocurrency/super-bitcoin-sbtc-crypto-bitcoin-great/|title=What is Super Bitcoin (SBTC) crypto and will it make Bitcoin great again?}}</ref> For each 1 BTC you get 1 SBTC.
* ]: Forked at block 511346,<ref>{{Cite news|url=https://btcprivate.org/|title=FAQ - Bitcoin Private|website=btcprivate.org/|access-date=2018-04-03|language=en-US}}</ref> {{Date|2018-02-28}}, for each Bitcoin (BTC) or ZClassic (ZCL), an owner got 1 Bitcoin Private (BTCP). * ]: Forked at block 511346,<ref>{{Cite news|url=https://btcprivate.org/|title=FAQ - Bitcoin Private|website=btcprivate.org/|access-date=2018-04-03|language=en-US}}</ref> {{Date|2018-02-28}}, for each Bitcoin (BTC) or ZClassic (ZCL), an owner got 1 Bitcoin Private (BTCP).


Note that there are numerous other split coins that might not be notable enough to appear in this list. Note that there are numerous other split coins that might not be notable enough to appear in this list.


==Intended soft forks splitting from not-most-work block== ==Intended soft forks splitting from not-most-work block==

Revision as of 01:36, 19 November 2018

For broader coverage of this topic, see Fork (blockchain) and forks.

Bitcoin forks are defined variantly as changes in the protocol of the bitcoin network or as the situations that occur "when two or more blocks have the same block height". A fork influences the validity of the rules. Forks are typically conducted in order to add new features to a blockchain, to reverse the effects of hacking or catastrophic bugs. Forks require consensus to be resolved or else a permanent split emerges.

Forks of the client software

The following are forks of the software client for the bitcoin network:

All three software clients attempt to increase transaction capacity of the network. None achieved a majority of the hash power.

Intended hard forks splitting the cryptocurrency

Hard forks splitting bitcoin (aka "split coins") are created via changes of the blockchain rules and sharing a transaction history with bitcoin up to a certain time and date. The first hard fork splitting bitcoin happened on 1 August 2017, resulting in the creation of Bitcoin Cash. The following is a list of hard forks splitting bitcoin by date and/or block:

  • Bitcoin Cash: Forked at block 478558, 1 August 2017, for each bitcoin (BTC), an owner got 1 Bitcoin Cash (BCH)
  • Bitcoin Gold: Forked at block 491407, 24 October 2017, for each BTC, an owner got 1 Bitcoin Gold (BTG)
  • Bitcoin Private: Forked at block 511346, 28 February 2018, for each Bitcoin (BTC) or ZClassic (ZCL), an owner got 1 Bitcoin Private (BTCP).

Note that there are numerous other split coins that might not be notable enough to appear in this list.

Intended soft forks splitting from not-most-work block

  • The fork fixing the value overflow incident was controversial because it was announced after the exploit was mined.

Unintended hard forks

Two hard forks were created by "protocol change" definition:

  • March 2013 Chain Fork (migration from BerkeleyDB to LevelDB caused a chain split)
  • CVE-2018-17144 (Bitcoin 0.15 allowed double spending certain inputs in the same block. Not exploited)

Proposed (but canceled) forks

  • SegWit2x: This was a planned fork which was later canceled before the split could take place.

References

  1. Tarr, Andrew (July 19, 2017). "UASF vs. UAHF, Explained". CoinTelegraph. Retrieved 22 March 2018.
  2. Antonopoulos, Andreas (2017). Mastering Bitcoin: Programming the Open Blockchain (2 ed.). USA: O' Reilly media, inc. p. Glossary. ISBN 978-1491954386.
  3. Jamie Redman (5 November 2017). "A Simple Guide to What Bitcoin Forks Are and Why They Happen". bitcoin.com. Retrieved 23 April 2018.
  4. Ammous, Saifedean (2018). The Bitcoin Standard: The Decentralized Alternative to Central Banking. John Wiley & Sons. pp. 227, 228. ISBN 9781119473893. Retrieved 23 April 2018.
  5. "Blockchain Forks Are All the Rage, But Can They Ever Be Safe? - CoinDesk". Coindesk.com. 19 October 2017. Retrieved 17 January 2018.
  6. "What is Bitcoin Cash? A Basic Beginners Guide - Blockgeeks". Blockgeeks.com. Retrieved 17 January 2018.
  7. "Bitcoin Cash - Peer-to-Peer Electronic Cash". Bitcoincash.org. Retrieved 2017-12-03.
  8. "FAQ - Bitcoin Gold". Bitcoingold.org. Retrieved 2017-12-03.
  9. "FAQ - Bitcoin Private". btcprivate.org/. Retrieved 2018-04-03.
  10. https://en.bitcoin.it/Value_overflow_incident
  11. March 2013 Chain Fork
  12. CVE-2018-17144

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