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:''Not to be confused with [[Segregated Witness]], which is commonly abbreviated as SegWit.''<br/> | :''Not to be confused with [[Segregated Witness]], which is commonly abbreviated as SegWit.''<br/> | ||
'''SegWit2x''', ( | '''SegWit2x''', (abbreviated '''B2X''' or '''S2X''', and originally called '''SegWit2Mb'''), was a failed contentious hardfork outlined in the [[New York Agreement]] that intended to double the block size limit. The hardfork has been denounced as an attempt made by CEOs and owners of large Bitcoin businesses to introduce changes to the currency's protocol and development cycle with ulterior motives.<ref>{{cite web|url=https://www.forbes.com/sites/ktorpey/2017/10/31/is-bitcoin-facing-a-corporate-takeover-via-the-2x-fork-a-developer-and-a-business-leader-debate/#11a821363bff|title=Is Bitcoin Facing A Corporate Takeover Via The '2x' Fork? A Developer And A Business Leader Debate|work=Forbes|author=Torpey, Kyle|date=October 31, 2017|accessdate=November 29, 2017}}</ref> | ||
Though over 80% of miners signaled intention for SegWit2x and the New York Agreement, it failed to gain any consensus among the community and Core developers. As it became clear that the execution of the fork would lead to a currency split, the address format was deliberately kept identical and no replay protection was implemented, which would have caused many BTC users to inadvertently use B2X. Additionally, code changes were made that allowed B2X nodes to pretend to be BTC nodes in order to connect and use P2P peers from the bitcoin network when synchronizing. Due to these qualities, many users considered B2X to be an outright attack on the bitcoin network, but its designers continued marketing it as an upgrade. | |||
== Cancellation and aftermath == | |||
== Cancellation == | |||
The SegWit2x hardfork was declared cancelled in a joint statement by six individuals.<ref>{{cite web|url=https://lists.linuxfoundation.org/pipermail/bitcoin-segwit2x/2017-November/000685.html|title=Segwit2x Final Steps|author=Belsche, Mike et al.|date=November 8, 2017}}</ref> In the following hours, the price of B2X futures (called BT2 on [[Bitfinex]]) dropped to 1% of the price of [[Bitcoin]] (BTC, called BT1 as a Bitfinex future). | The SegWit2x hardfork was declared cancelled in a joint statement by six individuals.<ref>{{cite web|url=https://lists.linuxfoundation.org/pipermail/bitcoin-segwit2x/2017-November/000685.html|title=Segwit2x Final Steps|author=Belsche, Mike et al.|date=November 8, 2017}}</ref> In the following hours, the price of B2X futures (called BT2 on [[Bitfinex]]) dropped to 1% of the price of [[Bitcoin]] (BTC, called BT1 as a Bitfinex future). | ||
Despite the cancellation, some parties intended to proceed with the hard fork.<ref>{{cite web|url=https://www.cryptocoinsnews.com/mysterious-group-bitpico-threatens-to-execute-segwit2x-hard-fork/|title=Mysterious Group BitPico Threatens to Execute the Bitcoin Hard Fork|work=Cryptocoins News|author=Wilmoth, Josiah|date=November 11, 2017|accessdate=November 29, 2017}}</ref> However, when the SegWit2x nodes split from the rest of the network on November 17, it was found that they had done so one block earlier than anticipated, at block 494782.<ref>{{cite web|url=https://www.coindesk.com/no-fork-no-fire-segwit2x-nodes-stall-running-abandoned-bitcoin-code/|title=No Fork, No Fire: Segwit2x Nodes Stall Running Abandoned Bitcoin Code|work=[[CoinDesk]]|author=Higgins, Stan|date=November 17, 2017|accessdate=November 29, 2017}}</ref> This was due to an [[wikipedia:off-by-one error|off-by-one error]] as a result of counting up from the [[genesis block]] instead of from block 1. After splitting off, SegWit2x nodes were then waiting for the first block of >1MB to begin the chain fork. But the protocol rules say that the block size increase does not occur until block 494784, so because block 494783 is both required to be at most 1 MB by the original rules and greater than 1 MB by the new rules, SegWit2x had come to a permanent standstill. | Despite the cancellation, some parties intended to proceed with the hard fork.<ref>{{cite web|url=https://www.cryptocoinsnews.com/mysterious-group-bitpico-threatens-to-execute-segwit2x-hard-fork/|title=Mysterious Group BitPico Threatens to Execute the Bitcoin Hard Fork|work=Cryptocoins News|author=Wilmoth, Josiah|date=November 11, 2017|accessdate=November 29, 2017}}</ref> However, when the SegWit2x nodes split from the rest of the network on November 17, it was found that they had done so one block earlier than anticipated, at block 494782.<ref name="cd">{{cite web|url=https://www.coindesk.com/no-fork-no-fire-segwit2x-nodes-stall-running-abandoned-bitcoin-code/|title=No Fork, No Fire: Segwit2x Nodes Stall Running Abandoned Bitcoin Code|work=[[CoinDesk]]|author=Higgins, Stan|date=November 17, 2017|accessdate=November 29, 2017}}</ref> This was due to an [[wikipedia:off-by-one error|off-by-one error]] as a result of counting up from the [[genesis block]] instead of from block 1. After splitting off, SegWit2x nodes were then waiting for the first block of >1MB to begin the chain fork. But the protocol rules say that the block size increase does not occur until block 494784, so because block 494783 is both required to be at most 1 MB by the original rules and greater than 1 MB by the new rules,{{citation needed}} SegWit2x had come to a permanent standstill.<ref name="cd"/> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 21:19, 29 November 2017
- Not to be confused with Segregated Witness, which is commonly abbreviated as SegWit.
SegWit2x, (abbreviated B2X or S2X, and originally called SegWit2Mb), was a failed contentious hardfork outlined in the New York Agreement that intended to double the block size limit. The hardfork has been denounced as an attempt made by CEOs and owners of large Bitcoin businesses to introduce changes to the currency's protocol and development cycle with ulterior motives.[1]
Though over 80% of miners signaled intention for SegWit2x and the New York Agreement, it failed to gain any consensus among the community and Core developers. As it became clear that the execution of the fork would lead to a currency split, the address format was deliberately kept identical and no replay protection was implemented, which would have caused many BTC users to inadvertently use B2X. Additionally, code changes were made that allowed B2X nodes to pretend to be BTC nodes in order to connect and use P2P peers from the bitcoin network when synchronizing. Due to these qualities, many users considered B2X to be an outright attack on the bitcoin network, but its designers continued marketing it as an upgrade.
Cancellation and aftermath
The SegWit2x hardfork was declared cancelled in a joint statement by six individuals.[2] In the following hours, the price of B2X futures (called BT2 on Bitfinex) dropped to 1% of the price of Bitcoin (BTC, called BT1 as a Bitfinex future).
Despite the cancellation, some parties intended to proceed with the hard fork.[3] However, when the SegWit2x nodes split from the rest of the network on November 17, it was found that they had done so one block earlier than anticipated, at block 494782.[4] This was due to an off-by-one error as a result of counting up from the genesis block instead of from block 1. After splitting off, SegWit2x nodes were then waiting for the first block of >1MB to begin the chain fork. But the protocol rules say that the block size increase does not occur until block 494784, so because block 494783 is both required to be at most 1 MB by the original rules and greater than 1 MB by the new rules,[citation needed] SegWit2x had come to a permanent standstill.[4]
References
- ↑ Torpey, Kyle (October 31, 2017). "Is Bitcoin Facing A Corporate Takeover Via The '2x' Fork? A Developer And A Business Leader Debate". Forbes. https://www.forbes.com/sites/ktorpey/2017/10/31/is-bitcoin-facing-a-corporate-takeover-via-the-2x-fork-a-developer-and-a-business-leader-debate/#11a821363bff. Retrieved November 29, 2017.
- ↑ Belsche, Mike et al. (November 8, 2017). "Segwit2x Final Steps". https://lists.linuxfoundation.org/pipermail/bitcoin-segwit2x/2017-November/000685.html.
- ↑ Wilmoth, Josiah (November 11, 2017). "Mysterious Group BitPico Threatens to Execute the Bitcoin Hard Fork". Cryptocoins News. https://www.cryptocoinsnews.com/mysterious-group-bitpico-threatens-to-execute-segwit2x-hard-fork/. Retrieved November 29, 2017.
- ↑ 4.0 4.1 Higgins, Stan (November 17, 2017). "No Fork, No Fire: Segwit2x Nodes Stall Running Abandoned Bitcoin Code". CoinDesk. https://www.coindesk.com/no-fork-no-fire-segwit2x-nodes-stall-running-abandoned-bitcoin-code/. Retrieved November 29, 2017.