Hardfork - Revision history

Ysangkok: another hard fork proposed by newbery

2019-08-19T18:35:29Z

another hard fork proposed by newbery

← Older revision		Revision as of 18:35, 19 August 2019
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	* Due to a BerkeleyDB issue, Bitcoin pre-0.8 hardforked, and there was a chain split. This happened in 2013, before the foundation of Bitcoin Core. The post mortem is in [https://github.com/bitcoin/bips/blob/master/bip-0050.mediawiki BIP 0050].		* Due to a BerkeleyDB issue, Bitcoin pre-0.8 hardforked, and there was a chain split. This happened in 2013, before the foundation of Bitcoin Core. The post mortem is in [https://github.com/bitcoin/bips/blob/master/bip-0050.mediawiki BIP 0050].
	* Bitcoin Core 0.15 accidentally hardforked. See [https://bitcoincore.org/en/2018/09/20/notice/ CVE-2018-17144 full disclosure]. The fix was a softfork deployed in v0.16.3. There was no chain split.		* Bitcoin Core 0.15 accidentally hardforked. See [https://bitcoincore.org/en/2018/09/20/notice/ CVE-2018-17144 full disclosure]. The fix was a softfork deployed in v0.16.3. There was no chain split.

			In August 2019, John Newbery proposed another hardfork to bury CSV and segwit activation.[https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-August/017268.html]

	==See Also==		==See Also==
	* [[Softfork]]		* [[Softfork]]

Ysangkok: two accidental hardforks

2018-09-21T14:22:11Z

two accidental hardforks

← Older revision		Revision as of 14:22, 21 September 2018
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	This is known as a [[softfork]].		This is known as a [[softfork]].

	~~To date,~~ Bitcoin has ~~never deployed a hardfork~~, ~~but some~~ altcoins have.		Bitcoin Core has had two accidental hardforks, and many altcoins have had intended hardforks.

			The accidental hardforks are:

			* Due to a BerkeleyDB issue, Bitcoin pre-0.8 hardforked, and there was a chain split. This happened in 2013, before the foundation of Bitcoin Core. The post mortem is in [https://github.com/bitcoin/bips/blob/master/bip-0050.mediawiki BIP 0050].
			* Bitcoin Core 0.15 accidentally hardforked. See [https://bitcoincore.org/en/2018/09/20/notice/ CVE-2018-17144 full disclosure]. The fix was a softfork deployed in v0.16.3. There was no chain split.

	==See Also==		==See Also==
	* [[Softfork]]		* [[Softfork]]

Taras at 01:23, 30 November 2017

2017-11-30T01:23:00Z

← Older revision		Revision as of 01:23, 30 November 2017
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	A hardfork is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.		A '''hardfork''' is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.

	Any alteration to bitcoin which changes the block structure (including block hash), difficulty rules, or increases the set of valid transactions is a hardfork.		Any alteration to bitcoin which changes the block structure (including block hash), difficulty rules, or increases the set of valid transactions is a hardfork.
	However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.		However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.
	This is known as a [[softfork]], ~~and how [[P2SH]] was added to~~ Bitcoin.		This is known as a [[softfork]].

			To date, Bitcoin has never deployed a hardfork, but some altcoins have.

	==See Also==		==See Also==
	* [[Softfork]]		* [[Softfork]]

Sgornick: Add See Also subsection and move Softfork as an entry into it.

2016-01-13T13:23:04Z

Add See Also subsection and move Softfork as an entry into it.

← Older revision		Revision as of 13:23, 13 January 2016
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	~~{{seealso\|Softfork}}~~
	A hardfork is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.		A hardfork is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.

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	However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.		However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.
	This is known as a [[softfork]], and how [[P2SH]] was added to Bitcoin.		This is known as a [[softfork]], and how [[P2SH]] was added to Bitcoin.

			==See Also==
			* [[Softfork]]

Taras at 03:39, 16 January 2015

2015-01-16T03:39:27Z

← Older revision		Revision as of 03:39, 16 January 2015
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			{{seealso\|Softfork}}
	A hardfork is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.		A hardfork is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.

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	However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.		However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.
	This is known as a [[softfork]], and how [[P2SH]] was added to Bitcoin.		This is known as a [[softfork]], and how [[P2SH]] was added to Bitcoin.

	~~See also: [[Softfork]]~~

Luke-jr: Elaborate

2014-03-23T23:16:30Z

Elaborate

← Older revision		Revision as of 23:16, 23 March 2014
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	A ~~Hardfork~~ is a change to the bitcoin protocol that requires all users upgrade.		A hardfork is a change to the bitcoin protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade.

	Any alteration to bitcoin which changes the block structure (including block hash), difficulty rules, or increases the set of valid transactions is a hardfork. However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules. This is how [[P2SH]] was added to Bitcoin.		Any alteration to bitcoin which changes the block structure (including block hash), difficulty rules, or increases the set of valid transactions is a hardfork.
			However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules.
			This is known as a [[softfork]], and how [[P2SH]] was added to Bitcoin.

	See also: [[Softfork]]		See also: [[Softfork]]

Eldentyrell at 17:54, 22 March 2014

2014-03-22T17:54:43Z

← Older revision		Revision as of 17:54, 22 March 2014
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	A Hardfork is a change to the bitcoin protocol that requires all users upgrade.		A Hardfork is a change to the bitcoin protocol that requires all users upgrade.

	Any alteration to bitcoin which increases the set of valid transactions is a hardfork. However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules. This is how [[P2SH]] was added to Bitcoin.		Any alteration to bitcoin which changes the block structure (including block hash), difficulty rules, or increases the set of valid transactions is a hardfork. However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules. This is how [[P2SH]] was added to Bitcoin.

	See also: [[Softfork]]		See also: [[Softfork]]

Eldentyrell: Created page with "A Hardfork is a change to the bitcoin protocol that requires all users upgrade. Any alteration to bitcoin which increases the set of valid transactions is a hardfork. Howeve..."

2014-03-22T17:44:00Z

Created page with "A Hardfork is a change to the bitcoin protocol that requires all users upgrade. Any alteration to bitcoin which increases the set of valid transactions is a hardfork. Howeve..."

New page

A Hardfork is a change to the bitcoin protocol that requires all users upgrade.

Any alteration to bitcoin which increases the set of valid transactions is a hardfork. However, some of these changes can be implemented by having the new transaction appear to older clients as a pay-to-anybody transaction (of a special form), and getting the miners to agree to reject blocks including the pay-to-anybody transaction unless the transaction validates under the new rules. This is how [[P2SH]] was added to Bitcoin.

See also: [[Softfork]]