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| -rw-r--r-- | bip-0030.mediawiki | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/bip-0030.mediawiki b/bip-0030.mediawiki index bffd6df..888a576 100644 --- a/bip-0030.mediawiki +++ b/bip-0030.mediawiki @@ -1,8 +1,10 @@ +{{bip}} + <pre> BIP: 30 Title: Duplicate transactions Author: Pieter Wuille <pieter.wuille@gmail.com> - Status: Accepted + Status: Final Type: Standards Track Created: 22-02-2012 </pre> @@ -15,9 +17,9 @@ So far, the Bitcoin reference implementation always assumed duplicate transactio ==Specification== To counter this problem, the following network rule is introduced: -*Blocks are not allowed to contain a transaction whose hash matches that of an earlier transaction in the same chain, unless that earlier transaction was already fully spent before said block. +*Blocks are not allowed to contain a transaction whose identifier matches that of an earlier, not-fully-spent transaction in the same chain. -This rule is to be applied to all blocks whose timestamp is after march 15, 2012, 0:00 UTC (unix timestamp 1331769600). +This rule is to be applied to all blocks whose timestamp is after a point in time that is yet to be decided. ==Rationale== Whatever solution is used, the following law must be obeyed to guarantee sane behaviour: the set of usable @@ -40,8 +42,11 @@ The addition of this rule only makes some previously-valid blocks invalid. This ==Implementation== A patch for the reference client can be found on https://github.com/sipa/bitcoin/tree/nooverwritetx +This BIP was implemented in Commit [https://github.com/bitcoin/bitcoin/commit/a206b0ea12eb4606b93323268fc81a4f1f952531 Do not allow overwriting unspent transactions (BIP 30)] +There have been additional commits to refine the implementation of this BIP. + ==Acknowledgements== -Thanks to Russell O'Connor for finding and demonstrating this problem and helping test the patch, and to Ben Reeves for pointing out a few weaknesses in the implementation. +Thanks to Russell O'Connor for finding and demonstrating this problem, and helping test the patch. [[Category:Developer]] [[Category:Technical]] |