{"type":"rich","version":"1.0","title":"Jeremy [ARCHIVE] wrote","author_name":"Jeremy [ARCHIVE] (npub1q8…8qwta)","author_url":"https://yabu.me/npub1q86n5vtxkwerzwfqza3hwls8pl8764244464talfqy2vpj0qaz6q38qwta","provider_name":"njump","provider_url":"https://yabu.me","html":"📅 Original date posted:2021-09-04\n📝 Original message:Hi Bitcoin Devs,\n\nI recently noticed a flaw in the Sequence lock implementation with respect\nto upgradability. It might be the case that this is protected against by\nsome transaction level policy (didn't see any in policy.cpp, but if not,\nI've put up a blogpost explaining the defect and patching it\nhttps://rubin.io/bitcoin/2021/09/03/upgradable-nops-flaw/\n\nI've proposed patching it here https://github.com/bitcoin/bitcoin/pull/22871,\nit is proper to widely survey the community before patching to ensure no\none is depending on the current semantics in any live application lest this\ntightening of standardness rules engender a confiscatory effect.\n\nBest,\n\nJeremy\n\n--\n@JeremyRubin \u003chttps://twitter.com/JeremyRubin\u003e\n\u003chttps://twitter.com/JeremyRubin\u003e\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20210903/1d2d16a4/attachment.html\u003e"}