From: Jeremy <jlrubin@mit•edu>
To: Bitcoin development mailing list <bitcoin-dev@lists•linuxfoundation.org>
Subject: [bitcoin-dev] Note on Sequence Lock Upgrades Defect
Date: Fri, 3 Sep 2021 20:32:19 -0700 [thread overview]
Message-ID: <CAD5xwhiKU1fuhqmKsx28f1nuw9CmvbyrS=BtM4X-L+WPgWY3Wg@mail.gmail.com> (raw)
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Hi Bitcoin Devs,
I recently noticed a flaw in the Sequence lock implementation with respect
to upgradability. It might be the case that this is protected against by
some transaction level policy (didn't see any in policy.cpp, but if not,
I've put up a blogpost explaining the defect and patching it
https://rubin.io/bitcoin/2021/09/03/upgradable-nops-flaw/
I've proposed patching it here https://github.com/bitcoin/bitcoin/pull/22871,
it is proper to widely survey the community before patching to ensure no
one is depending on the current semantics in any live application lest this
tightening of standardness rules engender a confiscatory effect.
Best,
Jeremy
--
@JeremyRubin <https://twitter.com/JeremyRubin>
<https://twitter.com/JeremyRubin>
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next reply other threads:[~2021-09-04 3:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-04 3:32 Jeremy [this message]
2021-09-05 3:19 ` Jeremy
2021-09-06 2:35 ` David A. Harding
2021-09-06 3:17 ` Jeremy
2021-09-06 6:16 ` darosior
2021-09-09 0:02 ` Antoine Riard
2021-09-09 1:04 ` Jeremy
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