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)
[-- Attachment #1: Type: text/plain, Size: 751 bytes --]
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>
[-- Attachment #2: Type: text/html, Size: 2101 bytes --]
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 ` [bitcoin-dev] Note on Sequence Lock Upgrades Defect 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAD5xwhiKU1fuhqmKsx28f1nuw9CmvbyrS=BtM4X-L+WPgWY3Wg@mail.gmail.com' \
--to=jlrubin@mit.edu \
--cc=bitcoin-dev@lists.linuxfoundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox