sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja
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<roconnor>
I recently noticed a peculiar behaviour in SIGHASH_SINGLE and SIGHASH_NONE where (non-taproot) signatures cover the locktime but not the sequence numbers. This means those signatures commit to the timelock value, but does not commit to whether the timelock is active or not.
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<aj>
roconnor: SINGLE with segwit v0 commits to the input's nsequence too, doesn't it?
<aj>
err, SINGLE and NONE
<roconnor>
oh am I misreading my notes?
<aj>
roconnor: hashSequence is cleared, but there's a separate commitment to the individual input's nSequence, if i'm not missing something
<roconnor>
I see that you are correct. Dmitry told me the same thing.
<roconnor>
I'm glad I brought this up, even though I'm wrong, otherwise I who knows how long I would have kept this incorrect idea in my head.
<aj>
roconnor: i think non-segwit sigs are okay too?
<aj>
roconnor: they can't all be winners^Wcatastrophic vulnerabilities
<roconnor>
yea, more careful reading of my notes says that this holds for non-seqwit signatures.
<roconnor>
segwit.
<roconnor>
BIP-143 was mostly careful about preserving signature semantics, with one small change to allow for floating SINGLE_ANYONECANPAY.
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