Hi Antoine, On Sun, Jun 18, 2023 at 10:32 PM Antoine Riard <antoine.ri...@gmail.com> wrote:
> > * Opt-in annex (every input must commit to an annex even if its is > empty) -> make sure existing multi-party protocols remain unaffected > > By requiring every input to commit to an annex even if it is empty, do you > mean rejecting a transaction where the minimal annex with its 0x50 tag is > absent ? > No what I meant, and what was mentioned by Greg in a previous email, is that either none of the inputs have an annex, or all of them have one. So if you're part of a multi-party transaction and you don't commit to an annex, you can be sure that no version of that tx will appear where another signer surprises you with a potentially large annex. For future protocols that rely on the annex, everyone would need to opt-in by committing to an annex (which can be empty just to signal opt-in). Joost
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