Hi Ethan,<br /><br />Very good to see your OP_CAT design is now on the mailing list.<br /><br />Inside the BIP text, you mention that a sufficiently large OP_CAT script can "support tree signatures with a thousand public keys." I think it would be more useful to put the theoretical limit there, as it is buried along with the rest of the data on tree signatures inside the reference link to Blockstream's web page, which could go stale for whatever reason.<br /><br />On a further note, if there are enough practical uses for tree signatures, we could make it into a fully fledged BIP too, instead of just something cool that would make the Stacker News front page.<br /><br />- Ali<br /><br /><div><div dir="auto">On Tuesday, April 16, 2024 at 7:21:22 PM UTC Ethan Heilman wrote:<br /></div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr">Hi everyone,<br /><br />We've recently made a number of updates to the OP_CAT BIP proposal including adding a rationale section, an expanded backwards compatibility section and an updated reference implementation.<br /><br />It can be found as a PR to the bitcoin/bips repo here: <br /><a href="https://github.com/bitcoin/bips/pull/1525" target="_blank" rel="nofollow">https://github.com/bitcoin/bips/pull/1525</a><br />or as BINANA BIN-2024-0001: <br /><a href="https://github.com/bitcoin-inquisition/binana/blob/master/2024/BIN-2024-0001.md" target="_blank" rel="nofollow">https://github.com/bitcoin-inquisition/binana/blob/master/2024/BIN-2024-0001.md</a><br /><br />Thanks,<br />Ethan<br /><br /></div>
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