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11:39 < Ademan_> is there anything obviously wrong with modifying BIP-32 to replace ser_32(i) with ser_256(sha256(data_commitment)) ? I assume someone's proposed something like this already, so either I suck at searching (I do) or there's a good reason not to do this, or there's a better way to do this?
11:41 < sipa> what are you trying to achieve?
11:43 < sipa> there's nothing wrong with it, but BIP32 is intended to construct enumerable paths, not arbitrary commitments
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12:27 < Ademan_> It's basically down to simplifying mapping my use case onto BIP-32 but I probably should give it some more thought before I drag anyone further down that road with me...
12:31 < sipa> perhaps all you need is a p2c construction, like BIP341's
12:31 < sipa> (P + H(P || commitment)*G)
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19:13 < jeremyrubin> Ademan_ i have a function for you
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19:13 < jeremyrubin> https://github.com/sapio-lang/sapio/blob/19338013099bbae531846636f24bf15562158d17/ctv_emulators/src/lib.rs#L54
19:14 < jeremyrubin> Users generate a transaction T and extract the CheckTemplateVerify hash H for
19:14 < jeremyrubin> it. They then take H and convert it into a derivation path D of 8 u32's and 1
19:14 < jeremyrubin> u8 for non-hardened derivation (see `hash_to_child_vec`).
19:14 < jeremyrubin> This derivation path is then applied to K to generate a key C. This key is
19:14 < jeremyrubin> added with a CheckSig(SIGHASH_ALL) to the script in place of a CTV clause.
19:15 < jeremyrubin> hope that helps! I'd recommend using this sort of method because it's compatible with existing signing devices.
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20:45 < Ademan> jeremyrubin: thanks! makes sense, I hadn't considered the compatibility aspect :x
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--- Log closed Fri Nov 15 00:00:01 2024