Weikeng Chen

@delbonis @JeremyRubin Re: OP_LEFT/RIGHT/SUBSTR There are still values in OP_LEFT/RIGHT/SUBSTR. To emulate them with OP_CAT, one needs to provide a hint, and this takes space in the witness stack /...

It seems useful to use the ACM DOI URI for that paper mentioned above with the nonfunctional link: https://dl.acm.org/doi/10.1145/2810103.2813686 It is very likely to still work for ten more years....

I think it solves mostly. But do you want to keep this issue around as the discussion would be expansive?

This PR is ready.

Sources added.

Fixed. I incorrectly put the secq one in the secp. Now it is fixed. For secq I think that thread is the citation that we generally use when referring to...

I deleted the `secp256k1` branch as well. (@npwardberkeley Nick Ward's previous attempt)