Change Details

PR description: > This is in preparation for adding different signature verification rules, > specifically tapscript (BIP 342), which interprets opcode 0xac and 0xad > as Schnorr signature verifications. The rationale for backporting this PR into ABC is that extracting a small piece of a huge function into its own function seems positive in itself, even if we don't plan to do the next steps described in the PR discussion. This is a backport of Core PR18422

PR description: > This is in preparation for adding different signature verification rules, > specifically tapscript (BIP 342), which interprets opcode 0xac and 0xad > as Schnorr signature verifications. The rationale for backporting this PR into ABC is that extracting a small piece of a huge function into its own function seems positive in itself, even if we don't plan to do the next steps described in the PR discussion. This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/18422 | PR18422]]

PR description: > This is in preparation for adding different signature verification rules, > specifically tapscript (BIP 342), which interprets opcode 0xac and 0xad > as Schnorr signature verifications. The rationale for backporting this PR into ABC is that extracting a small piece of a huge function into its own function seems positive in itself, even if we don't plan to do the next steps described in the PR discussion. This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/18422 | PR18422]]