Feature/Enhancement Request: `OP_CHECK_MULTISIG_STACK`

[k98kurz]

Feature or Enhancement?

• (x) New feature
• ( ) Enhancement of existing feature

Description

New op, OP_CHECK_MULTISIG_STACK, that behaves like OP_CHECK_MULTISIG and OP_CHECK_SIG_STACK:

• Read uint8 m and n from tape
• Pull n VerifyKeys from the stack
• Pull message from the stack
• Pull m signatures from the stack
• If the signatures validate against the keys, and each key produced only one signature, put True onto the stack; otherwise, put False onto the stack

Additional context

• Aliases: OP_CMSS and CMSS
• It might be useful to also add OP_CHECK_SIG_STACK_VERIFY and OP_CHECK_MULTISIG_STACK_VERIFY since all 4 uses of OP_CHECK_SIG_STACK in the tooling follow it with OP_VERIFY