I haven't studied the new proposal in depth, but my first impression is: Wouldn't it just be easier and better to just sign the entire "outputs" section of the PSBT?
The signature would cover every byte, and therefore would cover any future BIP additions to the outputs area, and also help non-multisig cases today. --- Peter D. Gray || Founder, Coinkite || Twitter: @dochex || GPG: A3A31BAD 5A2A5B10 _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev