def sign_fin
import bend-collections-laws-crypto@1.0.0.0/src/crypto/secp256k1/schnorr.bend as Schnorrimport Base
120def sign_fin(+pb: List<&2, U32>, +m: List<&2, U32>, +sig: List<&2, U32>) -> Maybe<&2, List<&2, U32>>:
121 sign_ok(sig, verify(pb, m, sig))