def sign_k
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/secp256k1/schnorr.bend as Schnorrimport Base
146def sign_k(+one: Nat, +d: Nat, +pb: List<&2, U32>, +m: List<&2, U32>, +k0: Nat) -> Maybe<&2, List<&2, U32>>:
147 sign_kz(one, d, pb, m, k0, Nat.is_eq(k0, 0n))