def prefix_eq

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/ed25519/top.bend:170

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/ed25519.bend as SE
import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend as F
import bend-collections-laws-crypto@1.0.0.0/src/crypto/ed25519/ed25519.bend as E
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/ed25519/bytes.bend as BY

170def prefix_eq(+h: List<&2, U32>, +msg: List<&2, U32>) -> {E.cat(F.drop(32n, h), msg) == SE.cat(SE.rest(32n, h), msg) : List<&2, U32>}:
171  Equal.trans(List<&2, U32>, E.cat(F.drop(32n, h), msg), SE.cat(F.drop(32n, h), msg), SE.cat(SE.rest(32n, h), msg), BY.cat_eq(F.drop(32n, h), msg), Equal.cong(List<&2, U32>, List<&2, U32>, z => SE.cat(z, msg), F.drop(32n, h), SE.rest(32n, h), BY.drop_eq(32n, h)))