def checked

bend-collections@1.0.0.0 · src/crypto/sha/packed/packed.bend:179

import Base
import bend-collections@1.0.0.0/src/crypto/sha/state.bend as S

179def checked(valid: Bool, a: Array<U32>, length: Nat) -> Maybe<&2,S.State>:
180  match valid:
181    case False{}: None{}
182    case True{}: Some{hash_unchecked(a,length)}