BendCollections.checked: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/spec/crypto/keccak/main.bend as BendCollections
Lines 73-76 of bend-collections@1.0.0.0/spec/crypto/keccak/main.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/spec/crypto/keccak/main.bend&start_line=73&end_line=76

import Base

def checked(round_count: Nat, valid: Bool, a: Array<U32>, length: Nat) -> Maybe<&1,Array<U32>>:
  match valid:
    case False{}: None{}
    case True{}: Some{digest(unchecked(round_count,a,length))}

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/spec/crypto/keccak/main.bend&name=digest
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/spec/crypto/keccak/main.bend&name=unchecked