Incremental.fold256: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/hash/incremental.bend as Incremental
Lines 199-205 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/hash/incremental.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/hash/incremental.bend&start_line=199&end_line=205

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/hash.bend as H

# The state after each chunk in turn.
def fold256(cs: List<&2, List<&2, U32>>, +q: Nat, st: H.Sha256State) -> H.Sha256State:
  match cs:
    case Nil{}:
      st
    case c <> ct:
      fold256(ct, q, H.step256(st, c, q))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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-laws-crypto@1.0.0.0/src/crypto/hash.bend&name=Sha256State
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/hash.bend&name=step256