Sha.extension: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/spec/crypto/sha.bend as Sha
Lines 98-104 of bend-collections@1.0.0.0/spec/crypto/sha.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/spec/crypto/sha.bend&start_line=98&end_line=104

import Base

def extension(rounds: Nat, +history: List<&2, U32>) -> List<&2, U32>:
  match rounds:
    case 0n:
      Nil{}
    case 1n+p:
      +w = recurrence(history)
      w <> extension(p, w <> history)

Uses (4):
  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@1.0.0.0/spec/crypto/sha.bend&name=recurrence