Sigv4.mac: def of bend-kit-sigv4@0.11.0.1
Import: import bend-kit-sigv4@0.11.0.1/sigv4.bend as Sigv4
Lines 295-301 of bend-kit-sigv4@0.11.0.1/sigv4.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&start_line=295&end_line=301

import Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes

# HMAC-SHA256 of msg under the key k holds, or k's failure.
def mac(k: Result<&1, &1, U32 & String, U32 & Array<U32>>, +msg: String) -> IO(Result<&1, &1, U32 & String, U32 & Array<U32>>):
  match k:
    case Fail{e}:
      IO.pure(Result<&1, &1, U32 & String, U32 & Array<U32>>, Fail{e})
    case Done{(kn, kb)}:
      mac.words(kn, kb, Bytes.from_string(msg))

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=from_string
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=mac.words