Sigv4.fault.scan: def of bend-kit-sigv4@0.11.0.1
Import: import bend-kit-sigv4@0.11.0.1/sigv4.bend as Sigv4
Lines 813-821 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=813&end_line=821

import Base

# S3's <Error><Code>..</Code><Message>..</Message></Error>.
def fault.scan(ls: List<&2, Leaf>, code: String, msg: String) -> String & String:
  match ls:
    case Nil{}:
      (code, msg)
    case Con{Leaf{+p, +n, +x}, t}:
      +err = String.eq(p, "Error")
      fault.scan(t, Bool.pick(String, Bool.and(err, String.eq(n, "Code")), x, code),
        Bool.pick(String, Bool.and(err, String.eq(n, "Message")), x, msg))

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  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=String.eq
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=Leaf