Sigv4.canonical: def of bend-kit-sigv4@0.11.0.1
Import: import bend-kit-sigv4@0.11.0.1/sigv4.bend as Sigv4
Lines 252-256 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=252&end_line=256

import Base

# The canonical request. hs must hold every header to sign, host included. phash is the
# payload's lowercase hex SHA-256, or "UNSIGNED-PAYLOAD".
def canonical(+service: String, +method: String, +path: String, +q: String, +hs: List<&2, Sigma<&2, &2, String, _ => String>>, +phash: String) -> String:
  +h = headers(hs)
  method ++ "\n" ++ uri(service, path) ++ "\n" ++ query(q) ++ "\n" ++ lines(h) ++ "\n" ++ String.join(names(h), ";") ++ "\n" ++ phash

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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.append
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.join
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=headers
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=lines
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=names
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=query
  https://jend.leeeet.dev/definition.txt?path=bend-kit-sigv4@0.11.0.1/sigv4.bend&name=uri