text: """Utility code to work with GPG signed messages."""
  
  
  def get_payload_from_clearsigned_message(message: str) -> str:
      """
      Given a message in clearsign format removes signature and marker strings like
      -----BEGIN PGP SIGNATURE-----, -----BEGIN PGP SIGNED MESSAGE----- to extract
      the original payload.
  
      :param message: The message containing the signature and the payload.
      :return: Extracted payload as string. Calling code is responsible for
          converting it to proper data type.
      """
      lines = message.strip().split('\n')
  
      if len(lines) < 5 \
              or lines[0] != '-----BEGIN PGP SIGNED MESSAGE-----' \
              or lines[1].startswith('Hash:') is False:
          raise RuntimeError("Invalid message format, no --BEGIN PGP SIGNED MESSAGE-- header")
  
      start_idx = 3  # Payload starts from 3rd line in clearsigned messages
      end_idx = None
  
      for idx, line in enumerate(lines[3:]):
          if line.strip() == '-----BEGIN PGP SIGNATURE-----':
              end_idx = idx + start_idx
              break
  
      if end_idx is None:
          raise RuntimeError("Invalid message format, no --BEGIN PGP SIGNATURE-- section")
  
      return "\n".join(lines[start_idx: end_idx])
  