get-attachment-error

variant get-attachment-error {
  bad-request(string),
  unauthorized(string),
  payment-required(string),
  forbidden(string),
  not-found(string),
  failed-dependency(string),
  internal-server-error(string),
  not-implemented(string),
  service-unavailable(string),
  gateway-timeout(string),
  other(string),
}