Function unwrap

packages/server-e2e/src/envelope.ts:38–47

(envelope: Envelope<T>)

 * `null` — callers asking for a non-nullable type should narrow).
 */
export function unwrap<T>(envelope: Envelope<T>): T {
  if (envelope.code !== 0) throw new EnvelopeError(envelope);
  if (envelope.data === null) {
    // `code: 0 + data: null` is reserved for "no body" success envelopes; the
    // current server surface always returns a non-null data on success, so
    // surface this as a hard error rather than silently returning `null`.
    throw new EnvelopeError({ ...envelope, code: 50001, msg: 'success envelope had null data' });
  }
  return envelope.data;
}