complete method

@override Future<void> complete(PurchaseUpdate update)

Acknowledges or completes provider delivery after Worker verification.

Implementations must be able to complete a reconstructed update from its durable evidence; retaining only an in-memory SDK object is insufficient. This method is never called for pending, cancelled, failed, or unverified updates.

Implementation

@override
Future<void> complete(PurchaseUpdate update) async {
  final token = update.evidence?['purchaseToken'];
  if (token is! String || token.isEmpty) {
    throw StateError(
      'A Play delivery cannot be settled without its purchase token.',
    );
  }
  // The live object when this run has seen it, and otherwise one rebuilt from
  // the token alone: an outbox entry written before a crash must still be
  // settleable, and Play's three-day refund does not wait for the stream to
  // re-deliver.
  await _billing.completePurchase(
    _live[token] ?? _reconstruct(update, token),
  );
  _live.remove(token);
}