initialize method

Future<void> initialize({ List<String>? subscriptionIds, List<String>? productsIds, })

Implementation

Future<void> initialize({
  List<String>? subscriptionIds,
  List<String>? productsIds,
}) async {
  // Initialize the SubscriptionManager with subscription IDs & product ids.
  _subscriptionManager = SubscriptionManager(subscriptionIds ?? []);
  _productManager = ProductManager(productsIds ?? []);

  try {
    // Initialize the FlutterInappPurchase instance.
    final initResult = await FlutterInappPurchase.instance.initialize();
    // Log the initialization result.
    if (kDebugMode) {
      print(initResult ?? 'unknown');
    }
  } catch (e) {
    // Log any errors that occur during initialization.
    if (kDebugMode) {
      print(e.toString());
    }
  }

  // Listen for connection updates.
  _connectionSubscription =
      FlutterInappPurchase.connectionUpdated.listen((_) {});
  // Listen for purchase updates and handle them using the PurchaseHandler.
  _purchaseUpdatedSubscription = FlutterInappPurchase.purchaseUpdated
      .listen(_purchaseHandler.handlePurchaseUpdate);
  // Listen for purchase errors and notify error listeners.
  _purchaseErrorSubscription =
      FlutterInappPurchase.purchaseError.listen((error) {
    if (error != null) {
      // Notify error listeners with the error message.
      _listenerManager.notifyErrorListeners(
        purchaseError: error,
      );
    }
  });

  // Fetch subscription & products items.
  await Future.wait([
    _subscriptionManager.fetchSubscriptionItems(),
    _productManager.fetchProductItems(),
  ]);
}