Flutter: storekit_duplicate_product_object. There is a pending transaction for the same product identifier

Issue

I am using in-app purchase official plugin. but when I am trying to purchase a subscription on iOS I'm seeing the following error:

Unhandled Exception: PlatformException(storekit_duplicate_product_object, There is a pending transaction for the same product identifier. Please either wait for it to be finished or finish it manually using `completePurchase` to avoid edge cases., {applicationUsername: null, requestData: null, quantity: 1, productIdentifier: in_app_test, simulatesAskToBuyInSandbox: false}, null)

I'm using version in_app_purchase: ^0.5.2 of the in_app_purchase package

The code where I'm calling this just looks like this:

   TextButton(
      child: Text(productDetails.price),
      style: flatButtonStyle,
      onPressed: () async {
        PurchaseParam purchaseParam = PurchaseParam(
            productDetails: productDetails,
            applicationUserName: null,
            sandboxTesting: false);
        if (productDetails.id == _kConsumableId) {
          _connection.buyConsumable(
              purchaseParam: purchaseParam,
              autoConsume: kAutoConsume || Platform.isIOS);
        } else {
          _connection.buyNonConsumable(
              purchaseParam: purchaseParam);

        }},
    )

Solution

please follow up on #60763

You can finishTransaction those transactions using SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper)

To avoid this error put the code below before buyNonConsumable and work:

var transactions = await SKPaymentQueueWrapper().transactions();
 transactions.forEach((skPaymentTransactionWrapper) {
    SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper);
});

Full example

TextButton(
  child: Text(productDetails.price),
  style: flatButtonStyle,
  onPressed: () async {
    PurchaseParam purchaseParam = PurchaseParam(
        productDetails: productDetails,
        applicationUserName: null,
        sandboxTesting: false);
    if (productDetails.id == _kConsumableId) {
      _connection.buyConsumable(
          purchaseParam: purchaseParam,
          autoConsume: kAutoConsume || Platform.isIOS);
    } else {
      _connection.buyNonConsumable(
          purchaseParam: purchaseParam);
      var transactions = await SKPaymentQueueWrapper().transactions();
      transactions.forEach((skPaymentTransactionWrapper) {
        SKPaymentQueueWrapper().finishTransaction(skPaymentTransactionWrapper);
      });
    }
  },
)

Answer source from siloebb's answer

Answered By - Paresh Mangukiya