Restore purchase not working in Flutter/Google Play

Question

I have implemented in app purchases (IAP) as per in_app_purchase package example

I am able to buy a product from the store (I only have one set up). But when it comes to testing "user has a new phone" scenario, the restore purchases does not seem to work. No error either.

I've implemented this in a provider pattern. Store connection is initialized like this:

_isStoreAvailable = await _inAppPurchase.isAvailable();

Purchasing is implemented this way:

 Future<void> initializePurchase() async {
      ProductDetailsResponse response =
          await _inAppPurchase.queryProductDetails(_productIds);
      if (response.notFoundIDs.isNotEmpty) {
        // Handle the error.
        print("not found product in store!)");
      } else {
        PurchaseParam purchaseParam = PurchaseParam(
          productDetails: response.productDetails.first,
        );
        _inAppPurchase.buyNonConsumable(purchaseParam: purchaseParam);
      }
  }

I listen for changes using this code:

  final Stream<List<PurchaseDetails>> purchaseUpdated =
        _inAppPurchase.purchaseStream;
    _subscription =
        purchaseUpdated.listen((List<PurchaseDetails> purchaseDetailsList) {
      _listenToPurchaseUpdated(purchaseDetailsList);
    }, onDone: () {
      _subscription.cancel();
    }, onError: (error) {
      print("listen error: $error");
    });

...and this

  Future<void> _listenToPurchaseUpdated(
      List<PurchaseDetails> purchaseDetailsList) async {
    for (final PurchaseDetails purchaseDetails in purchaseDetailsList) {
      if (purchaseDetails.status != PurchaseStatus.pending) {
        if (purchaseDetails.status == PurchaseStatus.error) {
          //handle error
        } else if (purchaseDetails.status == PurchaseStatus.purchased ||
            purchaseDetails.status == PurchaseStatus.restored) {

          setLicense(StoreLicenseStatus.paid);
          notifyListeners();

          if (purchaseDetails.pendingCompletePurchase) {
            await _inAppPurchase.completePurchase(purchaseDetails);
          }
        }
      }
    }
  }

User can request purchases to be restored using this code:

 Future<void> restorePurchases() async {
    await _inAppPurchase.restorePurchases();
  }

Everything except restore works. I can buy a product, clear data, and when I start the app again, if I try to buy, I get a message from the store "you already own this item". So the store recognizes that the product was already purchased, great! But when I click "restore" nothing happens.

Am I missing something here?

This is on an emulator (Pixel 4 API 32), also on a real device.

Answer 1

Exactly the same situation for me. Restore purchase doesn’t restore anything though I definitely have a purchase.

Additionally I have to mention that it works perfectly when I build the app locally (both debug and release modes), but the issue appears when I build it with CICD and put on Firebase App Distribution or Play Console Internal testing.

GitHub thread.