Ios 在Flatter中使用restorePurchases查找已购买的订阅

我正在我的Flatter应用程序中使用

应用程序内购买：^1.0.1

，以实现订阅的应用程序内购买。我曾经成功地购买过一次订阅，但是当我尝试使用

restorepources（）

获取用户已经购买的订阅时，我会得到一个每次长度都会增加的列表。看起来有重复购买同一产品是不可能的

这是我的密码

_processIAP() async {
    Stream purchaseUpdated = InAppPurchase.instance.purchaseStream;
    _subscription = purchaseUpdated.listen((purchaseDetailsList) {
        print("purchaseDetailsList.length = " + purchaseDetailsList.length.toString());
        purchaseDetailsList.forEach((PurchaseDetails purchaseDetails) async {
        
        print(purchaseDetails.purchaseID + " " + purchaseDetails.pendingCompletePurchase.toString());

        if (purchaseDetails.status == PurchaseStatus.pending) {
            print("Purchase is still pending!");
        } else {
            if (purchaseDetails.status == PurchaseStatus.error) {
                print("An error has occurred!");
            } else if (purchaseDetails.status == PurchaseStatus.purchased || purchaseDetails.status == PurchaseStatus.restored) {
                print("Purchased or restored successfully!");

                await InAppPurchase.instance.completePurchase(purchaseDetails);
                print("Purchase marked as completed");
          }
          if (purchaseDetails.pendingCompletePurchase) {

                await InAppPurchase.instance.completePurchase(purchaseDetails);
                print("Purchase marked as completed");
          }
        }
      });
    }, onDone: () {
      print("DONE!");
      _subscription.cancel();
    }, onError: (error) {
      print(error);
    });

    const Set<String> _kIds = <String>{'basic_monthly_apple'};
    final ProductDetailsResponse response = await InAppPurchase.instance.queryProductDetails(_kIds);
    if (response.notFoundIDs.isNotEmpty) {
      print("Some product IDs not found!");
    }

    print("Restoring previous purchases!");
    await InAppPurchase.instance.restorePurchases();

    //PurchaseParam purchaseParam = PurchaseParam(productDetails: products[0]);
    // InAppPurchase.instance.buyNonConsumable(purchaseParam: purchaseParam);
}

每次我重新启动应用程序并重试时，长度6都会不断增加。此外，我不允许执行

buynconsummable

以及

restorepourchaes

。它会导致一个错误，指示需要标记为已完成的挂起事务

非常感谢您的帮助