confirmPayment.dart

  confirmPayment() async {
    try {
      setState(() {
        isLoading = true;
      });
      HttpsCallable callable =
          FirebaseFunctions.instance.httpsCallable('stripePayment');
      var serverData = await callable.call({'amount': 1000});
      Logger().d(serverData.data);
      if (serverData?.data == null) {
        showSnackBar(context, null, 'Error Processing Payment');
        setState(() {
          isLoading = false;
        });
        return;
      }
      String payIntent = serverData.data['client_secret'];

      await Stripe.instance.initPaymentSheet(
          paymentSheetParameters: SetupPaymentSheetParameters(
        applePay: false,
        googlePay: true,
        style: ThemeMode.light,
        testEnv: true,
        merchantCountryCode: 'CA',
        merchantDisplayName: AppCache.getUser.name,
        customerId: AppCache.getUser.uid,
        paymentIntentClientSecret: payIntent,
      ));

      await Stripe.instance.presentPaymentSheet();
      Logger().d('a');

      if (payIntent != null) {
        setState(() {
          isLoading = false;
        });
        Logger().d('payment made');

      } else {
        setState(() {
          isLoading = false;
        });
        showSnackBar(context, null, serverData.data['message']);
      }
    } on FirebaseFunctionsException catch (e) {
      Logger().d(e);
      setState(() {
        isLoading = false;
      });
      showSnackBar(context, null, e.message);
    } on PlatformException catch (e) {
      Logger().d(e);
      setState(() {
        isLoading = false;
      });
      showSnackBar(context, null, e.message);
    } on StripeException catch (e) {
      Logger().d(e);
      setState(() {
        isLoading = false;
      });
      showSnackBar(context, null, e.error.message);
    } catch (e) {
      Logger().d(e);

      setState(() {
        isLoading = false;
      });
      showSnackBar(context, null, e);
    }
  }