No payment sheet has been initialized yet - ios

Question

main.dart
WidgetsFlutterBinding.ensureInitialized();
Stripe.publishableKey = stripePublishableKey;
Stripe.merchantIdentifier = 'emailID';
await Stripe.instance.applySettings();
Initiate Payment
Future<void> initPaymentSheet({
required String? price,
}) async {
try {
await Stripe.instance.initPaymentSheet(
paymentSheetParameters: SetupPaymentSheetParameters(
// Main params
paymentIntentClientSecret: clientSecret,
customerId: customerId,
customerEphemeralKeySecret: ephemeralKey,
// Merchant Name
merchantDisplayName: 'TEST',
// Extra params
applePay: const PaymentSheetApplePay(
merchantCountryCode: 'US',
),
googlePay: const PaymentSheetGooglePay(
merchantCountryCode: 'US',
testEnv: true,
),
style: ThemeMode.system,
),
);
} catch (e) {
rethrow;
}
}
/// Display the payment sheet.
Future<void> confirmPayment({required String price}) async {
try {
await initPaymentSheet(price: price);
// Present Payment sheet to user for payment
await Stripe.instance.presentPaymentSheet();
// Book the request.
bookingRequest();
} on Exception catch (e) {
if (e is StripeException) {
// displaySnackBar(
// 'Error!', 'Error from Stripe: ${e.error.localizedMessage}');
log('Error from Stripe: ${e.error.localizedMessage}');
print('Error from Stripe: ${e.error.localizedMessage}');
displaySnackBar('Error!', 'Something went wrong!, \nPlease try again.');
} else {
log('Error from Stripe: $e');
displaySnackBar('Error!', 'Something went wrong!, \nPlease try again.');
}
}
}
This confirmPayment() is called on Button click.
It will wait for Init the payment sheet.
After that presentPaymentSheet called to present the Payment sheet.
In Android, It's working fine.
In iOS, it's showing error like: No payment sheet has been initialized yet
Already Raised the Issue on the plugin Repo.
https://github.com/flutter-stripe/flutter_stripe/issues/850

Answer 1

✅ Solved:
Okay, the problem was in our backend response
when we were generating EphemeralKey, our backend dev was returning ephemeralKey["id"] instead of ephemeralKey["secret"] as a ephemeralKey.
I changed the EphemeralKey
from this
paymentIntentDTO.setEphemeralKey(ephemeralKey.getId());
to this
paymentIntentDTO.setClientSecret(paymentIntent.getClientSecret());
see ephemeralKey is different.
ephemeralKey["id"] is work fine in android app for stripe payment but on IOS ephemeralKey["id"] will not working
it was showing Error from Stripe: No payment sheet has been initialised yet
i changed ephemeralKey["id"] to ephemeralKey["secret"] as a ephemeralKey and now it working fine on both device.