[Flutter] Add trail period in flutter stripe. When i added parameter traildays in...

Add trial period in flutter stripe. When i added parameter trial days in createPaymentIntend than successfuly payment without stripe take card details Expectation is when i clicked to payment a payment sheet will open and take card details and save and enable subscription with trial period but amount can't be cut , amount will cut automatically after trial period end.

Future<void> makePayment(String paymentAmount, int index, BuildContext context) async {
final signupProvider = Provider.of<SignUpProvider>(context, listen: false);
final sp = Provider.of<SettingsProvider>(context, listen: false);

final currentUser = FirebaseAuth.instance.currentUser;
print("==== make payment");
if (currentUser == null) {
throw Exception("User not logged in");
}

try {
// Show loading indicator
signupProvider.changeLoaderValue(true);

// Fetch user info from Firebase
var userModel = await getCurrentUserInfo();
String? customerId = userModel!.stripeCustomerId;
String? stripeSubscriptionId = userModel!.stripeCustomerId;
sp.updatePreSubs(stripeSubscriptionId??"");
// print("==== created");
if (customerId == null || customerId.isEmpty) {
// Create Stripe customer
var createCustomerResponse = await StripeBackendService.createCustomer(
userModel!.email,
userModel.name,
currentUser.uid,
);

if (createCustomerResponse.statusCode == 201) {
var decodedResponse = json.decode(createCustomerResponse.body);
customerId = decodedResponse['customerId'];
await updateUserInFirebase(customerId);
print("==== created");

} else {
signupProvider.changeLoaderValue(false);
print("==== faild to create stripe customer");
throw Exception("Failed to create Stripe customer");
}
}

String? subscriptionId = userModel?.stripeSubscriptionId;
// Await the subscription creation and check for a valid response
Map<String, dynamic>? paymentIntent = await createSubscriptionIntent(
sp.subscriptions[index]['priceId'],
customerId!,
);

signupProvider.changeLoaderValue(false);
print('=============== ${paymentIntent!.containsKey('client_secret')}');
// Check if paymentIntent contains a valid client_secret
if (paymentIntent == null || !paymentIntent.containsKey('client_secret')) {
throw Exception("${AppLocale.paymentProcessFailed.getString(context)}");
}

// Initialize Payment Sheet
var gpay = const PaymentSheetGooglePay(
merchantCountryCode: "US",
currencyCode: "EUR", // Use the correct currency code here
testEnv: false,
);

await Stripe.instance.initPaymentSheet(
paymentSheetParameters: SetupPaymentSheetParameters(
customerId: customerId,
paymentIntentClientSecret: paymentIntent['client_secret'],
style: ThemeMode.dark,
merchantDisplayName: 'Ivan Stefina',
billingDetailsCollectionConfiguration: const BillingDetailsCollectionConfiguration(
name: CollectionMode.always,
phone: CollectionMode.always,
email: CollectionMode.always,
address: AddressCollectionMode.automatic,
),
googlePay: gpay,
),
);

// Display the payment sheet to the user
displayPaymentSheet(index, context);
} catch (e) {
signupProvider.changeLoaderValue(false);
print('Error: $e');
}
}

Future<void> displayPaymentSheet(int index, BuildContext context) async {
final sp = Provider.of<SettingsProvider>(context, listen: false);
final signupProvider = Provider.of<SignUpProvider>(context, listen: false);

try {
await Stripe.instance.presentPaymentSheet().then((value) async {

await cancelSubscription(context);

// Process successful payment here
signupProvider.changeLoaderValue(true);

sp.saveAndStoreUserSubscription(
context,
sp.subscriptions[index]['title'],
double.parse(sp.subscriptions[index]['subscriptionCharges']),
sp.subscriptions[index]['duration'],
sp.subscriptions[index]['freeTrailDays'],
);

// await signupProvider.notifyAdmin(
// FirebaseAuth.instance.currentUser!.uid,
// "newSubscription",
// "${AppLocale.newSubscription.getString(context)}",
// "${AppLocale.newSubscriptionpurchased.getString(context)}",
// );
});

signupProvider.changeLoaderValue(false);
} catch (e) {
signupProvider.changeLoaderValue(false);
print('Payment Sheet Error: $e');
}
}

// Correct return type should be Future<Map<String, dynamic>?>
Future<Map<String, dynamic>?> createSubscriptionIntent(String priceId, String customerId) async {
// Get current time in seconds since epoch
int? trialEnd;
int currentTime = DateTime.now().millisecondsSinceEpoch ~/ 1000;
// Calculate trial end time
trialEnd = currentTime + (2 * 24 * 60 * 60); // Convert days to seconds

try {
Map<String, dynamic> body = {
'customer': customerId,
'items[0][price]': priceId,
// 'trial_end': trialEnd.toString(),
'payment_behavior': 'default_incomplete',
'expand[]': 'latest_invoice.payment_intent',
};

var response = await http.post(
Uri.parse('https://api.stripe.com/v1/subscriptions'),
headers: {
'Authorization': 'Bearer $key', // Replace with your Stripe Secret Key
'Content-Type': 'application/x-www-form-urlencoded',
},
body: body,
);

var jsonResponse = json.decode(response.body);
print('Subscription Response: $jsonResponse');

if (jsonResponse.containsKey('latest_invoice')) {
var paymentIntent = jsonResponse['latest_invoice']['payment_intent'];
if (paymentIntent != null && paymentIntent.containsKey('client_secret')) {
print('Subscription Response: retrun ');

return paymentIntent; // Return the payment intent as a Map
} else {
throw Exception("Invalid subscription response: missing payment intent");
}
} else {
throw Exception("Invalid server response: missing invoice");
}
} catch (e) {
print('Error creating subscription: $e');
throw e;
}
}


Add trial period in flutter stripe. Expectation is when i clicked to payment a payment sheet will open and take card details and save and enable subscription with trial period but amount can't be cut , amount will cut automatically after trial period end.

Continue reading...