fix!: return sealed CollectBankAccountResult from collectBankAccount / verifyMicrodeposits

example/lib/screens/regional_payment_methods/us_bank_account_direct_debit_screen.dart

@@ -134,10 +134,15 @@ class _UsBankAccountDirectDebitScreenState
           ),
         );
 
-        if (result.status == PaymentIntentsStatus.RequiresConfirmation) {
+        final paymentIntent = switch (result) {
+          CollectBankAccountPaymentIntentResult(:final paymentIntent) =>
+            paymentIntent,
+          CollectBankAccountSetupIntentResult() => null,
+        };
+        if (paymentIntent?.status == PaymentIntentsStatus.RequiresConfirmation) {
           setState(() {
             canConfirm = true;
-            clientSecretForConfirm = result.clientSecret;
+            clientSecretForConfirm = paymentIntent!.clientSecret;
           });
           if (context.mounted) {
             scaffoldMessenger.showSnackBar(

packages/stripe/lib/src/stripe.dart

@@ -632,8 +632,10 @@ class Stripe {
 
   /// Collect the bankaccount details for the payment intent.
   ///
-  /// Only US bank accounts are supported.
-  Future<PaymentIntent> collectBankAccount({
+  /// Only US bank accounts are supported. The returned
+  /// [CollectBankAccountResult] is a sealed union containing either a
+  /// [PaymentIntent] or a [SetupIntent] depending on [isPaymentIntent].
+  Future<CollectBankAccountResult> collectBankAccount({
     /// Whether the clientsecret is associated with setup or paymentintent
     required bool isPaymentIntent,
 
@@ -655,8 +657,10 @@ class Stripe {
   /// Verify the bank account with microtransactions
   ///
   /// Only US bank accounts are supported.This method is only implemented for
-  /// iOS at the moment.
-  Future<PaymentIntent> verifyPaymentIntentWithMicrodeposits({
+  /// iOS at the moment. The returned [CollectBankAccountResult] is a sealed
+  /// union containing either a [PaymentIntent] or a [SetupIntent] depending on
+  /// [isPaymentIntent].
+  Future<CollectBankAccountResult> verifyPaymentIntentWithMicrodeposits({
     /// Whether the clientsecret is associated with setup or paymentintent
     required bool isPaymentIntent,
 

packages/stripe_platform_interface/lib/src/method_channel_stripe.dart

@@ -15,6 +15,7 @@ import 'package:stripe_platform_interface/src/result_parser.dart';
 
 import 'models/app_info.dart';
 import 'models/card_details.dart';
+import 'models/collect_bank_account_result.dart';
 import 'models/errors.dart';
 import 'models/payment_intents.dart';
 import 'models/payment_methods.dart';
@@ -569,7 +570,7 @@ class MethodChannelStripe extends StripePlatform {
   }
 
   @override
-  Future<PaymentIntent> collectBankAccount({
+  Future<CollectBankAccountResult> collectBankAccount({
     required bool isPaymentIntent,
     required String clientSecret,
     required CollectBankAccountParams params,
@@ -583,13 +584,11 @@ class MethodChannelStripe extends StripePlatform {
 
     _financialConnectionsEventHandler = params.onEvent;
 
-    return ResultParser<PaymentIntent>(
-      parseJson: (json) => PaymentIntent.fromJson(json),
-    ).parse(result: result!, successResultKey: 'paymentIntent');
+    return CollectBankAccountResult.fromJson(result!);
   }
 
   @override
-  Future<PaymentIntent> verifyPaymentIntentWithMicrodeposits({
+  Future<CollectBankAccountResult> verifyPaymentIntentWithMicrodeposits({
     required bool isPaymentIntent,
     required String clientSecret,
     required VerifyMicroDepositsParams params,
@@ -601,9 +600,7 @@ class MethodChannelStripe extends StripePlatform {
           'clientSecret': clientSecret,
         });
 
-    return ResultParser<PaymentIntent>(
-      parseJson: (json) => PaymentIntent.fromJson(json),
-    ).parse(result: result!, successResultKey: 'paymentIntent');
+    return CollectBankAccountResult.fromJson(result!);
   }
 
   @override

packages/stripe_platform_interface/lib/src/models/collect_bank_account_result.dart

@@ -0,0 +1,38 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+import 'errors.dart';
+import 'payment_intents.dart';
+import 'setup_intent.dart';
+
+part 'collect_bank_account_result.freezed.dart';
+
+/// Result of `collectBankAccount` / `verifyPaymentIntentWithMicrodeposits`.
+///
+/// Native SDKs return either a payment intent or a setup intent depending on
+/// the client secret that was supplied, so the result is modelled as a sealed
+/// union to keep both flows strongly typed.
+@freezed
+sealed class CollectBankAccountResult with _$CollectBankAccountResult {
+  const factory CollectBankAccountResult.paymentIntent(
+    PaymentIntent paymentIntent,
+  ) = CollectBankAccountPaymentIntentResult;
+
+  const factory CollectBankAccountResult.setupIntent(SetupIntent setupIntent) =
+      CollectBankAccountSetupIntentResult;
+
+  /// Parses a native method-channel response into the matching variant, or
+  /// throws [StripeException] when neither key is present.
+  factory CollectBankAccountResult.fromJson(Map<String, dynamic> json) {
+    final payment = json['paymentIntent'];
+    if (payment is Map<String, dynamic>) {
+      return CollectBankAccountResult.paymentIntent(
+        PaymentIntent.fromJson(payment),
+      );
+    }
+    final setup = json['setupIntent'];
+    if (setup is Map<String, dynamic>) {
+      return CollectBankAccountResult.setupIntent(SetupIntent.fromJson(setup));
+    }
+    throw StripeException.fromJson(json);
+  }
+}