diff --git a/packages/in_app_purchase/in_app_purchase_storekit/CHANGELOG.md b/packages/in_app_purchase/in_app_purchase_storekit/CHANGELOG.md
index 1fa6e393bca..d30e38e9260 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/CHANGELOG.md
+++ b/packages/in_app_purchase/in_app_purchase_storekit/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.6+1
+
+* Refactors internals for improved testability.
+
 ## 0.4.6
 
 * Adds a new case `.unverified` to enum `SK2ProductPurchaseResult`
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/in_app_purchase_apis.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/in_app_purchase_apis.dart
new file mode 100644
index 00000000000..0895118a20f
--- /dev/null
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/in_app_purchase_apis.dart
@@ -0,0 +1,39 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/foundation.dart' show visibleForTesting;
+
+import 'messages.g.dart';
+import 'sk2_pigeon.g.dart';
+
+/// The instance of the host API used to communicate with the platform side for
+/// the original StoreKit API.
+///
+/// This is a global to allow tests to override the host API with a mock, since
+/// in practice the host API is a singleton, and there is no way to inject it
+/// in the usual way since many uses aren't in objects.
+InAppPurchaseAPI hostApi = InAppPurchaseAPI();
+
+/// The instance of the host API used to communicate with the platform side
+/// for StoreKit2.
+///
+/// This is a global to allow tests to override the host API with a mock, since
+/// in practice the host API is a singleton, and there is no way to inject it
+/// in the usual way since many uses aren't in objects.
+InAppPurchase2API hostApi2 = InAppPurchase2API();
+
+/// Set up pigeon API.
+@visibleForTesting
+void setInAppPurchaseHostApis({
+  InAppPurchaseAPI? api,
+  InAppPurchase2API? api2,
+}) {
+  if (api != null) {
+    hostApi = api;
+  }
+
+  if (api2 != null) {
+    hostApi2 = api2;
+  }
+}
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_appstore_wrapper.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_appstore_wrapper.dart
index 07a806d268c..8bfc8e47893 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_appstore_wrapper.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_appstore_wrapper.dart
@@ -2,9 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import '../../store_kit_2_wrappers.dart';
-
-InAppPurchase2API _hostApi = InAppPurchase2API();
+import '../in_app_purchase_apis.dart';
 
 /// Wrapper for StoreKit2's AppStore
 /// (https://developer.apple.com/documentation/storekit/appstore)
@@ -13,7 +11,7 @@ final class AppStore {
   /// Returns a bool that indicates whether the person can make purchases.
   /// https://developer.apple.com/documentation/storekit/appstore/3822277-canmakepayments
   Future<bool> canMakePayments() {
-    return _hostApi.canMakePayments();
+    return hostApi2.canMakePayments();
   }
 
   /// Dart wrapper for StoreKit2's sync()
@@ -21,6 +19,6 @@ final class AppStore {
   /// Will initiate an authentication pop up.
   /// https://developer.apple.com/documentation/storekit/appstore/sync()
   Future<void> sync() {
-    return _hostApi.sync();
+    return hostApi2.sync();
   }
 }
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_product_wrapper.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_product_wrapper.dart
index 4a0ba1de4e9..8baffa75743 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_product_wrapper.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_product_wrapper.dart
@@ -5,8 +5,7 @@
 import 'package:flutter/services.dart';
 
 import '../../store_kit_2_wrappers.dart';
-
-InAppPurchase2API _hostApi = InAppPurchase2API();
+import '../in_app_purchase_apis.dart';
 
 /// A wrapper around StoreKit2's ProductType
 /// https://developer.apple.com/documentation/storekit/product/producttype
@@ -381,7 +380,7 @@ class SK2Product {
   /// If any of the identifiers are invalid or can't be found, they are excluded
   /// from the returned list.
   static Future<List<SK2Product>> products(List<String> identifiers) async {
-    final List<SK2ProductMessage?> productsMsg = await _hostApi.products(
+    final List<SK2ProductMessage?> productsMsg = await hostApi2.products(
       identifiers,
     );
     if (productsMsg.isEmpty && identifiers.isNotEmpty) {
@@ -406,9 +405,9 @@ class SK2Product {
   }) async {
     SK2ProductPurchaseResultMessage result;
     if (options != null) {
-      result = await _hostApi.purchase(id, options: options.convertToPigeon());
+      result = await hostApi2.purchase(id, options: options.convertToPigeon());
     } else {
-      result = await _hostApi.purchase(id);
+      result = await hostApi2.purchase(id);
     }
     return result.convertFromPigeon();
   }
@@ -416,7 +415,7 @@ class SK2Product {
   /// Checks if the user is eligible for an introductory offer.
   /// The product must be an auto-renewable subscription.
   static Future<bool> isIntroductoryOfferEligible(String productId) async {
-    final bool result = await _hostApi.isIntroductoryOfferEligible(productId);
+    final bool result = await hostApi2.isIntroductoryOfferEligible(productId);
 
     return result;
   }
@@ -426,7 +425,7 @@ class SK2Product {
     String productId,
     String offerId,
   ) async {
-    final bool result = await _hostApi.isWinBackOfferEligible(
+    final bool result = await hostApi2.isWinBackOfferEligible(
       productId,
       offerId,
     );
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_storefront_wrapper.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_storefront_wrapper.dart
index aed8f12d90b..7d2215d1e65 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_storefront_wrapper.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_storefront_wrapper.dart
@@ -2,9 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import '../../store_kit_2_wrappers.dart';
-
-InAppPurchase2API _hostApi = InAppPurchase2API();
+import '../in_app_purchase_apis.dart';
 
 /// Wrapper for StoreKit2's Storefront
 /// (https://developer.apple.com/documentation/storekit/storefront)
@@ -13,6 +11,6 @@ final class Storefront {
   /// Returns the 3 letter code for a store's locale
   /// (https://developer.apple.com/documentation/storekit/storefront/countrycode)
   Future<String> countryCode() async {
-    return _hostApi.countryCode();
+    return hostApi2.countryCode();
   }
 }
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_transaction_wrapper.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_transaction_wrapper.dart
index f8359c85400..bc09ff5c96f 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_transaction_wrapper.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_2_wrappers/sk2_transaction_wrapper.dart
@@ -8,10 +8,9 @@ import 'package:in_app_purchase_platform_interface/in_app_purchase_platform_inte
 
 import '../../in_app_purchase_storekit.dart';
 import '../../store_kit_wrappers.dart';
+import '../in_app_purchase_apis.dart';
 import '../sk2_pigeon.g.dart';
 
-InAppPurchase2API _hostApi = InAppPurchase2API();
-
 /// Dart wrapper around StoreKit2's [Transaction](https://developer.apple.com/documentation/storekit/transaction)
 /// Note that in StoreKit2, a Transaction encompasses the data contained by
 /// SKPayment and SKTransaction in StoreKit1
@@ -72,14 +71,14 @@ class SK2Transaction {
   /// Indicates to the App Store that the app delivered the purchased content
   /// or enabled the service to finish the transaction.
   static Future<void> finish(int id) async {
-    await _hostApi.finish(id);
+    await hostApi2.finish(id);
   }
 
   /// A wrapper around [Transaction.all]
   /// https://developer.apple.com/documentation/storekit/transaction/3851203-all
   /// A sequence that emits all the customer’s transactions for your app.
   static Future<List<SK2Transaction>> transactions() async {
-    final List<SK2TransactionMessage> msgs = await _hostApi.transactions();
+    final List<SK2TransactionMessage> msgs = await hostApi2.transactions();
     final List<SK2Transaction> transactions = msgs
         .map((SK2TransactionMessage e) => e.convertFromPigeon())
         .toList();
@@ -89,17 +88,17 @@ class SK2Transaction {
   /// Start listening to transactions.
   /// Call this as soon as you can your app to avoid missing transactions.
   static void startListeningToTransactions() {
-    _hostApi.startListeningToTransactions();
+    hostApi2.startListeningToTransactions();
   }
 
   /// Stop listening to transactions.
   static void stopListeningToTransactions() {
-    _hostApi.stopListeningToTransactions();
+    hostApi2.stopListeningToTransactions();
   }
 
   /// Restore previously completed purchases.
   static Future<void> restorePurchases() async {
-    await _hostApi.restorePurchases();
+    await hostApi2.restorePurchases();
   }
 }
 
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.dart
index b413523eb00..4a8a5728d39 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.dart
@@ -11,19 +11,12 @@ import 'package:json_annotation/json_annotation.dart';
 
 import '../../store_kit_wrappers.dart';
 import '../channel.dart';
+import '../in_app_purchase_apis.dart';
 import '../in_app_purchase_storekit_platform.dart';
 import '../messages.g.dart';
 
 part 'sk_payment_queue_wrapper.g.dart';
 
-InAppPurchaseAPI _hostApi = InAppPurchaseAPI();
-
-/// Set up pigeon API.
-@visibleForTesting
-void setInAppPurchaseHostApi(InAppPurchaseAPI api) {
-  _hostApi = api;
-}
-
 /// A wrapper around
 /// [`SKPaymentQueue`](https://developer.apple.com/documentation/storekit/skpaymentqueue?language=objc).
 ///
@@ -54,12 +47,12 @@ class SKPaymentQueueWrapper {
   ///
   /// Returns `null` if the user's device is below iOS 13.0 or macOS 10.15.
   Future<SKStorefrontWrapper?> storefront() async {
-    return SKStorefrontWrapper.convertFromPigeon(await _hostApi.storefront());
+    return SKStorefrontWrapper.convertFromPigeon(await hostApi.storefront());
   }
 
   /// Calls [`-[SKPaymentQueue transactions]`](https://developer.apple.com/documentation/storekit/skpaymentqueue/1506026-transactions?language=objc).
   Future<List<SKPaymentTransactionWrapper>> transactions() async {
-    final List<SKPaymentTransactionMessage?> pigeonMsgs = await _hostApi
+    final List<SKPaymentTransactionMessage?> pigeonMsgs = await hostApi
         .transactions();
     return pigeonMsgs
         .map(
@@ -70,7 +63,7 @@ class SKPaymentQueueWrapper {
   }
 
   /// Calls [`-[SKPaymentQueue canMakePayments:]`](https://developer.apple.com/documentation/storekit/skpaymentqueue/1506139-canmakepayments?language=objc).
-  static Future<bool> canMakePayments() async => _hostApi.canMakePayments();
+  static Future<bool> canMakePayments() async => hostApi.canMakePayments();
 
   /// Sets an observer to listen to all incoming transaction events.
   ///
@@ -89,7 +82,7 @@ class SKPaymentQueueWrapper {
   /// Call this method when the first listener is subscribed to the
   /// [InAppPurchaseStoreKitPlatform.purchaseStream].
   Future<void> startObservingTransactionQueue() =>
-      _hostApi.startObservingPaymentQueue();
+      hostApi.startObservingPaymentQueue();
 
   /// Instructs the iOS implementation to remove the transaction observer and
   /// stop listening to it.
@@ -97,7 +90,7 @@ class SKPaymentQueueWrapper {
   /// Call this when there are no longer any listeners subscribed to the
   /// [InAppPurchaseStoreKitPlatform.purchaseStream].
   Future<void> stopObservingTransactionQueue() =>
-      _hostApi.stopObservingPaymentQueue();
+      hostApi.stopObservingPaymentQueue();
 
   /// Sets an implementation of the [SKPaymentQueueDelegateWrapper].
   ///
@@ -111,10 +104,10 @@ class SKPaymentQueueWrapper {
   /// default behaviour will apply (see [documentation](https://developer.apple.com/documentation/storekit/skpaymentqueue/3182429-delegate?language=objc)).
   Future<void> setDelegate(SKPaymentQueueDelegateWrapper? delegate) async {
     if (delegate == null) {
-      await _hostApi.removePaymentQueueDelegate();
+      await hostApi.removePaymentQueueDelegate();
       paymentQueueDelegateChannel.setMethodCallHandler(null);
     } else {
-      await _hostApi.registerPaymentQueueDelegate();
+      await hostApi.registerPaymentQueueDelegate();
       paymentQueueDelegateChannel.setMethodCallHandler(
         handlePaymentQueueDelegateCallbacks,
       );
@@ -149,7 +142,7 @@ class SKPaymentQueueWrapper {
       '[in_app_purchase]: Trying to add a payment without an observer. One must be set using `SkPaymentQueueWrapper.setTransactionObserver` before the app launches.',
     );
 
-    await _hostApi.addPayment(payment.toMap());
+    await hostApi.addPayment(payment.toMap());
   }
 
   /// Finishes a transaction and removes it from the queue.
@@ -167,7 +160,7 @@ class SKPaymentQueueWrapper {
     SKPaymentTransactionWrapper transaction,
   ) async {
     final Map<String, String?> requestMap = transaction.toFinishMap();
-    await _hostApi.finishTransaction(requestMap);
+    await hostApi.finishTransaction(requestMap);
   }
 
   /// Restore previously purchased transactions.
@@ -191,7 +184,7 @@ class SKPaymentQueueWrapper {
   /// or [`-[SKPayment restoreCompletedTransactionsWithApplicationUsername:]`](https://developer.apple.com/documentation/storekit/skpaymentqueue/1505992-restorecompletedtransactionswith?language=objc)
   /// depending on whether the `applicationUserName` is set.
   Future<void> restoreTransactions({String? applicationUserName}) async {
-    await _hostApi.restoreTransactions(applicationUserName);
+    await hostApi.restoreTransactions(applicationUserName);
   }
 
   /// Present Code Redemption Sheet
@@ -201,7 +194,7 @@ class SKPaymentQueueWrapper {
   /// This method triggers [`-[SKPayment
   /// presentCodeRedemptionSheet]`](https://developer.apple.com/documentation/storekit/skpaymentqueue/3566726-presentcoderedemptionsheet?language=objc)
   Future<void> presentCodeRedemptionSheet() async {
-    await _hostApi.presentCodeRedemptionSheet();
+    await hostApi.presentCodeRedemptionSheet();
   }
 
   /// Shows the price consent sheet if the user has not yet responded to a
@@ -213,7 +206,7 @@ class SKPaymentQueueWrapper {
   ///
   /// See documentation of StoreKit's [`-[SKPaymentQueue showPriceConsentIfNeeded]`](https://developer.apple.com/documentation/storekit/skpaymentqueue/3521327-showpriceconsentifneeded?language=objc).
   Future<void> showPriceConsentIfNeeded() async {
-    await _hostApi.showPriceConsentIfNeeded();
+    await hostApi.showPriceConsentIfNeeded();
   }
 
   /// Triage a method channel call from the platform and triggers the correct observer method.
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_receipt_manager.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_receipt_manager.dart
index 58f00ac4610..e0e6784bc54 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_receipt_manager.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_receipt_manager.dart
@@ -4,9 +4,7 @@
 
 import 'dart:async';
 
-import '../messages.g.dart';
-
-InAppPurchaseAPI _hostApi = InAppPurchaseAPI();
+import '../in_app_purchase_apis.dart';
 
 // ignore: avoid_classes_with_only_static_members
 /// This class contains static methods to manage StoreKit receipts.
@@ -19,6 +17,6 @@ class SKReceiptManager {
   /// For more details on how to validate the receipt data, you can refer to Apple's document about [`About Receipt Validation`](https://developer.apple.com/library/archive/releasenotes/General/ValidateAppStoreReceipt/Introduction.html#//apple_ref/doc/uid/TP40010573-CH105-SW1).
   /// If the receipt is invalid or missing, you can use [SKRequestMaker.startRefreshReceiptRequest] to request a new receipt.
   static Future<String> retrieveReceiptData() async {
-    return (await _hostApi.retrieveReceiptData()) ?? '';
+    return (await hostApi.retrieveReceiptData()) ?? '';
   }
 }
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_request_maker.dart b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_request_maker.dart
index d65d0f45862..be73348dbe9 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_request_maker.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_request_maker.dart
@@ -6,11 +6,10 @@ import 'dart:async';
 
 import 'package:flutter/services.dart';
 
+import '../in_app_purchase_apis.dart';
 import '../messages.g.dart';
 import 'sk_product_wrapper.dart';
 
-InAppPurchaseAPI _hostApi = InAppPurchaseAPI();
-
 /// A request maker that handles all the requests made by SKRequest subclasses.
 ///
 /// There are multiple [SKRequest](https://developer.apple.com/documentation/storekit/skrequest?language=objc) subclasses handling different requests in the `StoreKit` with multiple delegate methods,
@@ -29,7 +28,7 @@ class SKRequestMaker {
   Future<SkProductResponseWrapper> startProductRequest(
     List<String> productIdentifiers,
   ) async {
-    final SKProductsResponseMessage productResponsePigeon = await _hostApi
+    final SKProductsResponseMessage productResponsePigeon = await hostApi
         .startProductRequest(productIdentifiers);
 
     // should products be null or <String>[] ?
@@ -55,11 +54,11 @@ class SKRequestMaker {
   Future<void> startRefreshReceiptRequest({
     Map<String, Object?>? receiptProperties,
   }) {
-    return _hostApi.refreshReceipt(receiptProperties: receiptProperties);
+    return hostApi.refreshReceipt(receiptProperties: receiptProperties);
   }
 
   /// Check if current device supports StoreKit 2.
   static Future<bool> supportsStoreKit2() async {
-    return _hostApi.supportsStoreKit2();
+    return hostApi.supportsStoreKit2();
   }
 }
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/pigeons/messages.dart b/packages/in_app_purchase/in_app_purchase_storekit/pigeons/messages.dart
index cee8def2a9f..95b215cb5b6 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/pigeons/messages.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/pigeons/messages.dart
@@ -7,7 +7,6 @@ import 'package:pigeon/pigeon.dart';
 @ConfigurePigeon(
   PigeonOptions(
     dartOut: 'lib/src/messages.g.dart',
-    dartTestOut: 'test/test_api.g.dart',
     objcHeaderOut:
         'darwin/in_app_purchase_storekit/Sources/in_app_purchase_storekit_objc/include/in_app_purchase_storekit_objc/messages.g.h',
     objcSourceOut:
@@ -238,7 +237,7 @@ class SKProductSubscriptionPeriodMessage {
 
 enum SKSubscriptionPeriodUnitMessage { day, week, month, year }
 
-@HostApi(dartHostTestHandler: 'TestInAppPurchaseApi')
+@HostApi()
 abstract class InAppPurchaseAPI {
   /// Returns if the current device is able to make payments
   bool canMakePayments();
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/pigeons/sk2_pigeon.dart b/packages/in_app_purchase/in_app_purchase_storekit/pigeons/sk2_pigeon.dart
index da8806d1b25..4feea15180e 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/pigeons/sk2_pigeon.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/pigeons/sk2_pigeon.dart
@@ -7,7 +7,6 @@ import 'package:pigeon/pigeon.dart';
 @ConfigurePigeon(
   PigeonOptions(
     dartOut: 'lib/src/sk2_pigeon.g.dart',
-    dartTestOut: 'test/sk2_test_api.g.dart',
     swiftOut:
         'darwin/in_app_purchase_storekit/Sources/in_app_purchase_storekit/StoreKit2/sk2_pigeon.g.swift',
     copyrightHeader: 'pigeons/copyright.txt',
@@ -216,7 +215,7 @@ enum SK2ProductPurchaseResultMessage {
   pending,
 }
 
-@HostApi(dartHostTestHandler: 'TestInAppPurchase2Api')
+@HostApi()
 abstract class InAppPurchase2API {
   // https://developer.apple.com/documentation/storekit/appstore/3822277-canmakepayments
   bool canMakePayments();
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/pubspec.yaml b/packages/in_app_purchase/in_app_purchase_storekit/pubspec.yaml
index 345ac034774..195e1614ddc 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase_storekit/pubspec.yaml
@@ -2,7 +2,7 @@ name: in_app_purchase_storekit
 description: An implementation for the iOS and macOS platforms of the Flutter `in_app_purchase` plugin. This uses the StoreKit Framework.
 repository: https://github.com/flutter/packages/tree/main/packages/in_app_purchase/in_app_purchase_storekit
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+in_app_purchase%22
-version: 0.4.6
+version: 0.4.6+1
 
 environment:
   sdk: ^3.9.0
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/fakes/fake_storekit_platform.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/fakes/fake_storekit_platform.dart
index 0c7ca53fcb4..4b155205af5 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/fakes/fake_storekit_platform.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/test/fakes/fake_storekit_platform.dart
@@ -11,11 +11,9 @@ import 'package:in_app_purchase_storekit/src/store_kit_2_wrappers/sk2_product_wr
 import 'package:in_app_purchase_storekit/src/store_kit_2_wrappers/sk2_transaction_wrapper.dart';
 import 'package:in_app_purchase_storekit/store_kit_wrappers.dart';
 
-import '../sk2_test_api.g.dart';
 import '../store_kit_wrappers/sk_test_stub_objects.dart';
-import '../test_api.g.dart';
 
-class FakeStoreKitPlatform implements TestInAppPurchaseApi {
+class FakeStoreKitPlatform implements InAppPurchaseAPI {
   // pre-configured store information
   String? receiptData;
   late Set<String> validProductIDs;
@@ -155,12 +153,12 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  bool canMakePayments() {
+  Future<bool> canMakePayments() async {
     return true;
   }
 
   @override
-  void addPayment(Map<String?, Object?> paymentMap) {
+  Future<void> addPayment(Map<String?, Object?> paymentMap) async {
     final String id = paymentMap['productIdentifier']! as String;
     final int quantity = paymentMap['quantity']! as int;
 
@@ -221,7 +219,7 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  SKStorefrontMessage storefront() {
+  Future<SKStorefrontMessage> storefront() async {
     return SKStorefrontMessage(
       countryCode: _countryCode,
       identifier: _countryIdentifier,
@@ -229,12 +227,12 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  List<SKPaymentTransactionMessage> transactions() {
+  Future<List<SKPaymentTransactionMessage>> transactions() async {
     throw UnimplementedError();
   }
 
   @override
-  void finishTransaction(Map<String?, Object?> finishMap) {
+  Future<void> finishTransaction(Map<String?, Object?> finishMap) async {
     finishedTransactions.add(
       createPurchasedTransaction(
         finishMap['productIdentifier']! as String,
@@ -245,10 +243,10 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  void presentCodeRedemptionSheet() {}
+  Future<void> presentCodeRedemptionSheet() async {}
 
   @override
-  void restoreTransactions(String? applicationUserName) {
+  Future<void> restoreTransactions(String? applicationUserName) async {
     if (restoreException != null) {
       throw restoreException!;
     }
@@ -301,17 +299,17 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  void registerPaymentQueueDelegate() {
+  Future<void> registerPaymentQueueDelegate() async {
     isPaymentQueueDelegateRegistered = true;
   }
 
   @override
-  void removePaymentQueueDelegate() {
+  Future<void> removePaymentQueueDelegate() async {
     isPaymentQueueDelegateRegistered = false;
   }
 
   @override
-  String retrieveReceiptData() {
+  Future<String> retrieveReceiptData() async {
     if (receiptData != null) {
       return receiptData!;
     } else {
@@ -320,25 +318,33 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  void showPriceConsentIfNeeded() {}
+  Future<void> showPriceConsentIfNeeded() async {}
 
   @override
-  void startObservingPaymentQueue() {
+  Future<void> startObservingPaymentQueue() async {
     queueIsActive = true;
   }
 
   @override
-  void stopObservingPaymentQueue() {
+  Future<void> stopObservingPaymentQueue() async {
     queueIsActive = false;
   }
 
   @override
-  bool supportsStoreKit2() {
+  Future<bool> supportsStoreKit2() async {
     return shouldStoreKit2BeEnabled;
   }
+
+  @override
+  // ignore: non_constant_identifier_names
+  BinaryMessenger? get pigeonVar_binaryMessenger => null;
+
+  @override
+  // ignore: non_constant_identifier_names
+  String get pigeonVar_messageChannelSuffix => '';
 }
 
-class FakeStoreKit2Platform implements TestInAppPurchase2Api {
+class FakeStoreKit2Platform implements InAppPurchase2API {
   late Set<String> validProductIDs;
   late Map<String, SK2Product> validProducts;
   late List<SK2TransactionMessage> transactionList = <SK2TransactionMessage>[];
@@ -387,12 +393,12 @@ class FakeStoreKit2Platform implements TestInAppPurchase2Api {
   }
 
   @override
-  bool canMakePayments() {
+  Future<bool> canMakePayments() async {
     return true;
   }
 
   @override
-  Future<List<SK2ProductMessage>> products(List<String?> identifiers) {
+  Future<List<SK2ProductMessage>> products(List<String?> identifiers) async {
     if (queryProductException != null) {
       throw queryProductException!;
     }
@@ -445,12 +451,12 @@ class FakeStoreKit2Platform implements TestInAppPurchase2Api {
   }
 
   @override
-  void startListeningToTransactions() {
+  Future<void> startListeningToTransactions() async {
     isListenerRegistered = true;
   }
 
   @override
-  void stopListeningToTransactions() {
+  Future<void> stopListeningToTransactions() async {
     isListenerRegistered = false;
   }
 
@@ -467,9 +473,7 @@ class FakeStoreKit2Platform implements TestInAppPurchase2Api {
   }
 
   @override
-  Future<void> sync() {
-    return Future<void>.value();
-  }
+  Future<void> sync() async {}
 
   @override
   Future<bool> isWinBackOfferEligible(String productId, String offerId) async {
@@ -512,6 +516,14 @@ class FakeStoreKit2Platform implements TestInAppPurchase2Api {
 
     return eligibleIntroductoryOffers[productId] ?? false;
   }
+
+  @override
+  // ignore: non_constant_identifier_names
+  BinaryMessenger? get pigeonVar_binaryMessenger => null;
+
+  @override
+  // ignore: non_constant_identifier_names
+  String get pigeonVar_messageChannelSuffix => '';
 }
 
 SK2TransactionMessage createPendingTransaction(String id, {int quantity = 1}) {
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_2_platform_test.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_2_platform_test.dart
index 7477775f360..8ce69c30066 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_2_platform_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_2_platform_test.dart
@@ -8,11 +8,10 @@ import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:in_app_purchase_platform_interface/in_app_purchase_platform_interface.dart';
 import 'package:in_app_purchase_storekit/in_app_purchase_storekit.dart';
+import 'package:in_app_purchase_storekit/src/in_app_purchase_apis.dart';
 import 'package:in_app_purchase_storekit/store_kit_2_wrappers.dart';
 
 import 'fakes/fake_storekit_platform.dart';
-import 'sk2_test_api.g.dart';
-import 'test_api.g.dart';
 
 void main() {
   final SK2Product dummyProductWrapper = SK2Product(
@@ -33,8 +32,10 @@ void main() {
   late InAppPurchaseStoreKitPlatform iapStoreKitPlatform;
 
   setUpAll(() {
-    TestInAppPurchase2Api.setUp(fakeStoreKit2Platform);
-    TestInAppPurchaseApi.setUp(fakeStoreKitPlatform);
+    setInAppPurchaseHostApis(
+      api: fakeStoreKitPlatform,
+      api2: fakeStoreKit2Platform,
+    );
   });
 
   setUp(() {
@@ -399,7 +400,7 @@ void main() {
     setUp(() async {
       fakeStoreKit2Platform = FakeStoreKit2Platform();
       fakeStoreKit2Platform.reset();
-      TestInAppPurchase2Api.setUp(fakeStoreKit2Platform);
+      setInAppPurchaseHostApis(api2: fakeStoreKit2Platform);
       await InAppPurchaseStoreKitPlatform.enableStoreKit2();
     });
 
@@ -537,7 +538,7 @@ void main() {
     setUp(() async {
       fakeStoreKit2Platform = FakeStoreKit2Platform();
       fakeStoreKit2Platform.reset();
-      TestInAppPurchase2Api.setUp(fakeStoreKit2Platform);
+      setInAppPurchaseHostApis(api2: fakeStoreKit2Platform);
       await InAppPurchaseStoreKitPlatform.enableStoreKit2();
     });
 
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_addtion_test.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_addtion_test.dart
index afbf18cf587..5e2ad208896 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_addtion_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_addtion_test.dart
@@ -5,9 +5,9 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:in_app_purchase_platform_interface/in_app_purchase_platform_interface.dart';
 import 'package:in_app_purchase_storekit/in_app_purchase_storekit.dart';
+import 'package:in_app_purchase_storekit/src/in_app_purchase_apis.dart';
 
 import 'fakes/fake_storekit_platform.dart';
-import 'test_api.g.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -15,7 +15,7 @@ void main() {
   final FakeStoreKitPlatform fakeStoreKitPlatform = FakeStoreKitPlatform();
 
   setUpAll(() {
-    TestInAppPurchaseApi.setUp(fakeStoreKitPlatform);
+    setInAppPurchaseHostApis(api: fakeStoreKitPlatform);
   });
 
   group('present code redemption sheet', () {
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_test.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_test.dart
index 859b6779614..cf793c6c482 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/test/in_app_purchase_storekit_platform_test.dart
@@ -8,12 +8,12 @@ import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:in_app_purchase_platform_interface/in_app_purchase_platform_interface.dart';
 import 'package:in_app_purchase_storekit/in_app_purchase_storekit.dart';
+import 'package:in_app_purchase_storekit/src/in_app_purchase_apis.dart';
 import 'package:in_app_purchase_storekit/src/store_kit_wrappers/enum_converters.dart';
 import 'package:in_app_purchase_storekit/store_kit_wrappers.dart';
 
 import 'fakes/fake_storekit_platform.dart';
 import 'store_kit_wrappers/sk_test_stub_objects.dart';
-import 'test_api.g.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -22,7 +22,7 @@ void main() {
   late InAppPurchaseStoreKitPlatform iapStoreKitPlatform;
 
   setUpAll(() {
-    TestInAppPurchaseApi.setUp(fakeStoreKitPlatform);
+    setInAppPurchaseHostApis(api: fakeStoreKitPlatform);
   });
 
   setUp(() {
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/sk2_test_api.g.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/sk2_test_api.g.dart
deleted file mode 100644
index bde01de4964..00000000000
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/sk2_test_api.g.dart
+++ /dev/null
@@ -1,601 +0,0 @@
-// Copyright 2013 The Flutter Authors
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-// Autogenerated from Pigeon (v25.5.0), do not edit directly.
-// See also: https://pub.dev/packages/pigeon
-// ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, unnecessary_import, no_leading_underscores_for_local_identifiers
-// ignore_for_file: avoid_relative_lib_imports
-import 'dart:async';
-import 'dart:typed_data' show Float64List, Int32List, Int64List, Uint8List;
-import 'package:flutter/foundation.dart' show ReadBuffer, WriteBuffer;
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:in_app_purchase_storekit/src/sk2_pigeon.g.dart';
-
-class _PigeonCodec extends StandardMessageCodec {
-  const _PigeonCodec();
-  @override
-  void writeValue(WriteBuffer buffer, Object? value) {
-    if (value is int) {
-      buffer.putUint8(4);
-      buffer.putInt64(value);
-    } else if (value is SK2ProductTypeMessage) {
-      buffer.putUint8(129);
-      writeValue(buffer, value.index);
-    } else if (value is SK2SubscriptionOfferTypeMessage) {
-      buffer.putUint8(130);
-      writeValue(buffer, value.index);
-    } else if (value is SK2SubscriptionOfferPaymentModeMessage) {
-      buffer.putUint8(131);
-      writeValue(buffer, value.index);
-    } else if (value is SK2SubscriptionPeriodUnitMessage) {
-      buffer.putUint8(132);
-      writeValue(buffer, value.index);
-    } else if (value is SK2ProductPurchaseResultMessage) {
-      buffer.putUint8(133);
-      writeValue(buffer, value.index);
-    } else if (value is SK2SubscriptionOfferMessage) {
-      buffer.putUint8(134);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2SubscriptionPeriodMessage) {
-      buffer.putUint8(135);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2SubscriptionInfoMessage) {
-      buffer.putUint8(136);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2ProductMessage) {
-      buffer.putUint8(137);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2PriceLocaleMessage) {
-      buffer.putUint8(138);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2SubscriptionOfferSignatureMessage) {
-      buffer.putUint8(139);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2SubscriptionOfferPurchaseMessage) {
-      buffer.putUint8(140);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2ProductPurchaseOptionsMessage) {
-      buffer.putUint8(141);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2TransactionMessage) {
-      buffer.putUint8(142);
-      writeValue(buffer, value.encode());
-    } else if (value is SK2ErrorMessage) {
-      buffer.putUint8(143);
-      writeValue(buffer, value.encode());
-    } else {
-      super.writeValue(buffer, value);
-    }
-  }
-
-  @override
-  Object? readValueOfType(int type, ReadBuffer buffer) {
-    switch (type) {
-      case 129:
-        final int? value = readValue(buffer) as int?;
-        return value == null ? null : SK2ProductTypeMessage.values[value];
-      case 130:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SK2SubscriptionOfferTypeMessage.values[value];
-      case 131:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SK2SubscriptionOfferPaymentModeMessage.values[value];
-      case 132:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SK2SubscriptionPeriodUnitMessage.values[value];
-      case 133:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SK2ProductPurchaseResultMessage.values[value];
-      case 134:
-        return SK2SubscriptionOfferMessage.decode(readValue(buffer)!);
-      case 135:
-        return SK2SubscriptionPeriodMessage.decode(readValue(buffer)!);
-      case 136:
-        return SK2SubscriptionInfoMessage.decode(readValue(buffer)!);
-      case 137:
-        return SK2ProductMessage.decode(readValue(buffer)!);
-      case 138:
-        return SK2PriceLocaleMessage.decode(readValue(buffer)!);
-      case 139:
-        return SK2SubscriptionOfferSignatureMessage.decode(readValue(buffer)!);
-      case 140:
-        return SK2SubscriptionOfferPurchaseMessage.decode(readValue(buffer)!);
-      case 141:
-        return SK2ProductPurchaseOptionsMessage.decode(readValue(buffer)!);
-      case 142:
-        return SK2TransactionMessage.decode(readValue(buffer)!);
-      case 143:
-        return SK2ErrorMessage.decode(readValue(buffer)!);
-      default:
-        return super.readValueOfType(type, buffer);
-    }
-  }
-}
-
-abstract class TestInAppPurchase2Api {
-  static TestDefaultBinaryMessengerBinding? get _testBinaryMessengerBinding =>
-      TestDefaultBinaryMessengerBinding.instance;
-  static const MessageCodec<Object?> pigeonChannelCodec = _PigeonCodec();
-
-  bool canMakePayments();
-
-  Future<List<SK2ProductMessage>> products(List<String> identifiers);
-
-  Future<SK2ProductPurchaseResultMessage> purchase(
-    String id, {
-    SK2ProductPurchaseOptionsMessage? options,
-  });
-
-  Future<bool> isWinBackOfferEligible(String productId, String offerId);
-
-  Future<bool> isIntroductoryOfferEligible(String productId);
-
-  Future<List<SK2TransactionMessage>> transactions();
-
-  Future<void> finish(int id);
-
-  void startListeningToTransactions();
-
-  void stopListeningToTransactions();
-
-  Future<void> restorePurchases();
-
-  Future<String> countryCode();
-
-  Future<void> sync();
-
-  static void setUp(
-    TestInAppPurchase2Api? api, {
-    BinaryMessenger? binaryMessenger,
-    String messageChannelSuffix = '',
-  }) {
-    messageChannelSuffix = messageChannelSuffix.isNotEmpty
-        ? '.$messageChannelSuffix'
-        : '';
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.canMakePayments$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final bool output = api.canMakePayments();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.products$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.products was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final List<String>? arg_identifiers = (args[0] as List<Object?>?)
-                  ?.cast<String>();
-              assert(
-                arg_identifiers != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.products was null, expected non-null List<String>.',
-              );
-              try {
-                final List<SK2ProductMessage> output = await api.products(
-                  arg_identifiers!,
-                );
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.purchase$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.purchase was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final String? arg_id = (args[0] as String?);
-              assert(
-                arg_id != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.purchase was null, expected non-null String.',
-              );
-              final SK2ProductPurchaseOptionsMessage? arg_options =
-                  (args[1] as SK2ProductPurchaseOptionsMessage?);
-              try {
-                final SK2ProductPurchaseResultMessage output = await api
-                    .purchase(arg_id!, options: arg_options);
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isWinBackOfferEligible$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger.setMockDecodedMessageHandler<
-          Object?
-        >(pigeonVar_channel, (Object? message) async {
-          assert(
-            message != null,
-            'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isWinBackOfferEligible was null.',
-          );
-          final List<Object?> args = (message as List<Object?>?)!;
-          final String? arg_productId = (args[0] as String?);
-          assert(
-            arg_productId != null,
-            'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isWinBackOfferEligible was null, expected non-null String.',
-          );
-          final String? arg_offerId = (args[1] as String?);
-          assert(
-            arg_offerId != null,
-            'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isWinBackOfferEligible was null, expected non-null String.',
-          );
-          try {
-            final bool output = await api.isWinBackOfferEligible(
-              arg_productId!,
-              arg_offerId!,
-            );
-            return <Object?>[output];
-          } on PlatformException catch (e) {
-            return wrapResponse(error: e);
-          } catch (e) {
-            return wrapResponse(
-              error: PlatformException(code: 'error', message: e.toString()),
-            );
-          }
-        });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isIntroductoryOfferEligible$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isIntroductoryOfferEligible was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final String? arg_productId = (args[0] as String?);
-              assert(
-                arg_productId != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.isIntroductoryOfferEligible was null, expected non-null String.',
-              );
-              try {
-                final bool output = await api.isIntroductoryOfferEligible(
-                  arg_productId!,
-                );
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.transactions$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final List<SK2TransactionMessage> output = await api
-                    .transactions();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.finish$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.finish was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final int? arg_id = (args[0] as int?);
-              assert(
-                arg_id != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.finish was null, expected non-null int.',
-              );
-              try {
-                await api.finish(arg_id!);
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.startListeningToTransactions$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.startListeningToTransactions();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.stopListeningToTransactions$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.stopListeningToTransactions();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.restorePurchases$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                await api.restorePurchases();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.countryCode$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final String output = await api.countryCode();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchase2API.sync$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                await api.sync();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-  }
-}
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_methodchannel_apis_test.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_methodchannel_apis_test.dart
index e9bb9d41e95..497c567bbf6 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_methodchannel_apis_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_methodchannel_apis_test.dart
@@ -4,9 +4,9 @@
 
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:in_app_purchase_storekit/src/in_app_purchase_apis.dart';
 import 'package:in_app_purchase_storekit/src/messages.g.dart';
 import 'package:in_app_purchase_storekit/store_kit_wrappers.dart';
-import '../test_api.g.dart';
 import 'sk_test_stub_objects.dart';
 
 void main() {
@@ -15,7 +15,7 @@ void main() {
   final FakeStoreKitPlatform fakeStoreKitPlatform = FakeStoreKitPlatform();
 
   setUpAll(() {
-    TestInAppPurchaseApi.setUp(fakeStoreKitPlatform);
+    setInAppPurchaseHostApis(api: fakeStoreKitPlatform);
   });
 
   setUp(() {});
@@ -77,7 +77,7 @@ void main() {
       fakeStoreKitPlatform.getReceiptFailTest = true;
       expect(
         () async => SKReceiptManager.retrieveReceiptData(),
-        throwsA(const TypeMatcher<PlatformException>()),
+        throwsA(const TypeMatcher<Exception>()),
       );
     });
   });
@@ -192,7 +192,7 @@ void main() {
   });
 }
 
-class FakeStoreKitPlatform implements TestInAppPurchaseApi {
+class FakeStoreKitPlatform implements InAppPurchaseAPI {
   // get product request
   List<dynamic> startProductRequestParam = <dynamic>[];
   bool getProductRequestFailTest = false;
@@ -223,19 +223,19 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   bool? queueIsActive;
 
   @override
-  void addPayment(Map<String?, Object?> paymentMap) {
+  Future<void> addPayment(Map<String?, Object?> paymentMap) async {
     payments.add(
       SKPaymentWrapper.fromJson(Map<String, dynamic>.from(paymentMap)),
     );
   }
 
   @override
-  bool canMakePayments() {
+  Future<bool> canMakePayments() async {
     return true;
   }
 
   @override
-  SKStorefrontMessage storefront() {
+  Future<SKStorefrontMessage> storefront() async {
     return SKStorefrontMessage(
       countryCode: 'USA',
       identifier: 'unique_identifier',
@@ -243,59 +243,59 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  List<SKPaymentTransactionMessage> transactions() =>
+  Future<List<SKPaymentTransactionMessage>> transactions() async =>
       <SKPaymentTransactionMessage>[dummyTransactionMessage];
 
   @override
-  void finishTransaction(Map<String?, Object?> finishMap) {
+  Future<void> finishTransaction(Map<String?, Object?> finishMap) async {
     transactionsFinished.add(Map<String, String>.from(finishMap));
   }
 
   @override
-  void presentCodeRedemptionSheet() {
+  Future<void> presentCodeRedemptionSheet() async {
     presentCodeRedemption = true;
   }
 
   @override
-  void restoreTransactions(String? applicationUserName) {
+  Future<void> restoreTransactions(String? applicationUserName) async {
     applicationNameHasTransactionRestored = applicationUserName!;
   }
 
   @override
   Future<SKProductsResponseMessage> startProductRequest(
     List<String?> productIdentifiers,
-  ) {
+  ) async {
     startProductRequestParam = productIdentifiers;
     if (getProductRequestFailTest) {
       return Future<SKProductsResponseMessage>.value(
         SKProductsResponseMessage(),
       );
     }
-    return Future<SKProductsResponseMessage>.value(dummyProductResponseMessage);
+    return dummyProductResponseMessage;
   }
 
   @override
-  void registerPaymentQueueDelegate() {
+  Future<void> registerPaymentQueueDelegate() async {
     isPaymentQueueDelegateRegistered = true;
   }
 
   @override
-  void removePaymentQueueDelegate() {
+  Future<void> removePaymentQueueDelegate() async {
     isPaymentQueueDelegateRegistered = false;
   }
 
   @override
-  void startObservingPaymentQueue() {
+  Future<void> startObservingPaymentQueue() async {
     queueIsActive = true;
   }
 
   @override
-  void stopObservingPaymentQueue() {
+  Future<void> stopObservingPaymentQueue() async {
     queueIsActive = false;
   }
 
   @override
-  String retrieveReceiptData() {
+  Future<String> retrieveReceiptData() async {
     if (getReceiptFailTest) {
       throw Exception('some arbitrary error');
     }
@@ -312,14 +312,22 @@ class FakeStoreKitPlatform implements TestInAppPurchaseApi {
   }
 
   @override
-  void showPriceConsentIfNeeded() {
+  Future<void> showPriceConsentIfNeeded() async {
     showPriceConsent = true;
   }
 
   @override
-  bool supportsStoreKit2() {
+  Future<bool> supportsStoreKit2() async {
     return true;
   }
+
+  @override
+  // ignore: non_constant_identifier_names
+  BinaryMessenger? get pigeonVar_binaryMessenger => null;
+
+  @override
+  // ignore: non_constant_identifier_names
+  String get pigeonVar_messageChannelSuffix => '';
 }
 
 class TestPaymentQueueDelegate extends SKPaymentQueueDelegateWrapper {}
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_payment_queue_delegate_api_test.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_payment_queue_delegate_api_test.dart
index bc136d03d07..08eca698b1a 100644
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_payment_queue_delegate_api_test.dart
+++ b/packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/sk_payment_queue_delegate_api_test.dart
@@ -4,10 +4,10 @@
 
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:in_app_purchase_storekit/src/in_app_purchase_apis.dart';
 import 'package:in_app_purchase_storekit/store_kit_wrappers.dart';
 
 import '../fakes/fake_storekit_platform.dart';
-import '../test_api.g.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -15,7 +15,7 @@ void main() {
   final FakeStoreKitPlatform fakeStoreKitPlatform = FakeStoreKitPlatform();
 
   setUpAll(() {
-    TestInAppPurchaseApi.setUp(fakeStoreKitPlatform);
+    setInAppPurchaseHostApis(api: fakeStoreKitPlatform);
   });
 
   test(
diff --git a/packages/in_app_purchase/in_app_purchase_storekit/test/test_api.g.dart b/packages/in_app_purchase/in_app_purchase_storekit/test/test_api.g.dart
deleted file mode 100644
index c970a8bde29..00000000000
--- a/packages/in_app_purchase/in_app_purchase_storekit/test/test_api.g.dart
+++ /dev/null
@@ -1,714 +0,0 @@
-// Copyright 2013 The Flutter Authors
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-// Autogenerated from Pigeon (v22.7.3), do not edit directly.
-// See also: https://pub.dev/packages/pigeon
-// ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, unnecessary_import, no_leading_underscores_for_local_identifiers
-// ignore_for_file: avoid_relative_lib_imports
-import 'dart:async';
-import 'dart:typed_data' show Float64List, Int32List, Int64List, Uint8List;
-import 'package:flutter/foundation.dart' show ReadBuffer, WriteBuffer;
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:in_app_purchase_storekit/src/messages.g.dart';
-
-class _PigeonCodec extends StandardMessageCodec {
-  const _PigeonCodec();
-  @override
-  void writeValue(WriteBuffer buffer, Object? value) {
-    if (value is int) {
-      buffer.putUint8(4);
-      buffer.putInt64(value);
-    } else if (value is SKPaymentTransactionStateMessage) {
-      buffer.putUint8(129);
-      writeValue(buffer, value.index);
-    } else if (value is SKProductDiscountTypeMessage) {
-      buffer.putUint8(130);
-      writeValue(buffer, value.index);
-    } else if (value is SKProductDiscountPaymentModeMessage) {
-      buffer.putUint8(131);
-      writeValue(buffer, value.index);
-    } else if (value is SKSubscriptionPeriodUnitMessage) {
-      buffer.putUint8(132);
-      writeValue(buffer, value.index);
-    } else if (value is SKPaymentTransactionMessage) {
-      buffer.putUint8(133);
-      writeValue(buffer, value.encode());
-    } else if (value is SKPaymentMessage) {
-      buffer.putUint8(134);
-      writeValue(buffer, value.encode());
-    } else if (value is SKErrorMessage) {
-      buffer.putUint8(135);
-      writeValue(buffer, value.encode());
-    } else if (value is SKPaymentDiscountMessage) {
-      buffer.putUint8(136);
-      writeValue(buffer, value.encode());
-    } else if (value is SKStorefrontMessage) {
-      buffer.putUint8(137);
-      writeValue(buffer, value.encode());
-    } else if (value is SKProductsResponseMessage) {
-      buffer.putUint8(138);
-      writeValue(buffer, value.encode());
-    } else if (value is SKProductMessage) {
-      buffer.putUint8(139);
-      writeValue(buffer, value.encode());
-    } else if (value is SKPriceLocaleMessage) {
-      buffer.putUint8(140);
-      writeValue(buffer, value.encode());
-    } else if (value is SKProductDiscountMessage) {
-      buffer.putUint8(141);
-      writeValue(buffer, value.encode());
-    } else if (value is SKProductSubscriptionPeriodMessage) {
-      buffer.putUint8(142);
-      writeValue(buffer, value.encode());
-    } else {
-      super.writeValue(buffer, value);
-    }
-  }
-
-  @override
-  Object? readValueOfType(int type, ReadBuffer buffer) {
-    switch (type) {
-      case 129:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SKPaymentTransactionStateMessage.values[value];
-      case 130:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SKProductDiscountTypeMessage.values[value];
-      case 131:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SKProductDiscountPaymentModeMessage.values[value];
-      case 132:
-        final int? value = readValue(buffer) as int?;
-        return value == null
-            ? null
-            : SKSubscriptionPeriodUnitMessage.values[value];
-      case 133:
-        return SKPaymentTransactionMessage.decode(readValue(buffer)!);
-      case 134:
-        return SKPaymentMessage.decode(readValue(buffer)!);
-      case 135:
-        return SKErrorMessage.decode(readValue(buffer)!);
-      case 136:
-        return SKPaymentDiscountMessage.decode(readValue(buffer)!);
-      case 137:
-        return SKStorefrontMessage.decode(readValue(buffer)!);
-      case 138:
-        return SKProductsResponseMessage.decode(readValue(buffer)!);
-      case 139:
-        return SKProductMessage.decode(readValue(buffer)!);
-      case 140:
-        return SKPriceLocaleMessage.decode(readValue(buffer)!);
-      case 141:
-        return SKProductDiscountMessage.decode(readValue(buffer)!);
-      case 142:
-        return SKProductSubscriptionPeriodMessage.decode(readValue(buffer)!);
-      default:
-        return super.readValueOfType(type, buffer);
-    }
-  }
-}
-
-abstract class TestInAppPurchaseApi {
-  static TestDefaultBinaryMessengerBinding? get _testBinaryMessengerBinding =>
-      TestDefaultBinaryMessengerBinding.instance;
-  static const MessageCodec<Object?> pigeonChannelCodec = _PigeonCodec();
-
-  /// Returns if the current device is able to make payments
-  bool canMakePayments();
-
-  List<SKPaymentTransactionMessage> transactions();
-
-  SKStorefrontMessage storefront();
-
-  void addPayment(Map<String, Object?> paymentMap);
-
-  Future<SKProductsResponseMessage> startProductRequest(
-    List<String> productIdentifiers,
-  );
-
-  void finishTransaction(Map<String, Object?> finishMap);
-
-  void restoreTransactions(String? applicationUserName);
-
-  void presentCodeRedemptionSheet();
-
-  String? retrieveReceiptData();
-
-  Future<void> refreshReceipt({Map<String, Object?>? receiptProperties});
-
-  void startObservingPaymentQueue();
-
-  void stopObservingPaymentQueue();
-
-  void registerPaymentQueueDelegate();
-
-  void removePaymentQueueDelegate();
-
-  void showPriceConsentIfNeeded();
-
-  bool supportsStoreKit2();
-
-  static void setUp(
-    TestInAppPurchaseApi? api, {
-    BinaryMessenger? binaryMessenger,
-    String messageChannelSuffix = '',
-  }) {
-    messageChannelSuffix = messageChannelSuffix.isNotEmpty
-        ? '.$messageChannelSuffix'
-        : '';
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.canMakePayments$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final bool output = api.canMakePayments();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.transactions$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final List<SKPaymentTransactionMessage> output = api
-                    .transactions();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.storefront$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final SKStorefrontMessage output = api.storefront();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.addPayment$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.addPayment was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final Map<String, Object?>? arg_paymentMap =
-                  (args[0] as Map<Object?, Object?>?)?.cast<String, Object?>();
-              assert(
-                arg_paymentMap != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.addPayment was null, expected non-null Map<String, Object?>.',
-              );
-              try {
-                api.addPayment(arg_paymentMap!);
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.startProductRequest$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.startProductRequest was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final List<String>? arg_productIdentifiers =
-                  (args[0] as List<Object?>?)?.cast<String>();
-              assert(
-                arg_productIdentifiers != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.startProductRequest was null, expected non-null List<String>.',
-              );
-              try {
-                final SKProductsResponseMessage output = await api
-                    .startProductRequest(arg_productIdentifiers!);
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.finishTransaction$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.finishTransaction was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final Map<String, Object?>? arg_finishMap =
-                  (args[0] as Map<Object?, Object?>?)?.cast<String, Object?>();
-              assert(
-                arg_finishMap != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.finishTransaction was null, expected non-null Map<String, Object?>.',
-              );
-              try {
-                api.finishTransaction(arg_finishMap!);
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.restoreTransactions$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.restoreTransactions was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final String? arg_applicationUserName = (args[0] as String?);
-              try {
-                api.restoreTransactions(arg_applicationUserName);
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.presentCodeRedemptionSheet$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.presentCodeRedemptionSheet();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.retrieveReceiptData$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final String? output = api.retrieveReceiptData();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.refreshReceipt$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              assert(
-                message != null,
-                'Argument for dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.refreshReceipt was null.',
-              );
-              final List<Object?> args = (message as List<Object?>?)!;
-              final Map<String, Object?>? arg_receiptProperties =
-                  (args[0] as Map<Object?, Object?>?)?.cast<String, Object?>();
-              try {
-                await api.refreshReceipt(
-                  receiptProperties: arg_receiptProperties,
-                );
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.startObservingPaymentQueue$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.startObservingPaymentQueue();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.stopObservingPaymentQueue$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.stopObservingPaymentQueue();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.registerPaymentQueueDelegate$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.registerPaymentQueueDelegate();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.removePaymentQueueDelegate$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.removePaymentQueueDelegate();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.showPriceConsentIfNeeded$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                api.showPriceConsentIfNeeded();
-                return wrapResponse(empty: true);
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-    {
-      final BasicMessageChannel<Object?>
-      pigeonVar_channel = BasicMessageChannel<Object?>(
-        'dev.flutter.pigeon.in_app_purchase_storekit.InAppPurchaseAPI.supportsStoreKit2$messageChannelSuffix',
-        pigeonChannelCodec,
-        binaryMessenger: binaryMessenger,
-      );
-      if (api == null) {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, null);
-      } else {
-        _testBinaryMessengerBinding!.defaultBinaryMessenger
-            .setMockDecodedMessageHandler<Object?>(pigeonVar_channel, (
-              Object? message,
-            ) async {
-              try {
-                final bool output = api.supportsStoreKit2();
-                return <Object?>[output];
-              } on PlatformException catch (e) {
-                return wrapResponse(error: e);
-              } catch (e) {
-                return wrapResponse(
-                  error: PlatformException(
-                    code: 'error',
-                    message: e.toString(),
-                  ),
-                );
-              }
-            });
-      }
-    }
-  }
-}