[in_app_purchase] fix skerror nullability (#6139)

Should fix https://github.com/flutter/flutter/issues/143177

packages/in_app_purchase/in_app_purchase_storekit/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.11
+
+* Fixes SKError.userInfo not being nullable.
+
 ## 0.3.10
 
 * Converts `startProductRequest()`, `finishTransaction()`, `restoreTransactions()`, `presentCodeRedemptionSheet()` to pigeon.

packages/in_app_purchase/in_app_purchase_storekit/darwin/Classes/messages.g.h

@@ -146,10 +146,10 @@ typedef NS_ENUM(NSUInteger, SKSubscriptionPeriodUnitMessage) {
 - (instancetype)init NS_UNAVAILABLE;
 + (instancetype)makeWithCode:(NSInteger)code
                       domain:(NSString *)domain
-                    userInfo:(NSDictionary<NSString *, id> *)userInfo;
+                    userInfo:(nullable NSDictionary<NSString *, id> *)userInfo;
 @property(nonatomic, assign) NSInteger code;
 @property(nonatomic, copy) NSString *domain;
-@property(nonatomic, copy) NSDictionary<NSString *, id> *userInfo;
+@property(nonatomic, copy, nullable) NSDictionary<NSString *, id> *userInfo;
 @end
 
 @interface SKPaymentDiscountMessage : NSObject

packages/in_app_purchase/in_app_purchase_storekit/darwin/Classes/messages.g.m

@@ -218,7 +218,7 @@ static id GetNullableObjectAtIndex(NSArray *array, NSInteger key) {
 @implementation SKErrorMessage
 + (instancetype)makeWithCode:(NSInteger)code
                       domain:(NSString *)domain
-                    userInfo:(NSDictionary<NSString *, id> *)userInfo {
+                    userInfo:(nullable NSDictionary<NSString *, id> *)userInfo {
   SKErrorMessage *pigeonResult = [[SKErrorMessage alloc] init];
   pigeonResult.code = code;
   pigeonResult.domain = domain;

packages/in_app_purchase/in_app_purchase_storekit/lib/src/messages.g.dart

@@ -195,14 +195,14 @@ class SKErrorMessage {
   SKErrorMessage({
     required this.code,
     required this.domain,
-    required this.userInfo,
+    this.userInfo,
   });
 
   int code;
 
   String domain;
 
-  Map<String?, Object?> userInfo;
+  Map<String?, Object?>? userInfo;
 
   Object encode() {
     return <Object?>[
@@ -217,7 +217,7 @@ class SKErrorMessage {
     return SKErrorMessage(
       code: result[0]! as int,
       domain: result[1]! as String,
-      userInfo: (result[2] as Map<Object?, Object?>?)!.cast<String?, Object?>(),
+      userInfo: (result[2] as Map<Object?, Object?>?)?.cast<String?, Object?>(),
     );
   }
 }

packages/in_app_purchase/in_app_purchase_storekit/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.dart

@@ -380,7 +380,10 @@ class SKError {
 
   /// Converts [SKErrorMessage] into the dart equivalent
   static SKError convertFromPigeon(SKErrorMessage msg) {
-    return SKError(code: msg.code, domain: msg.domain, userInfo: msg.userInfo);
+    return SKError(
+        code: msg.code,
+        domain: msg.domain,
+        userInfo: msg.userInfo ?? <String, Object>{});
   }
 }
 

packages/in_app_purchase/in_app_purchase_storekit/pigeons/messages.dart

@@ -91,7 +91,7 @@ class SKErrorMessage {
 
   final int code;
   final String domain;
-  final Map<String?, Object?> userInfo;
+  final Map<String?, Object?>? userInfo;
 }
 
 class SKPaymentDiscountMessage {

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: 0.3.10
+version: 0.3.11
 
 environment:
   sdk: ^3.2.3

packages/in_app_purchase/in_app_purchase_storekit/test/store_kit_wrappers/pigeon_converter_test.dart

@@ -95,4 +95,13 @@ void main() {
         SkProductResponseWrapper.convertFromPigeon(msg);
     expect(convertedWrapper, productResponse);
   });
+
+  test('test SKerror pigeon converter', () {
+    final SKErrorMessage msg = SKErrorMessage(code: 99, domain: 'domain');
+    final SKError wrapper = SKError.convertFromPigeon(msg);
+
+    expect(wrapper.code, 99);
+    expect(wrapper.domain, 'domain');
+    expect(wrapper.userInfo, <String, Object>{});
+  });
 }