[in_app_purchase] Fix app exceptions caused by missing App Store receipt

packages/in_app_purchase/in_app_purchase_ios/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.0+3
+
+* iOS: Fix treating missing App Store receipt as an exception.
+
 ## 0.1.0+2
 
 * Changed the iOS payment queue handler in such a way that it only adds a listener to the SKPaymentQueue when there 

packages/in_app_purchase/in_app_purchase_ios/example/ios/RunnerTests/Stubs.m

@@ -259,7 +259,7 @@ - (instancetype)initWithMap:(NSDictionary *)map {
 
 @implementation FIAPReceiptManagerStub : FIAPReceiptManager
 
-- (NSData *)getReceiptData:(NSURL *)url {
+- (NSData *)getReceiptData:(NSURL *)url error:(NSError **)error {
   NSString *originalString = [NSString stringWithFormat:@"test"];
   return [[NSData alloc] initWithBase64EncodedString:originalString options:kNilOptions];
 }

packages/in_app_purchase/in_app_purchase_ios/ios/Classes/FIAPReceiptManager.m

@@ -9,18 +9,22 @@ @implementation FIAPReceiptManager
 
 - (NSString *)retrieveReceiptWithError:(FlutterError **)error {
   NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
-  NSData *receipt = [self getReceiptData:receiptURL];
+  NSError *err;
+  NSData *receipt = [self getReceiptData:receiptURL error:&err];
+  if (err) {
+    *error = [FlutterError errorWithCode:[[NSString alloc] initWithFormat:@"%li", (long)err.code]
+                                 message:err.domain
+                                 details:err.userInfo];
+    return nil;
+  }
   if (!receipt) {
-    *error = [FlutterError errorWithCode:@"storekit_no_receipt"
-                                 message:@"Cannot find receipt for the current main bundle."
-                                 details:nil];
     return nil;
   }
   return [receipt base64EncodedStringWithOptions:kNilOptions];
 }
 
-- (NSData *)getReceiptData:(NSURL *)url {
-  return [NSData dataWithContentsOfURL:url];
+- (NSData *)getReceiptData:(NSURL *)url error:(NSError **)error {
+  return [NSData dataWithContentsOfURL:url options:NSDataReadingMappedIfSafe error:error];
 }
 
 @end

packages/in_app_purchase/in_app_purchase_ios/lib/src/in_app_purchase_ios_platform_addition.dart

@@ -21,13 +21,17 @@ class InAppPurchaseIosPlatformAddition extends InAppPurchasePlatformAddition {
   /// If no results, a `null` value is returned.
   Future<PurchaseVerificationData?> refreshPurchaseVerificationData() async {
     await SKRequestMaker().startRefreshReceiptRequest();
-    final String? receipt = await SKReceiptManager.retrieveReceiptData();
-    if (receipt == null) {
+    try {
+      String receipt = await SKReceiptManager.retrieveReceiptData();
+      return PurchaseVerificationData(
+          localVerificationData: receipt,
+          serverVerificationData: receipt,
+          source: kIAPSource);
+    } catch (e) {
+      print(
+          'Something is wrong while fetching the receipt, this normally happens when the app is '
+          'running on a simulator: $e');
       return null;
     }
-    return PurchaseVerificationData(
-        localVerificationData: receipt,
-        serverVerificationData: receipt,
-        source: kIAPSource);
   }
 }

packages/in_app_purchase/in_app_purchase_ios/test/store_kit_wrappers/sk_methodchannel_apis_test.dart

@@ -74,6 +74,12 @@ void main() {
       expect(fakeIOSPlatform.refreshReceiptParam,
           <String, dynamic>{"isExpired": true});
     });
+
+    test('should get null receipt if any exceptions are raised', () async {
+      fakeIOSPlatform.getReceiptFailTest = true;
+      expect(() async => SKReceiptManager.retrieveReceiptData(),
+          throwsA(TypeMatcher<PlatformException>()));
+    });
   });
 
   group('sk_receipt_manager', () {
@@ -166,6 +172,9 @@ class FakeIOSPlatform {
   bool getProductRequestFailTest = false;
   bool testReturnNull = false;
 
+  // get receipt request
+  bool getReceiptFailTest = false;
+
   // refresh receipt request
   int refreshReceipt = 0;
   late Map<String, dynamic> refreshReceiptParam;
@@ -201,6 +210,9 @@ class FakeIOSPlatform {
         return Future<void>.sync(() {});
       // receipt manager
       case '-[InAppPurchasePlugin retrieveReceiptData:result:]':
+        if (getReceiptFailTest) {
+          throw ("some arbitrary error");
+        }
         return Future<String>.value('receipt data');
       // payment queue
       case '-[SKPaymentQueue canMakePayments:]':