How to handle checks for cancelled subscriptions

[PasqualePuzio]

Hi,

First of all, let me thank you for the great work. I'm a very happy adopter of your library since almost 2 years now ;)

I would like to implement a simple mechanism to properly handle cancelled subscriptions.
In other words, if a user disables the auto-renewal of the subscription, I would like to be aware of it and thus deactivate the corresponding in-app purchase(s) when the subscription expires.

What's the best way do it?
Will this be enough? Will this automatically clear subscriptions that are no longer active?

[[IAPShare sharedHelper].iap restoreProductsWithCompletion:^(SKPaymentQueue *payment, NSError *error) { if (error) { // error: do your stuff } else { // do your stuff } }];

Or should I clear in-app purchases before doing that?

[[IAPShare sharedHelper].iap clearSavedPurchasedProducts];

Thanks

[tuananhit91]

Hi @PasqualePuzio

You can use try function and need to edit this function in the library.

typedef void (^checkReceiptCompleteResponseBlock)(NSDictionary* response,NSError* error);

`- (void)checkReceipt:(NSData*)receiptData AndSharedSecret:(NSString*)secretKey onCompletion:(checkReceiptCompleteResponseBlock)completion
{
self.checkReceiptCompleteBlock = completion;

NSError *jsonError = nil;
//    NSString *receiptBase64 = [NSString base64StringFromData:receiptData length:[receiptData length]];
NSString *receiptBase64 = [receiptData base64EncodedStringWithOptions:0];

NSData *jsonData = nil;

if(secretKey !=nil && ![secretKey isEqualToString:@""]) {
    
    jsonData = [NSJSONSerialization dataWithJSONObject:[NSDictionary dictionaryWithObjectsAndKeys:receiptBase64,@"receipt-data",
                                                        secretKey,@"password",
                                                        nil]
                                               options:NSJSONWritingPrettyPrinted
                                                 error:&jsonError];
    
}
else {
    jsonData = [NSJSONSerialization dataWithJSONObject:[NSDictionary dictionaryWithObjectsAndKeys:
                                                        receiptBase64,@"receipt-data",
                                                        nil]
                                               options:NSJSONWritingPrettyPrinted
                                                 error:&jsonError
                ];
}


//    NSString* jsonStr = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

NSURL *requestURL = nil;
if(_production)
{
    requestURL = [NSURL URLWithString:@"https://buy.itunes.apple.com/verifyReceipt"];
}
else {
    requestURL = [NSURL URLWithString:@"https://sandbox.itunes.apple.com/verifyReceipt"];
}

NSMutableURLRequest *req = [[NSMutableURLRequest alloc] initWithURL:requestURL];
[req setHTTPMethod:@"POST"];
[req setHTTPBody:jsonData];
[req setTimeoutInterval:30];

NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
//    self.receiptRequestData = [[NSMutableData alloc] init];

[[session
  dataTaskWithRequest:req
  completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
      
      if (error) {
          if(_checkReceiptCompleteBlock) {
              _checkReceiptCompleteBlock(nil,error);
          }
      }else{
          if (data) {
              NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
              if(_checkReceiptCompleteBlock) {
                  _checkReceiptCompleteBlock(jsonResponse,nil);
              }
          }else{
              if(_checkReceiptCompleteBlock) {
                  _checkReceiptCompleteBlock(nil, nil);
              }
          }
      }
      
  }]resume];

}
`

[tuananhit91]

I used this way to check subscription is expired or not.

https://stackoverflow.com/questions/5120177/how-to-check-in-app-purchase-auto-renewable-subscription-is-valid