Receipt validation is incorrect - ios

Question

I have tested on IAP of type Consumable with Sandbox environment. I want to make sure that the item I have bought is valid or not. but the result is always return with status "21004". I do nothing with share secret. So you can look the sample code that I follow apple when I succeed to purchase item:
- (void)verifyStatus:(SKPaymentTransaction *)transaction {
NSData *receiptData = [NSData dataWithContentsOfURL:[[NSBundle mainBundle] appStoreReceiptURL]];
NSError *receiptError;
BOOL isPresent = [[[NSBundle mainBundle] appStoreReceiptURL] checkResourceIsReachableAndReturnError:&receiptError];
if (!isPresent) {
NSLog(#"Validation failed");
}
NSString *receiptStr = [receiptData base64EncodedStringWithOptions:0];
NSDictionary *requestContents = #{#"receipt-data":receiptStr};
NSData *requestData = [NSJSONSerialization dataWithJSONObject:requestContents
options:0
error:nil];
if (!requestData) { /* ... Handle error ... */ }
NSURL *storeURL = [NSURL URLWithString:#"https://sandbox.itunes.apple.com/verifyReceipt"];
NSMutableURLRequest *storeRequest = [NSMutableURLRequest requestWithURL:storeURL];
[storeRequest setHTTPMethod:#"POST"];
[storeRequest setHTTPBody:requestData];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[NSURLConnection sendAsynchronousRequest:storeRequest queue:queue
completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (connectionError) {
/* ... Handle error ... */
} else {
NSError *error;
NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(#"Respond : %#",jsonResponse);
if (!jsonResponse) { /* ... Handle error ...*/ }
/* ... Send a response back to the device ... */
}
}];
}
What's the problem I got? Please share your experience. Thanks

Answer 1

Please try following code and steps for SECRECT KEY.
#define SHARED_SECRET #"SECRECT KEY"
-(void)checkReceipt {
// verifies receipt with Apple
NSError *jsonError = nil;
NSString *receiptBase64 = [receiptData base64EncodedStringWithOptions:0];//receiptData NSData for validate Receipt
NSLog(#"Receipt Base64: %#",receiptBase64);
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:[NSDictionary dictionaryWithObjectsAndKeys:
receiptBase64,#"receipt-data",
SHARED_SECRET,#"password",
nil]
options:NSJSONWritingPrettyPrinted
error:&jsonError
];
NSLog(#"%#",jsonData);
NSError * error=nil;
NSDictionary * parsedData = [NSJSONSerialization JSONObjectWithData:jsonData options:kNilOptions error:&error];
NSLog(#"%#",parsedData);
NSLog(#"JSON: %#",[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]);
// URL for sandbox receipt validation; replace "sandbox" with "buy" in production or you will receive
// error codes 21006 or 21007
NSURL *requestURL = [NSURL URLWithString:#"https://sandbox.itunes.apple.com/verifyReceipt"];
NSMutableURLRequest *req = [[NSMutableURLRequest alloc] initWithURL:requestURL];
[req setHTTPMethod:#"POST"];
[req setHTTPBody:jsonData];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[NSURLConnection sendAsynchronousRequest:req queue:queue
completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (connectionError) {
/* ... Handle error ... */
} else {
NSError *error;
NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(#"Respond : %#",jsonResponse);
if (!jsonResponse) { /* ... Handle error ...*/ }
/* ... Send a response back to the device ... */
}
}];
}
You need to change "SECRECT KEY" with the secret key that you get from iTunes Connect.sample look like 39fkjc38jd02mg72k9cn29dfkm39fk00.
Below is the step for create/view Secreate Key.
Login into iTunes Connect -> My Apps > Select your app > In-App
Purchases > View or generate a shared secret.