Question

I want to verify the transaction receipt within my app,

Here is my code,

- (void)recordTransaction:(SKPaymentTransaction *)transaction {

    NSData *receiptData = [NSData dataWithData:transaction.transactionReceipt];

    NSString *encodedString = [Base64 encode:receiptData];

     NSURL *url = [NSURL URLWithString:@"https://sandbox.itunes.apple.com/verifyReceipt"];

    ASIFormDataRequest *request = [[ASIFormDataRequest alloc] initWithURL:url];

    [request setPostValue:encodedString forKey:@"receipt-data"];

    [request setRequestMethod:@"POST"];

    [request setDelegate:self];

    [request startAsynchronous];

}

I am getting output:

{“status”:21002, “exception”:”java.lang.NullPointerException”}

Can someone help me to get proper receipt verification?

Answer 1

After number of tries, I decided to do the receipt verification from server side. Actually this is the recommended way.

Here is my code,

-(void)recordTransaction:(SKPaymentTransaction *)transaction {   

NSString* receiptString = [[[NSString alloc] initWithData:transaction.transactionReceipt encoding:NSUTF8StringEncoding] autorelease];

// POST this string to your server

// I used ASIFormDataRequest 

}

// server side 

$url = 'https://sandbox.itunes.apple.com/verifyReceipt';

// encode the receipt data received from application

$purchase_encoded = base64_encode( $purchase_receipt );

//Create JSON

    $encodedData = json_encode( Array( 
        'receipt-data' => $purchase_encoded 
    ) );


// POST data

    //Open a Connection using POST method, as it is required to use POST method.
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $encodedData);
    $encodedResponse = curl_exec($ch);
    curl_close($ch);


  //Decode response data using json_decode method to get an object.

      $response = json_decode( $encodedResponse );


// check response

if ($response->{'status'} != 0)

    // Invalid receipt

else

   // valid reciept

I found help form,

http://gamesfromwithin.com/in-app-purchases-part-3