Implementing Receipt Validation in Swift 3

Question

I am developing an iOS app in Swift 3 and trying to implement receipt validation following this tutorial: http://savvyapps.com/blog/how-setup-test-auto-renewable-subscriptio

Answer 1

I liked your answer and I just rewrote it in C# for those who are using it like me as I did not find a good source for the solution. Thanks Again For Consumable IAP

void ReceiptValidation()
    {
        var recPath = NSBundle.MainBundle.AppStoreReceiptUrl.Path;
        if (File.Exists(recPath))
        {
            NSData recData;
            NSError error;

            recData = NSData.FromUrl(NSBundle.MainBundle.AppStoreReceiptUrl, NSDataReadingOptions.MappedAlways, out error);

            var recString = recData.GetBase64EncodedString(NSDataBase64EncodingOptions.None);

            var dict = new Dictionary();
            dict.TryAdd("receipt-data", recString);

            var dict1 = NSDictionary.FromObjectsAndKeys(dict.Values.ToArray(), dict.Keys.ToArray());
            var storeURL = new NSUrl("https://sandbox.itunes.apple.com/verifyReceipt");
            var storeRequest = new NSMutableUrlRequest(storeURL);
            storeRequest.HttpMethod = "POST";

            var jsonData = NSJsonSerialization.Serialize(dict1, NSJsonWritingOptions.PrettyPrinted, out error);
            if (error == null)
            {
                storeRequest.Body = jsonData;
                var session = NSUrlSession.FromConfiguration(NSUrlSessionConfiguration.DefaultSessionConfiguration);
                var tsk = session.CreateDataTask(storeRequest, (data, response, err) =>
                {
                    if (err == null)
                    {
                        var rstr = NSJsonSerialization.FromObject(data);

                    }
                    else
                    {
                        // Check Error
                    } 
                });
                tsk.Resume();
            }else
            {
                // JSON Error Handling
            }
        }
    }