Invalid parameter: Token Reason: iOS device tokens must be no more than 400 hexadecimal characters

Question

I am trying to create platform endpoint in amazon sns from the console. Below is the device token which I received from FCM/APNs:

fUG5dIcN_pA:APA91bEciRwWuvTIezAKcJ5y1xz5z6BygE3YJkywdCGCFJD93NTfjARwPRommwgsfvVo2iH_qZWT7D2Lxnc69uanato1UUq-nLl5R1L0qF4exT7zjM9Wdy9Evs6h-EOBtIVv7Vv8bPE1

I am getting an error: iOS device tokens must be no more than 400 hexadecimal characters.looks like APNs has sent token in string format and Amazon is expecting it in hexadecimal chars.

Answer 1

Try the below code in didRegisterForRemoteNotificationsWithDeviceToken:

let deviceToken = deviceToken.map {String(format:"%02.2hhx",$0)}.joined()
print(deviceToken)

And Paste the device token in amazon SNS console, it will work.

Answer 2

For objective-c you can use this:

NSString * deviceTokenString = [[[[deviceToken description]
                         stringByReplacingOccurrencesOfString: @"<" withString: @""] 
                        stringByReplacingOccurrencesOfString: @">" withString: @""] 
                       stringByReplacingOccurrencesOfString: @" " withString: @""];

NSLog(@"The generated device token string is : %@",deviceTokenString);