IOS receipt validation error 21002

Question

I\'m trying to use receipt validation with my server side. Everything is ok, but sometimes I see strange: 10 times validation is OK, but on 11 i get 21002 error. I dont know

Answer 1

It's all about the NSDataBase64EncodingOptions. Use type EncodingEndLineWithCarriageReturn instead of 0.

Simply change this line

let receiptdata = receipt.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))

to this line

let receiptdata = receipt.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.EncodingEndLineWithCarriageReturn)

I tried this myself and it worked.