Intents.EXTRA_CLIENT_ID only accepts an integer as the external payment ID, but my system uses a guid string as the transaction ID. Is there a flag I can send the transaction ID string back with where I can retrieve it in case of a refund?
Edit: It turns out Intents.EXTRA_CLIENT_ID does take a String, but Sale crashes if you send a string with a lot of characters like a GUID. Is there any way to transfer a larger String?