IAB signed data with no orders in it

Question

I've been using IAB in my app for several months now and I've noticed some of the signed data coming from IAB looks like this. (Note I removed the signature for brevity).

{"signedData":"{\"nonce\":-5355169768522252731,\"orders\":[]}","signature":"xxx...."}

Notice there are no orders in this signed data response. Does anyone know what would cause this message to get sent back from the IAB service? It seems to have no value at all.

Answer 1

Calling restoreTransactions() will result in a message with empty orders if the users has not purchased anything.