512 - No such transfer
513 - Not supported for this fnet
514 - No such search
+515 - Quota exceeded
+516 - Duplicate recipient
+517 - No such recipient
+518 - Recipient not listening
600 - Chat receipt
601 - FN state change
614 - Transfer error update
615 - Transfer progress
616 - Transfer path change
+617 - Transfer destroy
+618 - Transfer hash update
620 - Search ETA change
621 - Search commit
622 - Search result
+630 - Peer create
+631 - Peer delete
+632 - Peer change
+640 - Client-to-client message