[TODO] improve axolotl layer exception management about yowsup HOT 2 OPEN

First, I'll debug to find why axolotl generates an "unhandled". I can't see the code now but this message shouldn't happened.
Axolotl layer discards messages with repeated counter. In other case, some on could use old counters (and prekeys) to send a message to you. I agree with you that this exception is excessive. So, I'll try to make it an option with props (exception disabled by default).
Finally, acks are sent to keep alive the app with this kind of exceptions. However you are right and I'll add to props and raise an event in upper layers.

from yowsup.

I understand that accepting random duplicate messages is not a valid solution. However, in case of failure it should be possible (that's the reason the message is resent if we didn't send an ack before).
Is there a way to "undo" the (latest) message in axolotl if we encountered an exception in the handler?

from yowsup.