Channel reestablish: wait for/send error message when behind #7625
Description
Upon channel reestablishment, if a peer is behind the state it should be, the other peer force closes on the late peer.
There are discussions about the order of events and error messages:
lightning/bolts#942
lightning/bolts#932
If I understand correctly, the late peer should first send an error message and only then, the ahead peer closes. We neither send error messages nor wait on receiving them:
Line 1059 in bdbd593