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lnpeer: reestablish_channel - discard unsigned remote updates

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SomberNight 2019-08-02 21:00:18 +02:00 • committed by ThomasV
parent c046f2cc1c
commit e81ae1921b
2 changed files with 21 additions and 0 deletions
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19
electrum/lnhtlc.py
View file

@ -167,6 +167,25 @@ class HTLCManager:
if fee_update.ctns[LOCAL] is None and fee_update.ctns[REMOTE] <= self.ctn_latest(REMOTE):
fee_update.ctns[LOCAL] = self.ctn_latest(LOCAL) + 1
def discard_unsigned_remote_updates(self):
"""Discard updates sent by the remote, that the remote itself
did not yet sign (i.e. there was no corresponding commitment_signed msg)
"""
# htlcs
for htlc_id, ctns in list(self.log[REMOTE]['locked_in'].items()):
if ctns[LOCAL] > self.ctn_latest(LOCAL):
del self.log[REMOTE]['locked_in'][htlc_id]
del self.log[REMOTE]['adds'][htlc_id]
self.log[REMOTE]['next_htlc_id'] = max(self.log[REMOTE]['locked_in']) + 1
for log_action in ('settles', 'fails'):
for htlc_id, ctns in list(self.log[LOCAL][log_action].items()):
if ctns[LOCAL] > self.ctn_latest(LOCAL):
del self.log[LOCAL][log_action][htlc_id]
# fee updates
for i, fee_update in enumerate(list(self.log[REMOTE]['fee_updates'])):
if fee_update.ctns[LOCAL] > self.ctn_latest(LOCAL):
del self.log[REMOTE]['fee_updates'][i]
##### Queries re HTLCs:
def htlcs_by_direction(self, subject: HTLCOwner, direction: Direction,

2
electrum/lnpeer.py
View file

@ -692,6 +692,8 @@ class Peer(Logger):
return
chan.set_state('REESTABLISHING')
self.network.trigger_callback('channel', chan)
# BOLT-02: "A node [...] upon disconnection [...] MUST reverse any uncommitted updates sent by the other side"
chan.hm.discard_unsigned_remote_updates()
# ctns
oldest_unrevoked_local_ctn = chan.config[LOCAL].ctn
latest_local_ctn = chan.hm.ctn_latest(LOCAL)