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handle failing htlc after restart

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SomberNight 2018-10-09 20:37:09 +02:00 • committed by ThomasV
parent eced61123d
commit 864efa029b
1 changed files with 20 additions and 14 deletions
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34
electrum/lnbase.py
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@ -1014,22 +1014,28 @@ class Peer(PrintError):
chan = self.channels[channel_id]
htlc_id = int.from_bytes(payload["id"], "big")
key = (channel_id, htlc_id)
route = self.attempted_route[key]
failure_msg, sender_idx = decode_onion_error(payload["reason"], [x.node_id for x in route], chan.onion_keys[htlc_id])
code = failure_msg.code
code_name = ONION_FAILURE_CODE_MAP.get(code, 'unknown_error!!')
data = failure_msg.data
self.print_error("UPDATE_FAIL_HTLC", code_name, code, data)
try:
short_chan_id = route[sender_idx + 1].short_channel_id
except IndexError:
self.print_error("payment destination reported error")
route = self.attempted_route[key]
except KeyError:
# the remote might try to fail an htlc after we restarted...
# attempted_route is not persisted, so we will get here then
self.print_error("UPDATE_FAIL_HTLC. cannot decode! attempted route is MISSING. {}".format(key))
else:
# TODO this should depend on the error
# also, we need finer blacklisting (directed edges; nodes)
self.network.path_finder.blacklist.add(short_chan_id)
self.print_error("HTLC failure with code {} ({})".format(code, code_name))
failure_msg, sender_idx = decode_onion_error(payload["reason"], [x.node_id for x in route], chan.onion_keys[htlc_id])
code = failure_msg.code
code_name = ONION_FAILURE_CODE_MAP.get(code, 'unknown_error??')
data = failure_msg.data
self.print_error("UPDATE_FAIL_HTLC", code_name, code, data)
try:
short_chan_id = route[sender_idx + 1].short_channel_id
except IndexError:
self.print_error("payment destination reported error")
else:
# TODO this should depend on the error
# also, we need finer blacklisting (directed edges; nodes)
self.network.path_finder.blacklist.add(short_chan_id)
self.print_error("HTLC failure with code {} ({})".format(code, code_name))
# process update_fail_htlc on channel
chan = self.channels[channel_id]
chan.receive_fail_htlc(htlc_id)
await self.receive_commitment(chan)