AaronFiore/electrum
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Perform breach remedy without sweepstore:

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- add functions to lnsweep
 - lnworker: analyze candidate ctx and htlc_tx
 - watchtower will be optional
 - add test for breach remedy with spent htlcs
 - save tx name as label
This commit is contained in:
ThomasV
2019-06-24 11:13:18 +02:00
parent 238f3c949c
commit a8ce8109be
8 changed files with 280 additions and 95 deletions
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12
electrum/lnpeer.py
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@@ -40,6 +40,7 @@ from .lnutil import (Outpoint, LocalConfig, RECEIVED, UpdateAddHtlc,
LightningPeerConnectionClosed, HandshakeFailed, NotFoundChanAnnouncementForUpdate,
MINIMUM_MAX_HTLC_VALUE_IN_FLIGHT_ACCEPTED, MAXIMUM_HTLC_MINIMUM_MSAT_ACCEPTED,
MAXIMUM_REMOTE_TO_SELF_DELAY_ACCEPTED, RemoteMisbehaving, DEFAULT_TO_SELF_DELAY)
from .lnsweep import create_sweeptxs_for_watchtower
from .lntransport import LNTransport, LNTransportBase
from .lnmsg import encode_msg, decode_msg
from .interface import GracefulDisconnect
@@ -1261,15 +1262,20 @@ class Peer(Logger):
self.logger.info("on_revoke_and_ack")
channel_id = payload["channel_id"]
chan = self.channels[channel_id]
sweeptxs = chan.receive_revocation(RevokeAndAck(payload["per_commitment_secret"], payload["next_per_commitment_point"]))
ctx = chan.remote_commitment_to_be_revoked # FIXME can't we just reconstruct it?
rev = RevokeAndAck(payload["per_commitment_secret"], payload["next_per_commitment_point"])
chan.receive_revocation(rev)
self._remote_changed_events[chan.channel_id].set()
self._remote_changed_events[chan.channel_id].clear()
self.lnworker.save_channel(chan)
self.maybe_send_commitment(chan)
asyncio.ensure_future(self._on_revoke_and_ack(chan, sweeptxs))
asyncio.ensure_future(self._on_revoke_and_ack(chan, ctx, rev.per_commitment_secret))
async def _on_revoke_and_ack(self, chan, sweeptxs):
@ignore_exceptions
@log_exceptions
async def _on_revoke_and_ack(self, chan, ctx, per_commitment_secret):
outpoint = chan.funding_outpoint.to_str()
sweeptxs = create_sweeptxs_for_watchtower(chan, ctx, per_commitment_secret, chan.sweep_address)
for tx in sweeptxs:
await self.lnwatcher.add_sweep_tx(outpoint, tx.prevout(0), str(tx))