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lnbase: remove code duplication by introducing send_commitment(chan)

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Janus 2018-09-27 20:27:52 +02:00 • committed by SomberNight
parent da684b2e97
commit c8a00f7ccf
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1 changed files with 10 additions and 28 deletions
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38
electrum/lnbase.py
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@ -13,7 +13,6 @@ from .bitcoin import COIN
from ecdsa.util import sigdecode_der, sigencode_string_canonize, sigdecode_string
import queue
import traceback
import json
import asyncio
from concurrent.futures import FIRST_COMPLETED
@ -830,22 +829,24 @@ class Peer(PrintError):
print("HTLC failure with code {} ({})".format(code, code_name))
chan = self.channels[channel_id]
sig_64, htlc_sigs = chan.sign_next_commitment()
self.send_message(gen_msg("commitment_signed", channel_id=chan.channel_id, signature=sig_64, num_htlcs=len(htlc_sigs), htlc_signature=b"".join(htlc_sigs)))
self.send_commitment(chan)
await self.receive_revoke(chan)
chan.receive_fail_htlc(htlc_id)
await self.receive_commitment(chan)
self.revoke(chan)
sig_64, htlc_sigs = chan.sign_next_commitment()
self.send_message(gen_msg("commitment_signed", channel_id=chan.channel_id, signature=sig_64, num_htlcs=0))
self.send_commitment(chan) # htlc will be removed
await self.receive_revoke(chan)
self.lnworker.save_channel(chan)
def send_commitment(self, chan):
sig_64, htlc_sigs = chan.sign_next_commitment()
self.send_message(gen_msg("commitment_signed", channel_id=chan.channel_id, signature=sig_64, num_htlcs=len(htlc_sigs), htlc_signature=b"".join(htlc_sigs)))
return len(htlc_sigs)
async def update_channel(self, chan, update):
""" generic channel update flow """
self.send_message(update)
sig_64, htlc_sigs = chan.sign_next_commitment()
self.send_message(gen_msg("commitment_signed", channel_id=chan.channel_id, signature=sig_64, num_htlcs=len(htlc_sigs), htlc_signature=b"".join(htlc_sigs)))
self.send_commitment(chan)
await self.receive_revoke(chan)
await self.receive_commitment(chan)
self.revoke(chan)
@ -917,29 +918,18 @@ class Peer(PrintError):
expected_received_msat = int(decoded.amount * bitcoin.COIN * 1000)
htlc_id = int.from_bytes(htlc["id"], 'big')
assert htlc_id == chan.remote_state.next_htlc_id, (htlc_id, chan.remote_state.next_htlc_id)
assert chan.get_state() == "OPEN"
cltv_expiry = int.from_bytes(htlc["cltv_expiry"], 'big')
# TODO verify sanity of their cltv expiry
amount_msat = int.from_bytes(htlc["amount_msat"], 'big')
assert amount_msat == expected_received_msat
payment_hash = htlc["payment_hash"]
htlc = {'amount_msat': amount_msat, 'payment_hash':payment_hash, 'cltv_expiry':cltv_expiry}
chan.receive_htlc(htlc)
assert (await self.receive_commitment(chan)) <= 1
self.revoke(chan)
sig_64, htlc_sigs = chan.sign_next_commitment()
htlc_sig = b''.join(htlc_sigs)
self.send_message(gen_msg("commitment_signed", channel_id=channel_id, signature=sig_64, num_htlcs=len(htlc_sigs), htlc_signature=htlc_sig))
self.send_commitment(chan)
await self.receive_revoke(chan)
chan.settle_htlc(payment_preimage, htlc_id)
fulfillment = gen_msg("update_fulfill_htlc", channel_id=channel_id, id=htlc_id, payment_preimage=payment_preimage)
await self.update_channel(chan, fulfillment)
@ -963,17 +953,9 @@ class Peer(PrintError):
htlc_id = int.from_bytes(update_fulfill_htlc_msg["id"], "big")
htlc = chan.lookup_htlc(chan.log[LOCAL], htlc_id)
chan.receive_htlc_settle(preimage, htlc_id)
msat_local = chan.balance(LOCAL) - htlc.amount_msat
msat_remote = chan.balance(REMOTE) + htlc.amount_msat
await self.receive_commitment(chan)
self.revoke(chan)
# FIXME why is this not using the HTLC state machine?
bare_ctx = chan.make_commitment(chan.remote_state.ctn + 1, False, chan.remote_state.next_per_commitment_point,
msat_remote, msat_local)
self.lnwatcher.process_new_offchain_ctx(chan, bare_ctx, ours=False)
sig_64 = sign_and_get_sig_string(bare_ctx, chan.local_config, chan.remote_config)
self.send_message(gen_msg("commitment_signed", channel_id=chan.channel_id, signature=sig_64, num_htlcs=0))
self.send_commitment(chan) # htlc will be removed
await self.receive_revoke(chan)
self.lnworker.save_channel(chan)