electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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commit addd8928bfbc864a864602acce041dbc9f03e7e6
parent e5f42a39735f5f73c96b9c83a6b0d7cab5efed5f
Author: Janus <ysangkok@gmail.com>
Date:   Thu, 27 Sep 2018 19:22:18 +0200

lnbase: remove unnecessary branching and duplicated code in receive_commitment_revoke_ack

Diffstat:
Melectrum/lnbase.py | 41+++--------------------------------------
1 file changed, 3 insertions(+), 38 deletions(-)

diff --git a/electrum/lnbase.py b/electrum/lnbase.py @@ -940,44 +940,9 @@ class Peer(PrintError): await self.receive_revoke(chan) - self.send_message(gen_msg("update_fulfill_htlc", channel_id=channel_id, id=htlc_id, payment_preimage=payment_preimage)) - - # remote commitment transaction without htlcs - # 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, - chan.balance(REMOTE) - expected_received_msat, chan.balance(LOCAL) + expected_received_msat) - 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=channel_id, signature=sig_64, num_htlcs=0)) - - revoke_coro = asyncio.ensure_future(self.revoke_and_ack[chan.channel_id].get()) - commit_coro = asyncio.ensure_future(self.commitment_signed[chan.channel_id].get()) - _done, _pending = await asyncio.wait([revoke_coro, commit_coro], return_when=FIRST_COMPLETED) - - def process_revoke(revoke_and_ack_msg): - chan.receive_revocation(RevokeAndAck(revoke_and_ack_msg["per_commitment_secret"], revoke_and_ack_msg["next_per_commitment_point"])) - - if commit_coro.done(): - # this branch is taken with lnd after a fee update (initiated by us, of course) - await self.receive_commitment(chan, commit_coro.result()) - chan.settle_htlc(payment_preimage, htlc_id) - await revoke_coro - process_revoke(revoke_coro.result()) - self.revoke(chan) - 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=len(htlc_sigs), htlc_signature=b"".join(htlc_sigs))) - await self.receive_revoke(chan) - elif revoke_coro.done(): - chan.settle_htlc(payment_preimage, htlc_id) - process_revoke(revoke_coro.result()) - - await commit_coro - await self.receive_commitment(chan, commit_coro.result()) - self.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) self.lnworker.save_channel(chan) def on_commitment_signed(self, payload):