tdefine channel.has_pending_changes method - electrum - Electrum Bitcoin wallet
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---
DIR commit 87fe2c7d7adfb3205c3136a90b3fb65749f232a6
DIR parent 1c5dc7929838fbb7307faeac6506c95821002049
HTML Author: ThomasV <thomasv@electrum.org>
Date: Wed, 26 Feb 2020 19:08:48 +0100
define channel.has_pending_changes method
Diffstat:
M electrum/lnchannel.py | 5 +++++
M electrum/lnpeer.py | 18 +++++-------------
2 files changed, 10 insertions(+), 13 deletions(-)
---
DIR diff --git a/electrum/lnchannel.py b/electrum/lnchannel.py
t@@ -885,3 +885,8 @@ class Channel(Logger):
def sweep_htlc(self, ctx:Transaction, htlc_tx: Transaction):
# look at the output address, check if it matches
return create_sweeptx_for_their_revoked_htlc(self, ctx, htlc_tx, self.sweep_address)
+
+ def has_pending_changes(self, subject):
+ next_htlcs = self.hm.get_htlcs_in_next_ctx(subject)
+ latest_htlcs = self.hm.get_htlcs_in_latest_ctx(subject)
+ return not (next_htlcs == latest_htlcs and self.get_next_feerate(subject) == self.get_latest_feerate(subject))
DIR diff --git a/electrum/lnpeer.py b/electrum/lnpeer.py
t@@ -1011,16 +1011,12 @@ class Peer(Logger):
def maybe_send_commitment(self, chan: Channel):
# REMOTE should revoke first before we can sign a new ctx
if chan.hm.is_revack_pending(REMOTE):
- return False
+ return
# if there are no changes, we will not (and must not) send a new commitment
- next_htlcs, latest_htlcs = chan.hm.get_htlcs_in_next_ctx(REMOTE), chan.hm.get_htlcs_in_latest_ctx(REMOTE)
- if next_htlcs == latest_htlcs and chan.get_next_feerate(REMOTE) == chan.get_latest_feerate(REMOTE):
- return False
- self.logger.info(f'send_commitment. chan {chan.short_channel_id}. ctn: {chan.get_next_ctn(REMOTE)}. '
- f'old number htlcs: {len(latest_htlcs)}, new number htlcs: {len(next_htlcs)}')
+ if not chan.has_pending_changes(REMOTE):
+ return
sig_64, htlc_sigs = chan.sign_next_commitment()
self.send_message("commitment_signed", channel_id=chan.channel_id, signature=sig_64, num_htlcs=len(htlc_sigs), htlc_signature=b"".join(htlc_sigs))
- return True
async def await_remote(self, chan: Channel, ctn: int):
"""Wait until remote 'ctn' gets revoked."""
t@@ -1084,11 +1080,7 @@ class Peer(Logger):
if chan.peer_state == peer_states.BAD:
return
# make sure there were changes to the ctx, otherwise the remote peer is misbehaving
- next_htlcs, latest_htlcs = chan.hm.get_htlcs_in_next_ctx(LOCAL), chan.hm.get_htlcs_in_latest_ctx(LOCAL)
- self.logger.info(f'on_commitment_signed. chan {chan.short_channel_id}. ctn: {chan.get_next_ctn(LOCAL)}. '
- f'old number htlcs: {len(latest_htlcs)}, new number htlcs: {len(next_htlcs)}')
- if (next_htlcs == latest_htlcs
- and chan.get_next_feerate(LOCAL) == chan.get_latest_feerate(LOCAL)):
+ if not chan.has_pending_changes(LOCAL):
# TODO if feerate changed A->B->A; so there were updates but the value is identical,
# then it might be legal to send a commitment_signature
# see https://github.com/lightningnetwork/lightning-rfc/pull/618
t@@ -1380,7 +1372,7 @@ class Peer(Logger):
# wait until no more pending updates (bolt2)
# TODO: stop sending updates during that time
ctn = chan.get_latest_ctn(REMOTE)
- if self.maybe_send_commitment(chan):
+ if chan.has_pending_changes(REMOTE):
await self.await_remote(chan, ctn)
self.send_message('shutdown', channel_id=chan.channel_id, len=len(scriptpubkey), scriptpubkey=scriptpubkey)
chan.set_state(channel_states.CLOSING)