electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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commit 526c75ad537b1062292c557d07a7ed342a5e6a22
parent ac67f7ae30b2a84d7a1ce44bcb03e4b20292a443
Author: ThomasV <thomasv@electrum.org>
Date:   Sun, 10 May 2020 12:36:02 +0200

lnrouter: blacklist channels for a limited time (see #6124)

Diffstat:
Melectrum/lnrouter.py | 16++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/electrum/lnrouter.py b/electrum/lnrouter.py @@ -26,7 +26,7 @@ import queue from collections import defaultdict from typing import Sequence, List, Tuple, Optional, Dict, NamedTuple, TYPE_CHECKING, Set - +import time import attr from .util import bh2u, profiler @@ -135,16 +135,24 @@ def is_fee_sane(fee_msat: int, *, payment_amount_msat: int) -> bool: return False +BLACKLIST_DURATION = 3600 + class LNPathFinder(Logger): def __init__(self, channel_db: ChannelDB): Logger.__init__(self) self.channel_db = channel_db - self.blacklist = set() + self.blacklist = dict() # short_chan_id -> timestamp def add_to_blacklist(self, short_channel_id: ShortChannelID): self.logger.info(f'blacklisting channel {short_channel_id}') - self.blacklist.add(short_channel_id) + now = int(time.time()) + self.blacklist[short_channel_id] = now + + def is_blacklisted(self, short_channel_id: ShortChannelID) -> bool: + now = int(time.time()) + t = self.blacklist.get(short_channel_id, 0) + return now - t < BLACKLIST_DURATION def _edge_cost(self, short_channel_id: bytes, start_node: bytes, end_node: bytes, payment_amt_msat: int, ignore_costs=False, is_mine=False, *, @@ -221,7 +229,7 @@ class LNPathFinder(Logger): continue for edge_channel_id in self.channel_db.get_channels_for_node(edge_endnode, my_channels=my_channels): assert isinstance(edge_channel_id, bytes) - if edge_channel_id in self.blacklist: + if self.is_blacklisted(edge_channel_id): continue channel_info = self.channel_db.get_channel_info(edge_channel_id, my_channels=my_channels) edge_startnode = channel_info.node2_id if channel_info.node1_id == edge_endnode else channel_info.node1_id