t_calc_routing_hints_for_invoice: incl max 15 chans to avoid qr overflow - electrum - Electrum Bitcoin wallet
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---
DIR commit 06ea06f7d37a02d7d242d84eca89da3d85191c1b
DIR parent 6f894b9f8885f03203fa4ddf50da795c0c5c6fd1
HTML Author: SomberNight <somber.night@protonmail.com>
Date: Mon, 1 Mar 2021 21:55:41 +0100
_calc_routing_hints_for_invoice: incl max 15 chans to avoid qr overflow
Prioritise channels that are likely to be able to receive the payment.
Diffstat:
M electrum/lnworker.py | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
---
DIR diff --git a/electrum/lnworker.py b/electrum/lnworker.py
t@@ -1797,15 +1797,17 @@ class LNWallet(LNWorker):
"""calculate routing hints (BOLT-11 'r' field)"""
routing_hints = []
channels = list(self.channels.values())
- random.shuffle(channels) # not sure this has any benefit but let's not leak channel order
+ # do minimal filtering of channels.
+ # we include channels that cannot *right now* receive (e.g. peer disconnected or balance insufficient)
+ channels = [chan for chan in channels
+ if (chan.is_open() and not chan.is_frozen_for_receiving())]
+ # cap max channels to include to keep QR code reasonably scannable
+ channels = sorted(channels, key=lambda chan: (not chan.is_active(), -chan.available_to_spend(REMOTE)))
+ channels = channels[:15]
+ random.shuffle(channels) # let's not leak channel order
scid_to_my_channels = {chan.short_channel_id: chan for chan in channels
if chan.short_channel_id is not None}
- # note: currently we add *all* our channels; but this might be a privacy leak?
for chan in channels:
- # do minimal filtering of channels.
- # we include channels that cannot *right now* receive (e.g. peer disconnected or balance insufficient)
- if not (chan.is_open() and not chan.is_frozen_for_receiving()):
- continue
chan_id = chan.short_channel_id
assert isinstance(chan_id, bytes), chan_id
channel_info = get_mychannel_info(chan_id, scid_to_my_channels)