[bug]: LND when run with neutrino does not purge own channels correctly #10333
Description
Pre-Submission Checklist
- I have searched the existing issues and believe this is a new bug.
- I am not asking a question about how to use lnd, but reporting a bug (otherwise open a discussion).
LND Version
20.0
LND Configuration
lnd.conf:
Backend Version
neutriono
Backend Configuration
OS/Distribution
Bug Details & Steps to Reproduce
LND + Neutrino does not correctly remove own channels from the graph.
My assumption is that the channel is closed and we purge it from the graph, but later we receive a gossip message for this channel and it enables the channel in our graph. Now we start sending out ChanUpdates out for it.
This leads to potential disconnects of peers we have channels with.
Seeing a lot of this in my logs:
2025-10-31 09:47:07.861 [WRN] GRDB: Channel=1005150440578678785 not found in graph cache
2025-10-31 09:47:07.861 [INF] DISC: Retransmitting 1 outgoing channels
2025-10-31 09:47:08.051 [WRN] HSWC: ChannelLink(c9fa5892790f0b00a19aefeb5f8fd81bb9d8d7877cf09f88cc700308d4603acc:1): received warning message from peer: chan_id=0000000000000000000000000000000000000000000000000000000000000000, err=channel
_announcement: no unspent txout 914179x3205x1
--
2025-10-31 10:17:07.911 [WRN] GRDB: Channel=991551680702775308 not found in graph cache
2025-10-31 10:17:07.911 [INF] DISC: Retransmitting 1 outgoing channels
2025-10-31 10:17:08.291 [WRN] HSWC: ChannelLink(c9fa5892790f0b00a19aefeb5f8fd81bb9d8d7877cf09f88cc700308d4603acc:1): received warning message from peer: chan_id=0000000000000000000000000000000000000000000000000000000000000000, err=channel_announcement: no unspent txout 901811x2235x12
--
2025-10-31 10:47:07.958 [WRN] GRDB: Channel=988189374137630720 not found in graph cache
2025-10-31 10:47:07.958 [INF] DISC: Retransmitting 1 outgoing channels
2025-10-31 10:47:08.337 [WRN] HSWC: ChannelLink(c9fa5892790f0b00a19aefeb5f8fd81bb9d8d7877cf09f88cc700308d4603acc:1): received warning message from peer: chan_id=0000000000000000000000000000000000000000000000000000000000000000, err=channel_announcement: no unspent txout 898753x2122x0
--
2025-10-31 13:47:08.315 [WRN] GRDB: Channel=889082694535610369 not found in graph cache
2025-10-31 13:47:08.315 [INF] DISC: Retransmitting 1 outgoing channels
2025-10-31 13:47:08.499 [WRN] HSWC: ChannelLink(c9fa5892790f0b00a19aefeb5f8fd81bb9d8d7877cf09f88cc700308d4603acc:1): received warning message from peer: chan_id=0000000000000000000000000000000000000000000000000000000000000000, err=channel_announcement: no unspent txout 808616x1982x1
--
2025-10-31 15:17:08.517 [WRN] GRDB: Channel=959060012579553280 not found in graph cache
2025-10-31 15:17:08.541 [INF] DISC: Retransmitting 5 outgoing channels
2025-10-31 15:17:08.761 [WRN] HSWC: ChannelLink(c9fa5892790f0b00a19aefeb5f8fd81bb9d8d7877cf09f88cc700308d4603acc:1): received warning message from peer: chan_id=0000000000000000000000000000000000000000000000000000000000000000, err=channel_announcement: no unspent txout 749134x723x10
Need to investigate further but putting it out there in case somebody seeing the same problem
Expected Behavior
Debug Information
Environment
No response