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Do not fail to apply RGS updates for removed channels

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If we receive a Rapid Gossip Sync update for channels where we are
missing the existing channel data, we should ignore the missing
channel. This can happen in a number of cases, whether because we
received updated channel information via an onion error from an
HTLC failure or because we've partially synced the graph from a
peer over the standard lightning P2P protocol.
This commit is contained in:
Matt Corallo 2023-02-23 19:06:21 +00:00
parent b5e5435c4e
commit b8eecd1fd8
1 changed files with 6 additions and 32 deletions
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38
lightning-rapid-gossip-sync/src/processing.rs
View file

@ -169,23 +169,15 @@ impl<NG: Deref<Target=NetworkGraph<L>>, L: Deref> RapidGossipSync<NG, L> where L
if (channel_flags & 0b_1000_0000) != 0 {
// incremental update, field flags will indicate mutated values
let read_only_network_graph = network_graph.read_only();
if let Some(channel) = read_only_network_graph
.channels()
.get(&short_channel_id) {
let directional_info = channel
.get_directional_info(channel_flags)
.ok_or(LightningError {
err: "Couldn't find previous directional data for update".to_owned(),
action: ErrorAction::IgnoreError,
})?;
if let Some(directional_info) =
read_only_network_graph.channels().get(&short_channel_id)
.and_then(|channel| channel.get_directional_info(channel_flags))
{
synthetic_update.cltv_expiry_delta = directional_info.cltv_expiry_delta;
synthetic_update.htlc_minimum_msat = directional_info.htlc_minimum_msat;
synthetic_update.htlc_maximum_msat = directional_info.htlc_maximum_msat;
synthetic_update.fee_base_msat = directional_info.fees.base_msat;
synthetic_update.fee_proportional_millionths = directional_info.fees.proportional_millionths;
} else {
skip_update_for_unknown_channel = true;
}
@ -341,16 +333,7 @@ mod tests {
assert_eq!(network_graph.read_only().channels().len(), 0);
let rapid_sync = RapidGossipSync::new(&network_graph);
let update_result = rapid_sync.update_network_graph(&announced_update_input[..]);
assert!(update_result.is_err());
if let Err(GraphSyncError::LightningError(lightning_error)) = update_result {
assert_eq!(
lightning_error.err,
"Couldn't find previous directional data for update"
);
} else {
panic!("Unexpected update result: {:?}", update_result)
}
rapid_sync.update_network_graph(&announced_update_input[..]).unwrap();
}
#[test]
@ -405,16 +388,7 @@ mod tests {
0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 8, 153, 192, 0, 2, 27, 0, 0, 136, 0, 0, 0, 221, 255, 2,
68, 226, 0, 6, 11, 0, 1, 128,
];
let update_result = rapid_sync.update_network_graph(&opposite_direction_incremental_update_input[..]);
assert!(update_result.is_err());
if let Err(GraphSyncError::LightningError(lightning_error)) = update_result {
assert_eq!(
lightning_error.err,
"Couldn't find previous directional data for update"
);
} else {
panic!("Unexpected update result: {:?}", update_result)
}
rapid_sync.update_network_graph(&opposite_direction_incremental_update_input[..]).unwrap();
}
#[test]