Merge pull request #1743 from tnull/2022-09-channel-events

[rust-lightning] / lightning / src / routing / gossip.rs

diff --git a/lightning/src/routing/gossip.rs b/lightning/src/routing/gossip.rs
index cf7eb38178397e0dee5266f5a9326151c0807f9d..6b0f88d09a26a180431376f4f4a0d3be4204f375 100644 (file)
--- a/lightning/src/routing/gossip.rs
+++ b/lightning/src/routing/gossip.rs
@@ -1653,7 +1653,7 @@ impl<L: Deref> NetworkGraph<L> where L::Target: Logger {
                        if info.two_to_one.is_some() && info.two_to_one.as_ref().unwrap().last_update < min_time_unix {
                                info.two_to_one = None;
                        }
-                       if info.one_to_two.is_none() && info.two_to_one.is_none() {
+                       if info.one_to_two.is_none() || info.two_to_one.is_none() {
                                // We check the announcement_received_time here to ensure we don't drop
                                // announcements that we just received and are just waiting for our peer to send a
                                // channel_update for.
@@ -1667,6 +1667,7 @@ impl<L: Deref> NetworkGraph<L> where L::Target: Logger {
                        for scid in scids_to_remove {
                                let info = channels.remove(&scid).expect("We just accessed this scid, it should be present");
                                Self::remove_channel_in_nodes(&mut nodes, &info, scid);
+                               self.removed_channels.lock().unwrap().insert(scid, Some(current_time_unix));
                        }
                }
 
@@ -2546,23 +2547,43 @@ mod tests {
                assert_eq!(network_graph.read_only().nodes().len(), 2);
 
                network_graph.remove_stale_channels_and_tracking_with_time(101 + STALE_CHANNEL_UPDATE_AGE_LIMIT_SECS);
+               #[cfg(not(feature = "std"))] {
+                       // Make sure removed channels are tracked.
+                       assert_eq!(network_graph.removed_channels.lock().unwrap().len(), 1);
+               }
+               network_graph.remove_stale_channels_and_tracking_with_time(101 + STALE_CHANNEL_UPDATE_AGE_LIMIT_SECS +
+                       REMOVED_ENTRIES_TRACKING_AGE_LIMIT_SECS);
+
                #[cfg(feature = "std")]
                {
                        // In std mode, a further check is performed before fully removing the channel -
                        // the channel_announcement must have been received at least two weeks ago. We
-                       // fudge that here by indicating the time has jumped two weeks. Note that the
-                       // directional channel information will have been removed already..
+                       // fudge that here by indicating the time has jumped two weeks.
                        assert_eq!(network_graph.read_only().channels().len(), 1);
                        assert_eq!(network_graph.read_only().nodes().len(), 2);
-                       assert!(network_graph.read_only().channels().get(&short_channel_id).unwrap().one_to_two.is_none());
 
+                       // Note that the directional channel information will have been removed already..
+                       // We want to check that this will work even if *one* of the channel updates is recent,
+                       // so we should add it with a recent timestamp.
+                       assert!(network_graph.read_only().channels().get(&short_channel_id).unwrap().one_to_two.is_none());
                        use std::time::{SystemTime, UNIX_EPOCH};
                        let announcement_time = SystemTime::now().duration_since(UNIX_EPOCH).expect("Time must be > 1970").as_secs();
+                       let valid_channel_update = get_signed_channel_update(|unsigned_channel_update| {
+                               unsigned_channel_update.timestamp = (announcement_time + 1 + STALE_CHANNEL_UPDATE_AGE_LIMIT_SECS) as u32;
+                       }, node_1_privkey, &secp_ctx);
+                       assert!(gossip_sync.handle_channel_update(&valid_channel_update).is_ok());
+                       assert!(network_graph.read_only().channels().get(&short_channel_id).unwrap().one_to_two.is_some());
                        network_graph.remove_stale_channels_and_tracking_with_time(announcement_time + 1 + STALE_CHANNEL_UPDATE_AGE_LIMIT_SECS);
+                       // Make sure removed channels are tracked.
+                       assert_eq!(network_graph.removed_channels.lock().unwrap().len(), 1);
+                       // Provide a later time so that sufficient time has passed
+                       network_graph.remove_stale_channels_and_tracking_with_time(announcement_time + 1 + STALE_CHANNEL_UPDATE_AGE_LIMIT_SECS +
+                               REMOVED_ENTRIES_TRACKING_AGE_LIMIT_SECS);
                }
 
                assert_eq!(network_graph.read_only().channels().len(), 0);
                assert_eq!(network_graph.read_only().nodes().len(), 0);
+               assert!(network_graph.removed_channels.lock().unwrap().is_empty());
 
                #[cfg(feature = "std")]
                {