Improve network graph update logging.

diff --git a/lightning/src/routing/gossip.rs b/lightning/src/routing/gossip.rs
index b9b70e0a03165e49f71f7f8c9bf185fd0388d7a2..64dbb45888b338177f54f662efc0647e620a7c49 100644 (file)
--- a/lightning/src/routing/gossip.rs
+++ b/lightning/src/routing/gossip.rs
@@ -1553,6 +1553,8 @@ impl<L: Deref> NetworkGraph<L> where L::Target: Logger {
                let node_id_a = channel_info.node_one.clone();
                let node_id_b = channel_info.node_two.clone();
 
+               log_gossip!(self.logger, "Adding channel {} between nodes {} and {}", short_channel_id, node_id_a, node_id_b);
+
                match channels.entry(short_channel_id) {
                        IndexedMapEntry::Occupied(mut entry) => {
                                //TODO: because asking the blockchain if short_channel_id is valid is only optional
@@ -1788,16 +1790,23 @@ impl<L: Deref> NetworkGraph<L> where L::Target: Logger {
                let mut scids_to_remove = Vec::new();
                for (scid, info) in channels.unordered_iter_mut() {
                        if info.one_to_two.is_some() && info.one_to_two.as_ref().unwrap().last_update < min_time_unix {
+                               log_gossip!(self.logger, "Removing directional update one_to_two (0) for channel {} due to its timestamp {} being below {}",
+                                       scid, info.one_to_two.as_ref().unwrap().last_update, min_time_unix);
                                info.one_to_two = None;
                        }
                        if info.two_to_one.is_some() && info.two_to_one.as_ref().unwrap().last_update < min_time_unix {
+                               log_gossip!(self.logger, "Removing directional update two_to_one (1) for channel {} due to its timestamp {} being below {}",
+                                       scid, 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() {
                                // 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.
-                               if info.announcement_received_time < min_time_unix as u64 {
+                               let announcement_received_timestamp = info.announcement_received_time;
+                               if announcement_received_timestamp < min_time_unix as u64 {
+                                       log_gossip!(self.logger, "Removing channel {} because both directional updates are missing and its announcement timestamp {} being below {}",
+                                               scid, announcement_received_timestamp, min_time_unix);
                                        scids_to_remove.push(*scid);
                                }
                        }
@@ -1878,6 +1887,8 @@ impl<L: Deref> NetworkGraph<L> where L::Target: Logger {
                        }
                }
 
+               log_gossip!(self.logger, "Updating channel {} in direction {} with timestamp {}", msg.short_channel_id, msg.flags & 1, msg.timestamp);
+
                let mut channels = self.channels.write().unwrap();
                match channels.get_mut(&msg.short_channel_id) {
                        None => {