Filter NodeAnnouncement gossip by timestamp.

Author: arik-so

lightning/src/ln/peer_handler.rs

@@ -1270,7 +1270,12 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
 					InitSyncTracker::ChannelsSyncing(_) => unreachable!(),
 					InitSyncTracker::NodesSyncing(sync_node_id) => {
 						if let Some(msg) = self.message_handler.route_handler.get_next_node_announcement(Some(&sync_node_id)) {
-							self.enqueue_message(peer, &msg);
+							let (min, max) = peer.sent_gossip_timestamp_filter.as_ref().map_or((0, u32::MAX), |f| {
+								(f.first_timestamp, f.first_timestamp.saturating_add(f.timestamp_range))
+							});
+							if msg.contents.timestamp >= min && msg.contents.timestamp < max {
+								self.enqueue_message(peer, &msg);
+							}
 							peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
 						} else {
 							peer.sync_status = InitSyncTracker::NoSyncRequested;