add public sync_rgs with do_full_sync param to reset rgs snapshot

src/gossip.rs

@@ -82,11 +82,15 @@ impl GossipSource {
 		}
 	}
 
-	pub async fn update_rgs_snapshot(&self) -> Result<u32, Error> {
+	pub async fn update_rgs_snapshot(&self, do_full_sync: bool) -> Result<u32, Error> {
 		match self {
 			Self::P2PNetwork { gossip_sync: _, .. } => Ok(0),
 			Self::RapidGossipSync { gossip_sync, server_url, latest_sync_timestamp, logger } => {
-				let query_timestamp = latest_sync_timestamp.load(Ordering::Acquire);
+				let query_timestamp = if do_full_sync {
+					0
+				} else {
+					latest_sync_timestamp.load(Ordering::Acquire)
+				};
 				let query_url = format!("{}/{}", server_url, query_timestamp);
 
 				let response = tokio::time::timeout(

src/lib.rs

@@ -301,7 +301,7 @@ impl Node {
 						_ = interval.tick() => {
 							let gossip_sync_logger = Arc::clone(&gossip_sync_logger);
 							let now = Instant::now();
-							match gossip_source.update_rgs_snapshot().await {
+							match gossip_source.update_rgs_snapshot(false).await {
 								Ok(updated_timestamp) => {
 									log_trace!(
 										gossip_sync_logger,
@@ -1360,6 +1360,24 @@ impl Node {
 		})
 	}
 
+	/// Manually sync the RGS snapshot.
+	///
+	/// If `do_full_sync` is true, the RGS snapshot will be updated from scratch. Otherwise, the
+	/// snapshot will be updated from the last known sync point.
+	pub async fn sync_rgs(&self, do_full_sync: bool) -> Result<u32, Error> {
+		let updated_timestamp = self.gossip_source.update_rgs_snapshot(do_full_sync).await?;
+
+		let mut locked_node_metrics = self.node_metrics.write().unwrap();
+		locked_node_metrics.latest_rgs_snapshot_timestamp = Some(updated_timestamp);
+		write_node_metrics(
+			&*locked_node_metrics,
+			Arc::clone(&self.kv_store),
+			Arc::clone(&self.logger),
+		)?;
+
+		Ok(updated_timestamp)
+	}
+
 	/// Close a previously opened channel.
 	///
 	/// Will attempt to close a channel coopertively. If this fails, users might need to resort to