Persist NetworkGraph on exit

Author: jurvis

lightning-background-processor/src/lib.rs

@@ -289,6 +289,12 @@ impl BackgroundProcessor {
 					}
 				}
 			}
+
+			// Persist NetworkGraph on exit
+			if let Some(ref handler) = net_graph_msg_handler {
+				persister.persist_graph(handler.network_graph())?;
+			}
+
 			// After we exit, ensure we persist the ChannelManager one final time - this avoids
 			// some races where users quit while channel updates were in-flight, with
 			// ChannelMonitor update(s) persisted without a corresponding ChannelManager update.