From 5243d646f0778621a598e466c79abf6d6b367b16 Mon Sep 17 00:00:00 2001
From: Mark Qvist <bc7291552be7a58f361522990465165c>
Date: Mon, 18 May 2026 14:57:17 +0200
Subject: [PATCH] Improved known destination persist reliability

---
 RNS/Identity.py | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/RNS/Identity.py b/RNS/Identity.py
index e2d1b6bb..78b7a7ed 100644
--- a/RNS/Identity.py
+++ b/RNS/Identity.py
@@ -212,8 +212,17 @@ class Identity:
                     RNS.log("Skipped recombining known destinations from disk, since an error occurred: "+str(e), RNS.LOG_WARNING)
 
             RNS.log("Saving "+str(len(Identity.known_destinations))+" known destinations to storage...", RNS.LOG_VERBOSE)
-            with open(RNS.Reticulum.storagepath+"/known_destinations","wb") as file:
-                umsgpack.dump(Identity.known_destinations.copy(), file)
+            temp_file = RNS.Reticulum.storagepath+f"/known_destinations.tmp.{time.time()}"
+
+            try:
+                with open(temp_file,"wb") as file: umsgpack.dump(Identity.known_destinations.copy(), file)
+                os.rename(temp_file, RNS.Reticulum.storagepath+f"/known_destinations")
+
+            except Exception as e:
+                RNS.log(f"Error while serializing and writing known destinations: {e}", RNS.LOG_ERROR)
+                try: os.unlink(temp_file)
+                except Exception as e: RNS.log(f"Could not clean up temporary file {temp_file}: {e}", RNS.LOG_WARNING)
+                raise e
 
             save_time = time.time() - save_start
             if save_time < 1: time_str = str(round(save_time*1000,2))+"ms"