From d8e7d9693e82705c034d5104dccd562ad5f7ce91 Mon Sep 17 00:00:00 2001
From: Wessel Nieboer <wessel@weebl.me>
Date: Tue, 3 Mar 2026 00:37:39 +0100
Subject: [PATCH] clarify this might roll-over

---
 src/helpers/BaseChatMesh.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/helpers/BaseChatMesh.cpp b/src/helpers/BaseChatMesh.cpp
index b6a062937..65633bdfd 100644
--- a/src/helpers/BaseChatMesh.cpp
+++ b/src/helpers/BaseChatMesh.cpp
@@ -1169,7 +1169,7 @@ uint16_t BaseChatMesh::getEncryptionNonceFor(const ContactInfo& contact) {
   uint16_t nonce = 0;
   auto entry = findSessionKey(contact.id.pub_key);
   if (canUseSessionKey(entry)) {
-    ++entry->nonce;
+    ++entry->nonce;  // may reach 65535 → canUseSessionKey() fails next call → falls back to static ECDH
     if (entry->sends_since_last_recv < 255) entry->sends_since_last_recv++;
     session_keys_dirty = true;
     nonce = entry->nonce;