mqtt: send packets after they are encrypted

src/mqtt/MQTT.h

@@ -3,6 +3,7 @@
 #include "configuration.h"
 
 #include "concurrency/OSThread.h"
+#include "mesh/Channels.h"
 #include <PubSubClient.h>
 #include <WiFiClient.h>
 
@@ -23,8 +24,13 @@ class MQTT : private concurrency::OSThread
 
     /**
      * Publish a packet on the glboal MQTT server.
+     * This hook must be called **after** the packet is encrypted (including the channel being changed to a hash).
+     * @param chIndex the index of the channel for this message
+     *
+     * Note: for messages we are forwarding on the mesh that we can't find the channel for (because we don't have the keys), we
+     * can not forward those messages to the cloud - becuase no way to find a global channel ID.
      */
-    void publish(const MeshPacket &mp);
+    void onSend(const MeshPacket &mp, ChannelIndex chIndex);
 
   protected:
     virtual int32_t runOnce();