Allows Libp2p service to be read outside network thread

beacon_node/eth2-libp2p/src/behaviour.rs

@@ -171,6 +171,11 @@ impl<TSubstream: AsyncRead + AsyncWrite> Behaviour<TSubstream> {
     pub fn send_rpc(&mut self, peer_id: PeerId, rpc_event: RPCEvent) {
         self.serenity_rpc.send_rpc(peer_id, rpc_event);
     }
+
+    /* Discovery / Peer management functions */
+    pub fn connected_peers(&self) -> usize {
+        self.discovery.connected_peers()
+    }
 }
 
 /// The types of events than can be obtained from polling the behaviour.

beacon_node/eth2-libp2p/src/discovery.rs

@@ -106,6 +106,11 @@ impl<TSubstream> Discovery<TSubstream> {
         self.discovery.add_enr(enr);
     }
 
+    /// The current number of connected libp2p peers.
+    pub fn connected_peers(&self) -> usize {
+        self.connected_peers.len()
+    }
+
     /// Search for new peers using the underlying discovery mechanism.
     fn find_peers(&mut self) {
         // pick a random NodeId