Peer added fix (#552)

* peer added fix

pkg/p2p/libp2p/peer.go

@@ -131,19 +131,19 @@ func (r *peerRegistry) addIfNotExists(c network.Conn, overlay swarm.Address) (ex
 	r.mu.Lock()
 	defer r.mu.Unlock()
 
+	if _, exists := r.underlays[overlay.ByteString()]; exists {
+		return true
+	}
+
 	if _, ok := r.connections[peerID]; !ok {
 		r.connections[peerID] = make(map[network.Conn]struct{})
 	}
 	r.connections[peerID][c] = struct{}{}
 	r.streams[peerID] = make(map[network.Stream]context.CancelFunc)
+	r.underlays[overlay.ByteString()] = peerID
+	r.overlays[peerID] = overlay
+	return false
 
-	if _, exists := r.underlays[overlay.ByteString()]; !exists {
-		r.underlays[overlay.ByteString()] = peerID
-		r.overlays[peerID] = overlay
-		return false
-	}
-
-	return true
 }
 
 func (r *peerRegistry) peerID(overlay swarm.Address) (peerID libp2ppeer.ID, found bool) {