multi: enhance logging for debugging peer connection

peer/brontide.go

@@ -479,7 +479,8 @@ func (p *Brontide) Start() error {
 		return nil
 	}
 
-	peerLog.Tracef("Peer %v starting", p)
+	peerLog.Tracef("Peer %v starting with conn[%v->%v]", p,
+		p.cfg.Conn.LocalAddr(), p.cfg.Conn.RemoteAddr())
 
 	// Fetch and then load all the active channels we have with this remote
 	// peer from the database.

peer/test_utils.go

@@ -521,3 +521,11 @@ func (m *mockMessageConn) ReadNextHeader() (uint32, error) {
 func (m *mockMessageConn) ReadNextBody(buf []byte) ([]byte, error) {
 	return m.curReadMessage, nil
 }
+
+func (m *mockMessageConn) RemoteAddr() net.Addr {
+	return nil
+}
+
+func (m *mockMessageConn) LocalAddr() net.Addr {
+	return nil
+}