diff --git a/api/ndf.go b/api/ndf.go
index 09d74b615706cf506323f7b7d74b04da65579758..efe7e86ae0c6b0f38c3be734c7623e99a6e92823 100644
--- a/api/ndf.go
+++ b/api/ndf.go
@@ -1,3 +1,10 @@
+///////////////////////////////////////////////////////////////////////////////
+// Copyright © 2020 xx network SEZC                                          //
+//                                                                           //
+// Use of this source code is governed by a license that can be found in the //
+// LICENSE file                                                              //
+///////////////////////////////////////////////////////////////////////////////
+
 package api
 
 import (