diff --git a/interfaces/ephemeral.go b/interfaces/ephemeral.go
index f2b18567b0ada5cba3aa318214af7632dc3ca227..4d0e7f926f5a3a863a49a51e499dbde5146d7f94 100644
--- a/interfaces/ephemeral.go
+++ b/interfaces/ephemeral.go
@@ -1,3 +1,11 @@
+////////////////////////////////////////////////////////////////////////////////
+// Copyright © 2020 xx network SEZC                                           //
+//                                                                            //
+// Use of this source code is governed by a license that can be found in the  //
+// LICENSE file                                                               //
+////////////////////////////////////////////////////////////////////////////////
+
 package interfaces
 
+// DefaultExtraChecks is the default value for ExtraChecks on reception.Identity
 const DefaultExtraChecks = 10