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-rw-r--r--whisper/topic.go16
1 files changed, 16 insertions, 0 deletions
diff --git a/whisper/topic.go b/whisper/topic.go
index c47c94ae1..fa39dd025 100644
--- a/whisper/topic.go
+++ b/whisper/topic.go
@@ -1,3 +1,19 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
// Contains the Whisper protocol Topic element. For formal details please see
// the specs at https://github.com/ethereum/wiki/wiki/Whisper-PoC-1-Protocol-Spec#topics.