test: allow empty change request (#398)

* allow empty reqs

* Fix license

2 files changed, 3 insertions, 16 deletions

diff --git a/core/test/state.go b/core/test/state.go
index a1af47c..e943a8a 100644
--- a/core/test/state.go
+++ b/core/test/state.go
@@ -532,6 +532,9 @@ func (req reqByTime) Less(i, j int) bool {
 // Apply change requests, this function would also
 // be called when we extract these request from delivered blocks.
 func (s *State) Apply(reqsAsBytes []byte) (err error) {
+	if len(reqsAsBytes) == 0 {
+		return
+	}
 	// Try to unmarshal this byte stream into []*StateChangeRequest.
 	reqs, err := s.unpackRequests(reqsAsBytes)
 	if err != nil {
diff --git a/core/utils/utils.go b/core/utils/utils.go
index 687d0ea..8c9f77a 100644
--- a/core/utils/utils.go
+++ b/core/utils/utils.go
@@ -15,22 +15,6 @@
 // along with the dexon-consensus library. If not, see
 // <http://www.gnu.org/licenses/>.
 
-// This file is part of the dexon-consensus library.
-//
-// The dexon-consensus library 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.
-//
-// The dexon-consensus library 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 the dexon-consensus library. If not, see
-// <http://www.gnu.org/licenses/>.
-
 package utils
 
 import (