diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 1a6c1210e0..dfdc170977 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -74,8 +74,10 @@ SUBCOMMANDS:
 
 func init() {
 	cli.AppHelpTemplate = `{{.Name}} {{if .Flags}}[global options] {{end}}command{{if .Flags}} [command options]{{end}} [arguments...]
+
 VERSION:
    {{.Version}}
+
 COMMANDS:
    {{range .Commands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
    {{end}}{{if .Flags}}
@@ -1084,7 +1086,6 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
 		// TODO(fjl): force-enable this in --dev mode
 		cfg.EnablePreimageRecording = ctx.GlobalBool(VMEnableDebugFlag.Name)
 	}
-
 	if ctx.GlobalIsSet(StoreRewardFlag.Name) {
 		cfg.StoreRewardFolder = filepath.Join(stack.DataDir(), "XDC", "rewards")
 		if _, err := os.Stat(cfg.StoreRewardFolder); os.IsNotExist(err) {
@@ -1314,4 +1315,4 @@ func MigrateFlags(action func(ctx *cli.Context) error) func(*cli.Context) error
 		}
 		return action(ctx)
 	}
-}
\ No newline at end of file
+}
diff --git a/contracts/utils.go b/contracts/utils.go
index 41ee875748..21dd0f799c 100644
--- a/contracts/utils.go
+++ b/contracts/utils.go
@@ -1,3 +1,18 @@
+// Copyright (c) 2018 XDCchain
+//
+// This program 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.
+//
+// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
 package contracts
 
 import (
@@ -298,7 +313,8 @@ func GetRewardForCheckpoint(chain consensus.ChainReader, blockSignerAddr common.
 			block := chain.GetHeaderByNumber(i)
 			addrs, err := GetSignersFromContract(blockSignerAddr, client, block.Hash())
 			if err != nil {
-				log.Crit("Fail to get signers from smartcontract.", "error", err, "blockNumber", i)
+				log.Error("Fail to get signers from smartcontract.", "error", err, "blockNumber", i)
+				return nil, err
 			}
 			// Filter duplicate address.
 			if len(addrs) > 0 {
@@ -395,7 +411,8 @@ func GetRewardBalancesRate(foudationWalletAddr common.Address, masterAddr common
 	opts := new(bind.CallOpts)
 	voters, err := validator.GetVoters(opts, masterAddr)
 	if err != nil {
-		log.Crit("Fail to get voters", "error", err)
+		log.Error("Fail to get voters", "error", err)
+		return nil, err
 	}
 
 	if len(voters) > 0 {
@@ -407,7 +424,8 @@ func GetRewardBalancesRate(foudationWalletAddr common.Address, masterAddr common
 		for _, voteAddr := range voters {
 			voterCap, err := validator.GetVoterCap(opts, masterAddr, voteAddr)
 			if err != nil {
-				log.Crit("Fail to get vote capacity", "error", err)
+				log.Error("Fail to get vote capacity", "error", err)
+				return nil, err
 			}
 
 			totalCap.Add(totalCap, voterCap)
@@ -538,4 +556,4 @@ func isInt(strNumber string) bool {
 	} else {
 		return false
 	}
-}
\ No newline at end of file
+}
diff --git a/contracts/utils_test.go b/contracts/utils_test.go
index 48b1e7e409..f51b3f1f75 100644
--- a/contracts/utils_test.go
+++ b/contracts/utils_test.go
@@ -1,3 +1,18 @@
+// Copyright (c) 2018 XDCchain
+//
+// This program 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.
+//
+// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
 package contracts
 
 import (
@@ -193,4 +208,4 @@ func TestDecodeValidatorsHexData(t *testing.T) {
 		t.Errorf("Fail to get m2 result %v", b)
 	}
 	t.Log("b", b)
-}
\ No newline at end of file
+}