diff --git a/eth/api_backend.go b/eth/api_backend.go
index 24c78048c3..97dfea2873 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -18,8 +18,10 @@ package eth
 
 import (
 	"context"
-	"github.com/ethereum/go-ethereum/consensus/XDPoS"
+	"encoding/json"
+	"io/ioutil"
 	"math/big"
+	"path/filepath"
 
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
@@ -236,10 +238,24 @@ func (b *EthApiBackend) GetEngine() consensus.Engine {
 }
 
 func (s *EthApiBackend) GetRewardByHash(hash common.Hash) map[string]interface{} {
-	if c, ok := s.eth.Engine().(*XDPoS.XDPoS); ok {
-		rewards := c.GetRewards(hash)
-		if rewards != nil {
-			return rewards
+	header := s.eth.blockchain.GetHeaderByHash(hash)
+	if header != nil {
+		data, err := ioutil.ReadFile(filepath.Join(common.StoreRewardFolder, header.Number.String()+"."+header.Hash().Hex()))
+		if err == nil {
+			rewards := make(map[string]interface{})
+			err = json.Unmarshal(data, &rewards)
+			if err == nil {
+				return rewards
+			}
+		} else {
+			data, err = ioutil.ReadFile(filepath.Join(common.StoreRewardFolder, header.Number.String()+"."+header.HashNoValidator().Hex()))
+			if err == nil {
+				rewards := make(map[string]interface{})
+				err = json.Unmarshal(data, &rewards)
+				if err == nil {
+					return rewards
+				}
+			}
 		}
 	}
 	return make(map[string]interface{})
diff --git a/eth/config.go b/eth/config.go
index 6f0d58955e..dbfe973913 100644
--- a/eth/config.go
+++ b/eth/config.go
@@ -114,8 +114,6 @@ type Config struct {
 
 	// Miscellaneous options
 	DocRoot string `toml:"-"`
-
-	StoreRewardFolder string
 }
 
 type configMarshaling struct {
diff --git a/eth/downloader/.goutputstream-OL09XZ b/eth/downloader/.goutputstream-OL09XZ
deleted file mode 100644
index d4eb337946..0000000000
--- a/eth/downloader/.goutputstream-OL09XZ
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2015 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-// Contains the metrics collected by the downloader.
-
-package downloader
-
-import (
-	"github.com/ethereum/go-ethereum/metrics"
-)
-
-var (
-	headerInMeter      = metrics.NewRegisteredMeter("eth/downloader/headers/in", nil)
-	headerReqTimer     = metrics.NewRegisteredTimer("eth/downloader/headers/req", nil)
-	headerDropMeter    = metrics.NewRegisteredMeter("eth/downloader/headers/drop", nil)
-	headerTimeoutMeter = metrics.NewRegisteredMeter("eth/downloader/headers/timeout", nil)
-
-	bodyInMeter      = metrics.NewRegisteredMeter("eth/downloader/bodies/in", nil)
-	bodyReqTimer     = metrics.NewRegisteredTimer("eth/downloader/bodies/req", nil)
-	bodyDropMeter    = metrics.NewRegisteredMeter("eth/downloader/bodies/drop", nil)
-	bodyTimeoutMeter = metrics.NewRegisteredMeter("eth/downloader/bodies/timeout", nil)
-
-	receiptInMeter      = metrics.NewRegisteredMeter("eth/downloader/receipts/in", nil)
-	receiptReqTimer     = metrics.NewRegisteredTimer("eth/downloader/receipts/req", nil)
-	receiptDropMeter    = metrics.NewRegisteredMeter("eth/downloader/receipts/drop", nil)
-	receiptTimeoutMeter = metrics.NewRegisteredMeter("eth/downloader/receipts/timeout", nil)
-
-	stateInMeter   = metrics.NewRegisteredMeter("eth/downloader/states/in", nil)
-	stateDropMeter = metrics.NewRegisteredMeter("eth/downloader/states/drop", nil)
-)
diff --git a/eth/gasprice/gasprice.go b/eth/gasprice/gasprice.go
index 0fe0f3c513..f29d5a31c9 100644
--- a/eth/gasprice/gasprice.go
+++ b/eth/gasprice/gasprice.go
@@ -30,7 +30,6 @@ import (
 )
 
 var maxPrice = big.NewInt(500 * params.Shannon)
-var minPrice = big.NewInt(common.MinGasPrice)
 
 type Config struct {
 	Blocks     int
@@ -142,8 +141,9 @@ func (gpo *Oracle) SuggestPrice(ctx context.Context) (*big.Int, error) {
 	}
 
 	// Check gas price min.
-	if price.Cmp(minPrice) < 0 {
-		price = new(big.Int).Set(minPrice)
+	minGasPrice := big.NewInt(common.MinGasPrice)
+	if price.Cmp(minGasPrice) < 0 {
+		price = new(big.Int).Set(minGasPrice)
 	}
 
 	gpo.cacheLock.Lock()