diff --git a/backend/common.go b/backend/common.go
index 8f4e0fe..2b55735 100644
--- a/backend/common.go
+++ b/backend/common.go
@@ -18,6 +18,7 @@ package backend
 
 import (
 	"encoding/binary"
+	"strconv"
 )
 
 func uint64ToBytes(i uint64) []byte {
@@ -25,3 +26,7 @@ func uint64ToBytes(i uint64) []byte {
 	binary.BigEndian.PutUint64(buf[:], i)
 	return buf[:]
 }
+
+func uint64ToHex(i uint64) []byte {
+	return []byte(strconv.FormatUint(i, 16))
+}
diff --git a/backend/torrent.go b/backend/torrent.go
index 1aa15ad..b8136f1 100644
--- a/backend/torrent.go
+++ b/backend/torrent.go
@@ -47,14 +47,14 @@ func (fs *ChainDB) SetTorrentProgress(ih string, size uint64) (bool, uint64, err
 		v := buk.Get([]byte(ih))
 
 		if v == nil {
-			err = buk.Put([]byte(ih), []byte(strconv.FormatUint(size, 16)))
+			err = buk.Put([]byte(ih), uint64ToHex(size))
 		} else {
 			s, err := strconv.ParseUint(string(v), 16, 64)
 			if err != nil {
 				return err
 			}
 			if size > s {
-				err = buk.Put([]byte(ih), []byte(strconv.FormatUint(size, 16)))
+				err = buk.Put([]byte(ih), uint64ToHex(size))
 			} else {
 				size = s
 			}
diff --git a/config.go b/config.go
index 2c0b443..912cf50 100644
--- a/config.go
+++ b/config.go
@@ -17,6 +17,7 @@
 package robot
 
 import (
+	"github.com/CortexFoundation/CortexTheseus/metrics"
 	"time"
 )
 
@@ -25,3 +26,10 @@ const (
 	delay   = 12       //params.Delay
 	timeout = 30 * time.Second
 )
+
+var (
+	rpcBlockMeter   = metrics.NewRegisteredMeter("torrent/block/call", nil)
+	rpcCurrentMeter = metrics.NewRegisteredMeter("torrent/current/call", nil)
+	rpcUploadMeter  = metrics.NewRegisteredMeter("torrent/upload/call", nil)
+	rpcReceiptMeter = metrics.NewRegisteredMeter("torrent/receipt/call", nil)
+)
diff --git a/model_srv.go b/model_srv.go
index 7a072f1..f9336d2 100644
--- a/model_srv.go
+++ b/model_srv.go
@@ -79,6 +79,7 @@ func (m *Monitor) parseBlockTorrentInfo(b *types.Block) (bool, error) {
 		start  = mclock.Now()
 		final  []types.Transaction
 	)
+
 	for _, tx := range b.Txs {
 		if meta := tx.Parse(); meta != nil {
 			log.Debug("Data encounter", "ih", meta.InfoHash, "number", b.Number, "meta", meta)
@@ -112,7 +113,7 @@ func (m *Monitor) parseBlockTorrentInfo(b *types.Block) (bool, error) {
 				file.LeftSize = remainingSize
 				if _, progress, err := m.fs.AddFile(file); err != nil {
 					return false, err
-				} else if progress { // && progress {
+				} else if progress {
 					log.Debug("Update storage success", "ih", file.Meta.InfoHash, "left", file.LeftSize)
 					var bytesRequested uint64
 					if file.Meta.RawSize > file.LeftSize {
@@ -134,10 +135,12 @@ func (m *Monitor) parseBlockTorrentInfo(b *types.Block) (bool, error) {
 			final = append(final, tx)
 		}
 	}
+
 	if len(final) > 0 && len(final) < len(b.Txs) {
 		log.Debug("Final txs layout", "total", len(b.Txs), "final", len(final), "num", b.Number, "txs", m.fs.Txs())
 		b.Txs = final
 	}
+
 	if record {
 		if err := m.fs.AddBlock(b); err == nil {
 			log.Info("Root has been changed", "number", b.Number, "hash", b.Hash, "root", m.fs.Root())
@@ -145,9 +148,11 @@ func (m *Monitor) parseBlockTorrentInfo(b *types.Block) (bool, error) {
 			log.Warn("Block added failed", "number", b.Number, "hash", b.Hash, "root", m.fs.Root(), "err", err)
 		}
 	}
+
 	if len(b.Txs) > 0 {
 		elapsed := time.Duration(mclock.Now()) - time.Duration(start)
 		log.Trace("Transactions scanning", "count", len(b.Txs), "number", b.Number, "elapsed", common.PrettyDuration(elapsed))
 	}
+
 	return record, nil
 }
diff --git a/monitor.go b/monitor.go
index 91b5c47..084cfc2 100644
--- a/monitor.go
+++ b/monitor.go
@@ -22,7 +22,6 @@ import (
 	"github.com/CortexFoundation/CortexTheseus/common"
 	"github.com/CortexFoundation/CortexTheseus/common/mclock"
 	"github.com/CortexFoundation/CortexTheseus/log"
-	"github.com/CortexFoundation/CortexTheseus/metrics"
 	"github.com/CortexFoundation/CortexTheseus/rpc"
 	"github.com/CortexFoundation/robot/backend"
 	"github.com/CortexFoundation/torrentfs/params"
@@ -38,13 +37,6 @@ import (
 	"time"
 )
 
-var (
-	rpcBlockMeter   = metrics.NewRegisteredMeter("torrent/block/call", nil)
-	rpcCurrentMeter = metrics.NewRegisteredMeter("torrent/current/call", nil)
-	rpcUploadMeter  = metrics.NewRegisteredMeter("torrent/upload/call", nil)
-	rpcReceiptMeter = metrics.NewRegisteredMeter("torrent/receipt/call", nil)
-)
-
 // Monitor observes the data changes on the blockchain and synchronizes.
 // cl for ipc/rpc communication, dl for download manager, and fs for data storage.
 type Monitor struct {
@@ -188,7 +180,7 @@ func (m *Monitor) Callback() chan any {
 	return m.callback
 }
 
-func (m *Monitor) loadHistory() error {
+/*func (m *Monitor) loadHistory() error {
 	torrents, _ := m.fs.InitTorrents()
 	if m.mode != params.LAZY {
 		for k, v := range torrents {
@@ -206,7 +198,7 @@ func (m *Monitor) loadHistory() error {
 	}
 
 	return nil
-}
+}*/
 
 func (m *Monitor) download(ctx context.Context, k string, v uint64) error {
 	if m.mode != params.LAZY && m.callback != nil {