mitum-lenops-93ad9b3837c704053f14c8a069888d7d39d4bbc0.patch

diff --git isaac/block/localfs_writer.go isaac/block/localfs_writer.go
index 9bdfa2b9..eda6c126 100644
--- isaac/block/localfs_writer.go
+++ isaac/block/localfs_writer.go
@@ -15,7 +15,6 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-	"sync/atomic"
 
 	"github.com/pkg/errors"
 	"github.com/spikeekips/mitum/base"
@@ -56,7 +55,6 @@ type LocalFSWriter struct {
 	m          BlockMap
 	networkID  base.NetworkID
 	hint.BaseHinter
-	lenops uint64
 	height base.Height
 	saved  bool
 	sync.Mutex
@@ -133,8 +131,6 @@ func (w *LocalFSWriter) SetOperation(_ context.Context, _ uint64, op base.Operat
 		return errors.Wrap(err, "set operation")
 	}
 
-	atomic.AddUint64(&w.lenops, 1)
-
 	return nil
 }
 
@@ -149,7 +145,7 @@ func (w *LocalFSWriter) SetOperationsTree(ctx context.Context, tw *fixedtree.Wri
 			if err := w.m.SetItem(NewLocalBlockMapItem(
 				base.BlockMapItemTypeOperations,
 				w.opsf.Checksum(),
-				atomic.LoadUint64(&w.lenops),
+				uint64(tw.Len()),
 			)); err != nil {
 				return errors.Wrap(err, "set operations")
 			}
@@ -377,7 +373,6 @@ func (w *LocalFSWriter) close() error {
 	w.heightbase = ""
 	w.temp = ""
 	w.m = BlockMap{}
-	w.lenops = 0
 
 	return nil
 }