fix to resolve comments

Signed-off-by: cryyl <1226241521@qq.com>

core/blockchain.go

@@ -521,6 +521,15 @@ func (bc *BlockChain) cacheDiffLayer(diffLayer *types.DiffLayer, diffLayerCh cha
 	sort.SliceStable(diffLayer.Storages, func(i, j int) bool {
 		return diffLayer.Storages[i].Account.Hex() < diffLayer.Storages[j].Account.Hex()
 	})
+	for _, storage := range diffLayer.Storages {
+		// Sort keys and vals by key.
+		sort.SliceStable(storage.Keys, func(i, j int) bool {
+			return storage.Keys[i] < storage.Keys[j]
+		})
+		sort.SliceStable(storage.Vals, func(i, j int) bool {
+			return storage.Keys[i] < storage.Keys[j]
+		})
+	}
 
 	if bc.diffLayerCache.Len() >= diffLayerCacheLimit {
 		bc.diffLayerCache.RemoveOldest()

core/state/statedb.go

@@ -1603,12 +1603,8 @@ func (s *StateDB) SnapToDiffLayer() ([]common.Address, []types.DiffAccount, []ty
 	for accountHash, storage := range s.snapStorage {
 		keys := make([]string, 0, len(storage))
 		values := make([][]byte, 0, len(storage))
-		for k := range storage {
+		for k, v := range storage {
 			keys = append(keys, k)
-		}
-		sort.Strings(keys)
-		for _, k := range keys {
-			v := storage[k]
 			values = append(values, v)
 		}
 		storages = append(storages, types.DiffStorage{