diff --git a/core/state/statedb.go b/core/state/statedb.go
index 48adadf085d6..5c33e2d7e130 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -32,6 +32,8 @@ import (
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/trie"
 	"github.com/ethereum/go-ethereum/trie/trienode"
 	"github.com/ethereum/go-ethereum/trie/triestate"
 )
@@ -720,6 +722,43 @@ func (s *StateDB) CreateAccount(addr common.Address) {
 	}
 }
 
+func (s *StateDB) ForEachStorage(addr common.Address, cb func(key, value common.Hash) bool) error {
+	so := s.getStateObject(addr)
+	if so == nil {
+		return nil
+	}
+	tr, err := so.getTrie()
+	if err != nil {
+		return err
+	}
+	trieIt, err := tr.NodeIterator(nil)
+	if err != nil {
+		return err
+	}
+	it := trie.NewIterator(trieIt)
+
+	for it.Next() {
+		key := common.BytesToHash(s.trie.GetKey(it.Key))
+		if value, dirty := so.dirtyStorage[key]; dirty {
+			if !cb(key, value) {
+				return nil
+			}
+			continue
+		}
+
+		if len(it.Value) > 0 {
+			_, content, _, err := rlp.Split(it.Value)
+			if err != nil {
+				return err
+			}
+			if !cb(key, common.BytesToHash(content)) {
+				return nil
+			}
+		}
+	}
+	return nil
+}
+
 // Copy creates a deep, independent copy of the state.
 // Snapshots of the copied state cannot be applied to the copy.
 func (s *StateDB) Copy() *StateDB {
diff --git a/core/state/statedb_test.go b/core/state/statedb_test.go
index 869410ff431b..c08a0d959fa7 100644
--- a/core/state/statedb_test.go
+++ b/core/state/statedb_test.go
@@ -35,7 +35,6 @@ import (
 	"github.com/ethereum/go-ethereum/core/state/snapshot"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/trie"
 	"github.com/ethereum/go-ethereum/trie/triedb/hashdb"
 	"github.com/ethereum/go-ethereum/trie/triedb/pathdb"
@@ -448,43 +447,6 @@ func (test *snapshotTest) run() bool {
 	return true
 }
 
-func forEachStorage(s *StateDB, addr common.Address, cb func(key, value common.Hash) bool) error {
-	so := s.getStateObject(addr)
-	if so == nil {
-		return nil
-	}
-	tr, err := so.getTrie()
-	if err != nil {
-		return err
-	}
-	trieIt, err := tr.NodeIterator(nil)
-	if err != nil {
-		return err
-	}
-	it := trie.NewIterator(trieIt)
-
-	for it.Next() {
-		key := common.BytesToHash(s.trie.GetKey(it.Key))
-		if value, dirty := so.dirtyStorage[key]; dirty {
-			if !cb(key, value) {
-				return nil
-			}
-			continue
-		}
-
-		if len(it.Value) > 0 {
-			_, content, _, err := rlp.Split(it.Value)
-			if err != nil {
-				return err
-			}
-			if !cb(key, common.BytesToHash(content)) {
-				return nil
-			}
-		}
-	}
-	return nil
-}
-
 // checkEqual checks that methods of state and checkstate return the same values.
 func (test *snapshotTest) checkEqual(state, checkstate *StateDB) error {
 	for _, addr := range test.addrs {
@@ -506,10 +468,10 @@ func (test *snapshotTest) checkEqual(state, checkstate *StateDB) error {
 		checkeq("GetCodeSize", state.GetCodeSize(addr), checkstate.GetCodeSize(addr))
 		// Check storage.
 		if obj := state.getStateObject(addr); obj != nil {
-			forEachStorage(state, addr, func(key, value common.Hash) bool {
+			state.ForEachStorage(addr, func(key, value common.Hash) bool {
 				return checkeq("GetState("+key.Hex()+")", checkstate.GetState(addr, key), value)
 			})
-			forEachStorage(checkstate, addr, func(key, value common.Hash) bool {
+			checkstate.ForEachStorage(addr, func(key, value common.Hash) bool {
 				return checkeq("GetState("+key.Hex()+")", checkstate.GetState(addr, key), value)
 			})
 		}