diff --git a/contracts/utils.go b/contracts/utils.go
index b41e5691b46b..32bd7b612b89 100644
--- a/contracts/utils.go
+++ b/contracts/utils.go
@@ -103,8 +103,7 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *txpool.TxPool,
 		blockNumber := block.Number().Uint64()
 		checkNumber := blockNumber % chainConfig.XDPoS.Epoch
 		// Generate random private key and save into chaindb.
-		randomizeKeyName := []byte("randomizeKey")
-		exist, _ := chainDb.Has(randomizeKeyName)
+		exist := rawdb.HasRandomize(chainDb)
 
 		// Set secret for randomize.
 		if !exist && checkNumber > 0 && common.EpocBlockSecret <= checkNumber && common.EpocBlockOpening > checkNumber {
@@ -129,12 +128,12 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *txpool.TxPool,
 			}
 
 			// Put randomize key into chainDb.
-			chainDb.Put(randomizeKeyName, randomizeKeyValue)
+			rawdb.WriteRandomize(chainDb, randomizeKeyValue)
 		}
 
 		// Set opening for randomize.
 		if exist && checkNumber > 0 && common.EpocBlockOpening <= checkNumber && common.EpocBlockRandomize >= checkNumber {
-			randomizeKeyValue, err := chainDb.Get(randomizeKeyName)
+			randomizeKeyValue, err := rawdb.ReadRandomize(chainDb)
 			if err != nil {
 				log.Error("Fail to get randomize key from state db.", "error", err)
 				return err
@@ -158,7 +157,7 @@ func CreateTransactionSign(chainConfig *params.ChainConfig, pool *txpool.TxPool,
 			}
 
 			// Clear randomize key in state db.
-			chainDb.Delete(randomizeKeyName)
+			rawdb.DeleteRandomize(chainDb)
 		}
 	}
 
diff --git a/core/rawdb/accessors_xdc.go b/core/rawdb/accessors_xdc.go
new file mode 100644
index 000000000000..633a10f3de00
--- /dev/null
+++ b/core/rawdb/accessors_xdc.go
@@ -0,0 +1,53 @@
+// Copyright 2025 The XDPoSChain Authors
+// This file is part of the XDPoSChain library.
+//
+// The XDPoSChain 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 XDPoSChain 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 XDPoSChain library. If not, see <http://www.gnu.org/licenses/>.
+
+package rawdb
+
+import (
+	"github.com/XinFinOrg/XDPoSChain/ethdb"
+	"github.com/XinFinOrg/XDPoSChain/log"
+)
+
+// HasRandomize verifies the existence of randomize.
+func HasRandomize(db ethdb.KeyValueReader) bool {
+	if has, err := db.Has(randomizeKey); !has || err != nil {
+		return false
+	}
+	return true
+}
+
+// ReadRandomize retrieves the randomiz from database.
+func ReadRandomize(db ethdb.KeyValueReader) ([]byte, error) {
+	data, err := db.Get(randomizeKey)
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}
+
+// WriteRandomize writes the randomize into database.
+func WriteRandomize(db ethdb.KeyValueWriter, data []byte) {
+	if err := db.Put(randomizeKey, data); err != nil {
+		log.Crit("Failed to store randomizeKey", "err", err)
+	}
+}
+
+// DeleteRandomize deletes the randomize from database.
+func DeleteRandomize(db ethdb.KeyValueWriter) {
+	if err := db.Delete(randomizeKey); err != nil {
+		log.Crit("Failed to delete randomizeKey", "err", err)
+	}
+}
diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index 874b52c15ccc..5c07430164c4 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -78,6 +78,8 @@ var (
 	// used by old db, now only used for conversion
 	oldTxMetaSuffix = []byte{0x01}
 
+	randomizeKey = []byte("randomizeKey")
+
 	preimageCounter    = metrics.NewRegisteredCounter("db/preimage/total", nil)
 	preimageHitCounter = metrics.NewRegisteredCounter("db/preimage/hits", nil)
 )