diff --git a/contracts/utils.go b/contracts/utils.go
index 2f6f718bfd..39dfe7e917 100644
--- a/contracts/utils.go
+++ b/contracts/utils.go
@@ -253,7 +253,6 @@ func GenM2FromRandomize(randomizes []int64, lenSigners int64) ([]int64, error) {
 	blockValidator := NewSlice(int64(0), lenSigners, 1)
 	randIndexs := make([]int64, lenSigners)
 	total := int64(0)
-	var temp int64 = 0
 	for _, j := range randomizes {
 		total += j
 	}
@@ -264,7 +263,7 @@ func GenM2FromRandomize(randomizes []int64, lenSigners int64) ([]int64, error) {
 			blockLength = 1
 		}
 		randomIndex := int64(rand.Intn(blockLength))
-		temp = blockValidator[randomIndex]
+		temp := blockValidator[randomIndex]
 		blockValidator[randomIndex] = blockValidator[i]
 		blockValidator[i] = temp
 		blockValidator = append(blockValidator[:i], blockValidator[i+1:]...)
diff --git a/contracts/validator/validator_test.go b/contracts/validator/validator_test.go
index 8543efd081..43665cfb37 100644
--- a/contracts/validator/validator_test.go
+++ b/contracts/validator/validator_test.go
@@ -244,7 +244,6 @@ func GetRewardBalancesRate(foudationWalletAddr common.Address, masterAddr common
 }
 
 func GetCandidatesOwnerBySigner(validator *contractValidator.XDCValidator, signerAddr common.Address) common.Address {
-	owner := signerAddr
 	opts := new(bind.CallOpts)
 	owner, err := validator.GetCandidateOwner(opts, signerAddr)
 	if err != nil {
@@ -254,6 +253,7 @@ func GetCandidatesOwnerBySigner(validator *contractValidator.XDCValidator, signe
 
 	return owner
 }
+
 func toyVoteTx(t *testing.T, nonce uint64, amount *big.Int, to, addr common.Address) *types.Transaction {
 	vote := "6dd7d8ea" // VoteMethod = "0x6dd7d8ea"
 	action := fmt.Sprintf("%s%s%s", vote, "000000000000000000000000", addr.String()[3:])
diff --git a/core/blockchain.go b/core/blockchain.go
index 0d0f64b57b..a1fbc24280 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -3078,8 +3078,8 @@ func (bc *BlockChain) processTradingAndLendingStates(isValidBlockNumber bool, bl
 				return tradingState, lendingState, fmt.Errorf("failed to ProcessLiquidationData. Err: %v", err)
 			}
 			if tradingService.IsSDKNode() {
-				finalizedTx := lendingstate.FinalizedResult{}
-				if finalizedTx, err = ExtractLendingFinalizedTradeTransactions(block.Transactions()); err != nil {
+				finalizedTx, err := ExtractLendingFinalizedTradeTransactions(block.Transactions())
+				if err != nil {
 					return tradingState, lendingState, err
 				}
 				bc.AddFinalizedTrades(finalizedTx.TxHash, finalizedTrades)
diff --git a/core/vm/privacy/bulletproof.go b/core/vm/privacy/bulletproof.go
index 2de8f4e1e3..addeab7326 100644
--- a/core/vm/privacy/bulletproof.go
+++ b/core/vm/privacy/bulletproof.go
@@ -919,7 +919,6 @@ func (mrp *MultiRangeProof) Deserialize(proof []byte) error {
 	offset += 32
 
 	mrp.Cx = new(big.Int).SetBytes(proof[offset : offset+32])
-	offset += 32
 
 	return nil
 }