diff --git a/node/flags/flags.go b/node/flags/flags.go
index aa359e8f..5ab047b0 100644
--- a/node/flags/flags.go
+++ b/node/flags/flags.go
@@ -170,6 +170,12 @@ var (
 		EnvVar: prefixEnvVar("VALIDATOR"),
 	}
 
+	ChallengeEnable = cli.BoolFlag{
+		Name:   "validator.challengeEnable",
+		Usage:  "Enable the validator mode",
+		EnvVar: prefixEnvVar("VALIDATOR_CHALLENGE_ENABLE"),
+	}
+
 	// validator
 	ValidatorPrivateKey = cli.StringFlag{
 		Name:   "validator.privateKey",
@@ -321,6 +327,7 @@ var Flags = []cli.Flag{
 	TendermintConfigPath,
 	MockEnabled,
 	ValidatorEnable,
+	ChallengeEnable,
 
 	// validator
 	ValidatorPrivateKey,
diff --git a/node/validator/config.go b/node/validator/config.go
index 29f95cfa..986fd16d 100644
--- a/node/validator/config.go
+++ b/node/validator/config.go
@@ -27,7 +27,7 @@ func NewConfig() *Config {
 func (c *Config) SetCliContext(ctx *cli.Context) error {
 	l1NodeAddr := ctx.GlobalString(flags.L1NodeAddr.Name)
 	l1ChainID := ctx.GlobalUint64(flags.L1ChainID.Name)
-	c.challengeEnable = ctx.GlobalIsSet(flags.ValidatorEnable.Name)
+	c.challengeEnable = ctx.GlobalBool(flags.ChallengeEnable.Name)
 	if c.challengeEnable {
 		hexPrvKey := ctx.GlobalString(flags.ValidatorPrivateKey.Name)
 		hex := strings.TrimPrefix(hexPrvKey, "0x")
diff --git a/node/validator/validator.go b/node/validator/validator.go
index 627123c4..224c8c3d 100644
--- a/node/validator/validator.go
+++ b/node/validator/validator.go
@@ -38,11 +38,12 @@ func NewValidator(cfg *Config, rollup *bindings.Rollup, logger tmlog.Logger) (*V
 		return nil, fmt.Errorf("dial l1 node error:%v", err)
 	}
 	return &Validator{
-		cli:        cli,
-		contract:   rollup,
-		privateKey: cfg.PrivateKey,
-		l1ChainID:  cfg.L1ChainID,
-		logger:     logger,
+		cli:             cli,
+		contract:        rollup,
+		privateKey:      cfg.PrivateKey,
+		l1ChainID:       cfg.L1ChainID,
+		challengeEnable: cfg.challengeEnable,
+		logger:          logger,
 	}, nil
 }
 
@@ -68,13 +69,6 @@ func (v *Validator) ChallengeState(batchIndex uint64) error {
 	}
 	opts.GasPrice = gasPrice
 	opts.NoSend = true
-	//publicKey := v.privateKey.Public()
-	// publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
-	// if !ok {
-	// 	log.Error("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
-	// }
-
-	//receiver := crypto.PubkeyToAddress(*publicKeyECDSA)
 	batchHash, err := v.contract.CommittedBatches(
 		&bind.CallOpts{
 			Pending: false,