diff --git a/common/model/user_operation.go b/common/model/user_operation.go
index 827b7b99..cf79132d 100644
--- a/common/model/user_operation.go
+++ b/common/model/user_operation.go
@@ -3,10 +3,17 @@ package model
 import (
 	"encoding/hex"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/go-playground/validator/v10"
 	"github.com/mitchellh/mapstructure"
 	"golang.org/x/xerrors"
 	"math/big"
 	"reflect"
+	"sync"
+)
+
+var (
+	validate = validator.New()
+	onlyOnce = sync.Once{}
 )
 
 // UserOperation  entrypoint v0.0.6
@@ -58,10 +65,36 @@ func NewUserOp(userOp *map[string]any) (*UserOperation, error) {
 	if err := decoder.Decode(userOp); err != nil {
 		return nil, xerrors.Errorf("data [%w] convert failed: [%w]", userOp, err)
 	}
+	onlyOnce.Do(func() {
+		validate.RegisterCustomTypeFunc(validateAddressType, common.Address{})
+		validate.RegisterCustomTypeFunc(validateBigIntType, big.Int{})
+	})
+	err = validate.Struct(result)
+	if err != nil {
+		return nil, err
+	}
 
 	return &result, nil
 }
 
+func validateAddressType(field reflect.Value) interface{} {
+	value, ok := field.Interface().(common.Address)
+	if !ok || value == common.HexToAddress("0x") {
+		return nil
+	}
+
+	return field
+}
+
+func validateBigIntType(field reflect.Value) interface{} {
+	value, ok := field.Interface().(big.Int)
+	if !ok || value.Cmp(big.NewInt(0)) == -1 {
+		return nil
+	}
+
+	return field
+}
+
 func exactFieldMatch(mapKey, fieldName string) bool {
 	return mapKey == fieldName
 }
diff --git a/common/utils/util_test.go b/common/utils/util_test.go
index 0beff9be..b65aa0e5 100644
--- a/common/utils/util_test.go
+++ b/common/utils/util_test.go
@@ -31,10 +31,11 @@ func TestSignUserOp(t *testing.T) {
 	}
 	signByte, err := SignUserOp("1d8a58126e87e53edc7b24d58d1328230641de8c4242c135492bf5560e0ff421", userOp)
 	assert.NoError(t, err)
+	len := len(signByte)
+	fmt.Printf("signByte len: %d\n", len)
 	fmt.Printf("signByte: %x\n", signByte)
 	singature := hex.EncodeToString(signByte)
 	fmt.Printf("singature: %s\n", singature)
-
 }
 func TestNewUserOp(t *testing.T) {
 	userOp, newErr := model.NewUserOp(GenerateMockUserOperation())
diff --git a/docs/docs.go b/docs/docs.go
index a5400acb..5128b19b 100644
--- a/docs/docs.go
+++ b/docs/docs.go
@@ -191,12 +191,14 @@ const docTemplate = `{
             "enum": [
                 "ethereum",
                 "sepolia",
-                "arbitrum"
+                "arbitrum",
+                "arb-sepolia"
             ],
             "x-enum-varnames": [
                 "Ethereum",
                 "Sepolia",
-                "Arbitrum"
+                "Arbitrum",
+                "ArbTest"
             ]
         }
     },
diff --git a/docs/swagger.json b/docs/swagger.json
index 87f9ac7c..a4c6fd73 100644
--- a/docs/swagger.json
+++ b/docs/swagger.json
@@ -180,12 +180,14 @@
             "enum": [
                 "ethereum",
                 "sepolia",
-                "arbitrum"
+                "arbitrum",
+                "arb-sepolia"
             ],
             "x-enum-varnames": [
                 "Ethereum",
                 "Sepolia",
-                "Arbitrum"
+                "Arbitrum",
+                "ArbTest"
             ]
         }
     },
diff --git a/docs/swagger.yaml b/docs/swagger.yaml
index ed1f05be..830a0db3 100644
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -24,11 +24,13 @@ definitions:
     - ethereum
     - sepolia
     - arbitrum
+    - arb-sepolia
     type: string
     x-enum-varnames:
     - Ethereum
     - Sepolia
     - Arbitrum
+    - ArbTest
 info:
   contact:
     name: AAStar Support