diff --git a/types/coin.go b/types/coin.go
index cd4a92f..8e6bea0 100644
--- a/types/coin.go
+++ b/types/coin.go
@@ -2,9 +2,10 @@ package types
 
 import (
 	"errors"
-	"github.com/coming-chat/go-sui/v2/sui_types"
 	"math/big"
 	"sort"
+
+	"github.com/coming-chat/go-sui/v2/sui_types"
 )
 
 const SUI_COIN_TYPE = "0x2::sui::SUI"
@@ -36,7 +37,7 @@ func (c *Coin) Reference() *sui_types.ObjectRef {
 	}
 }
 
-type CoinPage = Page[Coin, sui_types.ObjectID]
+type CoinPage = Page[Coin, string]
 
 func (c *Coin) IsSUI() bool {
 	return c.CoinType == SUI_COIN_TYPE
diff --git a/types/coin_test.go b/types/coin_test.go
index eb715a0..3fe65e2 100644
--- a/types/coin_test.go
+++ b/types/coin_test.go
@@ -10,7 +10,6 @@ import (
 )
 
 type suiAddress = sui_types.SuiAddress
-type suiObjectID = sui_types.ObjectID
 
 func balanceObject(val uint64) SafeSuiBigInt[uint64] {
 	return NewSafeSuiBigInt(val)
@@ -263,7 +262,7 @@ func TestPickupCoins(t *testing.T) {
 		{
 			name: "moreCount = 3",
 			args: args{
-				inputCoins: &Page[Coin, suiObjectID]{
+				inputCoins: &Page[Coin, string]{
 					Data: []Coin{
 						coin(1e3), coin(1e5), coin(1e2), coin(1e4),
 					},
@@ -282,7 +281,7 @@ func TestPickupCoins(t *testing.T) {
 		{
 			name: "large gas",
 			args: args{
-				inputCoins: &Page[Coin, suiObjectID]{
+				inputCoins: &Page[Coin, string]{
 					Data: []Coin{
 						coin(1e3), coin(1e5), coin(1e2), coin(1e4),
 					},
@@ -302,7 +301,7 @@ func TestPickupCoins(t *testing.T) {
 		{
 			name: "ErrNoCoinsFound",
 			args: args{
-				inputCoins: &Page[Coin, suiObjectID]{
+				inputCoins: &Page[Coin, string]{
 					Data: []Coin{},
 				},
 				targetAmount: *big.NewInt(101000),
@@ -312,7 +311,7 @@ func TestPickupCoins(t *testing.T) {
 		{
 			name: "ErrInsufficientBalance",
 			args: args{
-				inputCoins: &Page[Coin, suiObjectID]{
+				inputCoins: &Page[Coin, string]{
 					Data: []Coin{
 						coin(1e5), coin(1e6), coin(1e4),
 					},
@@ -324,7 +323,7 @@ func TestPickupCoins(t *testing.T) {
 		{
 			name: "ErrNeedMergeCoin 1",
 			args: args{
-				inputCoins: &Page[Coin, suiObjectID]{
+				inputCoins: &Page[Coin, string]{
 					Data: []Coin{
 						coin(1e5), coin(1e6), coin(1e4),
 					},
@@ -337,7 +336,7 @@ func TestPickupCoins(t *testing.T) {
 		{
 			name: "ErrNeedMergeCoin 2",
 			args: args{
-				inputCoins: &Page[Coin, suiObjectID]{
+				inputCoins: &Page[Coin, string]{
 					Data: []Coin{
 						coin(1e5), coin(1e6), coin(1e4), coin(1e5),
 					},
diff --git a/types/common.go b/types/common.go
index 5831054..06efd91 100644
--- a/types/common.go
+++ b/types/common.go
@@ -2,9 +2,10 @@ package types
 
 import (
 	"fmt"
+	"math/big"
+
 	"github.com/coming-chat/go-sui/v2/sui_types"
 	"github.com/shopspring/decimal"
-	"math/big"
 )
 
 type SuiBigInt = decimal.Decimal
@@ -83,7 +84,7 @@ type ObjectOwner struct {
 }
 
 type Page[T SuiTransactionBlockResponse | SuiEvent | Coin | SuiObjectResponse | DynamicFieldInfo | string,
-	C sui_types.TransactionDigest | EventId | sui_types.ObjectID] struct {
+	C sui_types.TransactionDigest | EventId | sui_types.ObjectID | string] struct {
 	Data        []T  `json:"data"`
 	NextCursor  *C   `json:"nextCursor,omitempty"`
 	HasNextPage bool `json:"hasNextPage"`