diff --git a/server/jccommon/types.go b/server/jccommon/types.go
index 15662258..f1cee747 100644
--- a/server/jccommon/types.go
+++ b/server/jccommon/types.go
@@ -67,3 +67,12 @@ type MailEvent struct {
 func (MailEvent) TableName() string {
 	return "t_event"
 }
+
+type NftStacking struct {
+	NetId int32
+	ContractAddress string
+	TokenType int32
+	TokenId string
+	ItemId int32
+	Quality int32
+}
diff --git a/server/light_backtask/task/contribution.go b/server/light_backtask/task/contribution.go
index f50e5b0b..9467a169 100644
--- a/server/light_backtask/task/contribution.go
+++ b/server/light_backtask/task/contribution.go
@@ -14,18 +14,9 @@ type contribution struct {
 	lockMetas []*mt.Contract
 }
 
-type nftStacking struct {
-	netId int32
-	contractAddress string
-	tokenType int32
-	tokenId string
-	itemId int32
-	quality int32
-}
-
 type accountStacking struct {
 	accountAddress string
-	nfts []*nftStacking
+	nfts []*jccommon.NftStacking
 }
 
 func (this* contribution) init() {
@@ -117,19 +108,19 @@ func (this* contribution) loadFromDb(addressHash *q5.ConcurrentMap[string, *acco
 	if accountAddress == "" {
 		return true
 	}
-	p := new(nftStacking)
-	p.netId = q5.ToInt32(ds.GetByName("net_id"))
-	p.contractAddress = ds.GetByName("contract_address")
-	p.tokenType = q5.ToInt32(ds.GetByName("token_type"))
-	p.tokenId = ds.GetByName("token_id")
-	p.itemId = q5.ToInt32(ds.GetByName("item_id"))
-	p.quality = q5.ToInt32(ds.GetByName("quality"))
+	p := new(jccommon.NftStacking)
+	p.NetId = q5.ToInt32(ds.GetByName("net_id"))
+	p.ContractAddress = ds.GetByName("contract_address")
+	p.TokenType = q5.ToInt32(ds.GetByName("token_type"))
+	p.TokenId = ds.GetByName("token_id")
+	p.ItemId = q5.ToInt32(ds.GetByName("item_id"))
+	p.Quality = q5.ToInt32(ds.GetByName("quality"))
 	if a, ok := addressHash.Load(accountAddress); ok {
 		q5.AppendSlice(&(*a).nfts, p)
 	} else {
 		a := new(accountStacking)
 		a.accountAddress = accountAddress
-		a.nfts = []*nftStacking{}
+		a.nfts = []*jccommon.NftStacking{}
 		q5.AppendSlice(&a.nfts, p)
 	}
 	return true