diff --git a/server/common/constant.js b/server/common/constant.js
index b832186..38d9e36 100644
--- a/server/common/constant.js
+++ b/server/common/constant.js
@@ -7,9 +7,25 @@ const BCNFTDB_NAME = 'BcNftDb0';
 
 const GAME_ID = 2006;
 
+const ITEM_HERO_TYPE = 3;
+const ITEM_GUN_TYPE = 7;
+const ITEM_MATERIAL_TYPE = 10;
+const ITEM_BLIND_BOX_TYPE = 12;
+const ITEM_CHIP_TYPE = 13;
+
+const ITEM_MATERIAL_CHIP_SUBTYPE = 3;
+
 exports.EVENTDB_STATE_PENDING = EVENTDB_STATE_PENDING;
 exports.EVENTDB_STATE_HANDLED = EVENTDB_STATE_HANDLED;
 exports.GAMEDB_NAME = GAMEDB_NAME;
 exports.BCEVENTDB_NAME = BCEVENTDB_NAME;
 exports.BCNFTDB_NAME = BCNFTDB_NAME;
 exports.GAME_ID = GAME_ID;
+
+exports.ITEM_HERO_TYPE = ITEM_HERO_TYPE;
+exports.ITEM_GUN_TYPE = ITEM_GUN_TYPE;
+exports.ITEM_MATERIAL_TYPE = ITEM_MATERIAL_TYPE;
+exports.ITEM_BLIND_BOX_TYPE = ITEM_BLIND_BOX_TYPE;
+exports.ITEM_CHIP_TYPE = ITEM_CHIP_TYPE;
+
+exports.ITEM_MATERIAL_CHIP_SUBTYPE = ITEM_MATERIAL_CHIP_SUBTYPE;
diff --git a/server/web3sign/metadata/Item.js b/server/web3sign/metadata/Item.js
index 5c64aba..f047bd6 100644
--- a/server/web3sign/metadata/Item.js
+++ b/server/web3sign/metadata/Item.js
@@ -4,14 +4,6 @@ const bcutils = require('j7/bcutils');
 const basewrap = require('./basewrap');
 const factory = require('./factory');
 
-const HERO_TYPE = 3;
-const GUN_TYPE = 7;
-const MATERIAL_TYPE = 10;
-const BLIND_BOX_TYPE = 12;
-const CHIP_TYPE = 13;
-
-const MATERIAL_CHIP_SUBTYPE = 3;
-
 class Item extends basewrap.BaseWrap {
 
   getNftType() {