diff --git a/server/common/contract.js b/server/common/contract.js
new file mode 100644
index 0000000..8481b27
--- /dev/null
+++ b/server/common/contract.js
@@ -0,0 +1,29 @@
+const CEC_INSTANCE_NAME = 'CEC';
+const CEG_INSTANCE_NAME = 'CEG';
+const HERO_INSTANCE_NAME = 'HERO';
+const WEAPON_INSTANCE_NAME = 'WEAPON';
+const CHIP_INSTANCE_NAME = 'CHIP';
+const BEUSDT_INSTANCE_NAME = 'BEUSDT';
+const BADGE_INSTANCE_NAME = 'BADGE';
+const UserMinterFactory_INSTANCE_NAME = 'UserMinterFactory';
+const Gacha_INSTANCE_NAME = 'Gacha';
+const ClaimGachaFactory_INSTANCE_NAME = 'ClaimGachaFactory';
+const BENftMarket_INSTANCE_NAME = 'BENftMarket';
+const BENftMall_INSTANCE_NAME = 'BENftMall';
+const GameItemMarket_INSTANCE_NAME = 'GameItemMarket';
+const GameItemMall_INSTANCE_NAME = 'GameItemMall';
+
+exports.CEC_INSTANCE_NAME = CEC_INSTANCE_NAME;
+exports.CEG_INSTANCE_NAME = CEG_INSTANCE_NAME;
+exports.HERO_INSTANCE_NAME = HERO_INSTANCE_NAME;
+exports.WEAPON_INSTANCE_NAME = WEAPON_INSTANCE_NAME;
+exports.CHIP_INSTANCE_NAME = CHIP_INSTANCE_NAME;
+exports.BEUSDT_INSTANCE_NAME = BEUSDT_INSTANCE_NAME;
+exports.BADGE_INSTANCE_NAME = BADGE_INSTANCE_NAME;
+exports.UserMinterFactory_INSTANCE_NAME = UserMinterFactory_INSTANCE_NAME;
+exports.Gacha_INSTANCE_NAME = Gacha_INSTANCE_NAME;
+exports.ClaimGachaFactory_INSTANCE_NAME = ClaimGachaFactory_INSTANCE_NAME;
+exports.BENftMarket_INSTANCE_NAME = BENftMarket_INSTANCE_NAME;
+exports.BENftMall_INSTANCE_NAME = BENftMall_INSTANCE_NAME;
+exports.GameItemMarket_INSTANCE_NAME = GameItemMarket_INSTANCE_NAME;
+exports.GameItemMall_INSTANCE_NAME = GameItemMall_INSTANCE_NAME;