diff --git a/bcutils.js b/bcutils.js
index 98fceff..71e73f5 100644
--- a/bcutils.js
+++ b/bcutils.js
@@ -1,9 +1,20 @@
 const utils = require('./utils');
 
 const BC_BASE_GAME_ID = 2006;
+
 const BC_FUNC_CREATION = 1;
+const BC_FUNC_GUILD = 3;
+const BC_FUNC_BLIND_BOX = 5;
+const BC_MAX_TOKEN_IDX = 99999;
+
 const BC_EPOCH = 1643212800;
 
+const NONE_TYPE = 0;
+const HERO_TYPE = 1;
+const EQUIP_TYPE = 2;
+const CHIP_TYPE = 3;
+const BLIND_BOX_TYPE = 4;
+
 function isValidBcGameId(gameId) {
   return gameID > BASE_BC_GAME_ID && gameID < BC_BASE_GAME_ID + 99;
 }
@@ -24,13 +35,17 @@ function toBcGameId(gameId) {
   return gameId - BC_BASE_GAME_ID;
 }
 
+function toNormalAddress(address) {
+  return address.toLowerCase();
+}
+
 function genTokenId(gameId, funcId, time, subIdx, idx) {
   const tokenId =
         funcId.toString() +
         utils.pad(toBcGameId(gameId)) +
         utils.pad(toBcTime(time)) +
         utils.pad(subIdx, 1) +
-        utils.pad(1 + (idx % 99999), 5);
+        utils.pad(1 + (idx % BC_MAX_TOKEN_IDX), 5);
   return tokenId;
 }
 
@@ -54,12 +69,21 @@ function isSameAddress(a, b) {
 
 exports.BC_BASE_GAME_ID = BC_BASE_GAME_ID;
 exports.BC_FUNC_CREATION = BC_FUNC_CREATION;
+exports.BC_FUNC_GUILD = BC_FUNC_GUILD;
+exports.BC_FUNC_BLIND_BOX = BC_FUNC_BLIND_BOX;
 exports.BC_EPOCH = BC_EPOCH;
+exports.BC_MAX_TOKEN_IDX = BC_MAX_TOKEN_IDX;
+exports.NONE_TYPE = NONE_TYPE;
+exports.HERO_TYPE = HERO_TYPE
+exports.EQUIP_TYPE = EQUIP_TYPE
+exports.CHIP_TYPE = CHIP_TYPE
+exports.BLIND_BOX_TYPE = BLIND_BOX_TYPE
 exports.isValidBcGameId = isValidBcGameId;
 exports.isValidBcTime = isValidBcTime;
 exports.isValidBcFuncId = isValidBcFuncId;
 exports.toBcTime = toBcTime;
 exports.toBcGameId = toBcGameId;
+exports.toNormalAddress = toNormalAddress;
 exports.genTokenId = genTokenId;
 exports.isValidTokenId = isValidTokenId;
 exports.setTokenIdSubIdx = setTokenIdSubIdx;