diff --git a/bcutils.js b/bcutils.js
index 924ad26..ed548f2 100644
--- a/bcutils.js
+++ b/bcutils.js
@@ -8,6 +8,10 @@ const BC_FUNC_BLIND_BOX = 5;
 const BC_FUNC_PRESENT = 6;
 const BC_MAX_TOKEN_IDX = 99999;
 
+const BC_TRANSID_MAX_PARAMS_NUM = 3;
+const BC_TRANSID_MAX_SEQID = 9999999;
+const BC_TRANS_FUNC_ACTIVATE = 11;
+
 const BC_EPOCH = 1643212800;
 
 const NONE_TYPE = 0;
@@ -62,6 +66,35 @@ function isSameAddress(a, b) {
   return a.toLowerCase() == b.toLowerCase();
 }
 
+/*
+  max(uint64): 18446744073709551615 = len(20)
+  max(uint256): 115792089237316195423570985008687907853269984665640564039457584007913129639935 = len(78)
+  max(int32): 2147483648 = len(10)
+  len(tokenid) = 16
+  transHead: funcId(2)|time(9)|seqId(7) = len(18)
+ */
+
+function genTransId(funcId, time, seqId, params) {
+  let transId =
+      utils.pad(funcId, 2) +
+      utils.pad(toBcTime(time), 9) +
+      utils.pad(seqId % BC_TRANSID_MAX_SEQID, 7);
+  params.forEach
+  (
+    (element) => {
+      transId += utils.pad(element, 20);
+    }
+  );
+  for (let i = 0; i < BC_TRANSID_MAX_PARAMS_NUM - params.length; ++i) {
+      transId += utils.pad(0, 20);
+  }
+  return transId;
+}
+
+function isValidTransId(transId) {
+  return utils.isPureNumberStr(transId.toString()) && transId.toString().length == 78;
+}
+
 exports.BC_BASE_GAME_ID = BC_BASE_GAME_ID;
 exports.BC_FUNC_CREATION = BC_FUNC_CREATION;
 exports.BC_FUNC_GUILD = BC_FUNC_GUILD;
@@ -69,11 +102,13 @@ exports.BC_FUNC_BLIND_BOX = BC_FUNC_BLIND_BOX;
 exports.BC_FUNC_PRESENT = BC_FUNC_PRESENT;
 exports.BC_EPOCH = BC_EPOCH;
 exports.BC_MAX_TOKEN_IDX = BC_MAX_TOKEN_IDX;
+exports.BC_TRANSID_MAX_PARAMS_NUM = BC_TRANSID_MAX_PARAMS_NUM;
+exports.BC_TRANS_FUNC_ACTIVATE = BC_TRANS_FUNC_ACTIVATE;
 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.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;
@@ -83,3 +118,5 @@ exports.toNormalAddress = toNormalAddress;
 exports.genTokenId = genTokenId;
 exports.isValidTokenId = isValidTokenId;
 exports.isSameAddress = isSameAddress;
+exports.genTransId = genTransId;
+exports.isValidTransId = isValidTransId;
diff --git a/db.js b/db.js
index fe10e5d..0d85eb3 100644
--- a/db.js
+++ b/db.js
@@ -117,6 +117,38 @@ class DB {
     return await this.execScript(sql, params);
   }
 
+  async insertEx(tblName, fieldList) {
+    const params = [];
+    let sql = 'INSERT INTO `' + tblName + '` (';
+
+    fieldList.forEach((item, index) => {
+      const suffix = (index + 1 < fieldList.length ? ',': '');
+      sql += '`' + item[0] + '`' + suffix;
+    });
+
+    sql += ') VALUES (';
+    fieldList.forEach((item, index) => {
+      const suffix = (index + 1 < fieldList.length ? ',': '');
+      sql += '?' + suffix;
+      params.push(item[1]);
+    });
+    sql += ')';
+
+    const ret = await this.execScript(sql, params);
+    ret['last_idx'] = 0;
+    const {err, row} = await this.execQueryOne(
+      'SELECT LAST_INSERT_ID() AS lastId',
+      [
+      ]
+    );
+    if (err) {
+      ret['err'] = err;
+    } else {
+      ret['lastId'] = row['lastId'];
+    }
+    return ret;
+  }
+
   async upsert(tblName, whereList, updateList, insertList, opts = null) {
     const params = [];
     let sql = 'SELECT * FROM `' + tblName + '` ';