diff --git a/server/web3tools/app.js b/server/web3tools/app.js
index eca6e7d..35ce60a 100644
--- a/server/web3tools/app.js
+++ b/server/web3tools/app.js
@@ -5,63 +5,8 @@ const bcutils = require('j7/bcutils');
 const event = require('j7/event');
 const config = require('j7/config');
 const bchelper = require('common/bchelper');
+const common = require('./common');
 
-function jsonToCsvOld(fileName, data, fields) {
-  let out = '';
-  fields.forEach(
-    (field) => {
-      out += field + ',';
-    }
-  );
-  out += '\n';
-  data.forEach(
-    (row) => {
-      fields.forEach(
-        (field) => {
-          out += row[field] + ',';
-        }
-      );
-      out += '\n';
-    }
-  );
-  fs.writeFileSync(fileName, out);
-}
-
-function jsonToCsv(fileName, data, fields) {
-  let out = '';
-  const csvFields = [
-    ['chain', '', 13473],
-    ['to', 'address', ''],
-    ['type', '', 2],
-    ['address', '', '0x65570A86E5aA2B14325f8a13C70b74f7d1E2f5c9'],
-    ['from', '', ''],
-    ['amount', '', ''],
-    ['tokenid', 'token_id', '']
-  ];
-  csvFields.forEach(
-    (field) => {
-      out += field[0] + ',';
-    }
-  );
-  out += '\n';
-  data.forEach(
-    (row) => {
-      csvFields.forEach(
-        (field) => {
-          if (row[field[1]]) {
-            out += row[field[1]] + ',';
-          } else {
-            out += field[2] + ',';
-          }
-        }
-      );
-      out += '\n';
-    }
-  );
-  fs.writeFileSync(fileName, out);
-}
-
-const heroList = [30100, 30300, 30400, 30500, 30600, 30800, 30900];
 const airDropDate = utils.getArgv('f');
 const json = utils.readJsonFromFile
 (`../bin_dev/web3tools/config/airdrops/${airDropDate}.airdrop@${airDropDate}.airdrop.json`);
@@ -77,7 +22,7 @@ json.forEach(
         throw new Error('error address');
       }
       outItem['type'] = 'hero';
-      outItem['item_id'] = heroList[utils.randRange(0, 7)];
+      outItem['item_id'] = common.heroList[utils.randRange(0, common.heroList.length)];
       outItem['level'] = 1;
       outItem['quality'] = 2;
       outItem['token_id'] = bchelper.genAirDropTokenId(airDropDate, utils.pad(seqId, 7));
@@ -89,7 +34,7 @@ json.forEach(
 fs.writeFileSync(
   `../bin_dev/web3tools/config/airdrops/${airDropDate}.airdrop.json`,
   utils.prettyJsonEncode(outJson));
-jsonToCsv(
+common.jsonToCsv(
   `../bin_dev/web3tools/config/airdrops/${airDropDate}.airdrop.csv`,
   outJson,
   [
diff --git a/server/web3tools/common.js b/server/web3tools/common.js
new file mode 100644
index 0000000..3bdccd3
--- /dev/null
+++ b/server/web3tools/common.js
@@ -0,0 +1,44 @@
+const fs = require('fs');
+const app = require('j7/app');
+const utils = require('j7/utils');
+const bcutils = require('j7/bcutils');
+const event = require('j7/event');
+const config = require('j7/config');
+const bchelper = require('common/bchelper');
+
+function jsonToCsv(fileName, data, fields) {
+  let out = '';
+  const csvFields = [
+    ['chain', '', 13473],
+    ['to', 'address', ''],
+    ['type', '', 2],
+    ['address', '', '0x65570A86E5aA2B14325f8a13C70b74f7d1E2f5c9'],
+    ['from', '', ''],
+    ['amount', '', ''],
+    ['tokenid', 'token_id', '']
+  ];
+  csvFields.forEach(
+    (field) => {
+      out += field[0] + ',';
+    }
+  );
+  out += '\n';
+  data.forEach(
+    (row) => {
+      csvFields.forEach(
+        (field) => {
+          if (row[field[1]]) {
+            out += row[field[1]] + ',';
+          } else {
+            out += field[2] + ',';
+          }
+        }
+      );
+      out += '\n';
+    }
+  );
+  fs.writeFileSync(fileName, out);
+}
+
+exports.jsonToCsv = jsonToCsv;
+exports.heroList = [30100, 30300, 30400, 30500, 30600, 30800, 30900];
diff --git a/server/web3tools/second_mint.js b/server/web3tools/second_mint.js
new file mode 100644
index 0000000..241ef58
--- /dev/null
+++ b/server/web3tools/second_mint.js
@@ -0,0 +1,41 @@
+const fs = require('fs');
+const app = require('j7/app');
+const utils = require('j7/utils');
+const bcutils = require('j7/bcutils');
+const event = require('j7/event');
+const config = require('j7/config');
+const bchelper = require('common/bchelper');
+
+function jsonToCsv(fileName, data, fields) {
+  let out = '';
+  const csvFields = [
+    ['chain', '', 13473],
+    ['to', 'address', ''],
+    ['type', '', 2],
+    ['address', '', '0x65570A86E5aA2B14325f8a13C70b74f7d1E2f5c9'],
+    ['from', '', ''],
+    ['amount', '', ''],
+    ['tokenid', 'token_id', '']
+  ];
+  csvFields.forEach(
+    (field) => {
+      out += field[0] + ',';
+    }
+  );
+  out += '\n';
+  data.forEach(
+    (row) => {
+      csvFields.forEach(
+        (field) => {
+          if (row[field[1]]) {
+            out += row[field[1]] + ',';
+          } else {
+            out += field[2] + ',';
+          }
+        }
+      );
+      out += '\n';
+    }
+  );
+  fs.writeFileSync(fileName, out);
+}