diff --git a/server/web3dbspider/services/events/UserMinterFactory/activate721nft.js b/server/web3dbspider/services/events/UserMinterFactory/activate721nft.js
index d5d9159..ecbdab9 100644
--- a/server/web3dbspider/services/events/UserMinterFactory/activate721nft.js
+++ b/server/web3dbspider/services/events/UserMinterFactory/activate721nft.js
@@ -4,8 +4,7 @@ const bcutils = require('j7/bcutils');
 const utils = require('j7/utils');
 const j7event = require('j7/event');
 const metaFactory = require('../../metadata/factory');
-const C = require('../../C');
-const gameapi = require('../gameapi');
+const BaseEventProcess = require('../common/BaseEventProcess');
 
 /*
 操作成功的事件
@@ -17,16 +16,10 @@ event TokenMinted(
 )
 */
 
-class Activate721Nft {
-
-  constructor(proc, conn, eventDb) {
-    this.eventProc = proc;
-    this.conn = conn;
-    this.eventDb = eventDb;
-  }
+class Activate721Nft extends BaseEventProcess {
 
   async start(event) {
-    const returnValues = event['returnValues'];
+    const returnValues = this.getReturnValues();
     const transId = returnValues['nonce'];
     const to = returnValues['to'];
 
@@ -38,7 +31,7 @@ class Activate721Nft {
 
     const params = bcutils.extractParamsFromTransId(transId);
     if (!params || params.length != 3) {
-      //this.throwError(instance, 'activate721nft error transId:' + transId);
+      this.throwError(' error transId:' + transId);
       return;
     }
     const itemUniId = params[0];
@@ -46,7 +39,6 @@ class Activate721Nft {
 
     console.log(params);
     await this.mintNft(
-      conn,
       transId,
       bcutils.toNormalAddress(to),
       tokenId,
@@ -55,19 +47,19 @@ class Activate721Nft {
     await gameapi.confirmTransactionDb(transId);
   }
 
-  async mintNft(conn, transId, owner,  tokenId, itemUniId, itemId) {
+  async mintNft(transId, owner,  tokenId, itemUniId, itemId) {
     const itemMeta = metaFactory.getMetaByKey('Item', itemId);
     if (!itemMeta) {
-      this.throwError(instance, 'activate721nft error transId:1');
+      this.throwError('activate721nft error transId:1');
       return;
     }
     const tokenType = itemMeta.getNftType();
     if (tokenType == bcutils.NONE_TYPE) {
-      this.throwError(instance, 'activate721nft error transId:2');
+      this.throwError('activate721nft error transId:2');
       return;
     }
     await this.updateGameDbInfo(instance, conn, transId, itemUniId, itemId, tokenId, tokenType);
-    const {err, row} = await conn.ormSelectOne(
+    const {err, row} = await this.conn.ormSelectOne(
       't_nft',
       [
         ['token_id', tokenId],
@@ -90,7 +82,7 @@ class Activate721Nft {
         ['createtime', nowTime],
         ['modifytime', nowTime],
       ];
-      const {err} = await conn.insert(
+      const {err} = await this.conn.insert(
         't_nft',
         fieldList
       );
@@ -140,7 +132,7 @@ class Activate721Nft {
           this.throwError(instance, 'error token_type:' + tokenType);
           return;
         }
-        await conn.update(
+        await this.conn.update(
           tblName,
           [
             ['idx',  itemUniId],
@@ -153,7 +145,7 @@ class Activate721Nft {
           ]
         );
       } finally {
-        conn.release();
+        this.conn.release();
       }
     } catch (e) {
         this.throwError(instance, 'updateGameDbInfo err:' + e);
@@ -161,23 +153,6 @@ class Activate721Nft {
     }
   }
 
-  genLogHead() {
-
-  }
-
-  getBlockNumber() {
-    return this.eventDb['block_number'];
-  }
-
-  getReturnValues() {
-
-  }
-
-  throwError(instance, err) {
-    const errMsg = 'processActivate721NftEvent:' + utils.jsonEncode(instance) + ' err:' + err;
-    throw errMsg;
-  }
-
 }
 
 module.exports = Activate721Nft;
diff --git a/server/web3dbspider/services/events/common/BaseEventProcess.js b/server/web3dbspider/services/events/common/BaseEventProcess.js
new file mode 100644
index 0000000..237f8ce
--- /dev/null
+++ b/server/web3dbspider/services/events/common/BaseEventProcess.js
@@ -0,0 +1,40 @@
+const log = require('j7/log');
+const app = require('j7/app');
+const bcutils = require('j7/bcutils');
+const utils = require('j7/utils');
+const j7event = require('j7/event');
+const metaFactory = require('../../metadata/factory');
+
+class BaseEventProcess {
+
+  constructor(proc, conn, eventDb) {
+    this.eventProc = proc;
+    this.conn = conn;
+    this.eventDb = eventDb;
+    this.returnValues = utils.jsonDecode(this.getEventDb());
+  }
+
+  genLogHead(msg) {
+    return this.eventProc.genLogHead(' activate721nft ' + msg);
+  }
+
+  getEventDb() {
+    return this.eventDb;
+  }
+
+  getBlockNumber() {
+    return this.eventDb['block_number'];
+  }
+
+  getReturnValues() {
+    return this.returnValues;
+  }
+
+  throwError(err) {
+    const errMsg = this.genLogHead(err);
+    throw errMsg;
+  }
+
+}
+
+module.exports = BaseEventProcess;