diff --git a/server/web3bcspider/services/blockchain.js b/server/web3bcspider/services/blockchain.js
index 831b800..2a2bc62 100644
--- a/server/web3bcspider/services/blockchain.js
+++ b/server/web3bcspider/services/blockchain.js
@@ -61,4 +61,4 @@ class BlockChain extends BaseService {
 
 }
 
-module.exports = new BlockChain();
+module.exports = BlockChain;
diff --git a/server/web3bcspider/services/pull_bcevent.js b/server/web3bcspider/services/pull_bcevent.js
index f0289bb..2265677 100644
--- a/server/web3bcspider/services/pull_bcevent.js
+++ b/server/web3bcspider/services/pull_bcevent.js
@@ -214,7 +214,7 @@ class PullBcEvent extends BaseService {
   }
 
   getInstanceName() {
-    const instName = this.getNetId() + '.' + this.getContractByName() + '.' + this.getEventName();
+    const instName = this.getNetId() + '.' + this.getContractName() + '.' + this.getEventName();
     return instName;
   }