diff --git a/server/web3service/blockchain.js b/server/web3service/blockchain.js
index 895781d..b2413a1 100644
--- a/server/web3service/blockchain.js
+++ b/server/web3service/blockchain.js
@@ -6,7 +6,6 @@ const event = require('j7/event');
 const sync = require("j7/sync");
 const log = require("j7/log");
 const metaFactory = require('./metadata/factory');
-const C = require("./C");
 
 class BlockChain {
 
@@ -42,7 +41,6 @@ class BlockChain {
                               this.netId
                              ));
     }
-    event.emitEvent(C.BC_INITIALIZED_EVENT);
   }
 
   getNetId() {
@@ -102,4 +100,4 @@ class BlockChain {
 
 }
 
-module.exports = new BlockChain();
+module.exports = BlockChain;
diff --git a/server/web3service/services/blockchain.js b/server/web3service/services/blockchain.js
new file mode 100644
index 0000000..6601847
--- /dev/null
+++ b/server/web3service/services/blockchain.js
@@ -0,0 +1,29 @@
+const utils = require('j7/utils');
+const BaseService = require('./baseservice');
+const metaFactory = require('../metadata/factory');
+
+const netIdHash = {};
+
+function getBc(netId) {
+  return utils.hasKey(netIdHash, netId) ? netIdHash[netId] : null;
+}
+
+class BlockChain extends BaseService {
+
+  #bc = null;
+
+  async init(netId) {
+    this.#bc = getBc(netId);
+  }
+
+  getNftAddress(tokenType) {
+
+  }
+
+  async soliditySha3Sign() {
+
+  }
+
+}
+
+module.exports = BlockChain;