diff --git a/server/web3service/controllers/claim_box.js b/server/web3service/controllers/claim_box.js
index 074a0e3..3f1326d 100644
--- a/server/web3service/controllers/claim_box.js
+++ b/server/web3service/controllers/claim_box.js
@@ -5,12 +5,14 @@ const app = require('j7/app');
 const utils = require('j7/utils');
 const bcutils = require('j7/bcutils');
 const metaFactory = require('../metadata/factory');
+const serviceFactory = require('../services/factory');
 
 async function claim(session) {
   try {
     const account = session.request('account');
     const netId = session.request('net_id');
-    const bc = null;
+    const bc = serviceFactory.create('BlockChain');
+    await bc.init(netId);
 
     const nftAddress = bc.getNftAddress(bcutils.CLAIM_BOX_TYPE);
 
diff --git a/server/web3service/services/factory.js b/server/web3service/services/factory.js
index 75fe851..d6ba35f 100644
--- a/server/web3service/services/factory.js
+++ b/server/web3service/services/factory.js
@@ -25,7 +25,7 @@ async function init() {
   await add("BlockChain", 'blockchain');
 }
 
-function create(name, session) {
+function create(name, session = null) {
   const service = services[name];
   return new service['class'](session);
 }