diff --git a/src/App.js b/src/App.js
index 2459212..cf7e2e1 100644
--- a/src/App.js
+++ b/src/App.js
@@ -9,6 +9,7 @@ import { error } from 'util';
 import addressGenerator from './addressGenerator'
 import JSzip from 'jszip';
 import FileSaver from 'file-saver';
+import { constants } from './constants';
 
 function generateElement(msg){
   let errorNode = document.createElement("div");
@@ -46,7 +47,8 @@ class App extends Component {
     this.keysManager = null;
     getWeb3().then((web3Config) => {
       this.setState({web3Config})
-      this.keysManager = new KeysManager({
+      this.keysManager = new KeysManager()
+      this.keysManager.init({
         web3: web3Config.web3Instance,
         netId: web3Config.netId
       });
@@ -75,7 +77,6 @@ class App extends Component {
     const mining = await addressGenerator();
     const voting = await addressGenerator();
     const payout = await addressGenerator();
-    const netIdName = this.state.web3Config.netIdName;
     this.setState({
       mining,
       voting,
@@ -114,7 +115,6 @@ class App extends Component {
         icon: 'error',
         title: 'Error',
         content: generateElement(invalidKeyMsg)
-
       })
       return;
     }
@@ -130,15 +130,20 @@ class App extends Component {
         console.log(receipt);
         this.setState({loading: false})
         swal("Congratulations!", "Your keys are generated!", "success");
-        await this.generateZip({mining, voting, payout});
+        await this.generateZip({mining, voting, payout, netIdName: this.state.web3Config.netIdName});
       }).catch((error) => {
         console.error(error.message);
         this.setState({loading: false, keysGenerated: false})
         var content = document.createElement("div");
+        let msg;
+        if (error.message.includes(constants.userDeniedTransactionPattern))
+          msg = `Error: User ${constants.userDeniedTransactionPattern}`
+        else
+          msg = error.message
         content.innerHTML = `<div>
           Something went wrong!<br/><br/>
           Please contact Master Of Ceremony<br/><br/>
-          ${error.message}
+          ${msg}
         </div>`;
         swal({
           icon: 'error',
diff --git a/src/DownloadBtn.js b/src/DownloadBtn.js
deleted file mode 100644
index e69de29..0000000
diff --git a/src/addresses.js b/src/addresses.js
index feb10b0..8f228a1 100644
--- a/src/addresses.js
+++ b/src/addresses.js
@@ -1,29 +1,19 @@
 import { messages } from "./messages";
 import swal from 'sweetalert';
+import helpers from "./helpers";
 // const local = {
-//     VOTING_TO_CHANGE_KEYS_ADDRESS: '0xecdbe3937cf6ff27f70480855cfe03254f915b48',
-//     VOTING_TO_CHANGE_MIN_THRESHOLD_ADDRESS: '0x5ae30d4c8892292e0d8164f87a2e12dff9dc99e1',
-//     VOTING_TO_CHANGE_PROXY_ADDRESS: '0x6c221df3695ac13a7f9366568ec069c353d273b8',
-//     BALLOTS_STORAGE_ADDRESS: '0x5d6573e62e3688e40c1fc36e01b155fb0006f432',
-//     METADATA_ADDRESS: '0x93eba9d9de66133fcde35775e9da593edd59a4e3',
-//     POA_ADDRESS: '0xf472e0e43570b9afaab67089615080cf7c20018d',
-// }
+//    "KEYS_MANAGER_ADDRESS": "0x3ef32bb244016ad9af8c8f45398511e7e551b581"   
+//}
 
 let SOKOL_ADDRESSES = {};
 let CORE_ADDRESSES = {};
 
-function addressesURL(network) {
-    const organization = 'poanetwork';
-    const repoName = 'poa-chain-spec';
-    const sourceFile = 'contracts.json';
-    return `https://raw.githubusercontent.com/${organization}/${repoName}/${network}/${sourceFile}`;
-}
-
-function getContractsAddresses(network) {
-    fetch(addressesURL(network)).then(function(response) { 
+function getContractsAddresses(branch) {
+    let addr = helpers.addressesURL(branch);
+    fetch(helpers.addressesURL(branch)).then(function(response) { 
         return response.json();
     }).then(function(contracts) {
-        switch (network) {
+        switch (branch) {
             case 'core':
                 CORE_ADDRESSES = contracts;
                 break;
@@ -35,16 +25,7 @@ function getContractsAddresses(network) {
                 break;
         }
     }).catch(function(err) {
-        var content = document.createElement("div");
-        content.innerHTML = `<div>
-          Something went wrong!<br/><br/>
-          ${messages.wrongRepo(addressesURL(network))}
-        </div>`;
-        swal({
-          icon: 'error',
-          title: 'Error',
-          content: content
-        });
+        helpers.wrongRepoAlert(addr);
     });
 }
 
diff --git a/src/keysManager.js b/src/keysManager.js
index 5ee467c..8cbf37f 100644
--- a/src/keysManager.js
+++ b/src/keysManager.js
@@ -1,16 +1,22 @@
-import KeysManagerAbi from './keysManagerAbi.json';
 import Web3 from 'web3';
 import addressGenerator from './addressGenerator';
 import networkAddresses from './addresses';
+import helpers from "./helpers";
 
 export default class KeysManager {
-  constructor({web3, netId}){
-    let web3_10 = new Web3(web3.currentProvider);
+  async init({web3, netId}){
+    this.web3_10 = new Web3(web3.currentProvider);
     const {KEYS_MANAGER_ADDRESS} = networkAddresses(netId);
     console.log('Keys Manager ', KEYS_MANAGER_ADDRESS);
-    this.web3_10 = web3_10;
-    this.keysInstance = new web3_10.eth.Contract(KeysManagerAbi, KEYS_MANAGER_ADDRESS);
+    const branch = helpers.getBranch(netId);
+
+    let that = this;
+
+    let KeysManagerAbi = await helpers.getABI(branch, 'KeysManager')
+
+    that.keysInstance = new this.web3_10.eth.Contract(KeysManagerAbi, KEYS_MANAGER_ADDRESS);
   }
+
   async isInitialKeyValid(initialKey) {
     return await this.keysInstance.methods.initialKeys(initialKey).call();
   }
diff --git a/src/keysManagerAbi.json b/src/keysManagerAbi.json
deleted file mode 100644
index 18cb54f..0000000
--- a/src/keysManagerAbi.json
+++ /dev/null
@@ -1,760 +0,0 @@
-[
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "name": "successfulValidatorClone",
-    "outputs": [
-      {
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "removePayoutKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "removeVotingKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "getVotingByMining",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_votingKey",
-        "type": "address"
-      }
-    ],
-    "name": "getMiningKeyByVoting",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      }
-    ],
-    "name": "addMiningKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "poaNetworkConsensus",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "name": "miningKeyHistory",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "getVotingToChangeKeys",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "getTime",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "name": "validatorKeys",
-    "outputs": [
-      {
-        "name": "votingKey",
-        "type": "address"
-      },
-      {
-        "name": "payoutKey",
-        "type": "address"
-      },
-      {
-        "name": "isMiningActive",
-        "type": "bool"
-      },
-      {
-        "name": "isVotingActive",
-        "type": "bool"
-      },
-      {
-        "name": "isPayoutActive",
-        "type": "bool"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "previousKeysManager",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_votingKey",
-        "type": "address"
-      }
-    ],
-    "name": "isVotingActive",
-    "outputs": [
-      {
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      },
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "addPayoutKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "name": "initialKeys",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint8"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      },
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "swapPayoutKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "getPayoutByMining",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      }
-    ],
-    "name": "removeMiningKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "maxLimitValidators",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "migrateMiningKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_initialKey",
-        "type": "address"
-      }
-    ],
-    "name": "initiateKeys",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      },
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "addVotingKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_initialKey",
-        "type": "address"
-      }
-    ],
-    "name": "migrateInitialKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      }
-    ],
-    "name": "isMiningActive",
-    "outputs": [
-      {
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "contractVersion",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint8"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "getMiningKeyHistory",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "proxyStorage",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_initialKey",
-        "type": "address"
-      }
-    ],
-    "name": "getInitialKey",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint8"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      },
-      {
-        "name": "_votingKey",
-        "type": "address"
-      },
-      {
-        "name": "_payoutKey",
-        "type": "address"
-      }
-    ],
-    "name": "createKeys",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "initialKeysCount",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      },
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "swapVotingKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_key",
-        "type": "address"
-      },
-      {
-        "name": "_oldMiningKey",
-        "type": "address"
-      }
-    ],
-    "name": "swapMiningKey",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "maxNumberOfInitialKeys",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "name": "miningKeyByVoting",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "masterOfCeremony",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_miningKey",
-        "type": "address"
-      }
-    ],
-    "name": "isPayoutActive",
-    "outputs": [
-      {
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "name": "_proxyStorage",
-        "type": "address"
-      },
-      {
-        "name": "_poaConsensus",
-        "type": "address"
-      },
-      {
-        "name": "_masterOfCeremony",
-        "type": "address"
-      },
-      {
-        "name": "_previousKeysManager",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "constructor"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "key",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "name": "miningKey",
-        "type": "address"
-      },
-      {
-        "indexed": false,
-        "name": "action",
-        "type": "string"
-      }
-    ],
-    "name": "PayoutKeyChanged",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "key",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "name": "miningKey",
-        "type": "address"
-      },
-      {
-        "indexed": false,
-        "name": "action",
-        "type": "string"
-      }
-    ],
-    "name": "VotingKeyChanged",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "key",
-        "type": "address"
-      },
-      {
-        "indexed": false,
-        "name": "action",
-        "type": "string"
-      }
-    ],
-    "name": "MiningKeyChanged",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "name": "miningKey",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "name": "votingKey",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "name": "payoutKey",
-        "type": "address"
-      }
-    ],
-    "name": "ValidatorInitialized",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "name": "initialKey",
-        "type": "address"
-      },
-      {
-        "indexed": false,
-        "name": "time",
-        "type": "uint256"
-      },
-      {
-        "indexed": false,
-        "name": "initialKeysCount",
-        "type": "uint256"
-      }
-    ],
-    "name": "InitialKeyCreated",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "name",
-        "type": "string"
-      },
-      {
-        "indexed": false,
-        "name": "key",
-        "type": "address"
-      }
-    ],
-    "name": "Migrated",
-    "type": "event"
-  }
-]
\ No newline at end of file