diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..7f2fb97
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,8 @@
+- (Mandatory) Description
+   a human-readable description of changes
+   a human-readable description of the purpose of the PR
+- (Mandatory) What is it: (Fix), (Feature), or (Refactor) in Title, e.g., "(Fix) price of 1 token in Wei > 18 decimals"
+- (Mandatory) Developers: Each completed PR should be updated in the Wiki Documentation.
+(Recommended) Each PR should have one commit message and therefore should only contain one specific fix or feature. Otherwise, multiple PRs should be made
+- Did you check that your PR is chain agnostic? It shouldn't depend on any hardcoded chainIds, URLs.
+- (Optional) Any additional concerns or comments
\ No newline at end of file
diff --git a/src/contracts/KeysManager.contract.js b/src/contracts/KeysManager.contract.js
index 2c4d7c9..c8919d9 100644
--- a/src/contracts/KeysManager.contract.js
+++ b/src/contracts/KeysManager.contract.js
@@ -1,13 +1,14 @@
 import KeysManagerAbi from './keysManager.abi.json'
 import Web3 from 'web3';
-import {KEYS_MANAGER_ADDRESS} from './addresses';
+import networkAddresses from './addresses';
 
-console.log('Keys Manager', KEYS_MANAGER_ADDRESS);
 
 export default class KeysManager {
-  constructor({web3}){
+  constructor({web3, netId}){
     let web3_10 = new Web3(web3.currentProvider);
+    const {KEYS_MANAGER_ADDRESS} = networkAddresses(netId);
     this.keysInstance = new web3_10.eth.Contract(KeysManagerAbi, KEYS_MANAGER_ADDRESS);
+    console.log('Keys Manager', KEYS_MANAGER_ADDRESS);
   }
   async isVotingActive(votingKey) {
     return await this.keysInstance.methods.isVotingActive(votingKey).call();
diff --git a/src/contracts/Metadata.contract.js b/src/contracts/Metadata.contract.js
index 35184a0..045227c 100644
--- a/src/contracts/Metadata.contract.js
+++ b/src/contracts/Metadata.contract.js
@@ -2,7 +2,7 @@ import PoaConsensus from './PoaConsensus.contract'
 import MetadataAbi from './metadata.abi.json'
 import Web3 from 'web3';
 import moment from 'moment';
-import {METADATA_ADDRESS} from './addresses';
+import networkAddresses from './addresses';
 var toAscii = function(hex) {
   var str = '',
       i = 0,
@@ -17,14 +17,13 @@ var toAscii = function(hex) {
   }
   return str;
 };
-
-console.log('Metadata contract:', METADATA_ADDRESS)
-const SOKOL_MOC = '0xe8ddc5c7a2d2f0d7a9798459c0104fdf5e987aca';
-const CORE_MOC = '0xCf260eA317555637C55F70e55dbA8D5ad8414Cb0';
 export default class Metadata {
-  constructor({web3}){
+  constructor({web3, netId}){
     this.web3_10 = new Web3(web3.currentProvider);
+    const {METADATA_ADDRESS, MOC} = networkAddresses(netId);
     this.metadataInstance = new this.web3_10.eth.Contract(MetadataAbi, METADATA_ADDRESS);
+    this.MOC_ADDRESS = MOC;
+    console.log('Metadata contract:', METADATA_ADDRESS)
   }
   async createMetadata({
     firstName,
@@ -96,7 +95,7 @@ export default class Metadata {
       const keys = await poaInstance.getValidators()
       for (let key of keys) {
         let data = await this.getValidatorData({miningKey: key})
-        if(key === SOKOL_MOC || key === CORE_MOC) {
+        if(key === this.MOC_ADDRESS) {
           data = this.getMocData()
         }
         data.address = key
diff --git a/src/contracts/PoaConsensus.contract.js b/src/contracts/PoaConsensus.contract.js
index 06f04fb..96613e5 100644
--- a/src/contracts/PoaConsensus.contract.js
+++ b/src/contracts/PoaConsensus.contract.js
@@ -1,12 +1,13 @@
 import poaConsensusAbi from './poaConsensus.abi.json'
 import Web3 from 'web3';
-import {POA_ADDRESS} from './addresses';
+import networkAddresses from './addresses';
 
-console.log('POA Address ' , POA_ADDRESS)
 export default class POAConsensus {
-  constructor({web3}){
+  constructor({web3, netId}){
     let web3_10 = new Web3(web3.currentProvider);
+    const {POA_ADDRESS} = networkAddresses(netId);
     this.poaInstance = new web3_10.eth.Contract(poaConsensusAbi, POA_ADDRESS);
+    console.log('POA Address ' , POA_ADDRESS)
   }
   async getValidators(){
     return await this.poaInstance.methods.getValidators().call();
diff --git a/src/contracts/addresses.js b/src/contracts/addresses.js
index 203a199..dfa25ae 100644
--- a/src/contracts/addresses.js
+++ b/src/contracts/addresses.js
@@ -1,5 +1,24 @@
-module.exports = {
+const CORE_ADDRESSES = {
   METADATA_ADDRESS: '0xcBB2912666c7e8023B7ec78B6842702eB26336aC',
   KEYS_MANAGER_ADDRESS: '0xfc90125492e58dbfe80c0bfb6a2a759c4f703ca8',
-  POA_ADDRESS: '0x8bf38d4764929064f2d4d3a56520a76ab3df415b'
+  POA_ADDRESS: '0x8bf38d4764929064f2d4d3a56520a76ab3df415b',
+  MOC: '0xCf260eA317555637C55F70e55dbA8D5ad8414Cb0'
+}
+
+const SOKOL_ADDRESSES = {
+  METADATA_ADDRESS: '0xce9ff1123223d13672cce06dd073d3749764daa6',
+  KEYS_MANAGER_ADDRESS: '0x88a34124bfffa27ef3e052c8dd2908e212643771',
+  POA_ADDRESS: '0x8bf38d4764929064f2d4d3a56520a76ab3df415b',
+  MOC: '0xe8ddc5c7a2d2f0d7a9798459c0104fdf5e987aca'
+}
+
+module.exports = (netId) => {
+  switch (netId){
+    case '77':
+      return SOKOL_ADDRESSES
+      case '99':
+      return CORE_ADDRESSES
+    default:
+      return CORE_ADDRESSES
+  }
 }
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index a126cfe..fd53d0e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -51,10 +51,12 @@ class AppMainRouter extends Component {
     }
     getWeb3().then(async (web3Config) => {
       const keysManager = new KeysManager({
-        web3: web3Config.web3Instance
+        web3: web3Config.web3Instance,
+        netId: web3Config.netId
       });
       const metadataContract = new Metadata({
-        web3: web3Config.web3Instance
+        web3: web3Config.web3Instance,
+        netId: web3Config.netId
       })
       this.setState({
         votingKey: web3Config.defaultAccount,