fix NaN value after setting to zero

localize state

app/components/simple-voting/PollsList.js

@@ -11,7 +11,6 @@ import Slide from '@material-ui/core/Slide';
 import Typography from '@material-ui/core/Typography';
 import Slider from '@material-ui/lab/Slider';
 import PollManager from 'Embark/contracts/PollManager';
-import MiniMeTokenInterface from 'Embark/contracts/MiniMeTokenInterface';
 import IconButton from '@material-ui/core/IconButton';
 import CloseIcon from '@material-ui/icons/Close';
 import web3 from "Embark/web3"
@@ -104,21 +103,9 @@ class Poll extends PureComponent {
   }
 
   componentDidMount() {
-    this.getBalance();
     this.getVote();
   }
 
-  getBalance() {
-    const { fromWei } = web3.utils;
-    const { appendToPoll, idPoll } = this.props;
-    MiniMeTokenInterface.options.address = this.props._token;
-    MiniMeTokenInterface.methods.balanceOfAt(web3.eth.defaultAccount, this.props._startBlock - 1)
-                        .call()
-                        .then(balance => {
-                          appendToPoll(idPoll, {balance: fromWei(balance)})
-                        });
-  }
-
   getVote() {
     const { fromWei } = web3.utils;
     const { idPoll } = this.props;

app/utils/polls.js

@@ -1,16 +1,28 @@
+import web3 from "Embark/web3"
+import MiniMeTokenInterface from 'Embark/contracts/MiniMeTokenInterface';
+
 const excluded = {
   PROPER_LIGHT_CLIENT_SUPPORT : 3,
   IMPLEMENT_SECURITY_PRACTICES : 14,
   SHIP_1_0 : 16
 };
 
-export const getPolls = (number, pollMethod) => {
+export const getBalance = async (idPoll, token, startBlock) => {
+  const { fromWei } = web3.utils;
+  const { balanceOfAt } = MiniMeTokenInterface.methods;
+  MiniMeTokenInterface.options.address = token;
+  const balance = await balanceOfAt(web3.eth.defaultAccount, startBlock - 1).call();
+  return fromWei(balance);
+}
+
+export const getPolls = async (number, pollMethod) => {
   const polls = [];
   for (let i = number-1; i >= 0; i--) {
-    const poll = pollMethod(i).call();
-    polls.push(poll);
+    const poll = await pollMethod(i).call();
+    const balance = await getBalance(i, poll._token, poll._startBlock);
+    polls.push({ ...poll, balance });
   }
-  return Promise.all(polls.reverse());
+  return polls.reverse();
 }
 
 const excludedPolls = new Set(Object.values(excluded));