feature: use bignumber.js

app/containers/send.js

@@ -1,6 +1,7 @@
 // @flow
 import { connect } from 'react-redux';
 import eres from 'eres';
+import { BigNumber } from 'bignumber.js';
 
 import rpc from '../../services/api';
 import { SendView } from '../views/send';
@@ -49,12 +50,12 @@ const mapDispatchToProps = (dispatch: Dispatch) => ({
         [
           filterObjectNullKeys({
             address: to,
-            amount: Number.parseFloat(amount),
+            amount: new BigNumber(amount).toNumber(),
             memo,
           }),
         ],
         1,
-        Number.parseFloat(String(fee)),
+        new BigNumber(fee).toNumber(),
       ),
     );
 

app/containers/transactions.js

@@ -4,6 +4,7 @@ import eres from 'eres';
 import flow from 'lodash.flow';
 import groupBy from 'lodash.groupby';
 import dateFns from 'date-fns';
+import { BigNumber } from 'bignumber.js';
 
 import { TransactionsView } from '../views/transactions';
 import {
@@ -46,7 +47,7 @@ const mapDispatchToProps = (dispatch: Dispatch) => ({
         type: transaction.category,
         date: new Date(transaction.time * 1000).toISOString(),
         address: transaction.address,
-        amount: Math.abs(transaction.amount),
+        amount: new BigNumber(transaction.amount).absoluteValue().toNumber(),
       })),
       arr => groupBy(arr, obj => dateFns.format(obj.date, 'MMM DD, YYYY')),
       obj => Object.keys(obj).map(day => ({

app/views/send.js

@@ -1,6 +1,7 @@
 // @flow
 import React, { PureComponent } from 'react';
 import styled from 'styled-components';
+import { BigNumber } from 'bignumber.js';
 
 import FEES from '../constants/fees';
 
@@ -158,15 +159,15 @@ export class SendView extends PureComponent<Props, State> {
 
     const zecBalance = formatNumber({ value: balance, append: 'ZEC ' });
     const zecBalanceInUsd = formatNumber({
-      value: balance * zecPrice,
+      value: new BigNumber(balance).multipliedBy(zecPrice).toNumber(),
       append: 'USD $',
     });
     const valueSent = formatNumber({
-      value: Number.parseFloat(amount),
+      value: new BigNumber(amount).toNumber(),
       append: 'ZEC ',
     });
     const valueSentInUsd = formatNumber({
-      value: Number.parseFloat(amount) * zecPrice,
+      value: new BigNumber(amount).multipliedBy(zecPrice).toNumber(),
       append: 'USD $',
     });