get balance from chain

.env.example

@@ -1 +1,2 @@
-ETHERSCAN_API_KEY=
+ETHERSCAN_API_KEY=
+INFURA_PROJECT_ID=

package.json

@@ -30,13 +30,14 @@
   "license": "MIT",
   "dependencies": {
     "@coingecko/cryptoformat": "^0.3.4",
+    "@oceanprotocol/keeper-contracts": "^0.13.2",
     "axios": "^0.19.2",
     "electron-is-dev": "^1.1.0",
     "electron-next": "^3.1.5",
     "electron-store": "^5.1.1",
     "ethereum-address": "^0.0.4",
     "ethereum-blockies": "github:MyEtherWallet/blockies",
-    "ethjs-unit": "^0.1.6",
+    "ethjs": "^0.4.0",
     "ms": "^2.1.2",
     "shortid": "^2.2.15"
   },

src/renderer/next.config.js

@@ -36,7 +36,8 @@ const withElectron = (nextConfig = {}) => {
 module.exports = withSvgr(
   withElectron({
     env: {
-      ETHERSCAN_API_KEY: process.env.ETHERSCAN_API_KEY
+      ETHERSCAN_API_KEY: process.env.ETHERSCAN_API_KEY,
+      INFURA_PROJECT_ID: process.env.INFURA_PROJECT_ID
     },
     exportPathMap() {
       return {

src/renderer/store/helpers.js

@@ -1,7 +1,8 @@
 import Store from 'electron-store'
-import unit from 'ethjs-unit'
+import Eth from 'ethjs'
 import { fetchData } from '../../utils'
 import { oceanTokenContract, conversions } from '../../config'
+import { abi } from '@oceanprotocol/keeper-contracts/artifacts/OceanToken.pacific.json'
 
 export async function fetchAndSetPrices(prices) {
   const currencies = conversions.join(',')
@@ -22,12 +23,14 @@ export async function fetchAndSetPrices(prices) {
 }
 
 export async function getBalance(account) {
-  const json = await fetchData(
-    `https://api.etherscan.io/api?module=account&action=tokenbalance&contractaddress=${oceanTokenContract}&address=${account}&tag=latest&apikey=${process.env.ETHERSCAN_API_KEY}`
+  const provider = new Eth.HttpProvider(
+    `https://mainnet.infura.io/v3/${process.env.INFURA_PROJECT_ID}`
   )
+  const eth = new Eth(provider)
+  const token = eth.contract(abi).at(oceanTokenContract)
+  const balance = await token.balanceOf(account)
 
-  const balance = unit.fromWei(`${json.result}`, 'ether')
-  return balance
+  return Eth.fromWei(balance[0], 'ether')
 }
 
 export async function getAccounts() {