fetchEthListData.js

const fetch = require('node-fetch')
const fs = require('fs')
const tokenFolder = './src/tokens'
const contractFolder = './src/contracts'

async function fetchTokens () {
  try {
    if (!fs.existsSync(tokenFolder)) {
      fs.mkdirSync(tokenFolder);
    }

    const tokenList = await fetch('https://api.github.com/repos/MyEtherWallet/ethereum-lists/contents/dist/tokens').then(res => res.json()).catch(err => console.log(err));
    const tokenFileURL = 'https://raw.githubusercontent.com/MyEtherWallet/ethereum-lists/master/dist/tokens/';
    if (tokenList !== undefined && tokenList.length > 0) {
      tokenList.forEach(async (tokenFile) => {
        let tokensCollection = await fetch(`${tokenFileURL + tokenFile.name}/tokens-${tokenFile.name}.json`).then(res => res.json()).catch(err => console.log(err));
        if (tokensCollection !== undefined) {
          fs.writeFileSync(`${tokenFolder}/tokens-${tokenFile.name}.json`, JSON.stringify(tokensCollection));
        }
      })
    }
  } catch (e) {
    console.error(e); // todo replace with proper error
  }
}

async function fetchContracts () {
  try {
    if (!fs.existsSync(contractFolder)) {
      fs.mkdirSync(contractFolder);
    }

    const contractList = await fetch('https://api.github.com/repos/MyEtherWallet/ethereum-lists/contents/dist/contracts').then(res => res.json()).catch(err => console.log(err));
    const contractFileURL = 'https://raw.githubusercontent.com/MyEtherWallet/ethereum-lists/master/dist/contracts/';
    if (contractList !== undefined && contractList.length > 0) {
      contractList.forEach(async (contractFile) => {
        let contractsCollection = await fetch(`${contractFileURL + contractFile.name}/contract-abi-${contractFile.name}.json`).then(res => res.json()).catch(err => console.log(err));
        if (contractsCollection !== undefined) {
          fs.writeFileSync(`${contractFolder}/contract-abi-${contractFile.name}.json`, JSON.stringify(contractsCollection));
        }
      })
    }
  } catch (e) {
    console.error(e); // todo replace with proper error
  }
}

function run () {
  fetchTokens()
  fetchContracts()
}

run()