Get Country Codes & Flags of Countires w.r.t Country Codes

app.js

// Get country codes & flag of countries with respect to country codes
const fetch = require("node-fetch");
const NEW_LINES = `\n\n`;
const EMOJIS = `${NEW_LINES}😀 😃 😄 😁 😆 😅 😂 🤣 ☺️ 😊 😇 🙂 🙃 😉 😌 😍 😘 😗 😙 😚 😋 😜 😝 😛 🤑 🤗 🤓 😎 🤡 🤠 😏 😒 😞 😔 😟 😕 🙁 ☹️ 😣 😖 😫 😩 😤 😠 😡 😶 😐 😑 😯 😦 😧 😮 😲 😵 😳 😱 😨 😰 😢 😥 🤤 😭 😓 😪 😴 🙄 🤔 🤥 😬 🤐 🤢 🤧 😷 🤒 🤕 😈 👿 👹 👺 💩 👻 💀 ☠️ 👽 👾 🤖 🎃 😺 😸 😹 😻 😼${NEW_LINES}`;
const FIXER_URI = "https://api.fixer.io/latest";
const REST_COUNTRIES_URI = "https://restcountries.eu/rest/v2/alpha/";
const COUNTRY_URI = "http://country.io/currency.json";
let currencyCodes = [];
let currencyOfCountry = [];
const flagsWithCurrencies = {};

const LOG = text => {
  console.log(EMOJIS);
  console.log(text);
  console.log(EMOJIS);
};

// ["INR"];
const getCurrencyCodes = async () => {
  const res = await fetch(FIXER_URI);
  const json = await res.json();
  currencyCodes = Object.keys(json.rates);
};

// ["IN"];
const getCountryFromCurrency = async () => {
  const res = await fetch(COUNTRY_URI);
  const json = await res.json();
  const result = Object.keys(json)
    .map(countryCode => {
      const currencyCode = json[countryCode];
      const index = currencyCodes.indexOf(currencyCode);
      return {
        countryCode,
        currencyCode: currencyCodes[index]
      };
    })
    .filter(item => item.currencyCode !== undefined);
  currencyOfCountry = result;
};

// {"INR": "https://india_flag.png"}
const getFlagsWithCurrencies = async () => {
  for (let i = 0; i < currencyOfCountry.length; i += 1) {
    const { countryCode, currencyCode } = currencyOfCountry[i];
    try {
      const res = await fetch(REST_COUNTRIES_URI + countryCode);
      const json = await res.json();
      flagsWithCurrencies[currencyCode] = json.flag;
    } catch (e) {}
  }
  console.log(flagsWithCurrencies);
};

const callAll = async () => {
  LOG("FETCHING CURRENCY CODES");
  await getCurrencyCodes();
  console.log(JSON.stringify(currencyCodes, null, 2));

  LOG("FETCHING COUNTRY CODES FROM CURRENCY CODES");
  await getCountryFromCurrency();
  console.log(currencyOfCountry);

  LOG("FETCHING COUNTRY CODES FROM CURRENCY CODES");
  await getFlagsWithCurrencies();
  console.log(flagsWithCurrencies);
};

callAll();

country_codes.json

[
        'AUD',
        'BGN',
        'BRL',
        'CAD',
        'CHF',
        'CNY',
        'CZK',
        'DKK',
        'GBP',
        'HKD',
        'HRK',
        'HUF',
        'IDR',
        'ILS',
        'INR',
        'JPY',
        'KRW',
        'MXN',
        'MYR',
        'NOK',
        'NZD',
        'PHP',
        'PLN',
        'RON',
        'RUB',
        'SEK',
        'SGD',
        'THB',
        'TRY',
        'ZAR',
        'EUR',
]

currency_with_country.json

[
  { countryCode: "BG", currencyCode: "BGN" },
  { countryCode: "BV", currencyCode: "NOK" },
  { countryCode: "BQ", currencyCode: "USD" },
  { countryCode: "BR", currencyCode: "BRL" },
  { countryCode: "JE", currencyCode: "GBP" },
  { countryCode: "RU", currencyCode: "RUB" },
  { countryCode: "TL", currencyCode: "USD" },
  { countryCode: "RO", currencyCode: "RON" },
  { countryCode: "TK", currencyCode: "NZD" },
  { countryCode: "GU", currencyCode: "USD" },
  { countryCode: "GS", currencyCode: "GBP" },
  { countryCode: "JP", currencyCode: "JPY" },
  { countryCode: "GG", currencyCode: "GBP" },
  { countryCode: "GB", currencyCode: "GBP" },
  { countryCode: "SV", currencyCode: "USD" },
  { countryCode: "GL", currencyCode: "DKK" },
  { countryCode: "HR", currencyCode: "HRK" },
  { countryCode: "HU", currencyCode: "HUF" },
  { countryCode: "HK", currencyCode: "HKD" },
  { countryCode: "HM", currencyCode: "AUD" },
  { countryCode: "PR", currencyCode: "USD" },
  { countryCode: "PS", currencyCode: "ILS" },
  { countryCode: "PW", currencyCode: "USD" },
  { countryCode: "SJ", currencyCode: "NOK" },
  { countryCode: "PH", currencyCode: "PHP" },
  { countryCode: "PN", currencyCode: "NZD" },
  { countryCode: "PL", currencyCode: "PLN" },
  { countryCode: "ZA", currencyCode: "ZAR" },
  { countryCode: "EC", currencyCode: "USD" },
  { countryCode: "MH", currencyCode: "USD" },
  { countryCode: "MP", currencyCode: "USD" },
  { countryCode: "IM", currencyCode: "GBP" },
  { countryCode: "MY", currencyCode: "MYR" },
  { countryCode: "MX", currencyCode: "MXN" },
  { countryCode: "IL", currencyCode: "ILS" },
  { countryCode: "IO", currencyCode: "USD" },
  { countryCode: "FM", currencyCode: "USD" },
  { countryCode: "FO", currencyCode: "DKK" },
  { countryCode: "NO", currencyCode: "NOK" },
  { countryCode: "NF", currencyCode: "AUD" },
  { countryCode: "NZ", currencyCode: "NZD" },
  { countryCode: "NR", currencyCode: "AUD" },
  { countryCode: "NU", currencyCode: "NZD" },
  { countryCode: "CK", currencyCode: "NZD" },
  { countryCode: "CH", currencyCode: "CHF" },
  { countryCode: "CN", currencyCode: "CNY" },
  { countryCode: "CC", currencyCode: "AUD" },
  { countryCode: "CA", currencyCode: "CAD" },
  { countryCode: "CZ", currencyCode: "CZK" },
  { countryCode: "CX", currencyCode: "AUD" },
  { countryCode: "KI", currencyCode: "AUD" },
  { countryCode: "KR", currencyCode: "KRW" },
  { countryCode: "SG", currencyCode: "SGD" },
  { countryCode: "SE", currencyCode: "SEK" },
  { countryCode: "DK", currencyCode: "DKK" },
  { countryCode: "VG", currencyCode: "USD" },
  { countryCode: "US", currencyCode: "USD" },
  { countryCode: "UM", currencyCode: "USD" },
  { countryCode: "TV", currencyCode: "AUD" },
  { countryCode: "TR", currencyCode: "TRY" },
  { countryCode: "LI", currencyCode: "CHF" },
  { countryCode: "TH", currencyCode: "THB" },
  { countryCode: "TC", currencyCode: "USD" },
  { countryCode: "VI", currencyCode: "USD" },
  { countryCode: "AS", currencyCode: "USD" },
  { countryCode: "AU", currencyCode: "AUD" },
  { countryCode: "IN", currencyCode: "INR" },
  { countryCode: "ID", currencyCode: "IDR" }
]

currency_with_flag.json

{
  BGN: "https://restcountries.eu/data/bgr.svg",
  NOK: "https://restcountries.eu/data/nor.svg",
  USD: "https://restcountries.eu/data/asm.svg",
  BRL: "https://restcountries.eu/data/bra.svg",
  GBP: "https://restcountries.eu/data/imn.svg",
  RUB: "https://restcountries.eu/data/rus.svg",
  RON: "https://restcountries.eu/data/rou.svg",
  NZD: "https://restcountries.eu/data/cok.svg",
  JPY: "https://restcountries.eu/data/jpn.svg",
  DKK: "https://restcountries.eu/data/dnk.svg",
  HRK: "https://restcountries.eu/data/hrv.svg",
  HUF: "https://restcountries.eu/data/hun.svg",
  HKD: "https://restcountries.eu/data/hkg.svg",
  AUD: "https://restcountries.eu/data/aus.svg",
  ILS: "https://restcountries.eu/data/isr.svg",
  PHP: "https://restcountries.eu/data/phl.svg",
  PLN: "https://restcountries.eu/data/pol.svg",
  ZAR: "https://restcountries.eu/data/zaf.svg",
  MYR: "https://restcountries.eu/data/mys.svg",
  MXN: "https://restcountries.eu/data/mex.svg",
  CHF: "https://restcountries.eu/data/lie.svg",
  CNY: "https://restcountries.eu/data/chn.svg",
  CAD: "https://restcountries.eu/data/can.svg",
  CZK: "https://restcountries.eu/data/cze.svg",
  KRW: "https://restcountries.eu/data/kor.svg",
  SGD: "https://restcountries.eu/data/sgp.svg",
  SEK: "https://restcountries.eu/data/swe.svg",
  TRY: "https://restcountries.eu/data/tur.svg",
  THB: "https://restcountries.eu/data/tha.svg",
  INR: "https://restcountries.eu/data/ind.svg",
  IDR: "https://restcountries.eu/data/idn.svg"
}