matheus-rossi

const convertCurrencyAlt = async (from, to, amount) => {
  const countries = await getCountriesAlt(to)
  const rate = await getExchangeRateAlt(from, to)
  const exchangedAmount = amount * rate
  return `${amount} ${from} is worth ${exchangedAmount} ${to}. ${to} can be used in the following countries: ${countries.join(', ')}`
}

matheus-rossi

const convertCurrency = (from, to, amount) => {
  let countries
  return getCountries(to).then((tempCountries) => {
    countries = tempCountries
    return getExchangeRate(from, to)
  }).then((rate) => {
    const exchangedAmount = amount * rate
    return `${amount} ${from} is worth ${exchangedAmount} ${to}. ${to} can be used in the following countries: ${countries.join(', ')}`
  })
}

matheus-rossi

const getCountries = (currencyCode) => {
  return axios.get(`https://restcountries.eu/rest/v2/currency/${currencyCode}`).then((res)=> {
    return res.data.map((country)=> country.name)
  })
}

matheus-rossi

const getExchangeRate = (from, to) => {
  return axios.get(`http://api.fixer.io/latest?base=${from}`).then((res)=> {
    return res.data.rates[to] 
  })
}