public Money Exchange(Money money, Currency targetCurrency)
{
if (money == null)
{
throw new ArgumentNullException(nameof(money));
}
if (targetCurrency == null)
{
throw new ArgumentNullException(nameof(targetCurrency));
}
var exchangeRates = _exchangeRateProvider.GetExchangeRatesFor(money.Currency);
var exchangeRate = exchangeRates[targetCurrency];
return(new Money(money.Amount * exchangeRate, targetCurrency));
}
private decimal GetCurrentRate(Currency currency)
{
var dollarConversionRates = _provider.GetExchangeRatesFor(Currency.Dollar);
return(dollarConversionRates[currency]);
}
