public async Task <decimal?> CalculateExchange(decimal amount, string from, string to)
{
if (!Enum.IsDefined(typeof(Currencies), from.ToUpper()) || !Enum.IsDefined(typeof(Currencies), to.ToUpper()))
{
return(null);
}
var fromRate = await _ratesService.GetRateAsync(from);
var toRate = await _ratesService.GetRateAsync(to);
return(decimal.Round(amount * fromRate.Rate / toRate.Rate, 2, MidpointRounding.AwayFromZero));
}
public async Task <IActionResult> Get(string code)
{
var rate = await _ratesService.GetRateAsync(code);
if (rate == null)
{
return(NotFound());
}
return(Ok(rate));
}