public async Task <ExchangeResult> GetExchangeRateAsync(ExchangeRateRequest request)
{
var result = await _exchangeRetriever.Retrieve(request);
// TODO: handle currency not found
return(new ExchangeResult(request.To, _roundCalculator.EnsureRate(result?.Value ?? -1)));
}
public async Task <ExchangeResult> ExchangeAsync(ExchangeRateRequest request, decimal amount)
{
var initialRate = await GetRate(request);
var rate = RoundCalculator.EnsureRate(initialRate);
var resultAmount = RoundCalculator.EnsureExchange(amount, rate);
return(new ExchangeResult(request.To, amount));
}