public async Task <CalculatorResponse> Handle(CalculatorQuery request, CancellationToken cancellationToken)
{
var rate = await _retry.ExecuteAsync <decimal?>(_rateService.GetRateMonthlyAsync);
if (!rate.HasValue)
{
return(Error("Rate Service Unabailable"));
}
var interest = new Interest(request.InitialVale, request.Months, rate.Value);
var validation = interest.IsValidForCalculateInterest();
if (validation.IsSuccess)
{
return(await Task.FromResult(interest.Map()));
}
return(Error(validation.Message));
}