public async Task <ExchangeRate[]> GetExchangeRateAsync(ExchangeRateFetchModel request)
{
var parsedExchangeRates = await exchangeRateProvider.GetExternalExchangeRates(request);
if (!parsedExchangeRates.Any())
{
return(Array.Empty <ExchangeRate>());
}
var imputedExchangeRates = ImputForward(parsedExchangeRates, request.StartTime, request.EndTime);
await exchangeRateRepository.AddRangeAsync(imputedExchangeRates);
return(imputedExchangeRates);
}
