public virtual async Task <ExchangeRatesList> GetExchangeRatesList(string BaseCurrencySymbol, params string[] TargetedCurrencies)
{
BaseCurrencySymbol = BaseCurrencySymbol.ToUpper();
TargetedCurrencies = TargetedCurrencies.Select(e => e.ToUpper()).ToArray();
if (!supportedCryptoCurrencies.ContainsKey(BaseCurrencySymbol))
{
throw new InvalidRequestException($"{BaseCurrencySymbol} is invalid or Unsupported Cryptocurrency");
}
if (TargetedCurrencies == null || TargetedCurrencies.Length == 0)
{
TargetedCurrencies = _config.DefaultTargetedCurrencies.ToArray();
}
else
{
var unsupportedCurrencies = TargetedCurrencies.Except(_config.SupportedTargetedCurrencies);
if (unsupportedCurrencies.Count() == TargetedCurrencies.Length)
{
throw new InvalidRequestException($"[{string.Join(",", unsupportedCurrencies)}] are Unsupported fiat currencies");
}
if (unsupportedCurrencies.Any())
{
_logger.LogWarning("[{0}] are invalid or Unsupported fiat currencies", string.Join(",", unsupportedCurrencies));
TargetedCurrencies = TargetedCurrencies.Except(unsupportedCurrencies).ToArray();
}
}
string cryptoCurId = supportedCryptoCurrencies[BaseCurrencySymbol].ToString();
var query = HttpUtility.ParseQueryString(String.Empty);
query["id"] = cryptoCurId;
query["convert"] = string.Join(",", TargetedCurrencies);
query["aux"] = "is_active"; // adding this parameter to reduce the size of the response
var request = new HttpRequestMessage(HttpMethod.Get, $"/{_config.Version}/{_config.QuotesEndpoint}?{query}");
request.Headers.Add(_config.APIKeyName, _config.APIKeyValue);
var httpclient = _httpClientFactory.CreateClient(ServiceProviderName);
var response = await httpclient.SendAsync(request);
var responseString = await response.Content.ReadAsStringAsync();
var CoinmarketcapAPIResponse = JsonConvert.DeserializeObject <CoinmarketcapAPIQuotesResponse>(responseString);
if (response.IsSuccessStatusCode)
{
if (CoinmarketcapAPIResponse?.Status?.ErrorCode == 0 &&
CoinmarketcapAPIResponse.Status.ErrorMessage == null &&
CoinmarketcapAPIResponse.Status.CreditCount > 0 &&
CoinmarketcapAPIResponse.Data?.Count > 0 &&
CoinmarketcapAPIResponse.Data.Count > 0 &&
CoinmarketcapAPIResponse.Data.ContainsKey(cryptoCurId)
)
{
return(new ExchangeRatesList()
{
BaseCurrencySymbol = CoinmarketcapAPIResponse.Data[cryptoCurId].CryptoCurrencySymbol,
CurrenciesRates = CoinmarketcapAPIResponse.Data[cryptoCurId].Quote.Where(e => TargetedCurrencies.Contains(e.Key)).ToDictionary(key => key.Key, val => val.Value.Rate)
});
}
}
throw new RestAPIException(ServiceProviderName, response.StatusCode, CoinmarketcapAPIResponse.Status.ErrorMessage);
}
public override async Task <ExchangeRatesList> GetExchangeRatesList(string BaseCurrencySymbol, params string[] TargetedCurrencies)
{
BaseCurrencySymbol = BaseCurrencySymbol.ToUpper();
TargetedCurrencies = TargetedCurrencies.Select(e => e.ToUpper()).ToArray();
if (!supportedCurrencies.Contains(BaseCurrencySymbol))
{
throw new InvalidRequestException($"{BaseCurrencySymbol} is Unsupported currency");
}
if (TargetedCurrencies == null || TargetedCurrencies.Length == 0)
{
TargetedCurrencies = _config.DefaultTargetedCurrencies.ToArray();
}
List <string> newTargets = new List <string>();
ExchangeRatesList exchangeRatesList = new ExchangeRatesList()
{
BaseCurrencySymbol = BaseCurrencySymbol
};
foreach (var targetedcurrency in TargetedCurrencies)
{
decimal rate;
if (_memoryCache.TryGetValue(GetCacheKey(BaseCurrencySymbol, targetedcurrency), out rate))
{
exchangeRatesList.CurrenciesRates.Add(targetedcurrency, rate);
}
else
{
newTargets.Add(targetedcurrency);
}
}
if (newTargets.Count > 0)
{
_logger.LogInformation($"Requesting ExchangeRates of {string.Join(",", newTargets)} from {ServiceProviderName} Provider");
var rates = await base.GetExchangeRatesList(BaseCurrencySymbol, newTargets.ToArray());
foreach (var rate in rates.CurrenciesRates)
{
_memoryCache.Set(GetCacheKey(BaseCurrencySymbol, rate.Key), rate.Value, DateTimeOffset.Now.AddMinutes(_config.ExpiredAfterInMinutes));
exchangeRatesList.CurrenciesRates.Add(rate.Key, rate.Value);
}
}
return(exchangeRatesList);
}
public virtual async Task <ExchangeRatesList> GetExchangeRatesList(string BaseCurrencySymbol, params string[] TargetedCurrencies)
{
// validate the input parameters
BaseCurrencySymbol = BaseCurrencySymbol.ToUpper();
TargetedCurrencies = TargetedCurrencies.Select(e => e.ToUpper()).ToArray();
if (!supportedCurrencies.Contains(BaseCurrencySymbol))
{
throw new InvalidRequestException($"{BaseCurrencySymbol} is Unsupported currency");
}
if (TargetedCurrencies == null || TargetedCurrencies.Length == 0)
{
TargetedCurrencies = _config.DefaultTargetedCurrencies.ToArray();
}
else
{
var unsupportedCurrencies = TargetedCurrencies.Except(supportedCurrencies);
if (unsupportedCurrencies.Count() == TargetedCurrencies.Length)
{
throw new InvalidRequestException($"[{string.Join(",", unsupportedCurrencies)}] are Unsupported currencies");
}
if (unsupportedCurrencies.Any())
{
_logger.LogWarning("[{0}] are invalid or Unsupported currencies", string.Join(",", unsupportedCurrencies));
TargetedCurrencies = TargetedCurrencies.Except(unsupportedCurrencies).ToArray();
}
}
// calling the currency exchange provider
var query = HttpUtility.ParseQueryString(string.Empty);
query["base"] = BaseCurrencySymbol;
query["symbols"] = string.Join(",", TargetedCurrencies);
var exchangeratesAPIResponse = await SendRequestAsync(query.ToString());
return(new ExchangeRatesList()
{
BaseCurrencySymbol = exchangeratesAPIResponse.BaseCurrency,
CurrenciesRates = exchangeratesAPIResponse.Rates
});
}