public decimal GetRate()
{
if (Rates == null || !Rates.Any())
{
throw new Exception("Cannot fetch exchange rate.");
}
var ratesOnDate = Rates.First().Value;
if (!ratesOnDate.HasValue)
{
throw new Exception("Cannot fetch exchange rate.");
}
var rateToTargetCurrency = ratesOnDate.Value;
return(rateToTargetCurrency);
}
public async Task <List <RateRecord> > GetRates(bool fromMemory = false)
{
List <RateRecord> records = new List <RateRecord>();
if (_proxy.IsConnected && !fromMemory || _proxy.IsConnected && !Rates.Any())
{
//Try catch in case that proxy disconnect before next keepAlive check to return stored data
try
{
var rates = await _proxy.GetRates();
if (rates != null)
{
Rates.Clear();
}
foreach (var rate in rates)
{
records.Add(rate);
Rates.Add(rate);
}
}
catch (Exception ex)
{
foreach (var rate in Rates)
{
records.Add(rate);
}
}
}
else
{
foreach (var rate in Rates)
{
records.Add(rate);
}
}
return(Rates);
}
private async Task Rate_Coinbase(string base_currency)
{
try
{
var maxAge = AGE_FIAT2FIAT_RATE > AGE_MIXEDRATE_RATE ? AGE_MIXEDRATE_RATE : AGE_FIAT2FIAT_RATE;
if (!Rates.Any(x => x.Base == base_currency) || !Rates.Any(x => x.Quote == base_currency) || Rates.Any(x => (x.Base == base_currency || x.Quote == base_currency) && (DateTime.Now - x.Date > maxAge)))
{
try
{
Dispatcher.Invoke(() => { ExchangeRateInfo.Text = $"Checking [{base_currency}]..."; });
using (WebClient webClient = new())
{
string json = default;
try
{
json = webClient.DownloadString($"https://api.coinbase.com/v2/exchange-rates?currency={base_currency}");
}
catch
{
if (Currencies_Bitfinex.Contains(base_currency))
{
await Rate_Bitfinex(base_currency);
return;
}
}
var deserialized = JsonConvert.DeserializeObject <JSON_Coinbase>(json);
var cur = Currencies.ToArray();
foreach (var quote_currency in cur)
{
if (quote_currency != base_currency)
{
if (deserialized.data.Rates.ContainsKey(quote_currency))
{
if (Requests.FirstOrDefault(x => x.Item1 == base_currency && x.Item2 == quote_currency && x.Item3 != Services.Coinbase) != default)
{
continue;
}
if (Rates.ToList().Exists(x => x.Base == base_currency && x.Quote == quote_currency)) // Update
{
var exrEntry = Rates.FirstOrDefault(x => x.Base == base_currency && x.Quote == quote_currency && x.Exchange == Services.Coinbase);
if (exrEntry != default)
{
exrEntry.Date = DateTime.Now;
exrEntry.Exchange = Services.Coinbase;
exrEntry.Rate = Res.FIAT.Contains(quote_currency) && !Res.FIAT.Contains(base_currency)
? Ext.TruncateDecimal(decimal.Parse(deserialized.data.Rates[quote_currency], NumberStyles.Float, new NumberFormatInfo()
{
NumberDecimalSeparator = "."
}), 2)
: Ext.TruncateDecimal(decimal.Parse(deserialized.data.Rates[quote_currency], NumberStyles.Float, new NumberFormatInfo()
{
NumberDecimalSeparator = "."
}), 8);
Dispatcher.Invoke(() => { ExchangeRateInfo.Text = $"Checking [{base_currency}]... updated."; });
if (DateTime.Now - new TimeSpan(1, 0, 0) > History_Long[(base_currency, quote_currency)].Last().Time)
{
lock (lock_history)
{
History_Long[(base_currency, quote_currency)].Add(new TimeData()
{
Time = DateTime.Now, Rate = (double)exrEntry.Rate
});
if (DateTime.Now - maxAgeLongHistory > History_Long[(base_currency, quote_currency)][0].Time)
{
History_Long[(base_currency, quote_currency)].RemoveAt(0);
}