public IRateProvider GetRateProvider(BTCPayNetwork network, RateRules rules)
{
rules = rules ?? new RateRules();
var rateProvider = GetDefaultRateProvider(network);
if (!rules.PreferredExchange.IsCoinAverage())
{
rateProvider = CreateExchangeRateProvider(network, rules.PreferredExchange);
}
rateProvider = CreateCachedRateProvider(network, rateProvider, rules.PreferredExchange);
return(new TweakRateProvider(network, rateProvider, rules));
}
public TweakRateProvider(BTCPayNetwork network, IRateProvider rateProvider, RateRules rateRules)
{
if (network == null)
{
throw new ArgumentNullException(nameof(network));
}
if (rateProvider == null)
{
throw new ArgumentNullException(nameof(rateProvider));
}
if (rateRules == null)
{
throw new ArgumentNullException(nameof(rateRules));
}
this.network = network;
this.rateProvider = rateProvider;
this.rateRules = rateRules;
}
public Dictionary <CurrencyPair, Task <RateResult> > FetchRates(HashSet <CurrencyPair> pairs, RateRules rules, CancellationToken cancellationToken)
{
if (rules == null)
{
throw new ArgumentNullException(nameof(rules));
}
var fetchingRates = new Dictionary <CurrencyPair, Task <RateResult> >();
var fetchingExchanges = new Dictionary <string, Task <QueryRateResult> >();
var consolidatedRates = new ExchangeRates();
foreach (var i in pairs.Select(p => (Pair: p, RateRule: rules.GetRuleFor(p))))
{
var dependentQueries = new List <Task <QueryRateResult> >();
foreach (var requiredExchange in i.RateRule.ExchangeRates)
{
if (!fetchingExchanges.TryGetValue(requiredExchange.Exchange, out var fetching))
{
fetching = _rateProviderFactory.QueryRates(requiredExchange.Exchange, cancellationToken);
fetchingExchanges.Add(requiredExchange.Exchange, fetching);
}
dependentQueries.Add(fetching);
}
fetchingRates.Add(i.Pair, GetRuleValue(dependentQueries, i.RateRule));
}
return(fetchingRates);
}
public async Task <RateResult> FetchRate(CurrencyPair pair, RateRules rules, CancellationToken cancellationToken)
{
return(await FetchRates(new HashSet <CurrencyPair>(new[] { pair }), rules, cancellationToken).First().Value);
}
public IRateProvider GetRateProvider(BTCPayNetwork network, RateRules rules)
{
return(_Mocks.FirstOrDefault(m => m.CryptoCode == network.CryptoCode));
}