public bool CanBuy(BuyOptions options, out string message)
{
IPairConfig pairConfig = GetPairConfig(options.Pair);
if (!options.ManualOrder && !options.Swap && IsTradingSuspended)
{
message = $"Cancel buy request for {options.Pair}. Reason: trading suspended";
return(false);
}
else if (!options.ManualOrder && !options.Swap && !pairConfig.BuyEnabled)
{
message = $"Cancel buy request for {options.Pair}. Reason: buying not enabled";
return(false);
}
else if (!options.ManualOrder && Config.ExcludedPairs.Contains(options.Pair))
{
message = $"Cancel buy request for {options.Pair}. Reason: exluded pair";
return(false);
}
else if (!options.ManualOrder && !options.IgnoreExisting && Account.HasTradingPair(options.Pair))
{
message = $"Cancel buy request for {options.Pair}. Reason: pair already exists";
return(false);
}
else if (!options.ManualOrder && !options.Swap && Config.MaxPairs != 0 && Account.GetTradingPairs().Count() >= Config.MaxPairs && !Account.HasTradingPair(options.Pair))
{
message = $"Cancel buy request for {options.Pair}. Reason: maximum pairs reached";
return(false);
}
else if (!options.ManualOrder && !options.Swap && pairConfig.BuyMinBalance != 0 && (Account.GetBalance() - options.MaxCost) < pairConfig.BuyMinBalance)
{
message = $"Cancel buy request for {options.Pair}. Reason: minimum balance reached";
return(false);
}
else if (GetCurrentPrice(options.Pair) <= 0)
{
message = $"Cancel buy request for {options.Pair}. Reason: invalid price";
return(false);
}
else if (Account.GetBalance() < options.MaxCost)
{
message = $"Cancel buy request for {options.Pair}. Reason: not enough balance";
return(false);
}
else if (options.Amount == null && options.MaxCost == null || options.Amount != null && options.MaxCost != null)
{
message = $"Cancel buy request for {options.Pair}. Reason: either max cost or amount needs to be specified (not both)";
}
else if (!options.ManualOrder && !options.Swap && pairConfig.BuySamePairTimeout > 0 && OrderHistory.Any(h => h.Side == OrderSide.Buy && h.Pair == options.Pair) &&
(DateTimeOffset.Now - OrderHistory.Where(h => h.Pair == options.Pair).Max(h => h.Date)).TotalSeconds < pairConfig.BuySamePairTimeout)
{
var elapsedSeconds = (DateTimeOffset.Now - OrderHistory.Where(h => h.Pair == options.Pair).Max(h => h.Date)).TotalSeconds;
message = $"Cancel buy request for {options.Pair}. Reason: buy same pair timeout (elapsed: {elapsedSeconds:0.#}, timeout: {pairConfig.BuySamePairTimeout:0.#})";
return(false);
}
message = null;
return(true);
}