private async Task ExecuteMarketOrderAsync(MarketOrder marketOrder)
{
AggregatedOrderBook aggregatedOrderBook = _aggregatedOrderBookService.GetByAssetPair(marketOrder.AssetPair);
if (aggregatedOrderBook == null)
{
_log.WarningWithDetails("Can not execute market order the aggregated order book does not exist",
marketOrder);
return;
}
IReadOnlyList <ExternalLimitOrder> externalLimitOrders =
await _externalLimitOrderService.GetByParentIdAsync(marketOrder.Id);
List <ExternalLimitOrder> activeLimitOrders = externalLimitOrders
.Where(o => o.Status == ExternalLimitOrderStatus.Active)
.ToList();
decimal executedVolume = externalLimitOrders
.Where(o => o.Status == ExternalLimitOrderStatus.Filled ||
o.Status == ExternalLimitOrderStatus.PartiallyFilled)
.Sum(o => o.Volume);
decimal remainingVolume = marketOrder.Volume - executedVolume;
bool rerouteFailedLimitOrders;
var excludedExchanges = new List <string>();
do
{
rerouteFailedLimitOrders = false;
IReadOnlyList <ExchangeVolume> volumes;
if (marketOrder.Type == OrderType.Sell)
{
volumes = aggregatedOrderBook.GetBuyVolumes(remainingVolume, activeLimitOrders, excludedExchanges);
}
else
{
volumes = aggregatedOrderBook.GetSellVolumes(remainingVolume, activeLimitOrders, excludedExchanges);
}
if (volumes.Count == 0)
{
_log.WarningWithDetails("Can not execute market order no liquidity in aggregated order book",
new
{
MarketOrder = marketOrder,
RemainingVolume = remainingVolume,
ActiveVolume = activeLimitOrders.Sum(o => o.Volume)
});
break;
}
foreach (ExchangeVolume exchangeVolume in volumes)
{
ExchangeSettings exchangeSettings =
await _exchangeSettingsService.GetByNameAsync(exchangeVolume.Exchange);
decimal price;
if (marketOrder.Type == OrderType.Sell)
{
price = exchangeVolume.Price * (1 - exchangeSettings.SlippageMarkup);
}
else
{
price = exchangeVolume.Price * (1 + exchangeSettings.SlippageMarkup);
}
try
{
ExternalLimitOrder externalLimitOrder =
await _exchangeService.CreateLimitOrderAsync(exchangeVolume.Exchange, marketOrder.AssetPair,
price, exchangeVolume.Volume, marketOrder.Type);
_log.InfoWithDetails("External limit order created", externalLimitOrder);
await _externalLimitOrderService.AddAsync(marketOrder.Id, externalLimitOrder);
activeLimitOrders.Add(externalLimitOrder);
}
catch (Exception exception)
{
rerouteFailedLimitOrders = true;
excludedExchanges.Add(exchangeSettings.Name);
_log.ErrorWithDetails(exception, "An error occurred while creating external limit order",
new
{
MarketOrderId = marketOrder.Id,
exchangeVolume.Exchange,
marketOrder.AssetPair,
Price = price,
exchangeVolume.Volume,
OrderType = marketOrder.Type.ToString()
});
}
}
} while (rerouteFailedLimitOrders);
}
