public async Task <decimal> GetEstimatedAmount(decimal btcAmount, int currencyId)
{
if (currencyId == Constant.BITCOIN_ID)
{
return(btcAmount);
}
var tradePair = await TradePairReader.GetTradePair(currencyId, Constant.BITCOIN_ID).ConfigureAwait(false);
if (tradePair == null)
{
var ltcTradePair = await TradePairReader.GetTradePair(currencyId, Constant.LITECOIN_ID).ConfigureAwait(false);
var ltcbtcTradePair = await TradePairReader.GetTradePair(Constant.LITECOIN_ID, Constant.BITCOIN_ID).ConfigureAwait(false);
if (ltcTradePair == null || ltcbtcTradePair == null)
{
return(0);
}
return((btcAmount / Math.Max(0.00000001m, ltcTradePair.LastTrade)) * Math.Max(0.00000001m, ltcbtcTradePair.LastTrade));
}
return(btcAmount / Math.Max(0.00000001m, tradePair.LastTrade));
}
public async Task <decimal> GetNZDPerCoin(int currencyId)
{
var cacheResult = await CacheService.GetOrSetHybridValueAsync(CacheKey.NZDPerCoin(currencyId), TimeSpan.FromHours(2), async() =>
{
if (currencyId == Constant.NZDT_ID)
{
return(1);
}
var estBtc = await GetEstimatedBTC(1, currencyId);
if (estBtc == 0)
{
return(0);
}
var nzdPrice = await ExternalApiService.ConvertDollarToBTC(1, ConvertDollarToBTCType.NZD);
if (nzdPrice != 0)
{
return(estBtc / nzdPrice);
}
var btc_nzdt = await TradePairReader.GetTradePair(Constant.BITCOIN_ID, Constant.NZDT_ID).ConfigureAwait(false);
if (btc_nzdt == null || btc_nzdt.LastTrade == 0)
{
return(0);
}
return(estBtc *btc_nzdt.LastTrade);
});
return(cacheResult);
}
public async Task <decimal> GetEstimatedNZD(decimal amount, int currencyId)
{
if (amount == 0)
{
return(0);
}
if (currencyId == Constant.NZDT_ID)
{
return(amount);
}
var estBtc = await GetEstimatedBTC(amount, currencyId);
if (estBtc == 0)
{
return(0);
}
var nzdPrice = await ExternalApiService.ConvertDollarToBTC(1, ConvertDollarToBTCType.NZD);
if (nzdPrice != 0)
{
return(estBtc / nzdPrice);
}
var btc_nzdt = await TradePairReader.GetTradePair(Constant.BITCOIN_ID, Constant.NZDT_ID).ConfigureAwait(false);
if (btc_nzdt == null || btc_nzdt.LastTrade == 0)
{
return(0);
}
return(estBtc * btc_nzdt.LastTrade);
}
public async Task <CreateTradeResponseModel> SubmitUserTrade(ApiSubmitUserTradeRequest request)
{
var tradePair = request.TradePairId.HasValue
? await TradePairReader.GetTradePair(request.TradePairId.Value).ConfigureAwait(false)
: await TradePairReader.GetTradePair(request.Market.Replace('/', '_')).ConfigureAwait(false);
if (tradePair == null)
{
var marketName = request.TradePairId.HasValue ? request.TradePairId.ToString() : request.Market;
return(new CreateTradeResponseModel {
Error = $"Market '{marketName}' not found."
});
}
var totalTrade = request.Amount * request.Rate;
if (totalTrade < tradePair.BaseMinTrade)
{
return new CreateTradeResponseModel {
Error = $"Invalid trade amount, Minimum total trade is {tradePair.BaseMinTrade} {tradePair.BaseSymbol}"
}
}
;
var response = await TradeService.CreateTrade(request.UserId.ToString(), new CreateTradeModel
{
Amount = request.Amount,
Price = request.Rate,
TradePairId = tradePair.TradePairId,
IsBuy = request.Type == TradeHistoryType.Buy,
}, true).ConfigureAwait(false);
return(response);
}
public async Task <decimal> GetEstimatedValue(decimal amount, int currencyId, int baseCurrency)
{
var tradePair = await TradePairReader.GetTradePair(currencyId, baseCurrency).ConfigureAwait(false);
if (tradePair != null)
{
return(amount * tradePair.LastTrade);
}
return(0);
}
public async Task <decimal> GetEstimatedBTC(decimal amount, int currencyId)
{
if (amount == 0)
{
return(0);
}
if (currencyId == Constant.BITCOIN_ID)
{
return(amount);
}
if (currencyId == Constant.USDT_ID)
{
var btc_usdt = await TradePairReader.GetTradePair(Constant.BITCOIN_ID, Constant.USDT_ID).ConfigureAwait(false);
if (btc_usdt == null || btc_usdt.LastTrade == 0)
{
return(0);
}
return(amount / btc_usdt.LastTrade);
}
if (currencyId == Constant.NZDT_ID)
{
var btc_nzdt = await TradePairReader.GetTradePair(Constant.BITCOIN_ID, Constant.NZDT_ID).ConfigureAwait(false);
if (btc_nzdt == null || btc_nzdt.LastTrade == 0)
{
return(0);
}
return(amount / btc_nzdt.LastTrade);
}
var tradePair = await TradePairReader.GetTradePair(currencyId, Constant.BITCOIN_ID).ConfigureAwait(false);
if (tradePair == null)
{
var ltcTradePair = await TradePairReader.GetTradePair(currencyId, Constant.LITECOIN_ID).ConfigureAwait(false);
var ltcbtcTradePair = await TradePairReader.GetTradePair(Constant.LITECOIN_ID, Constant.BITCOIN_ID).ConfigureAwait(false);
if (ltcTradePair == null || ltcbtcTradePair == null)
{
return(0);
}
return((amount * ltcTradePair.LastTrade) * ltcbtcTradePair.LastTrade);
}
return(amount * tradePair.LastTrade);
}
public async Task <ActionResult> SubmitTrade(SubmitTradeModel model)
{
if (!ModelState.IsValid)
{
return(JsonError(ModelState.FirstError()));
}
var tradePair = await TradePairReader.GetTradePair(model.TradePairId);
if (tradePair == null)
{
return(JsonError(Resources.Exchange.tradeNoMarketError));
}
if (model.Amount * model.Price < tradePair.BaseMinTrade)
{
return(JsonError(string.Format(Resources.Exchange.tradeMinTotalError, $"{tradePair.BaseMinTrade:F8}", tradePair.BaseSymbol)));
}
if (model.Amount >= 1000000000 || (model.Amount * model.Price) >= 1000000000)
{
return(JsonError(string.Format(Resources.Exchange.tradeMaxAmountError, "1000000000")));
}
if (model.Price < 0.00000001m)
{
return(JsonError(string.Format(Resources.Exchange.tradeMinPriceError, "0.00000001")));
}
if (model.Price > 1000000000)
{
return(JsonError(string.Format(Resources.Exchange.tradeMaxPriceError, "1000000000")));
}
var response = await TradeService.CreateTrade(User.Identity.GetUserId(), new CreateTradeModel
{
Amount = model.Amount,
IsBuy = model.IsBuy,
Price = model.Price,
TradePairId = tradePair.TradePairId
});
if (response.IsError)
{
return(JsonError(response.Error));
}
await response.Notifications.SendNotifications();
await response.DataUpdates.SendTradeNotifications();
return(JsonSuccess());
}
public async Task <ActionResult> GetTradePairData(int tradepairId)
{
var ticker = await TradePairReader.GetTicker(tradepairId);
var tradePair = await TradePairReader.GetTradePair(tradepairId);
var orderbookData = await ExchangeReader.GetOrderBook(User.Identity.GetUserId(), tradepairId);
var historyData = await ExchangeReader.GetTradeHistory(tradepairId);
return(Json(new
{
Success = true,
TradePair = tradePair,
Ticker = ticker,
Buys = orderbookData.BuyData,
Sells = orderbookData.SellData,
History = historyData
}));
}
public async Task <ActionResult> Index(int?id, string market, string basemarket = "BTC")
{
var viewModel = new ExchangeModel();
var baseCurrencies = await CurrencyReader.GetBaseCurrencies();
var baseMarket = baseCurrencies.FirstOrDefault(x => x.Symbol == basemarket)
?? baseCurrencies.FirstOrDefault(x => x.Symbol == "BTC");
var tradePair = id.HasValue
? await TradePairReader.GetTradePair(id.Value)
: await TradePairReader.GetTradePair(market);
viewModel.TradePair = tradePair;
viewModel.BaseCurrencies = baseCurrencies;
viewModel.BaseMarket = baseMarket?.Symbol ?? "BTC";
if (viewModel.TradePair == null)
{
viewModel.TradePair = new TradePairModel();
viewModel.Summary = await ExchangeReader.GetExchangeSummary();
viewModel.Summary.BaseMarket = baseMarket?.Symbol ?? "BTC";
}
return(View("Exchange", viewModel));
}
public async Task <ApiUserTradeHistoryResponse> GetUserTradeHistory(ApiUserTradeHistoryRequest request)
{
var count = Math.Min(request.Count ?? 100, 1000);
if (request.TradePairId.HasValue || !string.IsNullOrEmpty(request.Market))
{
var tradepair = request.TradePairId.HasValue
? await TradePairReader.GetTradePair(request.TradePairId.Value, true).ConfigureAwait(false)
: await TradePairReader.GetTradePair(request.Market.Replace('/', '_'), true).ConfigureAwait(false);
if (tradepair == null)
{
return new ApiUserTradeHistoryResponse {
Success = false, Error = "Market not found."
}
}
;
var cacheResult = await CacheService.GetOrSetMemoryAsync(CacheKey.ApiUserTradeHistory(request.UserId.ToString(), tradepair.TradePairId), TimeSpan.FromSeconds(1), async() =>
{
using (var context = ExchangeDataContextFactory.CreateReadOnlyContext())
{
var history = context.TradeHistory
.AsNoTracking()
.Where(x => x.TradePairId == tradepair.TradePairId && (x.UserId == request.UserId || x.ToUserId == request.UserId))
.OrderByDescending(x => x.Id)
.Take(1000)
.Select(x => new ApiTradeHistory
{
Market = string.Concat(x.TradePair.Currency1.Symbol, "/", x.TradePair.Currency2.Symbol),
TradeId = x.Id,
Amount = x.Amount,
Rate = x.Rate,
Type = x.UserId == request.UserId
? TradeHistoryType.Buy.ToString()
: TradeHistoryType.Sell.ToString(),
TimeStamp = x.Timestamp,
TradePairId = x.TradePairId,
Fee = x.Fee
});
return(await history.ToListNoLockAsync().ConfigureAwait(false));
}
}).ConfigureAwait(false);
return(new ApiUserTradeHistoryResponse
{
Success = true,
Data = cacheResult.Take(count).ToList()
});
}
else
{
var cacheResult = await CacheService.GetOrSetHybridAsync(CacheKey.ApiUserTradeHistory(request.UserId.ToString()), TimeSpan.FromSeconds(20), async() =>
{
using (var context = ExchangeDataContextFactory.CreateReadOnlyContext())
{
var history = context.TradeHistory
.AsNoTracking()
.Where(x => x.UserId == request.UserId || x.ToUserId == request.UserId)
.OrderByDescending(x => x.Id)
.Take(1000)
.Select(x => new ApiTradeHistory
{
Market = string.Concat(x.TradePair.Currency1.Symbol, "/", x.TradePair.Currency2.Symbol),
TradeId = x.Id,
Amount = x.Amount,
Rate = x.Rate,
Type = x.UserId == request.UserId
? TradeHistoryType.Buy.ToString()
: TradeHistoryType.Sell.ToString(),
TimeStamp = x.Timestamp,
TradePairId = x.TradePairId,
Fee = x.Fee
});
return(await history.ToListNoLockAsync().ConfigureAwait(false));
}
}).ConfigureAwait(false);
return(new ApiUserTradeHistoryResponse
{
Success = true,
Data = cacheResult.Take(count).ToList()
});
}
}
public async Task <ApiUserOpenOrdersResponse> GetUserOpenOrders(ApiUserOpenOrdersRequest request)
{
if (request.TradePairId.HasValue || !string.IsNullOrEmpty(request.Market))
{
var tradepair = request.TradePairId.HasValue
? await TradePairReader.GetTradePair(request.TradePairId.Value, true).ConfigureAwait(false)
: await TradePairReader.GetTradePair(request.Market.Replace('/', '_'), true).ConfigureAwait(false);
if (tradepair == null)
{
return new ApiUserOpenOrdersResponse {
Success = false, Error = "Market not found."
}
}
;
using (var context = ExchangeDataContextFactory.CreateReadOnlyContext())
{
var openOrders = context.Trade
.AsNoTracking()
.Where(x => x.UserId == request.UserId && x.TradePairId == tradepair.TradePairId && (x.Status == TradeStatus.Partial || x.Status == TradeStatus.Pending))
.OrderByDescending(x => x.Id)
.Select(x => new ApiOpenOrder
{
Amount = x.Amount,
Market = string.Concat(x.TradePair.Currency1.Symbol, "/", x.TradePair.Currency2.Symbol),
OrderId = x.Id,
Rate = x.Rate,
Remaining = x.Remaining,
TimeStamp = x.Timestamp,
TradePairId = x.TradePairId,
Type = x.Type.ToString()
});
return(new ApiUserOpenOrdersResponse
{
Success = true,
Data = await openOrders.ToListNoLockAsync().ConfigureAwait(false)
});
}
}
else
{
using (var context = ExchangeDataContextFactory.CreateReadOnlyContext())
{
var openOrders = context.Trade
.AsNoTracking()
.Where(x => x.UserId == request.UserId && (x.Status == TradeStatus.Partial || x.Status == TradeStatus.Pending))
.OrderByDescending(x => x.Id)
.Select(x => new ApiOpenOrder
{
Amount = x.Amount,
Market = string.Concat(x.TradePair.Currency1.Symbol, "/", x.TradePair.Currency2.Symbol),
OrderId = x.Id,
Rate = x.Rate,
Remaining = x.Remaining,
TimeStamp = x.Timestamp,
TradePairId = x.TradePairId,
Type = x.Type.ToString()
});
return(new ApiUserOpenOrdersResponse
{
Success = true,
Data = await openOrders.ToListNoLockAsync().ConfigureAwait(false)
});
}
}
}