Task <AuthorizationAPIResult> INodeAPI.Trade(TradeBlock block)
{
throw new NotImplementedException();
}
public void SetBlock(TradeBlock block)
{
TradeBlockData = JsonConvert.SerializeObject(block);
}
public async Task <AuthorizationAPIResult> TradeAsync(TradeBlock block)
{
return(await PostBlockAsync("Trade", block));
}
public override APIResultCodes Authorize <T>(ref T tblock)
{
if (!(tblock is TradeOrderBlock))
{
return(APIResultCodes.InvalidBlockType);
}
var block = tblock as TradeOrderBlock;
if (block.MaxQuantity != 1)
{
return(APIResultCodes.FeatureIsNotSupported);
}
// 1. check if the account already exists
if (!_accountCollection.AccountExists(block.AccountID))
{
return(APIResultCodes.AccountDoesNotExist);
}
TransactionBlock lastBlock = _accountCollection.FindLatestBlock(block.AccountID);
if (lastBlock == null)
{
return(APIResultCodes.CouldNotFindLatestBlock);
}
var result = VerifyBlock(block, lastBlock);
if (result != APIResultCodes.Success)
{
return(result);
}
//if (lastBlock.Balances[LyraGlobal.LYRA_TICKER_CODE] <= block.Balances[LyraGlobal.LYRA_TICKER_CODE] + block.Fee)
// return AuthorizationResultCodes.NegativeTransactionAmount;
// Validate the destination account id (should be empty)
if (!string.IsNullOrWhiteSpace(block.DestinationAccountId))
{
return(APIResultCodes.InvalidDestinationAccountId);
}
result = VerifyTransactionBlock(block);
if (result != APIResultCodes.Success)
{
return(result);
}
if (!block.ValidateTransaction(lastBlock))
{
return(APIResultCodes.TradeOrderValidationFailed);
}
var transaction = block.GetTransaction(lastBlock);
if (block.MinTradeAmount < 0 || block.MinTradeAmount > block.TradeAmount)
{
return(APIResultCodes.TradeOrderValidationFailed);
}
if (block.SellTokenCode != transaction.TokenCode)
{
return(APIResultCodes.TradeOrderValidationFailed);
}
var token = _accountCollection.FindTokenGenesisBlock(null, block.BuyTokenCode);
if (token == null)
{
return(APIResultCodes.TradeOrderValidationFailed);
}
bool res = (block.OrderType == TradeOrderTypes.Sell) ? ValidateSellOrder(block, transaction) : ValidateBuyOrder(block, transaction);
if (!res)
{
return(APIResultCodes.TradeOrderValidationFailed);
}
MatchTradeBlock = _TradeMatchEngine.Match(block);
if (MatchTradeBlock != null)
{
return(APIResultCodes.TradeOrderMatchFound);
}
Sign(ref block);
_accountCollection.AddBlock(block);
_TradeMatchEngine.AddOrder(block);
return(base.Authorize(ref tblock));
}
public TradeBlock Match(TradeOrderBlock order)
{
// Currently we only support nonfungible trades, with one trade per order (MaxQuantity = 1).
// An order becomes inactive after first trade/execution.
if (order.MaxQuantity != 1)
{
return(null);
}
if (order.OrderType == TradeOrderTypes.Buy)
{
if (ActiveSellOrders == null)
{
return(null);
}
foreach (TradeOrderBlock sellorder in ActiveSellOrders.Values)
{
if (order.BuyTokenCode == sellorder.SellTokenCode &&
order.SellTokenCode == sellorder.BuyTokenCode &&
order.TradeAmount <= sellorder.TradeAmount &&
order.TradeAmount >= sellorder.MinTradeAmount &&
order.Price >= sellorder.Price)
{
int sell_token_precision = FindTokenPrecision(order.SellTokenCode);
if (sell_token_precision < 0)
{
continue;
}
int buy_token_precision = FindTokenPrecision(order.BuyTokenCode);
if (buy_token_precision < 0)
{
continue;
}
var trade = new TradeBlock();
trade.AccountID = order.AccountID;
trade.SellTokenCode = order.SellTokenCode;
trade.BuyTokenCode = order.BuyTokenCode;
trade.BuyAmount = order.TradeAmount;
if (sellorder.CoverAnotherTradersFee)
{
trade.Fee = 0;
trade.FeeType = AuthorizationFeeTypes.NoFee;
}
else
if (sellorder.AnotherTraderWillCoverFee)
{
trade.Fee = _ServiceAccount.GetLastServiceBlock().TradeFee * 2;
trade.FeeType = AuthorizationFeeTypes.BothParties;
}
else
{
trade.Fee = _ServiceAccount.GetLastServiceBlock().TradeFee;
trade.FeeType = AuthorizationFeeTypes.Regular;
}
// We take the seller's price since it can be lower that the one offered by the buyer.
// If it is really lower, the Trade block should take into account the fact that the buyers pays less than expected.
// It is achieved by getting a "change" to the balance of SellToken.
// The Authorizer should also take this difference into account as the TransactionInfo and SellAmount can be different.
// It can be validated by formula: Original Buy Order's MaxAmount * Price = Trade.SellAmount + "Change"
//decimal real_price = sellorder.Price / (decimal)Math.Pow(10, sell_token_precision);
//decimal real_buy_amount = trade.BuyAmount / (decimal)Math.Pow(10, buy_token_precision);
//trade.SellAmount = (long)(real_price * real_buy_amount * (decimal)Math.Pow(10, sell_token_precision));
trade.SellAmount = order.TradeAmount * sellorder.Price;
trade.Balances = new Dictionary <string, decimal>();
trade.DestinationAccountId = sellorder.AccountID;
trade.TradeOrderId = sellorder.Hash;
return(trade);
}
}
}
return(null);
}
