public MarketBase(MetaDaemonApi daemon, MarketRow market, BitsharesWallet bitshares, BitcoinWallet bitcoin, string bitsharesAccount)
{
m_daemon = daemon;
m_market = market;
m_bitshares = bitshares;
m_bitcoin = bitcoin;
m_bitsharesAccount = bitsharesAccount;
}
/// <summary> Updates the market in database described by market. </summary>
///
/// <remarks> Paul, 05/02/2015. </remarks>
///
/// <param name="market"> The market. </param>
public bool UpdateMarketInDatabase(MarketRow market)
{
return m_database.Statement( "UPDATE markets SET ask=@a, bid=@b, ask_max=@c, bid_max=@d, ask_fee_percent=@e, bid_fee_percent=@f WHERE symbol_pair=@g;",
market.ask, market.bid, market.ask_max, market.bid_max, market.ask_fee_percent, market.bid_fee_percent, market.symbol_pair) > 0;
}
/// <summary> Updates the market in database described by market. </summary>
///
/// <remarks> Paul, 05/02/2015. </remarks>
///
/// <param name="market"> The market. </param>
protected void UpdateMarketInDatabase(MarketRow market)
{
bool updated = m_dataAccess.UpdateMarketInDatabase(market);
Debug.Assert(updated);
}
/// <summary> Handles the command. </summary>
///
/// <remarks> Paul, 26/02/2015. </remarks>
///
/// <param name="l"> The BitsharesLedgerEntry to process. </param>
/// <param name="handler"> The handler. </param>
/// <param name="market"> The market. </param>
///
/// <returns> true if it succeeds, false if it fails. </returns>
public bool HandleCommand(BitsharesLedgerEntry l, MarketBase handler, MarketRow market, string trxid)
{
if (m_adminUsernames.Contains(l.from_account))
{
try
{
string[] parts = l.memo.Split(' ');
if (l.memo.StartsWith(kSetPricesMemoStart))
{
HandlePriceSetting(parts, l, handler, market);
return true;
}
else if (l.memo.StartsWith(kWithdrawMemo))
{
// process withdrawal
if (parts[0] == kWithdrawMemo)
{
// make sure we didn't already process this transaction!
if (!m_dataAccess.IsWithdrawalProcessed(trxid))
{
decimal amount = decimal.Parse(parts[1]);
CurrenciesRow type = CurrencyHelpers.FromSymbol(parts[2], m_allCurrencies);
string to;
string txid;
if ( !CurrencyHelpers.IsBitsharesAsset(type) )
{
to = m_dataAccess.GetStats().bitcoin_withdraw_address;
Debug.Assert(to != null);
txid = m_bitcoin.SendToAddress(to, amount);
}
else
{
to = l.from_account;
BitsharesTransactionResponse response = m_bitshares.WalletTransfer(amount, CurrencyHelpers.ToBitsharesSymbol(type), m_bitsharesAccount, to);
txid = response.record_id;
}
// log in DB
m_dataAccess.InsertWithdrawal(trxid, txid, type.ToString(), amount, to, DateTime.UtcNow);
}
return true;
}
}
}
catch (Exception e)
{
LogGeneralException(e.ToString());
}
}
return false;
}
/// <summary> Handles the price setting. </summary>
///
/// <remarks> Paul, 14/02/2015. </remarks>
///
/// <param name="l"> The BitsharesLedgerEntry to process. </param>
/// <param name="handler"> The handler. </param>
/// <param name="market"> The market. </param>
void HandlePriceSetting(string[] parts, BitsharesLedgerEntry l, MarketBase handler, MarketRow market)
{
// parse
if (parts[0] == kSetPricesMemoStart)
{
if (parts[1] == market.symbol_pair)
{
// setting is for this market!
decimal basePrice = decimal.Parse(parts[2]);
decimal quotePrice = decimal.Parse(parts[3]);
// go do it!
handler.SetPricesFromSingleUnitQuantities(basePrice, quotePrice, market.flipped, market);
}
}
}
/// <summary> Creates handler for market. </summary>
///
/// <remarks> Paul, 05/02/2015. </remarks>
///
/// <exception cref="UnexpectedCaseException"> Thrown when an Unexpected Case error condition
/// occurs. </exception>
///
/// <param name="market"> The market. </param>
///
/// <returns> The new handler for market. </returns>
MarketBase CreateHandlerForMarket(MarketRow market)
{
CurrenciesRow @base, quote;
CurrencyHelpers.GetBaseAndQuoteFromSymbolPair(market.symbol_pair, m_allCurrencies, out @base, out quote);
if ( CurrencyHelpers.IsBitsharesAsset(@base) && !CurrencyHelpers.IsBitsharesAsset(quote))
{
return new InternalMarket(this, market, m_bitshares, m_bitcoin, m_bitsharesAccount, @base);
}
else if (!CurrencyHelpers.IsBitsharesAsset(@base) && CurrencyHelpers.IsBitsharesAsset(quote))
{
return new InternalMarket(this, market, m_bitshares, m_bitcoin, m_bitsharesAccount, @quote);
}
else
{
throw new UnexpectedCaseException();
}
}
/// <summary> Sets prices from single unit quantities. </summary>
///
/// <remarks> Paul, 14/02/2015. </remarks>
///
/// <exception cref="Exception"> Thrown when an exception error condition occurs. </exception>
///
/// <param name="baseQuantity"> The base quantity. </param>
/// <param name="quoteQuantity"> The quote quantity. </param>
public virtual void SetPricesFromSingleUnitQuantities(decimal baseQuantity, decimal quoteQuantity, bool flipped, MarketRow market)
{
decimal bid, ask;
decimal buyFee = baseQuantity * market.bid_fee_percent/100;
decimal sellFee = quoteQuantity * market.ask_fee_percent/100;
baseQuantity -= buyFee;
quoteQuantity += sellFee;
if (flipped)
{
bid = baseQuantity;
ask = quoteQuantity;
}
else
{
bid = 1 / baseQuantity;
ask = 1 / quoteQuantity;
}
if (Math.Abs(bid - m_market.bid) > m_market.bid / 10 ||
Math.Abs(ask - m_market.ask) > m_market.ask / 10)
{
throw new Exception("New prices are too different!");
}
int updated = m_daemon.UpdateMarketPrices(m_market.symbol_pair, bid, ask);
if (updated == 0)
{
throw new Exception("No market row updated!");
}
else
{
m_market.ask = ask;
m_market.bid = bid;
}
m_isDirty = true;
}
/// <summary> Calculates the market prices and limits./ </summary>
///
/// <remarks> Paul, 19/02/2015. </remarks>
///
/// <param name="market"> [in,out] The market. </param>
/// <param name="bitsharesBalances"> The bitshares balances. </param>
/// <param name="bitcoinBalances"> The bitcoin balances. </param>
///
/// <returns> Whether the prices were updated </returns>
public virtual void ComputeMarketPricesAndLimits(ref MarketRow market, Dictionary<int, ulong> bitsharesBalances, decimal bitcoinBalances)
{
m_market = market;
}
