mirror of
https://github.com/c9s/bbgo.git
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390 lines
9.2 KiB
Go
390 lines
9.2 KiB
Go
package backtest
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import (
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"sync"
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"sync/atomic"
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"time"
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"github.com/pkg/errors"
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"github.com/c9s/bbgo/pkg/fixedpoint"
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"github.com/c9s/bbgo/pkg/types"
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)
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// DefaultFeeRate set the fee rate for most cases
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// BINANCE uses 0.1% for both maker and taker
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// MAX uses 0.050% for maker and 0.15% for taker
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const DefaultFeeRate = 0.15 * 0.001
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var orderID uint64 = 1
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var tradeID uint64 = 1
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func incOrderID() uint64 {
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return atomic.AddUint64(&orderID, 1)
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}
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func incTradeID() uint64 {
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return atomic.AddUint64(&tradeID, 1)
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}
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// SimplePriceMatching implements a simple kline data driven matching engine for backtest
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type SimplePriceMatching struct {
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Symbol string
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Market types.Market
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mu sync.Mutex
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bidOrders []types.Order
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askOrders []types.Order
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LastPrice fixedpoint.Value
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CurrentTime time.Time
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Account *types.Account
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MakerCommission int `json:"makerCommission"`
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TakerCommission int `json:"takerCommission"`
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}
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func (m *SimplePriceMatching) CancelOrder(o types.Order) (types.Order, error) {
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found := false
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switch o.Side {
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case types.SideTypeBuy:
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m.mu.Lock()
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var orders []types.Order
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for _, order := range m.bidOrders {
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if o.OrderID == order.OrderID {
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found = true
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continue
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}
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orders = append(orders, order)
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}
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m.bidOrders = orders
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m.mu.Unlock()
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case types.SideTypeSell:
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m.mu.Lock()
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var orders []types.Order
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for _, order := range m.bidOrders {
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if o.OrderID == order.OrderID {
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found = true
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continue
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}
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orders = append(orders, order)
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}
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m.bidOrders = orders
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m.mu.Unlock()
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}
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if !found {
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return o, errors.Errorf("cancel order failed, order not found")
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}
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o.Status = types.OrderStatusCanceled
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return o, nil
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}
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func (m *SimplePriceMatching) PlaceOrder(o types.SubmitOrder) (closedOrders *types.Order, trades *types.Trade, err error) {
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// start from one
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orderID := incOrderID()
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// price for checking account balance
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price := o.Price
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switch o.Type {
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case types.OrderTypeMarket:
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price = m.LastPrice.Float64()
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case types.OrderTypeLimit:
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price = o.Price
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}
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switch o.Side {
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case types.SideTypeBuy:
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quote := price * o.Quantity
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quoteBalance, ok := m.Account.Balance(m.Market.QuoteCurrency)
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if !ok || quote > quoteBalance.Available {
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return nil, nil, errors.Errorf("insufficient available quote balance")
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}
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case types.SideTypeSell:
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baseQuantity := o.Quantity
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baseBalance, ok := m.Account.Balance(m.Market.BaseCurrency)
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if !ok || baseQuantity > baseBalance.Available {
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return nil, nil, errors.Errorf("insufficient available base balance")
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}
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}
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if o.Type == types.OrderTypeMarket {
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order := newOrder(o, orderID, m.CurrentTime)
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order.Status = types.OrderStatusFilled
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order.ExecutedQuantity = order.Quantity
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order.Price = price
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trade := m.newTradeFromOrder(order, false)
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return &order, &trade, nil
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}
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order := newOrder(o, orderID, m.CurrentTime)
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switch o.Side {
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case types.SideTypeBuy:
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m.mu.Lock()
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m.bidOrders = append(m.bidOrders, order)
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m.mu.Unlock()
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case types.SideTypeSell:
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m.mu.Lock()
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m.askOrders = append(m.askOrders, order)
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m.mu.Unlock()
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}
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return &order, nil, nil
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}
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func (m *SimplePriceMatching) newTradeFromOrder(order types.Order, isMaker bool) types.Trade {
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// BINANCE uses 0.1% for both maker and taker
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// MAX uses 0.050% for maker and 0.15% for taker
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var commission = DefaultFeeRate
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if isMaker && m.Account.MakerCommission > 0 {
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commission = 0.0001 * float64(m.Account.MakerCommission) // binance uses 10~15
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} else if m.Account.TakerCommission > 0 {
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commission = 0.0001 * float64(m.Account.TakerCommission) // binance uses 10~15
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}
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var fee float64
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var feeCurrency string
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switch order.Side {
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case types.SideTypeBuy:
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fee = order.Quantity * commission
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feeCurrency = m.Market.BaseCurrency
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case types.SideTypeSell:
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fee = order.Quantity * order.Price * commission
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feeCurrency = m.Market.QuoteCurrency
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}
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var id = incTradeID()
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return types.Trade{
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ID: int64(id),
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OrderID: order.OrderID,
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Exchange: "backtest",
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Price: order.Price,
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Quantity: order.Quantity,
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QuoteQuantity: order.Quantity * order.Price,
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Symbol: order.Symbol,
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Side: order.Side,
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IsBuyer: order.Side == types.SideTypeBuy,
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IsMaker: isMaker,
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Time: m.CurrentTime,
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Fee: fee,
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FeeCurrency: feeCurrency,
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}
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}
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func (m *SimplePriceMatching) BuyToPrice(price fixedpoint.Value) (closedOrders []types.Order, trades []types.Trade) {
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var priceF = price.Float64()
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var askOrders []types.Order
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for _, o := range m.askOrders {
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switch o.Type {
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case types.OrderTypeStopMarket:
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// should we trigger the order
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if priceF >= o.StopPrice {
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o.ExecutedQuantity = o.Quantity
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o.Price = priceF
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o.Status = types.OrderStatusFilled
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closedOrders = append(closedOrders, o)
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trade := m.newTradeFromOrder(o, false)
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trades = append(trades, trade)
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} else {
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askOrders = append(askOrders, o)
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}
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case types.OrderTypeStopLimit:
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// should we trigger the order
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if priceF >= o.StopPrice {
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o.Type = types.OrderTypeLimit
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if priceF >= o.Price {
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o.ExecutedQuantity = o.Quantity
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o.Status = types.OrderStatusFilled
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closedOrders = append(closedOrders, o)
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trade := m.newTradeFromOrder(o, false)
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trades = append(trades, trade)
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} else {
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askOrders = append(askOrders, o)
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}
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} else {
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askOrders = append(askOrders, o)
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}
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case types.OrderTypeLimit:
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if priceF >= o.Price {
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o.ExecutedQuantity = o.Quantity
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o.Status = types.OrderStatusFilled
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closedOrders = append(closedOrders, o)
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trade := m.newTradeFromOrder(o, true)
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trades = append(trades, trade)
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} else {
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askOrders = append(askOrders, o)
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}
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default:
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askOrders = append(askOrders, o)
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}
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}
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m.askOrders = askOrders
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m.LastPrice = price
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return closedOrders, trades
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}
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func (m *SimplePriceMatching) SellToPrice(price fixedpoint.Value) (closedOrders []types.Order, trades []types.Trade) {
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var sellPrice = price.Float64()
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var bidOrders []types.Order
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for _, o := range m.bidOrders {
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switch o.Type {
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case types.OrderTypeStopMarket:
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// should we trigger the order
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if sellPrice <= o.StopPrice {
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o.ExecutedQuantity = o.Quantity
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o.Price = sellPrice
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o.Status = types.OrderStatusFilled
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closedOrders = append(closedOrders, o)
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trade := m.newTradeFromOrder(o, false)
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trades = append(trades, trade)
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} else {
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bidOrders = append(bidOrders, o)
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}
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case types.OrderTypeStopLimit:
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// should we trigger the order
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if sellPrice <= o.StopPrice {
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o.Type = types.OrderTypeLimit
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if sellPrice <= o.Price {
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o.ExecutedQuantity = o.Quantity
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o.Status = types.OrderStatusFilled
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closedOrders = append(closedOrders, o)
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trade := m.newTradeFromOrder(o, false)
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trades = append(trades, trade)
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} else {
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bidOrders = append(bidOrders, o)
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}
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} else {
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bidOrders = append(bidOrders, o)
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}
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case types.OrderTypeLimit:
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if sellPrice <= o.Price {
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o.ExecutedQuantity = o.Quantity
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o.Status = types.OrderStatusFilled
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closedOrders = append(closedOrders, o)
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trade := m.newTradeFromOrder(o, true)
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trades = append(trades, trade)
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} else {
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bidOrders = append(bidOrders, o)
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}
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default:
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bidOrders = append(bidOrders, o)
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}
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}
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m.bidOrders = bidOrders
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m.LastPrice = price
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return closedOrders, trades
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}
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func emitTxn(stream *Stream, trades []types.Trade, orders []types.Order) {
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for _, t := range trades {
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stream.EmitTradeUpdate(t)
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}
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for _, o := range orders {
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stream.EmitOrderUpdate(o)
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}
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}
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func (m *SimplePriceMatching) processKLine(stream *Stream, kline types.KLine) {
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m.CurrentTime = kline.EndTime
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switch kline.GetTrend() {
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case types.TrendDown:
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if kline.High > kline.Open {
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orders, trades := m.BuyToPrice(fixedpoint.NewFromFloat(kline.High))
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emitTxn(stream, trades, orders)
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}
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if kline.Low > kline.Close {
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orders, trades := m.SellToPrice(fixedpoint.NewFromFloat(kline.Low))
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emitTxn(stream, trades, orders)
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}
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orders, trades := m.SellToPrice(fixedpoint.NewFromFloat(kline.Close))
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emitTxn(stream, trades, orders)
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case types.TrendUp:
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if kline.Low < kline.Open {
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orders, trades := m.SellToPrice(fixedpoint.NewFromFloat(kline.Low))
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emitTxn(stream, trades, orders)
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}
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if kline.High > kline.Close {
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orders, trades := m.BuyToPrice(fixedpoint.NewFromFloat(kline.High))
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emitTxn(stream, trades, orders)
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}
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orders, trades := m.BuyToPrice(fixedpoint.NewFromFloat(kline.Close))
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emitTxn(stream, trades, orders)
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}
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}
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type Matching struct {
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Symbol string
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Asks PriceOrderSlice
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Bids PriceOrderSlice
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OrderID uint64
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CurrentTime time.Time
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}
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func (m *Matching) PlaceOrder(o types.SubmitOrder) {
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var order = types.Order{
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SubmitOrder: o,
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Exchange: "backtest",
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OrderID: m.OrderID,
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Status: types.OrderStatusNew,
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ExecutedQuantity: 0,
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IsWorking: false,
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CreationTime: m.CurrentTime,
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UpdateTime: m.CurrentTime,
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}
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_ = order
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}
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func newOrder(o types.SubmitOrder, orderID uint64, creationTime time.Time) types.Order {
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return types.Order{
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OrderID: orderID,
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SubmitOrder: o,
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Exchange: "backtest",
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Status: types.OrderStatusNew,
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ExecutedQuantity: 0,
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IsWorking: false,
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CreationTime: creationTime,
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UpdateTime: creationTime,
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}
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}
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