bbgo_origin/pkg/strategy/grid/strategy.go

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package grid
import (
"context"
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"fmt"
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"sync"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
"github.com/c9s/bbgo/pkg/bbgo"
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"github.com/c9s/bbgo/pkg/exchange/max"
"github.com/c9s/bbgo/pkg/fixedpoint"
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"github.com/c9s/bbgo/pkg/service"
"github.com/c9s/bbgo/pkg/types"
)
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const ID = "grid"
var log = logrus.WithField("strategy", ID)
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func init() {
// Register the pointer of the strategy struct,
// so that bbgo knows what struct to be used to unmarshal the configs (YAML or JSON)
// Note: built-in strategies need to imported manually in the bbgo cmd package.
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bbgo.RegisterStrategy(ID, &Strategy{})
}
// State is the grid snapshot
type State struct {
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Orders []types.SubmitOrder `json:"orders,omitempty"`
FilledBuyGrids map[fixedpoint.Value]struct{} `json:"filledBuyGrids"`
FilledSellGrids map[fixedpoint.Value]struct{} `json:"filledSellGrids"`
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Position *bbgo.Position `json:"position,omitempty"`
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AccumulativeArbitrageProfit fixedpoint.Value `json:"accumulativeArbitrageProfit"`
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// any created orders for tracking trades
// [source Order ID] -> arbitrage order
ArbitrageOrders map[uint64]types.Order `json:"arbitrageOrders"`
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}
type Strategy struct {
// The notification system will be injected into the strategy automatically.
// This field will be injected automatically since it's a single exchange strategy.
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*bbgo.Notifiability `json:"-" yaml:"-"`
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*bbgo.Graceful `json:"-" yaml:"-"`
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*bbgo.Persistence
// OrderExecutor is an interface for submitting order.
// This field will be injected automatically since it's a single exchange strategy.
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bbgo.OrderExecutor `json:"-" yaml:"-"`
// Market stores the configuration of the market, for example, VolumePrecision, PricePrecision, MinLotSize... etc
// This field will be injected automatically since we defined the Symbol field.
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types.Market `json:"-" yaml:"-"`
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TradeService *service.TradeService `json:"-" yaml:"-"`
// These fields will be filled from the config file (it translates YAML to JSON)
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Symbol string `json:"symbol" yaml:"symbol"`
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// ProfitSpread is the fixed profit spread you want to submit the sell order
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ProfitSpread fixedpoint.Value `json:"profitSpread" yaml:"profitSpread"`
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// GridNum is the grid number, how many orders you want to post on the orderbook.
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GridNum int `json:"gridNumber" yaml:"gridNumber"`
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UpperPrice fixedpoint.Value `json:"upperPrice" yaml:"upperPrice"`
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LowerPrice fixedpoint.Value `json:"lowerPrice" yaml:"lowerPrice"`
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// Quantity is the quantity you want to submit for each order.
Quantity fixedpoint.Value `json:"quantity,omitempty"`
// ScaleQuantity helps user to define the quantity by price scale or volume scale
ScaleQuantity *bbgo.PriceVolumeScale `json:"scaleQuantity,omitempty"`
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// FixedAmount is used for fixed amount (dynamic quantity) if you don't want to use fixed quantity.
FixedAmount fixedpoint.Value `json:"amount,omitempty" yaml:"amount"`
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// Side is the initial maker orders side. defaults to "both"
Side types.SideType `json:"side" yaml:"side"`
// CatchUp let the maker grid catch up with the price change.
CatchUp bool `json:"catchUp" yaml:"catchUp"`
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// Long means you want to hold more base asset than the quote asset.
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Long bool `json:"long,omitempty" yaml:"long,omitempty"`
state *State
// orderStore is used to store all the created orders, so that we can filter the trades.
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orderStore *bbgo.OrderStore
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// activeOrders is the locally maintained active order book of the maker orders.
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activeOrders *bbgo.LocalActiveOrderBook
// groupID is the group ID used for the strategy instance for canceling orders
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groupID uint32
}
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func (s *Strategy) ID() string {
return ID
}
func (s *Strategy) generateGridSellOrders(session *bbgo.ExchangeSession) ([]types.SubmitOrder, error) {
currentPriceFloat, ok := session.LastPrice(s.Symbol)
if !ok {
return nil, fmt.Errorf("%s last price not found, skipping", s.Symbol)
}
currentPrice := fixedpoint.NewFromFloat(currentPriceFloat)
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if currentPrice > s.UpperPrice {
return nil, fmt.Errorf("current price %f is higher than upper price %f", currentPrice.Float64(), s.UpperPrice.Float64())
}
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priceRange := s.UpperPrice - s.LowerPrice
numGrids := fixedpoint.NewFromInt(s.GridNum)
gridSpread := priceRange.Div(numGrids)
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// find the nearest grid price from the current price
startPrice := fixedpoint.Max(
s.LowerPrice,
s.UpperPrice-(s.UpperPrice-currentPrice).Div(gridSpread).Floor().Mul(gridSpread))
if startPrice > s.UpperPrice {
return nil, fmt.Errorf("current price %f exceeded the upper price boundary %f",
currentPrice.Float64(),
s.UpperPrice.Float64())
}
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balances := session.Account.Balances()
baseBalance, ok := balances[s.Market.BaseCurrency]
if !ok {
return nil, fmt.Errorf("base balance %s not found", s.Market.BaseCurrency)
}
if baseBalance.Available == 0 {
return nil, fmt.Errorf("base balance %s is zero: %+v", s.Market.BaseCurrency, baseBalance)
}
log.Infof("placing grid sell orders from %f ~ %f, grid spread %f",
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startPrice.Float64(),
s.UpperPrice.Float64(),
gridSpread.Float64())
var orders []types.SubmitOrder
for price := startPrice; price <= s.UpperPrice; price += gridSpread {
var quantity fixedpoint.Value
if s.Quantity > 0 {
quantity = s.Quantity
} else if s.ScaleQuantity != nil {
qf, err := s.ScaleQuantity.Scale(price.Float64(), 0)
if err != nil {
return nil, err
}
quantity = fixedpoint.NewFromFloat(qf)
} else if s.FixedAmount > 0 {
quantity = s.FixedAmount.Div(price)
}
// quoteQuantity := price.Mul(quantity)
if baseBalance.Available < quantity {
return orders, fmt.Errorf("base balance %s %f is not enough, stop generating sell orders",
baseBalance.Currency,
baseBalance.Available.Float64())
}
if _, filled := s.state.FilledSellGrids[price]; filled {
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log.Debugf("sell grid at price %f is already filled, skipping", price.Float64())
continue
}
orders = append(orders, types.SubmitOrder{
Symbol: s.Symbol,
Side: types.SideTypeSell,
Type: types.OrderTypeLimit,
Market: s.Market,
Quantity: quantity.Float64(),
Price: price.Float64(),
TimeInForce: "GTC",
GroupID: s.groupID,
})
baseBalance.Available -= quantity
s.state.FilledSellGrids[price] = struct{}{}
}
return orders, nil
}
func (s *Strategy) generateGridBuyOrders(session *bbgo.ExchangeSession) ([]types.SubmitOrder, error) {
// session.Exchange.QueryTicker()
currentPriceFloat, ok := session.LastPrice(s.Symbol)
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if !ok {
return nil, fmt.Errorf("%s last price not found, skipping", s.Symbol)
}
currentPrice := fixedpoint.NewFromFloat(currentPriceFloat)
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if currentPrice < s.LowerPrice {
return nil, fmt.Errorf("current price %f is lower than the lower price %f", currentPrice.Float64(), s.LowerPrice.Float64())
}
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priceRange := s.UpperPrice - s.LowerPrice
numGrids := fixedpoint.NewFromInt(s.GridNum)
gridSpread := priceRange.Div(numGrids)
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// Find the nearest grid price for placing buy orders:
// buyRange = currentPrice - lowerPrice
// numOfBuyGrids = Floor(buyRange / gridSpread)
// startPrice = lowerPrice + numOfBuyGrids * gridSpread
// priceOfBuyOrder1 = startPrice
// priceOfBuyOrder2 = startPrice - gridSpread
// priceOfBuyOrder3 = startPrice - gridSpread * 2
startPrice := fixedpoint.Min(
s.UpperPrice,
s.LowerPrice+(currentPrice-s.LowerPrice).Div(gridSpread).Floor().Mul(gridSpread))
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if startPrice < s.LowerPrice {
return nil, fmt.Errorf("current price %f exceeded the lower price boundary %f",
currentPrice.Float64(),
s.UpperPrice.Float64())
}
balances := session.Account.Balances()
balance, ok := balances[s.Market.QuoteCurrency]
if !ok {
return nil, fmt.Errorf("quote balance %s not found", s.Market.QuoteCurrency)
}
if balance.Available == 0 {
return nil, fmt.Errorf("quote balance %s is zero: %+v", s.Market.QuoteCurrency, balance)
}
log.Infof("placing grid buy orders from %f to %f, grid spread %f",
startPrice.Float64(),
s.LowerPrice.Float64(),
gridSpread.Float64())
var orders []types.SubmitOrder
for price := startPrice; s.LowerPrice <= price; price -= gridSpread {
var quantity fixedpoint.Value
if s.Quantity > 0 {
quantity = s.Quantity
} else if s.ScaleQuantity != nil {
qf, err := s.ScaleQuantity.Scale(price.Float64(), 0)
if err != nil {
return nil, err
}
quantity = fixedpoint.NewFromFloat(qf)
} else if s.FixedAmount > 0 {
quantity = s.FixedAmount.Div(price)
}
quoteQuantity := price.Mul(quantity)
if balance.Available < quoteQuantity {
return orders, fmt.Errorf("quote balance %s %f is not enough for %f, stop generating buy orders",
balance.Currency,
balance.Available.Float64(),
quoteQuantity.Float64())
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}
if _, filled := s.state.FilledBuyGrids[price]; filled {
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log.Debugf("buy grid at price %f is already filled, skipping", price.Float64())
continue
}
orders = append(orders, types.SubmitOrder{
Symbol: s.Symbol,
Side: types.SideTypeBuy,
Type: types.OrderTypeLimit,
Market: s.Market,
Quantity: quantity.Float64(),
Price: price.Float64(),
TimeInForce: "GTC",
GroupID: s.groupID,
})
balance.Available -= quoteQuantity
s.state.FilledBuyGrids[price] = struct{}{}
}
return orders, nil
}
func (s *Strategy) placeGridSellOrders(orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) error {
orderForms, err := s.generateGridSellOrders(session)
if err != nil {
return err
}
if len(orderForms) > 0 {
createdOrders, err := orderExecutor.SubmitOrders(context.Background(), orderForms...)
if err != nil {
return err
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}
s.activeOrders.Add(createdOrders...)
}
return nil
}
func (s *Strategy) placeGridBuyOrders(orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) error {
orderForms, err := s.generateGridBuyOrders(session)
if err != nil {
return err
}
if len(orderForms) > 0 {
createdOrders, err := orderExecutor.SubmitOrders(context.Background(), orderForms...)
if err != nil {
return err
} else {
s.activeOrders.Add(createdOrders...)
}
}
return nil
}
func (s *Strategy) placeGridOrders(orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) {
log.Infof("placing grid orders on side %s...", s.Side)
switch s.Side {
case types.SideTypeBuy:
if err := s.placeGridBuyOrders(orderExecutor, session); err != nil {
log.Warn(err.Error())
}
case types.SideTypeSell:
if err := s.placeGridSellOrders(orderExecutor, session); err != nil {
log.Warn(err.Error())
}
case types.SideTypeBoth:
if err := s.placeGridSellOrders(orderExecutor, session); err != nil {
log.Warn(err.Error())
}
if err := s.placeGridBuyOrders(orderExecutor, session); err != nil {
log.Warn(err.Error())
}
}
}
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func (s *Strategy) tradeUpdateHandler(trade types.Trade) {
if trade.Symbol != s.Symbol {
return
}
if s.orderStore.Exists(trade.OrderID) {
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log.Infof("received trade update of order %d: %+v", trade.OrderID, trade)
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if s.TradeService != nil {
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if err := s.TradeService.Mark(context.Background(), trade.ID, ID); err != nil {
log.WithError(err).Error("trade mark error")
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}
}
if trade.Side == types.SideTypeSelf {
return
}
profit, madeProfit := s.state.Position.AddTrade(trade)
if madeProfit {
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s.Notify("average cost profit: %f", profit.Float64())
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}
}
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}
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func (s *Strategy) handleFilledOrder(filledOrder types.Order) {
// generate arbitrage order
var side = filledOrder.Side.Reverse()
var price = filledOrder.Price
var quantity = filledOrder.Quantity
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switch side {
case types.SideTypeSell:
price += s.ProfitSpread.Float64()
case types.SideTypeBuy:
price -= s.ProfitSpread.Float64()
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}
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if s.FixedAmount > 0 {
quantity = s.FixedAmount.Float64() / price
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} else if s.Long {
// long = use the same amount to buy more quantity back
// the original amount
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var amount = filledOrder.Price * filledOrder.Quantity
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quantity = amount / price
}
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submitOrder := types.SubmitOrder{
Symbol: s.Symbol,
Side: side,
Type: types.OrderTypeLimit,
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Quantity: quantity,
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Price: price,
TimeInForce: "GTC",
GroupID: s.groupID,
}
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log.Infof("submitting arbitrage order: %s against filled order %s", submitOrder.String(), filledOrder.String())
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createdOrders, err := s.OrderExecutor.SubmitOrders(context.Background(), submitOrder)
if err != nil {
log.WithError(err).Errorf("can not place orders")
return
}
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// create one-way link from the newly created orders
for _, o := range createdOrders {
s.state.ArbitrageOrders[o.OrderID] = filledOrder
}
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s.orderStore.Add(createdOrders...)
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s.activeOrders.Add(createdOrders...)
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// calculate arbitrage profit
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// TODO: apply fee rate here
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if s.Long {
switch filledOrder.Side {
case types.SideTypeSell:
if buyOrder, ok := s.state.ArbitrageOrders[filledOrder.OrderID]; ok {
// use base asset quantity here
baseProfit := buyOrder.Quantity - filledOrder.Quantity
s.state.AccumulativeArbitrageProfit += fixedpoint.NewFromFloat(baseProfit)
s.Notify("%s grid arbitrage profit %f %s, accumulative arbitrage profit %f %s", s.Symbol,
baseProfit, s.Market.BaseCurrency,
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s.state.AccumulativeArbitrageProfit.Float64(), s.Market.BaseCurrency,
)
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}
case types.SideTypeBuy:
if sellOrder, ok := s.state.ArbitrageOrders[filledOrder.OrderID]; ok {
// use base asset quantity here
baseProfit := filledOrder.Quantity - sellOrder.Quantity
s.state.AccumulativeArbitrageProfit += fixedpoint.NewFromFloat(baseProfit)
s.Notify("%s grid arbitrage profit %f %s, accumulative arbitrage profit %f %s", s.Symbol,
baseProfit, s.Market.BaseCurrency,
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s.state.AccumulativeArbitrageProfit.Float64(), s.Market.BaseCurrency,
)
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}
}
} else if !s.Long && s.Quantity > 0 {
switch filledOrder.Side {
case types.SideTypeSell:
if buyOrder, ok := s.state.ArbitrageOrders[filledOrder.OrderID]; ok {
// use base asset quantity here
quoteProfit := (filledOrder.Quantity * filledOrder.Price) - (buyOrder.Quantity * buyOrder.Price)
s.state.AccumulativeArbitrageProfit += fixedpoint.NewFromFloat(quoteProfit)
s.Notify("%s grid arbitrage profit %f %s, accumulative arbitrage profit %f %s", s.Symbol,
quoteProfit, s.Market.QuoteCurrency,
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s.state.AccumulativeArbitrageProfit.Float64(), s.Market.QuoteCurrency,
)
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}
case types.SideTypeBuy:
if sellOrder, ok := s.state.ArbitrageOrders[filledOrder.OrderID]; ok {
// use base asset quantity here
quoteProfit := (sellOrder.Quantity * sellOrder.Price) - (filledOrder.Quantity * filledOrder.Price)
s.state.AccumulativeArbitrageProfit += fixedpoint.NewFromFloat(quoteProfit)
s.Notify("%s grid arbitrage profit %f %s, accumulative arbitrage profit %f %s", s.Symbol,
quoteProfit, s.Market.QuoteCurrency,
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s.state.AccumulativeArbitrageProfit.Float64(), s.Market.QuoteCurrency,
)
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}
}
}
}
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func (s *Strategy) Subscribe(session *bbgo.ExchangeSession) {
session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: "1m"})
}
func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) error {
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// do some basic validation
if s.GridNum == 0 {
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s.GridNum = 10
}
if s.Side == "" {
s.Side = types.SideTypeBoth
}
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if s.UpperPrice == 0 {
return errors.New("upperPrice can not be zero, you forgot to set?")
}
if s.LowerPrice == 0 {
return errors.New("lowerPrice can not be zero, you forgot to set?")
}
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if s.UpperPrice <= s.LowerPrice {
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return fmt.Errorf("upperPrice (%f) should not be less than or equal to lowerPrice (%f)", s.UpperPrice.Float64(), s.LowerPrice.Float64())
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}
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instanceID := fmt.Sprintf("grid-%s-%d-%d-%d", s.Symbol, s.GridNum, s.UpperPrice, s.LowerPrice)
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s.groupID = max.GenerateGroupID(instanceID)
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log.Infof("using group id %d from fnv(%s)", s.groupID, instanceID)
var stateLoaded = false
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if s.Persistence != nil {
var state State
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if err := s.Persistence.Load(&state, ID, instanceID); err != nil {
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if err != service.ErrPersistenceNotExists {
return errors.Wrapf(err, "state load error")
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}
} else {
log.Infof("grid state loaded")
stateLoaded = true
s.state = &state
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}
}
if s.state == nil {
position, ok := session.Position(s.Symbol)
if !ok {
return fmt.Errorf("position not found")
}
s.state = &State{
FilledBuyGrids: make(map[fixedpoint.Value]struct{}),
FilledSellGrids: make(map[fixedpoint.Value]struct{}),
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ArbitrageOrders: make(map[uint64]types.Order),
Position: position,
}
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}
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if s.state.ArbitrageOrders == nil {
s.state.ArbitrageOrders = make(map[uint64]types.Order)
}
s.Notify("current position %+v", s.state.Position)
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s.orderStore = bbgo.NewOrderStore(s.Symbol)
s.orderStore.BindStream(session.Stream)
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// we don't persist orders so that we can not clear the previous orders for now. just need time to support this.
s.activeOrders = bbgo.NewLocalActiveOrderBook()
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s.activeOrders.OnFilled(s.handleFilledOrder)
s.activeOrders.BindStream(session.Stream)
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s.Graceful.OnShutdown(func(ctx context.Context, wg *sync.WaitGroup) {
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defer wg.Done()
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if s.Persistence != nil {
log.Infof("backing up grid state...")
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submitOrders := s.activeOrders.Backup()
s.state.Orders = submitOrders
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if err := s.Persistence.Save(s.state, ID, instanceID); err != nil {
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log.WithError(err).Error("can not save active order backups")
} else {
log.Infof("active order snapshot saved")
}
}
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log.Infof("canceling active orders...")
if err := session.Exchange.CancelOrders(ctx, s.activeOrders.Orders()...); err != nil {
log.WithError(err).Errorf("cancel order error")
}
})
if s.CatchUp {
session.Stream.OnKLineClosed(func(kline types.KLine) {
log.Infof("catchUp mode is enabled, updating grid orders...")
// update grid
s.placeGridOrders(orderExecutor, session)
})
}
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session.Stream.OnTradeUpdate(s.tradeUpdateHandler)
session.Stream.OnStart(func() {
if stateLoaded && len(s.state.Orders) > 0 {
createdOrders, err := orderExecutor.SubmitOrders(ctx, s.state.Orders...)
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if err != nil {
log.WithError(err).Error("active orders restore error")
}
s.activeOrders.Add(createdOrders...)
s.orderStore.Add(createdOrders...)
} else {
s.placeGridOrders(orderExecutor, session)
}
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})
return nil
}