mirror of
https://github.com/c9s/bbgo.git
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389 lines
9.6 KiB
Go
389 lines
9.6 KiB
Go
package autoborrow
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import (
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"context"
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"fmt"
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"time"
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"github.com/sirupsen/logrus"
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"github.com/slack-go/slack"
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"github.com/c9s/bbgo/pkg/bbgo"
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"github.com/c9s/bbgo/pkg/exchange/binance"
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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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const ID = "autoborrow"
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var log = logrus.WithField("strategy", ID)
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func init() {
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bbgo.RegisterStrategy(ID, &Strategy{})
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}
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/**
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- on: binance
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autoborrow:
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interval: 30m
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repayWhenDeposit: true
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# minMarginLevel for triggering auto borrow
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minMarginLevel: 1.5
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assets:
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- asset: ETH
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low: 3.0
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maxQuantityPerBorrow: 1.0
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maxTotalBorrow: 10.0
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- asset: USDT
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low: 1000.0
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maxQuantityPerBorrow: 100.0
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maxTotalBorrow: 10.0
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*/
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type MarginAsset struct {
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Asset string `json:"asset"`
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Low fixedpoint.Value `json:"low"`
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MaxTotalBorrow fixedpoint.Value `json:"maxTotalBorrow"`
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MaxQuantityPerBorrow fixedpoint.Value `json:"maxQuantityPerBorrow"`
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MinQuantityPerBorrow fixedpoint.Value `json:"minQuantityPerBorrow"`
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}
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type Strategy struct {
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*bbgo.Notifiability
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Interval types.Interval `json:"interval"`
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MinMarginLevel fixedpoint.Value `json:"minMarginLevel"`
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MaxMarginLevel fixedpoint.Value `json:"maxMarginLevel"`
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AutoRepayWhenDeposit bool `json:"autoRepayWhenDeposit"`
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Assets []MarginAsset `json:"assets"`
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ExchangeSession *bbgo.ExchangeSession
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marginBorrowRepay types.MarginBorrowRepayService
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}
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func (s *Strategy) ID() string {
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return ID
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}
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func (s *Strategy) Subscribe(session *bbgo.ExchangeSession) {
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// session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: "1m"})
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}
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func (s *Strategy) tryToRepayAnyDebt(ctx context.Context) {
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log.Infof("trying to repay any debt...")
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account, err := s.ExchangeSession.UpdateAccount(ctx)
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if err != nil {
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log.WithError(err).Errorf("can not update account")
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return
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}
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minMarginLevel := s.MinMarginLevel
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curMarginLevel := account.MarginLevel
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balances := account.Balances()
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for _, b := range balances {
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if b.Borrowed.Sign() <= 0 {
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continue
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}
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if b.Available.IsZero() {
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continue
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}
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toRepay := b.Available
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s.Notifiability.Notify(&MarginAction{
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Exchange: s.ExchangeSession.ExchangeName,
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Action: "Repay",
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Asset: b.Currency,
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Amount: toRepay,
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MarginLevel: curMarginLevel,
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MinMarginLevel: minMarginLevel,
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})
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log.Infof("repaying %f %s", toRepay.Float64(), b.Currency)
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if err := s.marginBorrowRepay.RepayMarginAsset(context.Background(), b.Currency, toRepay); err != nil {
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log.WithError(err).Errorf("margin repay error")
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}
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}
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}
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func (s *Strategy) checkAndBorrow(ctx context.Context) {
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if s.MinMarginLevel.IsZero() {
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return
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}
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account, err := s.ExchangeSession.UpdateAccount(ctx)
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if err != nil {
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log.WithError(err).Errorf("can not update account")
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return
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}
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minMarginLevel := s.MinMarginLevel
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curMarginLevel := account.MarginLevel
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log.Infof("current account margin level: %s margin ratio: %s, margin tolerance: %s",
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account.MarginLevel.String(),
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account.MarginRatio.String(),
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account.MarginTolerance.String(),
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)
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// if margin ratio is too low, do not borrow
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if curMarginLevel.Compare(minMarginLevel) < 0 {
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log.Infof("current margin level %f < min margin level %f, skip autoborrow", curMarginLevel.Float64(), minMarginLevel.Float64())
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s.tryToRepayAnyDebt(ctx)
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return
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}
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balances := account.Balances()
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if len(balances) == 0 {
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log.Warn("balance is empty, skip autoborrow")
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return
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}
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for _, marginAsset := range s.Assets {
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changed := false
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if marginAsset.Low.IsZero() {
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log.Warnf("margin asset low balance is not set: %+v", marginAsset)
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continue
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}
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b, ok := balances[marginAsset.Asset]
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if ok {
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toBorrow := marginAsset.Low.Sub(b.Total())
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if toBorrow.Sign() < 0 {
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log.Infof("balance %f > low %f. no need to borrow asset %+v",
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b.Total().Float64(),
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marginAsset.Low.Float64(),
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marginAsset)
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continue
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}
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if !marginAsset.MaxQuantityPerBorrow.IsZero() {
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toBorrow = fixedpoint.Min(toBorrow, marginAsset.MaxQuantityPerBorrow)
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}
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if !marginAsset.MaxTotalBorrow.IsZero() {
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// check if we over borrow
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newBorrow := toBorrow.Add(b.Borrowed)
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if newBorrow.Compare(marginAsset.MaxTotalBorrow) > 0 {
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toBorrow = toBorrow.Sub(newBorrow.Sub(marginAsset.MaxTotalBorrow))
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if toBorrow.Sign() < 0 {
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log.Warnf("margin asset %s is over borrowed, skip", marginAsset.Asset)
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continue
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}
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}
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}
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if toBorrow.IsZero() {
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continue
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}
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s.Notifiability.Notify(&MarginAction{
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Exchange: s.ExchangeSession.ExchangeName,
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Action: "Borrow",
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Asset: marginAsset.Asset,
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Amount: toBorrow,
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MarginLevel: curMarginLevel,
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MinMarginLevel: minMarginLevel,
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})
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log.Infof("sending borrow request %f %s", toBorrow.Float64(), marginAsset.Asset)
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if err := s.marginBorrowRepay.BorrowMarginAsset(ctx, marginAsset.Asset, toBorrow); err != nil {
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log.WithError(err).Errorf("borrow error")
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continue
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}
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changed = true
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} else {
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// available balance is less than marginAsset.Low, we should trigger borrow
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toBorrow := marginAsset.Low
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if !marginAsset.MaxQuantityPerBorrow.IsZero() {
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toBorrow = fixedpoint.Min(toBorrow, marginAsset.MaxQuantityPerBorrow)
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}
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if toBorrow.IsZero() {
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continue
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}
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s.Notifiability.Notify(&MarginAction{
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Exchange: s.ExchangeSession.ExchangeName,
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Action: "Borrow",
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Asset: marginAsset.Asset,
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Amount: toBorrow,
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MarginLevel: curMarginLevel,
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MinMarginLevel: minMarginLevel,
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})
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log.Infof("sending borrow request %f %s", toBorrow.Float64(), marginAsset.Asset)
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if err := s.marginBorrowRepay.BorrowMarginAsset(ctx, marginAsset.Asset, toBorrow); err != nil {
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log.WithError(err).Errorf("borrow error")
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continue
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}
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changed = true
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}
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// if debt is changed, we need to update account
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if changed {
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account, err = s.ExchangeSession.UpdateAccount(ctx)
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if err != nil {
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log.WithError(err).Errorf("can not update account")
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return
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}
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}
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}
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}
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func (s *Strategy) run(ctx context.Context, interval time.Duration) {
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ticker := time.NewTicker(interval)
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defer ticker.Stop()
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s.checkAndBorrow(ctx)
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for {
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select {
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case <-ctx.Done():
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return
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case <-ticker.C:
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s.checkAndBorrow(ctx)
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}
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}
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}
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func (s *Strategy) handleBalanceUpdate(balances types.BalanceMap) {
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if s.MinMarginLevel.IsZero() {
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return
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}
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if s.ExchangeSession.GetAccount().MarginLevel.Compare(s.MinMarginLevel) > 0 {
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return
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}
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for _, b := range balances {
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if b.Available.IsZero() && b.Borrowed.IsZero() {
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continue
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}
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}
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}
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func (s *Strategy) handleBinanceBalanceUpdateEvent(event *binance.BalanceUpdateEvent) {
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if s.MinMarginLevel.IsZero() {
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return
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}
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if s.ExchangeSession.GetAccount().MarginLevel.Compare(s.MinMarginLevel) > 0 {
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return
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}
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delta := fixedpoint.MustNewFromString(event.Delta)
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// ignore outflow
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if delta.Sign() < 0 {
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return
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}
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account := s.ExchangeSession.GetAccount()
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minMarginLevel := s.MinMarginLevel
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curMarginLevel := account.MarginLevel
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if b, ok := account.Balance(event.Asset); ok {
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if b.Available.IsZero() || b.Borrowed.IsZero() {
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return
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}
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toRepay := b.Available
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s.Notifiability.Notify(&MarginAction{
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Exchange: s.ExchangeSession.ExchangeName,
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Action: "Repay",
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Asset: b.Currency,
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Amount: toRepay,
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MarginLevel: curMarginLevel,
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MinMarginLevel: minMarginLevel,
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})
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if err := s.marginBorrowRepay.RepayMarginAsset(context.Background(), event.Asset, toRepay); err != nil {
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log.WithError(err).Errorf("margin repay error")
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}
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}
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}
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type MarginAction struct {
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Exchange types.ExchangeName `json:"exchange"`
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Action string `json:"action"`
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Asset string `json:"asset"`
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Amount fixedpoint.Value `json:"amount"`
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MarginLevel fixedpoint.Value `json:"marginLevel"`
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MinMarginLevel fixedpoint.Value `json:"minMarginLevel"`
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}
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func (a *MarginAction) SlackAttachment() slack.Attachment {
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return slack.Attachment{
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Title: fmt.Sprintf("%s %s %s", a.Action, a.Amount, a.Asset),
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Color: "warning",
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Fields: []slack.AttachmentField{
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{
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Title: "Exchange",
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Value: a.Exchange.String(),
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Short: true,
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},
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{
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Title: "Action",
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Value: a.Action,
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Short: true,
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},
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{
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Title: "Asset",
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Value: a.Asset,
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Short: true,
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},
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{
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Title: "Amount",
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Value: a.Amount.String(),
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Short: true,
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},
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{
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Title: "Current Margin Level",
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Value: a.MarginLevel.String(),
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Short: true,
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},
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{
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Title: "Min Margin Level",
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Value: a.MinMarginLevel.String(),
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Short: true,
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},
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},
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}
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}
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// This strategy simply spent all available quote currency to buy the symbol whenever kline gets closed
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func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) error {
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if s.MinMarginLevel.IsZero() {
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log.Warnf("minMarginLevel is 0, you should configure this minimal margin ratio for controlling the liquidation risk")
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}
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s.ExchangeSession = session
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marginBorrowRepay, ok := session.Exchange.(types.MarginBorrowRepayService)
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if !ok {
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return fmt.Errorf("exchange %s does not implement types.MarginBorrowRepayService", session.ExchangeName)
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}
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s.marginBorrowRepay = marginBorrowRepay
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if s.AutoRepayWhenDeposit {
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binanceStream, ok := session.UserDataStream.(*binance.Stream)
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if ok {
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binanceStream.OnBalanceUpdateEvent(s.handleBinanceBalanceUpdateEvent)
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} else {
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session.UserDataStream.OnBalanceUpdate(s.handleBalanceUpdate)
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}
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}
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go s.run(ctx, s.Interval.Duration())
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return nil
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}
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