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strategy.go
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strategy.go
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package xnav
import (
"context"
"fmt"
"sync"
"time"
"github.com/puper/bbgo/pkg/bbgo"
"github.com/puper/bbgo/pkg/fixedpoint"
"github.com/puper/bbgo/pkg/types"
"github.com/puper/bbgo/pkg/util"
"github.com/puper/bbgo/pkg/util/templateutil"
"github.com/robfig/cron/v3"
"github.com/sirupsen/logrus"
"github.com/slack-go/slack"
)
const ID = "xnav"
var log = logrus.WithField("strategy", ID)
func init() {
bbgo.RegisterStrategy(ID, &Strategy{})
}
type State struct {
Since int64 `json:"since"`
}
func (s *State) IsOver24Hours() bool {
return types.Over24Hours(time.Unix(s.Since, 0))
}
func (s *State) PlainText() string {
return templateutil.Render(`{{ .Asset }} transfer stats:
daily number of transfers: {{ .DailyNumberOfTransfers }}
daily amount of transfers {{ .DailyAmountOfTransfers.Float64 }}`, s)
}
func (s *State) SlackAttachment() slack.Attachment {
return slack.Attachment{
// Pretext: "",
// Text: text,
Fields: []slack.AttachmentField{},
Footer: templateutil.Render("Since {{ . }}", time.Unix(s.Since, 0).Format(time.RFC822)),
}
}
func (s *State) Reset() {
var beginningOfTheDay = types.BeginningOfTheDay(time.Now().Local())
*s = State{
Since: beginningOfTheDay.Unix(),
}
}
type Strategy struct {
*bbgo.Environment
Interval types.Interval `json:"interval"`
Schedule string `json:"schedule"`
ReportOnStart bool `json:"reportOnStart"`
IgnoreDusts bool `json:"ignoreDusts"`
State *State `persistence:"state"`
cron *cron.Cron
}
func (s *Strategy) ID() string {
return ID
}
func (s *Strategy) Initialize() error {
return nil
}
func (s *Strategy) Validate() error {
if s.Interval == "" && s.Schedule == "" {
return fmt.Errorf("interval or schedule is required")
}
return nil
}
var Ten = fixedpoint.NewFromInt(10)
func (s *Strategy) CrossSubscribe(sessions map[string]*bbgo.ExchangeSession) {}
func (s *Strategy) recordNetAssetValue(ctx context.Context, sessions map[string]*bbgo.ExchangeSession) {
totalBalances := types.BalanceMap{}
allPrices := map[string]fixedpoint.Value{}
sessionBalances := map[string]types.BalanceMap{}
priceTime := time.Now()
// iterate the sessions and record them
quoteCurrency := "USDT"
for sessionName, session := range sessions {
if session.PublicOnly {
log.Infof("session %s is public only, skip", sessionName)
continue
}
// update the account balances and the margin information
if _, err := session.UpdateAccount(ctx); err != nil {
log.WithError(err).Errorf("can not update account")
return
}
account := session.GetAccount()
balances := account.Balances()
if err := session.UpdatePrices(ctx, balances.Currencies(), quoteCurrency); err != nil {
log.WithError(err).Error("price update failed")
return
}
sessionBalances[sessionName] = balances
totalBalances = totalBalances.Add(balances)
prices := session.LastPrices()
assets := balances.Assets(prices, priceTime)
// merge prices
for m, p := range prices {
allPrices[m] = p
}
s.Environment.RecordAsset(priceTime, session, assets)
}
displayAssets := types.AssetMap{}
totalAssets := totalBalances.Assets(allPrices, priceTime)
s.Environment.RecordAsset(priceTime, &bbgo.ExchangeSession{Name: "ALL"}, totalAssets)
for currency, asset := range totalAssets {
// calculated if it's dust only when InUSD (usd value) is defined.
if s.IgnoreDusts && !asset.InUSD.IsZero() && asset.InUSD.Compare(Ten) < 0 && asset.InUSD.Compare(Ten.Neg()) > 0 {
continue
}
displayAssets[currency] = asset
}
bbgo.Notify(displayAssets)
if s.State != nil {
if s.State.IsOver24Hours() {
s.State.Reset()
}
bbgo.Sync(ctx, s)
}
}
func (s *Strategy) CrossRun(ctx context.Context, _ bbgo.OrderExecutionRouter, sessions map[string]*bbgo.ExchangeSession) error {
if s.State == nil {
s.State = &State{}
s.State.Reset()
}
bbgo.OnShutdown(ctx, func(ctx context.Context, wg *sync.WaitGroup) {
defer wg.Done()
bbgo.Sync(ctx, s)
})
if s.ReportOnStart {
s.recordNetAssetValue(ctx, sessions)
}
if s.Environment.BacktestService != nil {
log.Warnf("xnav does not support backtesting")
}
if s.Interval != "" {
go func() {
ticker := time.NewTicker(util.MillisecondsJitter(s.Interval.Duration(), 1000))
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
s.recordNetAssetValue(ctx, sessions)
}
}
}()
} else if s.Schedule != "" {
s.cron = cron.New()
_, err := s.cron.AddFunc(s.Schedule, func() {
s.recordNetAssetValue(ctx, sessions)
})
if err != nil {
return err
}
s.cron.Start()
}
return nil
}