mirror of
https://github.com/c9s/bbgo.git
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969 lines
29 KiB
Go
969 lines
29 KiB
Go
package bbgo
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import (
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"context"
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"errors"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/slack-go/slack"
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"github.com/prometheus/client_golang/prometheus"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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"github.com/c9s/bbgo/pkg/cache"
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"github.com/c9s/bbgo/pkg/util/templateutil"
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exchange2 "github.com/c9s/bbgo/pkg/exchange"
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"github.com/c9s/bbgo/pkg/fixedpoint"
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"github.com/c9s/bbgo/pkg/service"
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"github.com/c9s/bbgo/pkg/types"
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"github.com/c9s/bbgo/pkg/util"
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)
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var KLinePreloadLimit int64 = 1000
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var ErrEmptyMarketInfo = errors.New("market info should not be empty, 0 markets loaded")
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// ExchangeSession presents the exchange connection Session
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// It also maintains and collects the data returned from the stream.
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type ExchangeSession struct {
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// ---------------------------
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// Session config fields
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// ---------------------------
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// Exchange Session name
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Name string `json:"name,omitempty" yaml:"name,omitempty"`
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ExchangeName types.ExchangeName `json:"exchange" yaml:"exchange"`
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EnvVarPrefix string `json:"envVarPrefix" yaml:"envVarPrefix"`
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Key string `json:"key,omitempty" yaml:"key,omitempty"`
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Secret string `json:"secret,omitempty" yaml:"secret,omitempty"`
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Passphrase string `json:"passphrase,omitempty" yaml:"passphrase,omitempty"`
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SubAccount string `json:"subAccount,omitempty" yaml:"subAccount,omitempty"`
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// Withdrawal is used for enabling withdrawal functions
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Withdrawal bool `json:"withdrawal,omitempty" yaml:"withdrawal,omitempty"`
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MakerFeeRate fixedpoint.Value `json:"makerFeeRate" yaml:"makerFeeRate"`
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TakerFeeRate fixedpoint.Value `json:"takerFeeRate" yaml:"takerFeeRate"`
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ModifyOrderAmountForFee bool `json:"modifyOrderAmountForFee" yaml:"modifyOrderAmountForFee"`
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PublicOnly bool `json:"publicOnly,omitempty" yaml:"publicOnly"`
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Margin bool `json:"margin,omitempty" yaml:"margin"`
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IsolatedMargin bool `json:"isolatedMargin,omitempty" yaml:"isolatedMargin,omitempty"`
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IsolatedMarginSymbol string `json:"isolatedMarginSymbol,omitempty" yaml:"isolatedMarginSymbol,omitempty"`
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Futures bool `json:"futures,omitempty" yaml:"futures"`
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IsolatedFutures bool `json:"isolatedFutures,omitempty" yaml:"isolatedFutures,omitempty"`
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IsolatedFuturesSymbol string `json:"isolatedFuturesSymbol,omitempty" yaml:"isolatedFuturesSymbol,omitempty"`
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// ---------------------------
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// Runtime fields
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// ---------------------------
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// The exchange account states
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Account *types.Account `json:"-" yaml:"-"`
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accountMutex sync.Mutex
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IsInitialized bool `json:"-" yaml:"-"`
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OrderExecutor *ExchangeOrderExecutor `json:"orderExecutor,omitempty" yaml:"orderExecutor,omitempty"`
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// UserDataStream is the connection stream of the exchange
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UserDataStream types.Stream `json:"-" yaml:"-"`
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MarketDataStream types.Stream `json:"-" yaml:"-"`
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// Subscriptions
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// this is a read-only field when running strategy
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Subscriptions map[types.Subscription]types.Subscription `json:"-" yaml:"-"`
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Exchange types.Exchange `json:"-" yaml:"-"`
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UseHeikinAshi bool `json:"heikinAshi,omitempty" yaml:"heikinAshi,omitempty"`
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// Trades collects the executed trades from the exchange
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// map: symbol -> []trade
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Trades map[string]*types.TradeSlice `json:"-" yaml:"-"`
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// markets defines market configuration of a symbol
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markets map[string]types.Market
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// orderBooks stores the streaming order book
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orderBooks map[string]*types.StreamOrderBook
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// startPrices is used for backtest
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startPrices map[string]fixedpoint.Value
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lastPrices map[string]fixedpoint.Value
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lastPriceUpdatedAt time.Time
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// marketDataStores contains the market data store of each market
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marketDataStores map[string]*MarketDataStore
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positions map[string]*types.Position
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// standard indicators of each market
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standardIndicatorSets map[string]*StandardIndicatorSet
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// indicators is the v2 api indicators
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indicators map[string]*IndicatorSet
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orderStores map[string]*OrderStore
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usedSymbols map[string]struct{}
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initializedSymbols map[string]struct{}
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logger *log.Entry
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}
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func NewExchangeSession(name string, exchange types.Exchange) *ExchangeSession {
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userDataStream := exchange.NewStream()
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marketDataStream := exchange.NewStream()
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marketDataStream.SetPublicOnly()
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session := &ExchangeSession{
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Name: name,
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Exchange: exchange,
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UserDataStream: userDataStream,
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MarketDataStream: marketDataStream,
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Subscriptions: make(map[types.Subscription]types.Subscription),
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Account: &types.Account{},
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Trades: make(map[string]*types.TradeSlice),
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orderBooks: make(map[string]*types.StreamOrderBook),
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markets: make(map[string]types.Market),
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startPrices: make(map[string]fixedpoint.Value),
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lastPrices: make(map[string]fixedpoint.Value),
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positions: make(map[string]*types.Position),
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marketDataStores: make(map[string]*MarketDataStore),
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standardIndicatorSets: make(map[string]*StandardIndicatorSet),
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indicators: make(map[string]*IndicatorSet),
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orderStores: make(map[string]*OrderStore),
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usedSymbols: make(map[string]struct{}),
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initializedSymbols: make(map[string]struct{}),
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logger: log.WithField("session", name),
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}
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session.OrderExecutor = &ExchangeOrderExecutor{
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// copy the notification system so that we can route
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Session: session,
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}
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return session
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}
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func (session *ExchangeSession) GetAccount() (a *types.Account) {
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session.accountMutex.Lock()
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a = session.Account
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session.accountMutex.Unlock()
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return a
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}
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// UpdateAccount locks the account mutex and update the account object
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func (session *ExchangeSession) UpdateAccount(ctx context.Context) (*types.Account, error) {
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account, err := session.Exchange.QueryAccount(ctx)
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if err != nil {
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return nil, err
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}
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session.accountMutex.Lock()
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session.Account = account
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session.accountMutex.Unlock()
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return account, nil
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}
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// Init initializes the basic data structure and market information by its exchange.
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// Note that the subscribed symbols are not loaded in this stage.
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func (session *ExchangeSession) Init(ctx context.Context, environ *Environment) error {
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if session.IsInitialized {
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return ErrSessionAlreadyInitialized
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}
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var log = log.WithField("session", session.Name)
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// load markets first
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log.Infof("querying market info from %s...", session.Name)
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var disableMarketsCache = false
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var markets types.MarketMap
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var err error
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if util.SetEnvVarBool("DISABLE_MARKETS_CACHE", &disableMarketsCache); disableMarketsCache {
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markets, err = session.Exchange.QueryMarkets(ctx)
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} else {
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markets, err = cache.LoadExchangeMarketsWithCache(ctx, session.Exchange)
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if err != nil {
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return err
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}
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}
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if len(markets) == 0 {
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return ErrEmptyMarketInfo
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}
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session.markets = markets
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if feeRateProvider, ok := session.Exchange.(types.ExchangeDefaultFeeRates); ok {
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defaultFeeRates := feeRateProvider.DefaultFeeRates()
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if session.MakerFeeRate.IsZero() {
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session.MakerFeeRate = defaultFeeRates.MakerFeeRate
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}
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if session.TakerFeeRate.IsZero() {
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session.TakerFeeRate = defaultFeeRates.TakerFeeRate
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}
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}
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if session.ModifyOrderAmountForFee {
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amountProtectExchange, ok := session.Exchange.(types.ExchangeAmountFeeProtect)
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if !ok {
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return fmt.Errorf("exchange %s does not support order amount protection", session.ExchangeName.String())
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}
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fees := types.ExchangeFee{MakerFeeRate: session.MakerFeeRate, TakerFeeRate: session.TakerFeeRate}
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amountProtectExchange.SetModifyOrderAmountForFee(fees)
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}
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if session.UseHeikinAshi {
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session.MarketDataStream = &types.HeikinAshiStream{
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StandardStreamEmitter: session.MarketDataStream.(types.StandardStreamEmitter),
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}
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}
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// query and initialize the balances
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if !session.PublicOnly {
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log.Infof("querying account balances...")
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account, err := session.Exchange.QueryAccount(ctx)
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if err != nil {
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return err
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}
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session.accountMutex.Lock()
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session.Account = account
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session.accountMutex.Unlock()
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log.Infof("account %s balances:", session.Name)
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account.Balances().Print()
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// forward trade updates and order updates to the order executor
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session.UserDataStream.OnTradeUpdate(session.OrderExecutor.EmitTradeUpdate)
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session.UserDataStream.OnOrderUpdate(session.OrderExecutor.EmitOrderUpdate)
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session.UserDataStream.OnBalanceSnapshot(func(balances types.BalanceMap) {
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session.accountMutex.Lock()
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session.Account.UpdateBalances(balances)
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session.accountMutex.Unlock()
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})
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session.UserDataStream.OnBalanceUpdate(func(balances types.BalanceMap) {
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session.accountMutex.Lock()
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session.Account.UpdateBalances(balances)
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session.accountMutex.Unlock()
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})
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session.bindConnectionStatusNotification(session.UserDataStream, "user data")
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// if metrics mode is enabled, we bind the callbacks to update metrics
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if viper.GetBool("metrics") {
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session.metricsBalancesUpdater(account.Balances())
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session.bindUserDataStreamMetrics(session.UserDataStream)
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}
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}
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if environ.loggingConfig != nil {
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if environ.loggingConfig.Trade {
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session.UserDataStream.OnTradeUpdate(func(trade types.Trade) {
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log.Info(trade.String())
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})
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}
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if environ.loggingConfig.Order {
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session.UserDataStream.OnOrderUpdate(func(order types.Order) {
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log.Info(order.String())
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})
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}
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} else {
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// if logging config is nil, then apply default logging setup
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// add trade logger
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session.UserDataStream.OnTradeUpdate(func(trade types.Trade) {
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log.Info(trade.String())
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})
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}
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if viper.GetBool("debug-kline") {
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session.MarketDataStream.OnKLine(func(kline types.KLine) {
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log.WithField("marketData", "kline").Infof("kline: %+v", kline)
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})
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session.MarketDataStream.OnKLineClosed(func(kline types.KLine) {
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log.WithField("marketData", "kline").Infof("kline closed: %+v", kline)
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})
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}
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// update last prices
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if session.UseHeikinAshi {
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session.MarketDataStream.OnKLineClosed(func(kline types.KLine) {
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if _, ok := session.startPrices[kline.Symbol]; !ok {
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session.startPrices[kline.Symbol] = kline.Open
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}
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session.lastPrices[kline.Symbol] = session.MarketDataStream.(*types.HeikinAshiStream).LastOrigin[kline.Symbol][kline.Interval].Close
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})
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} else {
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session.MarketDataStream.OnKLineClosed(func(kline types.KLine) {
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if _, ok := session.startPrices[kline.Symbol]; !ok {
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session.startPrices[kline.Symbol] = kline.Open
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}
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session.lastPrices[kline.Symbol] = kline.Close
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})
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}
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session.MarketDataStream.OnMarketTrade(func(trade types.Trade) {
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session.lastPrices[trade.Symbol] = trade.Price
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})
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session.IsInitialized = true
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return nil
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}
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func (session *ExchangeSession) InitSymbols(ctx context.Context, environ *Environment) error {
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if err := session.initUsedSymbols(ctx, environ); err != nil {
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return err
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}
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return nil
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}
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// initUsedSymbols uses usedSymbols to initialize the related data structure
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func (session *ExchangeSession) initUsedSymbols(ctx context.Context, environ *Environment) error {
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for symbol := range session.usedSymbols {
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if err := session.initSymbol(ctx, environ, symbol); err != nil {
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return err
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}
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}
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return nil
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}
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// initSymbol loads trades for the symbol, bind stream callbacks, init positions, market data store.
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// please note, initSymbol can not be called for the same symbol for twice
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func (session *ExchangeSession) initSymbol(ctx context.Context, environ *Environment, symbol string) error {
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if _, ok := session.initializedSymbols[symbol]; ok {
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// return fmt.Errorf("symbol %s is already initialized", symbol)
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return nil
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}
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market, ok := session.markets[symbol]
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if !ok {
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return fmt.Errorf("market %s is not defined", symbol)
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}
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var err error
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var trades []types.Trade
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if environ.SyncService != nil && environ.BacktestService == nil {
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tradingFeeCurrency := session.Exchange.PlatformFeeCurrency()
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if strings.HasPrefix(symbol, tradingFeeCurrency) {
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trades, err = environ.TradeService.QueryForTradingFeeCurrency(session.Exchange.Name(), symbol, tradingFeeCurrency)
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} else {
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trades, err = environ.TradeService.Query(service.QueryTradesOptions{
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Exchange: session.Exchange.Name(),
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Symbol: symbol,
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Ordering: "DESC",
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Limit: 100,
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})
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}
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if err != nil {
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return err
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}
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trades = types.SortTradesAscending(trades)
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log.Infof("symbol %s: %d trades loaded", symbol, len(trades))
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}
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session.Trades[symbol] = &types.TradeSlice{Trades: trades}
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session.UserDataStream.OnTradeUpdate(func(trade types.Trade) {
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if trade.Symbol == symbol {
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session.Trades[symbol].Append(trade)
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}
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})
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position := &types.Position{
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Symbol: symbol,
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BaseCurrency: market.BaseCurrency,
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QuoteCurrency: market.QuoteCurrency,
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}
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position.AddTrades(trades)
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position.BindStream(session.UserDataStream)
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session.positions[symbol] = position
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orderStore := NewOrderStore(symbol)
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orderStore.AddOrderUpdate = true
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orderStore.BindStream(session.UserDataStream)
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session.orderStores[symbol] = orderStore
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if _, ok := session.marketDataStores[symbol]; !ok {
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marketDataStore := NewMarketDataStore(symbol)
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marketDataStore.BindStream(session.MarketDataStream)
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session.marketDataStores[symbol] = marketDataStore
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}
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marketDataStore := session.marketDataStores[symbol]
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if _, ok := session.standardIndicatorSets[symbol]; !ok {
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standardIndicatorSet := NewStandardIndicatorSet(symbol, session.MarketDataStream, marketDataStore)
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session.standardIndicatorSets[symbol] = standardIndicatorSet
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}
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// used kline intervals by the given symbol
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var klineSubscriptions = map[types.Interval]struct{}{}
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minInterval := types.Interval1m
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// Aggregate the intervals that we are using in the subscriptions.
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for _, sub := range session.Subscriptions {
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switch sub.Channel {
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case types.BookChannel:
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book := types.NewStreamBook(sub.Symbol)
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book.BindStream(session.MarketDataStream)
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session.orderBooks[sub.Symbol] = book
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case types.KLineChannel:
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if sub.Options.Interval == "" {
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continue
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}
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if minInterval.Seconds() > sub.Options.Interval.Seconds() {
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minInterval = sub.Options.Interval
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}
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if sub.Symbol == symbol {
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klineSubscriptions[types.Interval(sub.Options.Interval)] = struct{}{}
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}
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}
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}
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// always subscribe the 1m kline so we can make sure the connection persists.
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klineSubscriptions[minInterval] = struct{}{}
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for interval := range klineSubscriptions {
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// avoid querying the last unclosed kline
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endTime := environ.startTime
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var i int64
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for i = 0; i < KLinePreloadLimit; i += 1000 {
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var duration time.Duration = time.Duration(-i * int64(interval.Duration()))
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e := endTime.Add(duration)
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kLines, err := session.Exchange.QueryKLines(ctx, symbol, interval, types.KLineQueryOptions{
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EndTime: &e,
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Limit: 1000, // indicators need at least 100
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})
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if err != nil {
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return err
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}
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if len(kLines) == 0 {
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log.Warnf("no kline data for %s %s (end time <= %s)", symbol, interval, e)
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continue
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}
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// update last prices by the given kline
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lastKLine := kLines[len(kLines)-1]
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if interval == minInterval {
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session.lastPrices[symbol] = lastKLine.Close
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}
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for _, k := range kLines {
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// let market data store trigger the update, so that the indicator could be updated too.
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marketDataStore.AddKLine(k)
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}
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}
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}
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log.Infof("%s last price: %v", symbol, session.lastPrices[symbol])
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session.initializedSymbols[symbol] = struct{}{}
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return nil
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}
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// Indicators returns the IndicatorSet struct that maintains the kLines stream cache and price stream cache
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// It also provides helper methods
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func (session *ExchangeSession) Indicators(symbol string) *IndicatorSet {
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set, ok := session.indicators[symbol]
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if ok {
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return set
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}
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store, _ := session.MarketDataStore(symbol)
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set = NewIndicatorSet(symbol, session.MarketDataStream, store)
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session.indicators[symbol] = set
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return set
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}
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func (session *ExchangeSession) StandardIndicatorSet(symbol string) *StandardIndicatorSet {
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log.Warnf("StandardIndicatorSet() is deprecated in v1.49.0 and which will be removed in the next version, please use Indicators() instead")
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set, ok := session.standardIndicatorSets[symbol]
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if ok {
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return set
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}
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store, _ := session.MarketDataStore(symbol)
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set = NewStandardIndicatorSet(symbol, session.MarketDataStream, store)
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session.standardIndicatorSets[symbol] = set
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return set
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}
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|
func (session *ExchangeSession) Position(symbol string) (pos *types.Position, ok bool) {
|
|
pos, ok = session.positions[symbol]
|
|
if ok {
|
|
return pos, ok
|
|
}
|
|
|
|
market, ok := session.markets[symbol]
|
|
if !ok {
|
|
return nil, false
|
|
}
|
|
|
|
pos = &types.Position{
|
|
Symbol: symbol,
|
|
BaseCurrency: market.BaseCurrency,
|
|
QuoteCurrency: market.QuoteCurrency,
|
|
}
|
|
ok = true
|
|
session.positions[symbol] = pos
|
|
return pos, ok
|
|
}
|
|
|
|
func (session *ExchangeSession) Positions() map[string]*types.Position {
|
|
return session.positions
|
|
}
|
|
|
|
// MarketDataStore returns the market data store of a symbol
|
|
func (session *ExchangeSession) MarketDataStore(symbol string) (s *MarketDataStore, ok bool) {
|
|
s, ok = session.marketDataStores[symbol]
|
|
// FIXME: the returned MarketDataStore when !ok will be empty
|
|
if !ok {
|
|
s = NewMarketDataStore(symbol)
|
|
s.BindStream(session.MarketDataStream)
|
|
session.marketDataStores[symbol] = s
|
|
return s, true
|
|
}
|
|
return s, ok
|
|
}
|
|
|
|
// KLine updates will be received in the order listend in intervals array
|
|
func (session *ExchangeSession) SerialMarketDataStore(ctx context.Context, symbol string, intervals []types.Interval, useAggTrade ...bool) (store *SerialMarketDataStore, ok bool) {
|
|
st, ok := session.MarketDataStore(symbol)
|
|
if !ok {
|
|
return nil, false
|
|
}
|
|
minInterval := types.Interval1m
|
|
for _, i := range intervals {
|
|
if minInterval.Seconds() > i.Seconds() {
|
|
minInterval = i
|
|
}
|
|
}
|
|
store = NewSerialMarketDataStore(symbol, minInterval, useAggTrade...)
|
|
klines, ok := st.KLinesOfInterval(minInterval)
|
|
if !ok {
|
|
log.Errorf("SerialMarketDataStore: cannot get %s history", minInterval)
|
|
return nil, false
|
|
}
|
|
for _, interval := range intervals {
|
|
store.Subscribe(interval)
|
|
}
|
|
for _, kline := range *klines {
|
|
store.AddKLine(kline)
|
|
}
|
|
store.BindStream(ctx, session.MarketDataStream)
|
|
return store, true
|
|
}
|
|
|
|
// OrderBook returns the personal orderbook of a symbol
|
|
func (session *ExchangeSession) OrderBook(symbol string) (s *types.StreamOrderBook, ok bool) {
|
|
s, ok = session.orderBooks[symbol]
|
|
return s, ok
|
|
}
|
|
|
|
func (session *ExchangeSession) StartPrice(symbol string) (price fixedpoint.Value, ok bool) {
|
|
price, ok = session.startPrices[symbol]
|
|
return price, ok
|
|
}
|
|
|
|
func (session *ExchangeSession) LastPrice(symbol string) (price fixedpoint.Value, ok bool) {
|
|
price, ok = session.lastPrices[symbol]
|
|
return price, ok
|
|
}
|
|
|
|
func (session *ExchangeSession) AllLastPrices() map[string]fixedpoint.Value {
|
|
return session.lastPrices
|
|
}
|
|
|
|
func (session *ExchangeSession) LastPrices() map[string]fixedpoint.Value {
|
|
return session.lastPrices
|
|
}
|
|
|
|
func (session *ExchangeSession) Market(symbol string) (market types.Market, ok bool) {
|
|
market, ok = session.markets[symbol]
|
|
return market, ok
|
|
}
|
|
|
|
func (session *ExchangeSession) Markets() map[string]types.Market {
|
|
return session.markets
|
|
}
|
|
|
|
func (session *ExchangeSession) OrderStore(symbol string) (store *OrderStore, ok bool) {
|
|
store, ok = session.orderStores[symbol]
|
|
return store, ok
|
|
}
|
|
|
|
func (session *ExchangeSession) OrderStores() map[string]*OrderStore {
|
|
return session.orderStores
|
|
}
|
|
|
|
// Subscribe save the subscription info, later it will be assigned to the stream
|
|
func (session *ExchangeSession) Subscribe(channel types.Channel, symbol string, options types.SubscribeOptions) *ExchangeSession {
|
|
if channel == types.KLineChannel && len(options.Interval) == 0 {
|
|
panic("subscription interval for kline can not be empty")
|
|
}
|
|
|
|
sub := types.Subscription{
|
|
Channel: channel,
|
|
Symbol: symbol,
|
|
Options: options,
|
|
}
|
|
|
|
// add to the loaded symbol table
|
|
session.usedSymbols[symbol] = struct{}{}
|
|
session.Subscriptions[sub] = sub
|
|
return session
|
|
}
|
|
|
|
func (session *ExchangeSession) FormatOrder(order types.SubmitOrder) (types.SubmitOrder, error) {
|
|
market, ok := session.Market(order.Symbol)
|
|
if !ok {
|
|
return order, fmt.Errorf("market is not defined: %s", order.Symbol)
|
|
}
|
|
|
|
order.Market = market
|
|
return order, nil
|
|
}
|
|
|
|
func (session *ExchangeSession) UpdatePrices(ctx context.Context, currencies []string, fiat string) (err error) {
|
|
// TODO: move this cache check to the http routes
|
|
// if session.lastPriceUpdatedAt.After(time.Now().Add(-time.Hour)) {
|
|
// return nil
|
|
// }
|
|
|
|
var symbols []string
|
|
for _, c := range currencies {
|
|
symbols = append(symbols, c+fiat) // BTC/USDT
|
|
symbols = append(symbols, fiat+c) // USDT/TWD
|
|
}
|
|
|
|
tickers, err := session.Exchange.QueryTickers(ctx, symbols...)
|
|
if err != nil || len(tickers) == 0 {
|
|
return err
|
|
}
|
|
|
|
var lastTime time.Time
|
|
for k, v := range tickers {
|
|
// for {Crypto}/USDT markets
|
|
session.lastPrices[k] = v.Last
|
|
if v.Time.After(lastTime) {
|
|
lastTime = v.Time
|
|
}
|
|
}
|
|
|
|
session.lastPriceUpdatedAt = lastTime
|
|
return err
|
|
}
|
|
|
|
func (session *ExchangeSession) FindPossibleSymbols() (symbols []string, err error) {
|
|
// If the session is an isolated margin session, there will be only the isolated margin symbol
|
|
if session.Margin && session.IsolatedMargin {
|
|
return []string{
|
|
session.IsolatedMarginSymbol,
|
|
}, nil
|
|
}
|
|
|
|
var balances = session.GetAccount().Balances()
|
|
var fiatAssets []string
|
|
|
|
for _, currency := range types.FiatCurrencies {
|
|
if balance, ok := balances[currency]; ok && balance.Total().Sign() > 0 {
|
|
fiatAssets = append(fiatAssets, currency)
|
|
}
|
|
}
|
|
|
|
var symbolMap = map[string]struct{}{}
|
|
|
|
for _, market := range session.Markets() {
|
|
// ignore the markets that are not fiat currency markets
|
|
if !util.StringSliceContains(fiatAssets, market.QuoteCurrency) {
|
|
continue
|
|
}
|
|
|
|
// ignore the asset that we don't have in the balance sheet
|
|
balance, hasAsset := balances[market.BaseCurrency]
|
|
if !hasAsset || balance.Total().IsZero() {
|
|
continue
|
|
}
|
|
|
|
symbolMap[market.Symbol] = struct{}{}
|
|
}
|
|
|
|
for s := range symbolMap {
|
|
symbols = append(symbols, s)
|
|
}
|
|
|
|
return symbols, nil
|
|
}
|
|
|
|
// newBasicPrivateExchange allocates a basic exchange instance with the user private credentials
|
|
func (session *ExchangeSession) newBasicPrivateExchange(exchangeName types.ExchangeName) (types.Exchange, error) {
|
|
var err error
|
|
var exMinimal types.ExchangeMinimal
|
|
if session.Key != "" && session.Secret != "" {
|
|
exMinimal, err = exchange2.New(exchangeName, session.Key, session.Secret, session.Passphrase)
|
|
} else {
|
|
exMinimal, err = exchange2.NewWithEnvVarPrefix(exchangeName, session.EnvVarPrefix)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if ex, ok := exMinimal.(types.Exchange); ok {
|
|
return ex, nil
|
|
}
|
|
|
|
return nil, fmt.Errorf("exchange %T does not implement types.Exchange", exMinimal)
|
|
}
|
|
|
|
// InitExchange initialize the exchange instance and allocate memory for fields
|
|
// In this stage, the session var could be loaded from the JSON config, so the pointer fields are still nil
|
|
// The Init method will be called after this stage, environment.Init will call the session.Init method later.
|
|
func (session *ExchangeSession) InitExchange(name string, ex types.Exchange) error {
|
|
var err error
|
|
var exchangeName = session.ExchangeName
|
|
|
|
if ex == nil {
|
|
if session.PublicOnly {
|
|
ex, err = exchange2.NewPublic(exchangeName)
|
|
} else {
|
|
ex, err = session.newBasicPrivateExchange(exchangeName)
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// configure exchange
|
|
if session.Margin {
|
|
marginExchange, ok := ex.(types.MarginExchange)
|
|
if !ok {
|
|
return fmt.Errorf("exchange %s does not support margin", exchangeName)
|
|
}
|
|
|
|
if session.IsolatedMargin {
|
|
marginExchange.UseIsolatedMargin(session.IsolatedMarginSymbol)
|
|
} else {
|
|
marginExchange.UseMargin()
|
|
}
|
|
}
|
|
|
|
if session.Futures {
|
|
futuresExchange, ok := ex.(types.FuturesExchange)
|
|
if !ok {
|
|
return fmt.Errorf("exchange %s does not support futures", exchangeName)
|
|
}
|
|
|
|
if session.IsolatedFutures {
|
|
futuresExchange.UseIsolatedFutures(session.IsolatedFuturesSymbol)
|
|
} else {
|
|
futuresExchange.UseFutures()
|
|
}
|
|
}
|
|
|
|
session.Name = name
|
|
session.Exchange = ex
|
|
session.UserDataStream = ex.NewStream()
|
|
session.MarketDataStream = ex.NewStream()
|
|
session.MarketDataStream.SetPublicOnly()
|
|
|
|
// pointer fields
|
|
session.Subscriptions = make(map[types.Subscription]types.Subscription)
|
|
session.Account = &types.Account{}
|
|
session.Trades = make(map[string]*types.TradeSlice)
|
|
|
|
session.orderBooks = make(map[string]*types.StreamOrderBook)
|
|
session.markets = make(map[string]types.Market)
|
|
session.lastPrices = make(map[string]fixedpoint.Value)
|
|
session.startPrices = make(map[string]fixedpoint.Value)
|
|
session.marketDataStores = make(map[string]*MarketDataStore)
|
|
session.positions = make(map[string]*types.Position)
|
|
session.standardIndicatorSets = make(map[string]*StandardIndicatorSet)
|
|
session.indicators = make(map[string]*IndicatorSet)
|
|
session.orderStores = make(map[string]*OrderStore)
|
|
session.OrderExecutor = &ExchangeOrderExecutor{
|
|
// copy the notification system so that we can route
|
|
Session: session,
|
|
}
|
|
|
|
session.usedSymbols = make(map[string]struct{})
|
|
session.initializedSymbols = make(map[string]struct{})
|
|
session.logger = log.WithField("session", name)
|
|
return nil
|
|
}
|
|
|
|
func (session *ExchangeSession) MarginType() string {
|
|
margin := "none"
|
|
if session.Margin {
|
|
margin = "margin"
|
|
if session.IsolatedMargin {
|
|
margin = "isolated"
|
|
}
|
|
}
|
|
return margin
|
|
}
|
|
|
|
func (session *ExchangeSession) metricsBalancesUpdater(balances types.BalanceMap) {
|
|
for currency, balance := range balances {
|
|
labels := prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"symbol": session.IsolatedMarginSymbol,
|
|
"currency": currency,
|
|
}
|
|
|
|
metricsTotalBalances.With(labels).Set(balance.Total().Float64())
|
|
metricsLockedBalances.With(labels).Set(balance.Locked.Float64())
|
|
metricsAvailableBalances.With(labels).Set(balance.Available.Float64())
|
|
metricsLastUpdateTimeBalance.With(prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"channel": "user",
|
|
"data_type": "balance",
|
|
"symbol": "",
|
|
"currency": currency,
|
|
}).SetToCurrentTime()
|
|
}
|
|
|
|
}
|
|
|
|
func (session *ExchangeSession) metricsOrderUpdater(order types.Order) {
|
|
metricsLastUpdateTimeBalance.With(prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"channel": "user",
|
|
"data_type": "order",
|
|
"symbol": order.Symbol,
|
|
"currency": "",
|
|
}).SetToCurrentTime()
|
|
}
|
|
|
|
func (session *ExchangeSession) metricsTradeUpdater(trade types.Trade) {
|
|
labels := prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"side": trade.Side.String(),
|
|
"symbol": trade.Symbol,
|
|
"liquidity": trade.Liquidity(),
|
|
}
|
|
metricsTradingVolume.With(labels).Add(trade.Quantity.Mul(trade.Price).Float64())
|
|
metricsTradesTotal.With(labels).Inc()
|
|
metricsLastUpdateTimeBalance.With(prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"channel": "user",
|
|
"data_type": "trade",
|
|
"symbol": trade.Symbol,
|
|
"currency": "",
|
|
}).SetToCurrentTime()
|
|
}
|
|
|
|
func (session *ExchangeSession) bindMarketDataStreamMetrics(stream types.Stream) {
|
|
stream.OnBookUpdate(func(book types.SliceOrderBook) {
|
|
metricsLastUpdateTimeBalance.With(prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"channel": "market",
|
|
"data_type": "book",
|
|
"symbol": book.Symbol,
|
|
"currency": "",
|
|
}).SetToCurrentTime()
|
|
})
|
|
stream.OnKLineClosed(func(kline types.KLine) {
|
|
metricsLastUpdateTimeBalance.With(prometheus.Labels{
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"channel": "market",
|
|
"data_type": "kline",
|
|
"symbol": kline.Symbol,
|
|
"currency": "",
|
|
}).SetToCurrentTime()
|
|
})
|
|
}
|
|
|
|
func (session *ExchangeSession) bindUserDataStreamMetrics(stream types.Stream) {
|
|
stream.OnBalanceUpdate(session.metricsBalancesUpdater)
|
|
stream.OnBalanceSnapshot(session.metricsBalancesUpdater)
|
|
stream.OnTradeUpdate(session.metricsTradeUpdater)
|
|
stream.OnOrderUpdate(session.metricsOrderUpdater)
|
|
stream.OnDisconnect(func() {
|
|
metricsConnectionStatus.With(prometheus.Labels{
|
|
"channel": "user",
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"symbol": session.IsolatedMarginSymbol,
|
|
}).Set(0.0)
|
|
})
|
|
stream.OnConnect(func() {
|
|
metricsConnectionStatus.With(prometheus.Labels{
|
|
"channel": "user",
|
|
"exchange": session.ExchangeName.String(),
|
|
"margin": session.MarginType(),
|
|
"symbol": session.IsolatedMarginSymbol,
|
|
}).Set(1.0)
|
|
})
|
|
}
|
|
|
|
func (session *ExchangeSession) bindConnectionStatusNotification(stream types.Stream, streamName string) {
|
|
stream.OnDisconnect(func() {
|
|
Notify("session %s %s stream disconnected", session.Name, streamName)
|
|
})
|
|
stream.OnConnect(func() {
|
|
Notify("session %s %s stream connected", session.Name, streamName)
|
|
})
|
|
}
|
|
|
|
func (session *ExchangeSession) SlackAttachment() slack.Attachment {
|
|
var fields []slack.AttachmentField
|
|
var footerIcon = types.ExchangeFooterIcon(session.ExchangeName)
|
|
return slack.Attachment{
|
|
// Pretext: "",
|
|
// Text: text,
|
|
Title: session.Name,
|
|
Fields: fields,
|
|
FooterIcon: footerIcon,
|
|
Footer: templateutil.Render("update time {{ . }}", time.Now().Format(time.RFC822)),
|
|
}
|
|
}
|
|
|
|
func (session *ExchangeSession) FormatOrders(orders []types.SubmitOrder) (formattedOrders []types.SubmitOrder, err error) {
|
|
for _, order := range orders {
|
|
o, err := session.FormatOrder(order)
|
|
if err != nil {
|
|
return formattedOrders, err
|
|
}
|
|
formattedOrders = append(formattedOrders, o)
|
|
}
|
|
|
|
return formattedOrders, err
|
|
}
|