mirror of
https://github.com/c9s/bbgo.git
synced 2024-11-10 09:11:55 +00:00
pkg/exchange: support kline subscription on stream
This commit is contained in:
Edwin
parent
7c1060c208
commit
102b662f7c
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@ -5,17 +5,11 @@ import (
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"context"
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"encoding/json"
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"fmt"
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"time"
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"github.com/gorilla/websocket"
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"strings"
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"github.com/c9s/bbgo/pkg/exchange/bitget/bitgetapi"
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"github.com/c9s/bbgo/pkg/types"
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"github.com/gorilla/websocket"
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)
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const (
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// Client should keep ping the server in every 30 seconds. Server will close the connections which has no ping over
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// 120 seconds(even when the client is still receiving data from the server)
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pingInterval = 30 * time.Second
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)
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var (
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@ -29,11 +23,15 @@ type Stream struct {
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bookEventCallbacks []func(o BookEvent)
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marketTradeEventCallbacks []func(o MarketTradeEvent)
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KLineEventCallbacks []func(o KLineEvent)
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lastCandle map[string]types.KLine
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}
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func NewStream() *Stream {
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stream := &Stream{
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StandardStream: types.NewStandardStream(),
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lastCandle: map[string]types.KLine{},
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}
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stream.SetEndpointCreator(stream.createEndpoint)
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@ -44,6 +42,7 @@ func NewStream() *Stream {
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stream.OnBookEvent(stream.handleBookEvent)
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stream.OnMarketTradeEvent(stream.handleMaretTradeEvent)
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stream.OnKLineEvent(stream.handleKLineEvent)
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return stream
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}
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@ -108,6 +107,9 @@ func (s *Stream) dispatchEvent(event interface{}) {
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case *MarketTradeEvent:
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s.EmitMarketTradeEvent(*e)
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case *KLineEvent:
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s.EmitKLineEvent(*e)
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case []byte:
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// We only handle the 'pong' case. Others are unexpected.
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if !bytes.Equal(e, pongBytes) {
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@ -171,6 +173,15 @@ func convertSubscription(sub types.Subscription) (WsArg, error) {
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case types.MarketTradeChannel:
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arg.Channel = ChannelTrade
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return arg, nil
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case types.KLineChannel:
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interval, found := toLocalInterval[sub.Options.Interval]
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if !found {
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return WsArg{}, fmt.Errorf("interval %s not supported on KLine subscription", sub.Options.Interval)
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}
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arg.Channel = ChannelType(interval)
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return arg, nil
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}
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return arg, fmt.Errorf("unsupported stream channel: %s", sub.Channel)
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@ -200,7 +211,8 @@ func parseEvent(in []byte) (interface{}, error) {
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return &event, nil
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}
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switch event.Arg.Channel {
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ch := event.Arg.Channel
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switch ch {
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case ChannelOrderBook, ChannelOrderBook5, ChannelOrderBook15:
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var book BookEvent
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err = json.Unmarshal(event.Data, &book.Events)
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@ -222,9 +234,26 @@ func parseEvent(in []byte) (interface{}, error) {
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trade.actionType = event.Action
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trade.instId = event.Arg.InstId
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return &trade, nil
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}
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return nil, fmt.Errorf("unhandled websocket event: %+v", string(in))
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default:
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// handle the `KLine` case here to avoid complicating the code structure.
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if strings.HasPrefix(string(ch), "candle") {
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var kline KLineEvent
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err = json.Unmarshal(event.Data, &kline.Events)
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if err != nil {
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return nil, fmt.Errorf("failed to unmarshal data into KLineEvent, Arg: %+v Data: %s, err: %w", event.Arg, string(event.Data), err)
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}
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kline.actionType = event.Action
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kline.channel = ch
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kline.instId = event.Arg.InstId
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return &kline, nil
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}
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// return an error for any other case
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return nil, fmt.Errorf("unhandled websocket event: %+v", string(in))
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}
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}
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func (s *Stream) handleMaretTradeEvent(m MarketTradeEvent) {
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@ -242,3 +271,28 @@ func (s *Stream) handleMaretTradeEvent(m MarketTradeEvent) {
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s.EmitMarketTrade(globalTrade)
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}
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}
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func (s *Stream) handleKLineEvent(k KLineEvent) {
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if k.actionType == ActionTypeSnapshot {
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// we don't support snapshot event
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return
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}
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interval, found := toGlobalInterval[string(k.channel)]
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if !found {
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log.Errorf("unexpected interval %s on KLine subscription", k.channel)
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return
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}
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for _, kline := range k.Events {
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last, ok := s.lastCandle[k.CacheKey()]
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if ok && kline.StartTime.Time().After(last.StartTime.Time()) {
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last.Closed = true
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s.EmitKLineClosed(last)
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}
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kLine := kline.ToGlobal(interval, k.instId)
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s.EmitKLine(kLine)
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s.lastCandle[k.CacheKey()] = kLine
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}
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}
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@ -23,3 +23,13 @@ func (s *Stream) EmitMarketTradeEvent(o MarketTradeEvent) {
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cb(o)
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}
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}
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func (s *Stream) OnKLineEvent(cb func(o KLineEvent)) {
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s.KLineEventCallbacks = append(s.KLineEventCallbacks, cb)
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}
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func (s *Stream) EmitKLineEvent(o KLineEvent) {
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for _, cb := range s.KLineEventCallbacks {
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cb(o)
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}
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}
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@ -106,6 +106,22 @@ func TestStream(t *testing.T) {
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<-c
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})
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t.Run("kline test", func(t *testing.T) {
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s.Subscribe(types.KLineChannel, "BTCUSDT", types.SubscribeOptions{Interval: types.Interval1w})
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s.SetPublicOnly()
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err := s.Connect(context.Background())
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assert.NoError(t, err)
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s.OnKLine(func(kline types.KLine) {
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t.Log("got update", kline)
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})
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s.OnKLineClosed(func(kline types.KLine) {
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t.Log("got closed update", kline)
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})
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c := make(chan struct{})
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<-c
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})
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}
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func TestStream_parseWebSocketEvent(t *testing.T) {
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@ -453,6 +469,174 @@ func Test_parseWebSocketEvent_MarketTrade(t *testing.T) {
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})
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}
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func Test_parseWebSocketEvent_KLine(t *testing.T) {
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t.Run("KLine event", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","34361.49","34458.98","34355.53","34416.41","99.6631"]
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],
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"ts":1697697791670
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}`
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eventFn := func(in string, actionType ActionType) {
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res, err := parseWebSocketEvent([]byte(in))
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assert.NoError(t, err)
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kline, ok := res.(*KLineEvent)
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assert.True(t, ok)
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assert.Equal(t, KLineEvent{
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channel: "candle5m",
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Events: KLineSlice{
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{
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StartTime: types.NewMillisecondTimestampFromInt(1698744600000),
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OpenPrice: fixedpoint.NewFromFloat(34361.49),
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HighestPrice: fixedpoint.NewFromFloat(34458.98),
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LowestPrice: fixedpoint.NewFromFloat(34355.53),
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ClosePrice: fixedpoint.NewFromFloat(34416.41),
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Volume: fixedpoint.NewFromFloat(99.6631),
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},
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},
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actionType: actionType,
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instId: "BTCUSDT",
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}, *kline)
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}
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t.Run("snapshot type", func(t *testing.T) {
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snapshotInput := fmt.Sprintf(input, ActionTypeSnapshot)
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eventFn(snapshotInput, ActionTypeSnapshot)
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})
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t.Run("update type", func(t *testing.T) {
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snapshotInput := fmt.Sprintf(input, ActionTypeUpdate)
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eventFn(snapshotInput, ActionTypeUpdate)
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})
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})
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t.Run("Unexpected length of kline", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","34361.45","34458.98","34355.53","34416.41","99.6631", "123456"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "unexpected kline length")
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})
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t.Run("Unexpected timestamp", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["timestamp","34361.49","34458.98","34355.53","34416.41","99.6631"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "timestamp")
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})
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t.Run("Unexpected open price", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","1p","34458.98","34355.53","34416.41","99.6631"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "open price")
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})
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t.Run("Unexpected highest price", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","34361.45","3p","34355.53","34416.41","99.6631"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "highest price")
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})
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t.Run("Unexpected lowest price", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","34361.45","34458.98","1p","34416.41","99.6631"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "lowest price")
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})
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t.Run("Unexpected close price", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","34361.45","34458.98","34355.53","1c","99.6631"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "close price")
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})
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t.Run("Unexpected volume", func(t *testing.T) {
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input := `{
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"action":"%s",
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"arg":{
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"instType":"sp",
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"channel":"candle5m",
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"instId":"BTCUSDT"
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},
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"data":[
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["1698744600000","34361.45","34458.98","34355.53","34416.41", "1v"]
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],
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"ts":1697697791670
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}`
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_, err := parseWebSocketEvent([]byte(input))
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assert.ErrorContains(t, err, "volume")
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})
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}
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func Test_convertSubscription(t *testing.T) {
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t.Run("BookChannel.ChannelOrderBook5", func(t *testing.T) {
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res, err := convertSubscription(types.Subscription{
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@ -512,4 +696,21 @@ func Test_convertSubscription(t *testing.T) {
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InstId: "BTCUSDT",
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}, res)
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})
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t.Run("CandleChannel", func(t *testing.T) {
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for gInterval, localInterval := range toLocalInterval {
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res, err := convertSubscription(types.Subscription{
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Symbol: "BTCUSDT",
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Channel: types.KLineChannel,
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Options: types.SubscribeOptions{
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Interval: gInterval,
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},
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})
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assert.NoError(t, err)
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assert.Equal(t, WsArg{
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InstType: instSp,
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Channel: ChannelType(localInterval),
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InstId: "BTCUSDT",
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}, res)
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}
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})
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}
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@ -4,6 +4,7 @@ import (
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"encoding/json"
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"errors"
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"fmt"
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"time"
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"github.com/c9s/bbgo/pkg/fixedpoint"
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"github.com/c9s/bbgo/pkg/types"
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@ -260,3 +261,134 @@ type MarketTradeEvent struct {
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actionType ActionType
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instId string
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}
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var (
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toLocalInterval = map[types.Interval]string{
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types.Interval1m: "candle1m",
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types.Interval5m: "candle5m",
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types.Interval15m: "candle15m",
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types.Interval30m: "candle30m",
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types.Interval1h: "candle1H",
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types.Interval4h: "candle4H",
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types.Interval12h: "candle12H",
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types.Interval1d: "candle1D",
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types.Interval1w: "candle1W",
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}
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toGlobalInterval = map[string]types.Interval{
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"candle1m": types.Interval1m,
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"candle5m": types.Interval5m,
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"candle15m": types.Interval15m,
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"candle30m": types.Interval30m,
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"candle1H": types.Interval1h,
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"candle4H": types.Interval4h,
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"candle12H": types.Interval12h,
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"candle1D": types.Interval1d,
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"candle1W": types.Interval1w,
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}
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)
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type KLine struct {
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StartTime types.MillisecondTimestamp
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OpenPrice fixedpoint.Value
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HighestPrice fixedpoint.Value
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LowestPrice fixedpoint.Value
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ClosePrice fixedpoint.Value
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Volume fixedpoint.Value
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}
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func (k KLine) ToGlobal(interval types.Interval, symbol string) types.KLine {
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startTime := k.StartTime.Time()
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return types.KLine{
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Exchange: types.ExchangeBitget,
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Symbol: symbol,
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StartTime: types.Time(startTime),
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EndTime: types.Time(startTime.Add(interval.Duration() - time.Millisecond)),
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Interval: interval,
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Open: k.OpenPrice,
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Close: k.ClosePrice,
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High: k.HighestPrice,
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Low: k.LowestPrice,
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Volume: k.Volume,
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QuoteVolume: fixedpoint.Zero, // not supported
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TakerBuyBaseAssetVolume: fixedpoint.Zero, // not supported
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TakerBuyQuoteAssetVolume: fixedpoint.Zero, // not supported
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LastTradeID: 0, // not supported
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NumberOfTrades: 0, // not supported
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Closed: false,
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}
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}
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type KLineSlice []KLine
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func (m *KLineSlice) UnmarshalJSON(b []byte) error {
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if m == nil {
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return errors.New("nil pointer of kline slice")
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}
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s, err := parseKLineSliceJSON(b)
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if err != nil {
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return err
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}
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*m = s
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return nil
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}
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// parseKLineSliceJSON tries to parse a 2 dimensional string array into a KLineSlice
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//
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// [
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//
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// ["1597026383085", "8533.02", "8553.74", "8527.17", "8548.26", "45247"]
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// ]
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func parseKLineSliceJSON(in []byte) (slice KLineSlice, err error) {
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var rawKLines [][]json.RawMessage
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err = json.Unmarshal(in, &rawKLines)
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if err != nil {
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return slice, err
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}
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for _, raw := range rawKLines {
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if len(raw) != 6 {
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return nil, fmt.Errorf("unexpected kline length: %d, data: %q", len(raw), raw)
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}
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var kline KLine
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if err = json.Unmarshal(raw[0], &kline.StartTime); err != nil {
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return nil, fmt.Errorf("failed to unmarshal into timestamp: %q", raw[0])
|
||||
}
|
||||
if err = json.Unmarshal(raw[1], &kline.OpenPrice); err != nil {
|
||||
return nil, fmt.Errorf("failed to unmarshal into open price: %q", raw[1])
|
||||
}
|
||||
if err = json.Unmarshal(raw[2], &kline.HighestPrice); err != nil {
|
||||
return nil, fmt.Errorf("failed to unmarshal into highest price: %q", raw[2])
|
||||
}
|
||||
if err = json.Unmarshal(raw[3], &kline.LowestPrice); err != nil {
|
||||
return nil, fmt.Errorf("failed to unmarshal into lowest price: %q", raw[3])
|
||||
}
|
||||
if err = json.Unmarshal(raw[4], &kline.ClosePrice); err != nil {
|
||||
return nil, fmt.Errorf("failed to unmarshal into close price: %q", raw[4])
|
||||
}
|
||||
if err = json.Unmarshal(raw[5], &kline.Volume); err != nil {
|
||||
return nil, fmt.Errorf("failed to unmarshal into volume: %q", raw[5])
|
||||
}
|
||||
|
||||
slice = append(slice, kline)
|
||||
}
|
||||
|
||||
return slice, nil
|
||||
}
|
||||
|
||||
type KLineEvent struct {
|
||||
Events KLineSlice
|
||||
|
||||
// internal use
|
||||
actionType ActionType
|
||||
channel ChannelType
|
||||
instId string
|
||||
}
|
||||
|
||||
func (k KLineEvent) CacheKey() string {
|
||||
// e.q: candle5m.BTCUSDT
|
||||
return fmt.Sprintf("%s.%s", k.channel, k.instId)
|
||||
}
|
||||
|
|
|
|||
43
pkg/exchange/bitget/types_test.go
Normal file
43
pkg/exchange/bitget/types_test.go
Normal file
|
|
@ -0,0 +1,43 @@
|
|||
package bitget
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/stretchr/testify/assert"
|
||||
|
||||
"github.com/c9s/bbgo/pkg/fixedpoint"
|
||||
"github.com/c9s/bbgo/pkg/types"
|
||||
)
|
||||
|
||||
func TestKLine_ToGlobal(t *testing.T) {
|
||||
startTime := int64(1698744600000)
|
||||
interval := types.Interval1m
|
||||
k := KLine{
|
||||
StartTime: types.NewMillisecondTimestampFromInt(startTime),
|
||||
OpenPrice: fixedpoint.NewFromFloat(34361.49),
|
||||
HighestPrice: fixedpoint.NewFromFloat(34458.98),
|
||||
LowestPrice: fixedpoint.NewFromFloat(34355.53),
|
||||
ClosePrice: fixedpoint.NewFromFloat(34416.41),
|
||||
Volume: fixedpoint.NewFromFloat(99.6631),
|
||||
}
|
||||
|
||||
assert.Equal(t, types.KLine{
|
||||
Exchange: types.ExchangeBitget,
|
||||
Symbol: "BTCUSDT",
|
||||
StartTime: types.Time(types.NewMillisecondTimestampFromInt(startTime).Time()),
|
||||
EndTime: types.Time(types.NewMillisecondTimestampFromInt(startTime).Time().Add(interval.Duration() - time.Millisecond)),
|
||||
Interval: interval,
|
||||
Open: fixedpoint.NewFromFloat(34361.49),
|
||||
Close: fixedpoint.NewFromFloat(34416.41),
|
||||
High: fixedpoint.NewFromFloat(34458.98),
|
||||
Low: fixedpoint.NewFromFloat(34355.53),
|
||||
Volume: fixedpoint.NewFromFloat(99.6631),
|
||||
QuoteVolume: fixedpoint.Zero,
|
||||
TakerBuyBaseAssetVolume: fixedpoint.Zero,
|
||||
TakerBuyQuoteAssetVolume: fixedpoint.Zero,
|
||||
LastTradeID: 0,
|
||||
NumberOfTrades: 0,
|
||||
Closed: false,
|
||||
}, k.ToGlobal(interval, "BTCUSDT"))
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user