forked from thrasher-corp/gocryptotrader
/
btcmarkets_websocket.go
367 lines (341 loc) · 9.2 KB
/
btcmarkets_websocket.go
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package btcmarkets
import (
"encoding/json"
"errors"
"fmt"
"net/http"
"strconv"
"time"
"github.com/gorilla/websocket"
"github.com/idoall/gocryptotrader/common"
"github.com/idoall/gocryptotrader/common/crypto"
"github.com/idoall/gocryptotrader/currency"
"github.com/idoall/gocryptotrader/exchanges/asset"
"github.com/idoall/gocryptotrader/exchanges/order"
"github.com/idoall/gocryptotrader/exchanges/orderbook"
"github.com/idoall/gocryptotrader/exchanges/stream"
"github.com/idoall/gocryptotrader/exchanges/stream/buffer"
"github.com/idoall/gocryptotrader/exchanges/ticker"
"github.com/idoall/gocryptotrader/exchanges/trade"
"github.com/idoall/gocryptotrader/log"
)
const (
btcMarketsWSURL = "wss://socket.btcmarkets.net/v2"
)
// WsConnect connects to a websocket feed
func (b *BTCMarkets) WsConnect() error {
if !b.Websocket.IsEnabled() || !b.IsEnabled() {
return errors.New(stream.WebsocketNotEnabled)
}
var dialer websocket.Dialer
err := b.Websocket.Conn.Dial(&dialer, http.Header{})
if err != nil {
return err
}
if b.Verbose {
log.Debugf(log.ExchangeSys, "%s Connected to Websocket.\n", b.Name)
}
b.Websocket.Wg.Add(1)
go b.wsReadData()
return nil
}
// wsReadData receives and passes on websocket messages for processing
func (b *BTCMarkets) wsReadData() {
defer b.Websocket.Wg.Done()
for {
resp := b.Websocket.Conn.ReadMessage()
if resp.Raw == nil {
return
}
err := b.wsHandleData(resp.Raw)
if err != nil {
b.Websocket.DataHandler <- err
}
}
}
func (b *BTCMarkets) wsHandleData(respRaw []byte) error {
var wsResponse WsMessageType
err := json.Unmarshal(respRaw, &wsResponse)
if err != nil {
return err
}
switch wsResponse.MessageType {
case heartbeat:
if b.Verbose {
log.Debugf(log.ExchangeSys, "%v - Websocket heartbeat received %s", b.Name, respRaw)
}
case wsOB:
var ob WsOrderbook
err := json.Unmarshal(respRaw, &ob)
if err != nil {
return err
}
p, err := currency.NewPairFromString(ob.Currency)
if err != nil {
return err
}
var bids, asks orderbook.Items
for x := range ob.Bids {
var price, amount float64
price, err = strconv.ParseFloat(ob.Bids[x][0].(string), 64)
if err != nil {
return err
}
amount, err = strconv.ParseFloat(ob.Bids[x][1].(string), 64)
if err != nil {
return err
}
bids = append(bids, orderbook.Item{
Amount: amount,
Price: price,
OrderCount: int64(ob.Bids[x][2].(float64)),
})
}
for x := range ob.Asks {
var price, amount float64
price, err = strconv.ParseFloat(ob.Asks[x][0].(string), 64)
if err != nil {
return err
}
amount, err = strconv.ParseFloat(ob.Asks[x][1].(string), 64)
if err != nil {
return err
}
asks = append(asks, orderbook.Item{
Amount: amount,
Price: price,
OrderCount: int64(ob.Asks[x][2].(float64)),
})
}
if ob.Snapshot {
bids.SortBids() // Alignment completely out, sort is needed.
err = b.Websocket.Orderbook.LoadSnapshot(&orderbook.Base{
Pair: p,
Bids: bids,
Asks: asks,
LastUpdated: ob.Timestamp,
Asset: asset.Spot,
Exchange: b.Name,
VerifyOrderbook: b.CanVerifyOrderbook,
})
} else {
err = b.Websocket.Orderbook.Update(&buffer.Update{
UpdateTime: ob.Timestamp,
Asset: asset.Spot,
Bids: bids,
Asks: asks,
Pair: p,
})
}
if err != nil {
return err
}
case tradeEndPoint:
if !b.IsSaveTradeDataEnabled() {
return nil
}
var t WsTrade
err := json.Unmarshal(respRaw, &t)
if err != nil {
return err
}
p, err := currency.NewPairFromString(t.Currency)
if err != nil {
return err
}
side := order.Buy
if t.Side == "Ask" {
side = order.Sell
}
return trade.AddTradesToBuffer(b.Name, trade.Data{
Timestamp: t.Timestamp,
CurrencyPair: p,
AssetType: asset.Spot,
Exchange: b.Name,
Price: t.Price,
Amount: t.Volume,
Side: side,
TID: strconv.FormatInt(t.TradeID, 10),
})
case tick:
var tick WsTick
err := json.Unmarshal(respRaw, &tick)
if err != nil {
return err
}
p, err := currency.NewPairFromString(tick.Currency)
if err != nil {
return err
}
b.Websocket.DataHandler <- &ticker.Price{
ExchangeName: b.Name,
Volume: tick.Volume,
High: tick.High24,
Low: tick.Low24h,
Bid: tick.Bid,
Ask: tick.Ask,
Last: tick.Last,
LastUpdated: tick.Timestamp,
AssetType: asset.Spot,
Pair: p,
}
case fundChange:
var transferData WsFundTransfer
err := json.Unmarshal(respRaw, &transferData)
if err != nil {
return err
}
b.Websocket.DataHandler <- transferData
case orderChange:
var orderData WsOrderChange
err := json.Unmarshal(respRaw, &orderData)
if err != nil {
return err
}
originalAmount := orderData.OpenVolume
var price float64
var trades []order.TradeHistory
var orderID = strconv.FormatInt(orderData.OrderID, 10)
for x := range orderData.Trades {
var isMaker bool
if orderData.Trades[x].LiquidityType == "Maker" {
isMaker = true
}
trades = append(trades, order.TradeHistory{
Price: orderData.Trades[x].Price,
Amount: orderData.Trades[x].Volume,
Fee: orderData.Trades[x].Fee,
Exchange: b.Name,
TID: strconv.FormatInt(orderData.Trades[x].TradeID, 10),
IsMaker: isMaker,
})
price = orderData.Trades[x].Price
originalAmount += orderData.Trades[x].Volume
}
oType, err := order.StringToOrderType(orderData.OrderType)
if err != nil {
b.Websocket.DataHandler <- order.ClassificationError{
Exchange: b.Name,
OrderID: orderID,
Err: err,
}
}
oSide, err := order.StringToOrderSide(orderData.Side)
if err != nil {
b.Websocket.DataHandler <- order.ClassificationError{
Exchange: b.Name,
OrderID: orderID,
Err: err,
}
}
oStatus, err := order.StringToOrderStatus(orderData.Status)
if err != nil {
b.Websocket.DataHandler <- order.ClassificationError{
Exchange: b.Name,
OrderID: orderID,
Err: err,
}
}
p, err := currency.NewPairFromString(orderData.MarketID)
if err != nil {
b.Websocket.DataHandler <- order.ClassificationError{
Exchange: b.Name,
OrderID: orderID,
Err: err,
}
}
b.Websocket.DataHandler <- &order.Detail{
Price: price,
Amount: originalAmount,
RemainingAmount: orderData.OpenVolume,
Exchange: b.Name,
ID: orderID,
ClientID: b.API.Credentials.ClientID,
Type: oType,
Side: oSide,
Status: oStatus,
AssetType: asset.Spot,
Date: orderData.Timestamp,
Trades: trades,
Pair: p,
}
case "error":
var wsErr WsError
err := json.Unmarshal(respRaw, &wsErr)
if err != nil {
return err
}
return fmt.Errorf("%v websocket error. Code: %v Message: %v", b.Name, wsErr.Code, wsErr.Message)
default:
b.Websocket.DataHandler <- stream.UnhandledMessageWarning{Message: b.Name + stream.UnhandledMessage + string(respRaw)}
return nil
}
return nil
}
func (b *BTCMarkets) generateDefaultSubscriptions() ([]stream.ChannelSubscription, error) {
var channels = []string{wsOB, tick, tradeEndPoint}
enabledCurrencies, err := b.GetEnabledPairs(asset.Spot)
if err != nil {
return nil, err
}
var subscriptions []stream.ChannelSubscription
for i := range channels {
for j := range enabledCurrencies {
subscriptions = append(subscriptions, stream.ChannelSubscription{
Channel: channels[i],
Currency: enabledCurrencies[j],
Asset: asset.Spot,
})
}
}
var authChannels = []string{fundChange, heartbeat, orderChange}
if b.Websocket.CanUseAuthenticatedEndpoints() {
for i := range authChannels {
subscriptions = append(subscriptions, stream.ChannelSubscription{
Channel: authChannels[i],
})
}
}
return subscriptions, nil
}
// Subscribe sends a websocket message to receive data from the channel
func (b *BTCMarkets) Subscribe(channelsToSubscribe []stream.ChannelSubscription) error {
var authChannels = []string{fundChange, heartbeat, orderChange}
var payload WsSubscribe
payload.MessageType = subscribe
for i := range channelsToSubscribe {
payload.Channels = append(payload.Channels,
channelsToSubscribe[i].Channel)
if channelsToSubscribe[i].Currency.String() != "" {
if !common.StringDataCompare(payload.MarketIDs,
channelsToSubscribe[i].Currency.String()) {
payload.MarketIDs = append(payload.MarketIDs,
channelsToSubscribe[i].Currency.String())
}
}
}
for i := range authChannels {
if !common.StringDataCompare(payload.Channels, authChannels[i]) {
continue
}
signTime := strconv.FormatInt(time.Now().UnixMilli(), 10)
strToSign := "/users/self/subscribe" + "\n" + signTime
tempSign, err := crypto.GetHMAC(crypto.HashSHA512,
[]byte(strToSign),
[]byte(b.API.Credentials.Secret))
if err != nil {
return err
}
sign := crypto.Base64Encode(tempSign)
payload.Key = b.API.Credentials.Key
payload.Signature = sign
payload.Timestamp = signTime
break
}
err := b.Websocket.Conn.SendJSONMessage(payload)
if err != nil {
return err
}
b.Websocket.AddSuccessfulSubscriptions(channelsToSubscribe...)
return nil
}