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poloniex_websocket.go
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poloniex_websocket.go
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package poloniex
import (
"log"
"strconv"
"github.com/beatgammit/turnpike"
)
const (
poloniexWebsocketAddress = "wss://api.poloniex.com"
poloniexWebsocketRealm = "realm1"
poloniexWebsocketTicker = "ticker"
poloniexWebsocketTrollbox = "trollbox"
)
// OnTicker converts ticker data to a websocketTicker
func OnTicker(args []interface{}, kwargs map[string]interface{}) {
ticker := WebsocketTicker{}
ticker.CurrencyPair = args[0].(string)
ticker.Last, _ = strconv.ParseFloat(args[1].(string), 64)
ticker.LowestAsk, _ = strconv.ParseFloat(args[2].(string), 64)
ticker.HighestBid, _ = strconv.ParseFloat(args[3].(string), 64)
ticker.PercentChange, _ = strconv.ParseFloat(args[4].(string), 64)
ticker.BaseVolume, _ = strconv.ParseFloat(args[5].(string), 64)
ticker.QuoteVolume, _ = strconv.ParseFloat(args[6].(string), 64)
if args[7].(float64) != 0 {
ticker.IsFrozen = true
} else {
ticker.IsFrozen = false
}
ticker.High, _ = strconv.ParseFloat(args[8].(string), 64)
ticker.Low, _ = strconv.ParseFloat(args[9].(string), 64)
}
// OnTrollbox handles trollbox messages
func OnTrollbox(args []interface{}, kwargs map[string]interface{}) {
message := WebsocketTrollboxMessage{}
message.MessageNumber, _ = args[1].(float64)
message.Username = args[2].(string)
message.Message = args[3].(string)
if len(args) == 5 {
message.Reputation = args[4].(float64)
}
}
// OnDepthOrTrade handles orderbook depth and trade events
func OnDepthOrTrade(args []interface{}, kwargs map[string]interface{}) {
for x := range args {
data := args[x].(map[string]interface{})
msgData := data["data"].(map[string]interface{})
msgType := data["type"].(string)
switch msgType {
case "orderBookModify":
{
type PoloniexWebsocketOrderbookModify struct {
Type string
Rate float64
Amount float64
}
orderModify := PoloniexWebsocketOrderbookModify{}
orderModify.Type = msgData["type"].(string)
rateStr := msgData["rate"].(string)
orderModify.Rate, _ = strconv.ParseFloat(rateStr, 64)
amountStr := msgData["amount"].(string)
orderModify.Amount, _ = strconv.ParseFloat(amountStr, 64)
}
case "orderBookRemove":
{
type PoloniexWebsocketOrderbookRemove struct {
Type string
Rate float64
}
orderRemoval := PoloniexWebsocketOrderbookRemove{}
orderRemoval.Type = msgData["type"].(string)
rateStr := msgData["rate"].(string)
orderRemoval.Rate, _ = strconv.ParseFloat(rateStr, 64)
}
case "newTrade":
{
type PoloniexWebsocketNewTrade struct {
Type string
TradeID int64
Rate float64
Amount float64
Date string
Total float64
}
trade := PoloniexWebsocketNewTrade{}
trade.Type = msgData["type"].(string)
tradeIDstr := msgData["tradeID"].(string)
trade.TradeID, _ = strconv.ParseInt(tradeIDstr, 10, 64)
rateStr := msgData["rate"].(string)
trade.Rate, _ = strconv.ParseFloat(rateStr, 64)
amountStr := msgData["amount"].(string)
trade.Amount, _ = strconv.ParseFloat(amountStr, 64)
totalStr := msgData["total"].(string)
trade.Rate, _ = strconv.ParseFloat(totalStr, 64)
trade.Date = msgData["date"].(string)
}
}
}
}
// WebsocketClient creates a new websocket client
func (p *Poloniex) WebsocketClient() {
for p.Enabled && p.Websocket {
c, err := turnpike.NewWebsocketClient(turnpike.JSON, poloniexWebsocketAddress, nil)
if err != nil {
log.Printf("%s Unable to connect to Websocket. Error: %s\n", p.GetName(), err)
continue
}
if p.Verbose {
log.Printf("%s Connected to Websocket.\n", p.GetName())
}
_, err = c.JoinRealm(poloniexWebsocketRealm, nil)
if err != nil {
log.Printf("%s Unable to join realm. Error: %s\n", p.GetName(), err)
continue
}
if p.Verbose {
log.Printf("%s Joined Websocket realm.\n", p.GetName())
}
c.ReceiveDone = make(chan bool)
if err := c.Subscribe(poloniexWebsocketTicker, OnTicker); err != nil {
log.Printf("%s Error subscribing to ticker channel: %s\n", p.GetName(), err)
}
if err := c.Subscribe(poloniexWebsocketTrollbox, OnTrollbox); err != nil {
log.Printf("%s Error subscribing to trollbox channel: %s\n", p.GetName(), err)
}
for x := range p.EnabledPairs {
currency := p.EnabledPairs[x]
if err := c.Subscribe(currency, OnDepthOrTrade); err != nil {
log.Printf("%s Error subscribing to %s channel: %s\n", p.GetName(), currency, err)
}
}
if p.Verbose {
log.Printf("%s Subscribed to websocket channels.\n", p.GetName())
}
<-c.ReceiveDone
log.Printf("%s Websocket client disconnected.\n", p.GetName())
}
}