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GateIOScraper.go
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GateIOScraper.go
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package scrapers
import (
"encoding/json"
"errors"
"strconv"
"strings"
"sync"
"time"
"github.com/diadata-org/diadata/pkg/dia"
"github.com/diadata-org/diadata/pkg/dia/helpers"
models "github.com/diadata-org/diadata/pkg/model"
utils "github.com/diadata-org/diadata/pkg/utils"
ws "github.com/gorilla/websocket"
"github.com/zekroTJA/timedmap"
)
var _GateIOsocketurl string = "wss://api.gateio.ws/ws/v4/"
type GateIOTickerData struct {
Result string `json:"result"`
Data []GateIOCurrency `json:"data"`
}
type GateIOCurrency struct {
No int `json:"no"`
Symbol string `json:"symbol"`
Name string `json:"name"`
NameEn string `json:"name_en"`
NameCn string `json:"name_cn"`
Pair string `json:"pair"`
Rate string `json:"rate"`
VolA string `json:"vol_a"`
VolB string `json:"vol_b"`
CurrA string `json:"curr_a"`
CurrB string `json:"curr_b"`
CurrSuffix string `json:"curr_suffix"`
RatePercent string `json:"rate_percent"`
Trend string `json:"trend"`
Lq string `json:"lq"`
PRate int `json:"p_rate"`
}
type ResponseGate struct {
Method string `json:"method,omitempty"`
Params []interface{} `json:"params,omitempty"`
Id interface{} `json:"id,omitempty"`
}
type SubscribeGate struct {
Time int64 `json:"time"`
Channel string `json:"channel"`
Event string `json:"event"`
Payload []string `json:"payload"`
}
type GateIOScraper struct {
wsClient *ws.Conn
// signaling channels for session initialization and finishing
//initDone chan nothing
shutdown chan nothing
shutdownDone chan nothing
// error handling; to read error or closed, first acquire read lock
// only cleanup method should hold write lock
errorLock sync.RWMutex
error error
closed bool
// used to keep track of trading pairs that we subscribed to
pairScrapers map[string]*GateIOPairScraper
exchangeName string
chanTrades chan *dia.Trade
currencySymbolName map[string]string
isTickerMapInitialised bool
db *models.RelDB
}
// NewGateIOScraper returns a new GateIOScraper for the given pair
func NewGateIOScraper(exchange dia.Exchange, scrape bool, relDB *models.RelDB) *GateIOScraper {
s := &GateIOScraper{
shutdown: make(chan nothing),
shutdownDone: make(chan nothing),
pairScrapers: make(map[string]*GateIOPairScraper),
exchangeName: exchange.Name,
error: nil,
chanTrades: make(chan *dia.Trade),
currencySymbolName: make(map[string]string),
isTickerMapInitialised: false,
db: relDB,
}
var wsDialer ws.Dialer
SwConn, _, err := wsDialer.Dial(_GateIOsocketurl, nil)
if err != nil {
println(err.Error())
}
s.wsClient = SwConn
if scrape {
go s.mainLoop()
}
return s
}
type GateIPPairResponse []GateIOPair
type GateIOPair struct {
ID string `json:"id"`
Base string `json:"base"`
Quote string `json:"quote"`
Fee string `json:"fee"`
MinQuoteAmount string `json:"min_quote_amount,omitempty"`
AmountPrecision int `json:"amount_precision"`
Precision int `json:"precision"`
TradeStatus string `json:"trade_status"`
SellStart int `json:"sell_start"`
BuyStart int `json:"buy_start"`
MinBaseAmount string `json:"min_base_amount,omitempty"`
}
type GateIOResponseTrade struct {
Time int `json:"time"`
Channel string `json:"channel"`
Event string `json:"event"`
Result struct {
ID int `json:"id"`
CreateTime int `json:"create_time"`
CreateTimeMs string `json:"create_time_ms"`
Side string `json:"side"`
CurrencyPair string `json:"currency_pair"`
Amount string `json:"amount"`
Price string `json:"price"`
} `json:"result"`
}
// runs in a goroutine until s is closed
func (s *GateIOScraper) mainLoop() {
var gresponse GateIPPairResponse
tmFalseDuplicateTrades := timedmap.New(duplicateTradesScanFrequency)
tmDuplicateTrades := timedmap.New(duplicateTradesScanFrequency)
b, _, err := utils.GetRequest("https://api.gateio.ws/api/v4/spot/currency_pairs")
if err != nil {
log.Error(err)
}
err = json.Unmarshal(b, &gresponse)
if err != nil {
log.Error(err)
}
for _, v := range gresponse {
a := &SubscribeGate{
Event: "subscribe",
Time: time.Now().Unix(),
Channel: "spot.trades",
Payload: []string{v.ID},
}
log.Infof("Subscribed for Pair %v", v.ID)
if err = s.wsClient.WriteJSON(a); err != nil {
log.Error(err.Error())
}
}
for {
var message GateIOResponseTrade
if err = s.wsClient.ReadJSON(&message); err != nil {
log.Error(err.Error())
break
}
ps, ok := s.pairScrapers[message.Result.CurrencyPair]
if ok {
var f64Price float64
var f64Volume float64
var exchangepair dia.ExchangePair
f64Price, err = strconv.ParseFloat(message.Result.Price, 64)
if err != nil {
log.Errorln("error parsing float Price", err)
continue
}
f64Volume, err = strconv.ParseFloat(message.Result.Amount, 64)
if err != nil {
log.Errorln("error parsing float Price", err)
continue
}
if message.Result.Side == "sell" {
f64Volume = -f64Volume
}
exchangepair, err = s.db.GetExchangePairCache(s.exchangeName, message.Result.CurrencyPair)
if err != nil {
log.Error(err)
}
t := &dia.Trade{
Symbol: ps.pair.Symbol,
Pair: message.Result.CurrencyPair,
Price: f64Price,
Volume: f64Volume,
Time: time.Unix(int64(message.Result.CreateTime), 0),
ForeignTradeID: strconv.FormatInt(int64(message.Result.ID), 16),
Source: s.exchangeName,
VerifiedPair: exchangepair.Verified,
BaseToken: exchangepair.UnderlyingPair.BaseToken,
QuoteToken: exchangepair.UnderlyingPair.QuoteToken,
}
if exchangepair.Verified {
log.Infoln("Got verified trade", t)
}
// Handle duplicate trades.
discardTrade := t.IdentifyDuplicateFull(tmFalseDuplicateTrades, duplicateTradesMemory)
if !discardTrade {
t.IdentifyDuplicateTagset(tmDuplicateTrades, duplicateTradesMemory)
ps.parent.chanTrades <- t
}
}
}
s.cleanup(err)
}
func (s *GateIOScraper) cleanup(err error) {
s.errorLock.Lock()
defer s.errorLock.Unlock()
if err != nil {
s.error = err
}
s.closed = true
close(s.shutdownDone)
}
// Close closes any existing API connections, as well as channels of
// PairScrapers from calls to ScrapePair
func (s *GateIOScraper) Close() error {
if s.closed {
return errors.New("GateIOScraper: Already closed")
}
err := s.wsClient.Close()
if err != nil {
log.Error(err)
}
close(s.shutdown)
<-s.shutdownDone
s.errorLock.RLock()
defer s.errorLock.RUnlock()
return s.error
}
// ScrapePair returns a PairScraper that can be used to get trades for a single pair from
// this APIScraper
func (s *GateIOScraper) ScrapePair(pair dia.ExchangePair) (PairScraper, error) {
s.errorLock.RLock()
defer s.errorLock.RUnlock()
if s.error != nil {
return nil, s.error
}
if s.closed {
return nil, errors.New("GateIOScraper: Call ScrapePair on closed scraper")
}
ps := &GateIOPairScraper{
parent: s,
pair: pair,
}
s.pairScrapers[pair.ForeignName] = ps
return ps, nil
}
// func (s *GateIOScraper) normalizeSymbol(foreignName string, params ...interface{}) (symbol string, err error) {
// str := strings.Split(foreignName, "_")
// symbol = strings.ToUpper(str[0])
// if helpers.NameForSymbol(symbol) == symbol {
// if !helpers.SymbolIsName(symbol) {
// if symbol == "IOTA" {
// return "MIOTA", nil
// }
// return symbol, errors.New("Foreign name can not be normalized:" + foreignName + " symbol:" + symbol)
// }
// }
// if helpers.SymbolIsBlackListed(symbol) {
// return symbol, errors.New("Symbol is black listed:" + symbol)
// }
// return symbol, nil
// }
func (s *GateIOScraper) NormalizePair(pair dia.ExchangePair) (dia.ExchangePair, error) {
str := strings.Split(pair.ForeignName, "_")
symbol := strings.ToUpper(str[0])
pair.Symbol = symbol
if helpers.NameForSymbol(symbol) == symbol {
if !helpers.SymbolIsName(symbol) {
if symbol == "IOTA" {
pair.Symbol = "MIOTA"
}
return pair, errors.New("Foreign name can not be normalized:" + pair.ForeignName + " symbol:" + symbol)
}
}
if helpers.SymbolIsBlackListed(symbol) {
return pair, errors.New("Symbol is black listed:" + symbol)
}
return pair, nil
}
// FetchTickerData collects all available information on an asset traded on GateIO
func (s *GateIOScraper) FillSymbolData(symbol string) (asset dia.Asset, err error) {
// // Fetch Data
// if !s.isTickerMapInitialised {
// var (
// response GateIOTickerData
// data []byte
// )
// data, _, err = utils.GetRequest("https://data.gateapi.io/api2/1/marketlist")
// if err != nil {
// return
// }
// err = json.Unmarshal(data, &response)
// if err != nil {
// return
// }
// for _, gateioasset := range response.Data {
// s.currencySymbolName[gateioasset.Symbol] = gateioasset.Name
// }
// s.isTickerMapInitialised = true
// }
asset.Symbol = symbol
// asset.Name = s.currencySymbolName[symbol]
return asset, nil
}
// FetchAvailablePairs returns a list with all available trade pairs
func (s *GateIOScraper) FetchAvailablePairs() (pairs []dia.ExchangePair, err error) {
data, _, err := utils.GetRequest("https://data.gate.io/api2/1/pairs")
if err != nil {
return
}
ls := strings.Split(strings.Replace(string(data)[1:len(data)-1], "\"", "", -1), ",")
for _, p := range ls {
pairToNormalize := dia.ExchangePair{
Symbol: "",
ForeignName: p,
Exchange: s.exchangeName,
}
pair, serr := s.NormalizePair(pairToNormalize)
if serr == nil {
pairs = append(pairs, pair)
} else {
log.Error(serr)
}
}
return
}
// GateIOPairScraper implements PairScraper for GateIO
type GateIOPairScraper struct {
parent *GateIOScraper
pair dia.ExchangePair
closed bool
}
// Close stops listening for trades of the pair associated with s
func (ps *GateIOPairScraper) Close() error {
ps.closed = true
return nil
}
// Channel returns a channel that can be used to receive trades
func (ps *GateIOScraper) Channel() chan *dia.Trade {
return ps.chanTrades
}
// Error returns an error when the channel Channel() is closed
// and nil otherwise
func (ps *GateIOPairScraper) Error() error {
s := ps.parent
s.errorLock.RLock()
defer s.errorLock.RUnlock()
return s.error
}
// Pair returns the pair this scraper is subscribed to
func (ps *GateIOPairScraper) Pair() dia.ExchangePair {
return ps.pair
}