add LocalSymbol field for exchange specific symbol

pkg/exchange/binance/exchange.go

@@ -122,6 +122,7 @@ func (e *Exchange) QueryMarkets(ctx context.Context) (types.MarketMap, error) {
 	for _, symbol := range exchangeInfo.Symbols {
 		market := types.Market{
 			Symbol:          symbol.Symbol,
+			LocalSymbol:     symbol.Symbol,
 			PricePrecision:  symbol.QuotePrecision,
 			VolumePrecision: symbol.BaseAssetPrecision,
 			QuoteCurrency:   symbol.QuoteAsset,

pkg/exchange/ftx/exchange.go

@@ -105,7 +105,9 @@ func (e *Exchange) QueryMarkets(ctx context.Context) (types.MarketMap, error) {
 		symbolMap[symbol] = m.Name
 
 		market := types.Market{
-			Symbol: symbol,
+			Symbol:      symbol,
+			LocalSymbol: m.Name,
+		
 			// The max precision is length(DefaultPow). For example, currently fixedpoint.DefaultPow
 			// is 1e8, so the max precision will be 8.
 			PricePrecision:  fixedpoint.NumFractionalDigits(fixedpoint.NewFromFloat(m.PriceIncrement)),

pkg/exchange/max/exchange.go

@@ -128,6 +128,7 @@ func (e *Exchange) QueryMarkets(ctx context.Context) (types.MarketMap, error) {
 
 		market := types.Market{
 			Symbol:          symbol,
+			LocalSymbol:     m.ID,
 			PricePrecision:  m.QuoteUnitPrecision,
 			VolumePrecision: m.BaseUnitPrecision,
 			QuoteCurrency:   toGlobalCurrency(m.QuoteUnit),

pkg/exchange/okex/exchange.go

@@ -9,6 +9,9 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+// OKB is the platform currency of OKEx, pre-allocate static string here
+const OKB = "OKB"
+
 var log = logrus.WithFields(logrus.Fields{
 	"exchange": "okex",
 })
@@ -47,7 +50,9 @@ func (e *Exchange) QueryMarkets(ctx context.Context) (types.MarketMap, error) {
 	for _, instrument := range instruments {
 		symbol := toGlobalSymbol(instrument.InstrumentID)
 		market := types.Market{
-			Symbol:        symbol,
+			Symbol:      symbol,
+			LocalSymbol: instrument.InstrumentID,
+
 			QuoteCurrency: instrument.QuoteCurrency,
 			BaseCurrency:  instrument.BaseCurrency,
 
@@ -83,5 +88,5 @@ func (e *Exchange) QueryTickers(ctx context.Context, symbol string) (*types.Tick
 }
 
 func (e *Exchange) PlatformFeeCurrency() string {
-	return "OKB"
+	return OKB
 }

pkg/types/market.go

@@ -47,7 +47,9 @@ func (d *Duration) UnmarshalJSON(data []byte) error {
 }
 
 type Market struct {
-	Symbol          string
+	Symbol      string
+	LocalSymbol string // LocalSymbol is used for exchange's API
+
 	PricePrecision  int
 	VolumePrecision int
 	QuoteCurrency   string