Get bnb price from binance instead of 0x

relay/pkg/price/price.go

@@ -1,6 +1,10 @@
 package price
 
 import (
+	"encoding/json"
+	"math"
+	"net/http"
+
 	"github.com/ethereum/go-ethereum/common"
 )
 
@@ -16,9 +20,35 @@ func TokenToUSD(token *TokenInfo) (price float64, err error) {
 		price, err = GetAmb()
 	} else if token.Symbol == "USDT" || token.Symbol == "BUSD" {
 		price, err = GetKucoin(token)
+	} else if token.Symbol == "WBNB" {
+		price, err = GetWBNB(token)
 	} else {
 		price, err = Get0x(token)
 	}
 
 	return price, err
 }
+
+func GetWBNB(token *TokenInfo) (price float64, err error) {
+	amount := math.Pow10(int(token.Decimals))
+
+	client := http.Client{}
+
+	req, err := http.NewRequest("GET", "https://api.binance.com/api/v1/ticker/price?symbol=BNBUSDT", nil)
+	if err != nil {
+		return 0, err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return 0, err
+	}
+	defer resp.Body.Close()
+
+	var r response
+	if err := json.NewDecoder(resp.Body).Decode(&r); err != nil {
+		return 0, err
+	}
+
+	return r.Price / amount, err
+}