move exchange and order struct to the bbgo package

bbgo/binance_exchange.go

@@ -0,0 +1,31 @@
+package bbgo
+
+import (
+	"context"
+	"github.com/adshao/go-binance"
+	"github.com/sirupsen/logrus"
+)
+
+type BinanceExchange struct {
+	Client *binance.Client
+}
+
+func (e *BinanceExchange) SubmitOrder(ctx context.Context, order Order) error {
+	req := e.Client.NewCreateOrderService().
+		Symbol(order.Symbol).
+		Side(order.Side).
+		Type(order.Type).
+		Quantity(order.VolumeStr)
+
+	if len(order.PriceStr) > 0 {
+		req.Price(order.PriceStr)
+	}
+	if len(order.TimeInForce) > 0 {
+		req.TimeInForce(order.TimeInForce)
+	}
+
+	retOrder, err := req.Do(ctx)
+	logrus.Infof("order created: %+v", retOrder)
+	return err
+}
+

bbgo/order.go

@@ -0,0 +1,14 @@
+package bbgo
+
+import "github.com/adshao/go-binance"
+
+type Order struct {
+	Symbol    string
+	Side      binance.SideType
+	Type      binance.OrderType
+	VolumeStr string
+	PriceStr  string
+
+	TimeInForce binance.TimeInForceType
+}
+