添加利率接口

wholesale/setting/rate.go

@@ -25,6 +25,16 @@ func (r *rate) All(ctx context.Context) (result []RateItem, err error) {
 	return
 }
 
+// Get @Title 获取利率信息
+func (r *rate) Get(ctx context.Context, rateId uint) (result RateItem, err error) {
+	xClient, err := client.GetClient(r)
+	if err != nil {
+		return
+	}
+	err = xClient.Call(ctx, "Get", rateId, &result)
+	return
+}
+
 type ArgsRateChannel struct {
 	ChannelId uint // 渠道id
 	RateId    uint // 费率id