client := NewWeChatClient(AppID, MchID, false)
//请求支付,成功后得到结果
* 发起统一下单请求
* param:统一下单请求参数
> 请求成后,获取下单结果
```go
wxRsp, err := client.GoUnifiedOrder(params)
if err != nil {
fmt.Println("Error:", err)
} else {
fmt.Println("ReturnCode:", wxRsp.ReturnCode)
fmt.Println("ReturnMsg:", wxRsp.ReturnMsg)
fmt.Println("Appid:", wxRsp.Appid)
fmt.Println("MchId:", wxRsp.MchId)
fmt.Println("DeviceInfo:", wxRsp.DeviceInfo)
fmt.Println("NonceStr:", wxRsp.NonceStr)
fmt.Println("Sign:", wxRsp.Sign)
fmt.Println("ResultCode:", wxRsp.ResultCode)
fmt.Println("PrepayId:", wxRsp.PrepayId)
fmt.Println("TradeType:", wxRsp.TradeType)
}