code: public function notify(PayNotifyInterface $notify)
      {
          if (! $this->notify instanceof NotifyStrategy) {
              throw new PayException('请检查初始化是否正确');
          }
  
          return $this->notify->handle($notify);
      }
docs: 通过环境类调用支付异步通知
  
  @param PayNotifyInterface $notify
  @return array
  @throws PayException
  @author helei