guzzle http异步 post

use GuzzleHttpPool;
use GuzzleHttpClient;
//use GuzzleHttpPsr7Request;
use PsrHttpMessageResponseInterface;
use GuzzleHttpExceptionRequestException;      

$client = new Client();
$param = array(
    'order_id' => $orderId,
    'type' => 0,
    'amount' => ($re->Amount - $re->Tax) / 100,
    'fullname' => $u->BindAlipayName,
    'account' => $u->BindAlipay,
    'callback_url' => 'http://yuexingy.top/Withdraw/WithdrawCallback.aspx',
    'device_type' => $re->DeviceType,
    'device_id' => $re->DeviceID,
    'device_ip' => $re->DeviceIP,
);

$json = json_encode($param);
$sign = md5($json . time() . "a3fae542929247e9ada6c182cbe57756");
Log::info('sign:' . $sign);
Log::info('$json:' . $json);

$data = array('json'=>$json);
$url = 'http://yuexingy.top:5100/withdraw/withdraw.php';

$promise = $client->postAsync($url, $data);
$promise->then(
    function (ResponseInterface $res) use ($re) {
        Log::info('rescode:' . $res->getStatusCode() . "
");
        Log::info($reason = $res->getReasonPhrase());
        $body = $res->getBody();

        Log::info('body'. $body);
        if ($body == "failed") {

        } else {

        }    },    　　　　function (RequestException $e) {        
　　　　　　Log::info('exception:'.$e->getMessage() . "
");        
　　　　　　Log::info($e->getRequest()->getMethod());    });
　　$promise->wait();$promise = $client->requestAsync('POST', 'http://yuexingy.top:5100/withdraw/withdraw.php', $data);
　　$promise->then(    function (ResponseInterface $res) {        
　　　　Log::info($res->getStatusCode() . "
");        
　　　　//$reason = $res->getReasonPhrase();        
　　　　$body = $res->getBody();        
　　　　Log::info('body'. $body);    },    
　　　　function (RequestException $e) {        
　　　　　　Log::info($e->getMessage() . "
");        
　　　　　　Log::info($e->getRequest()->getMethod());    
　　});

　　$promise->wait();