退款通知验证有问题

[wcj343169893]

从官方文档可以看出，异步通知的参数中，并没有签名参数，只需要对req_info解密即可。
但是在代码中发现
`if (isset($data['sign']) && $data['sign'] && $sign === $data['sign']) {
$responseData['sign_match'] = true;
} else {
$responseData['sign_match'] = false;
}

    if ($responseData['sign_match'] && isset($data['refund_status']) && $data['refund_status'] == 'SUCCESS') {
        $responseData['refunded'] = true;
    } else {
        $responseData['refunded'] = false;
    }`

$data['sign']是不存在的，所以在前面调用response的data，sign_match一定是false，refunded也是false
@lokielse 如果有空看看吧，现在我用的是1.x