Omnipay\WechatPay\Message\CreateOrderResponse::getJSOrderData PHP Method

    public function getJSOrderData()
    {
        if ($this->isSuccessful()) {
            $data = array('appId' => $this->request->getAppId(), 'package' => 'prepay_id=' . $this->getPrepayId(), 'nonceStr' => md5(uniqid()), 'timeStamp' => time());
            $data['signType'] = 'MD5';
            $data['paySign'] = Helper::sign($data, $this->request->getApiKey());
        } else {
            $data = null;
        }
        return $data;
    }