Omnipay\Alipay\Requests\LegacyExpressPurchaseRequest::getData PHP Метод

    public function getData()
    {
        $this->validateParams();
        $data = $this->filter($this->parameters->all());
        $data['service'] = $this->service;
        $data['sign'] = $this->sign($data, $this->getSignType());
        $data['sign_type'] = $this->getSignType();
        return $data;
    }