<filter name="submit_payment" module="epay" act="procEpayDoPayment">
    <form />
    <parameter />
    <response callback_func="completeSubmitPayment">
        <tag name="error" />
        <tag name="message" />
        <tag name="order_srl" />
        <tag name="return_url" />
    </response>
</filter>
