помогите настроить модуль оплаты...

    function process_button() {
      global $customer_id, $order, $sendto, $osPrice, $currencies, $cart_prochange_id, $shipping;

      $process_button_string = '';

    $order_sum = $order->info['total'];

      $process_button_string = os_draw_hidden_field('PRO_FIELD_1', substr($cart_prochange_id, strpos($cart_prochange_id, '-')+1)) .
                              os_draw_hidden_field('PRO_CLIENT', MODULE_PAYMENT_PROCHANGE_MERCHANT_PRO_CLIENT) .
                              os_draw_hidden_field('PRO_RA', MODULE_PAYMENT_PROCHANGE_MERCHANT_PRO_RA) .
                              os_draw_hidden_field('PRO_PAYMENT_DESC', substr($_SESSION['cart_prochange_id'], strpos($_SESSION['cart_prochange_id'], '-')+1)) .
                              os_draw_hidden_field('PRO_SUMMA', $order_sum);

      return $process_button_string;
    }

<input type="hidden" name="*scart">
<input type="hidden" name="wsb_version" value="2">
<input type="hidden" name="wsb_language_id" value="rusian">
<input type="hidden" name="wsb_storeid" value="11111111">
<input type="hidden" name="wsb_store" value="Название вашего магазина">
<input type="hidden" name="wsb_order_num" value="ORDER-12345678">
<input type="hidden" name="wsb_test" value="1">
<input type="hidden" name="wsb_currency_id" value="BYR">
<input type="hidden" name="wsb_seed" value="1242649174">
<input type="hidden" name="wsb_return_url" value="http://your site url.com/success.php">
<input type="hidden" name="wsb_cancel_return_url" value="http://your site url.com/cancel.php">
<input type="hidden" name="wsb_notify_url" value="http://your site url.com/notify.php">
<input type="hidden" name="wsb_email" value="no@body.tld">
<input type="hidden" name="wsb_phone" value="22-333-333">
<input type="hidden" name="wsb_invoice_item_name[]" value="Товар 1">
<input type="hidden" name="wsb_invoice_item_quantity[]" value="2">
<input type="hidden" name="wsb_invoice_item_price[]" value="10000">
<input type="hidden" name="wsb_invoice_item_name[]" value="Товар 2">
<input type="hidden" name="wsb_invoice_item_quantity[]" value="1">
<input type="hidden" name="wsb_invoice_item_price[]" value="500">
<input type="hidden" name="wsb_total" value="21950">
<input type="hidden" name="wsb_signature" value="40aa8af3ce7a1f7c3635ac2227475094a59d574c">
<input type="hidden" name="wsb_tax" value="1050">
<input type="hidden" name="wsb_shipping_name" value="Стоимость доставки">
<input type="hidden" name="wsb_shipping_price " value="980">
<input type="hidden" name="wsb_discount_name" value="Скидка на товар">
<input type="hidden" name="wsb_discount_price" value="580">
<input type="sumbit" value="Купить">

function process_button() {
      global $customer_id, $order, $sendto, $osPrice, $currencies, $cart_webtopay_id, $shipping;

      $process_button_string = '';

      $order_sum = $order->info['total'];
 
      $process_button_string =  os_draw_hidden_field('*scart') .
os_draw_hidden_field('wsb_version', '2') .
os_draw_hidden_field('wsb_language_id', 'rusian') .
os_draw_hidden_field('wsb_storeid', '796909321') .
os_draw_hidden_field('wsb_store', 'WEBPAY Merchant') .
os_draw_hidden_field('wsb_order_num', 'ORDER-12345678') .
os_draw_hidden_field('wsb_test', '1') .
os_draw_hidden_field('wsb_currency_id', 'BYR') .
os_draw_hidden_field('wsb_seed', '1242649174') .
os_draw_hidden_field('wsb_return_url', os_href_link('http://your site url.com/success.php') .
os_draw_hidden_field('wsb_cancel_return_url', os_href_link('http://your site url.com/cancel.php') .
os_draw_hidden_field('wsb_notify_url', os_href_link('http://your site url.com/notify.php') .
os_draw_hidden_field('wsb_email', os_href_link('no@body.tld') .
os_draw_hidden_field('wsb_phone', '22-333-333') .
os_draw_hidden_field('wsb_invoice_item_name[]', 'Товар 1') .
os_draw_hidden_field('wsb_invoice_item_quantity[]', '2') .
os_draw_hidden_field('wsb_invoice_item_price[]', '10000') .
os_draw_hidden_field('wsb_total', '21950') .
os_draw_hidden_field('wsb_signature', '0aa8af3ce7a1f7c3635ac2227475094a59d574c') .
os_draw_hidden_field('wsb_tax', '1050') .
os_draw_hidden_field('wsb_shipping_name', 'Стоимость доставки') .
os_draw_hidden_field('wsb_shipping_price', '0') .
os_draw_hidden_field('wsb_discount_name', 'Скидка на товар') .
os_draw_hidden_field('wsb_discount_price', '580') .
                os_draw_hidden_field('sumbit', 'Купить') ;

      return $process_button_string;
    }