/**
  * Start payment
  *
  * @param       $cart
  * @param       $order
  *
  * @return      bool|null
  */
 public function plgVmConfirmedOrder(VirtueMartCart $cart, array $order)
 {
     $config = $this->getVmPluginMethod($cart->virtuemart_paymentmethod_id);
     $address = $this->getAddress($order);
     if (!$config || !$this->selectedThisElement($config->payment_element)) {
         return null;
         // Another method was selected, do nothing
     }
     try {
         $response = $this->getPaynetProcessorAggregate($config)->startSale($address, $this->getReturnUrl($address));
     } catch (Exception $e) {
         $this->logException($e);
         $this->saveAddress($address);
         $this->cancelOrder($address, $config);
         JRequest::setVar('html', $this->getErrorMessage(), 'post');
         return;
     }
     $this->saveAddress($address);
     $cart->_confirmDone = false;
     $cart->_dataValidated = false;
     $cart->setCartIntoSession();
     JFactory::getApplication()->redirect($response->getRedirectUrl());
 }