Method getPaymentMethod

public function getPaymentMethod($paymentId)
{
    //$paramsC 				= PhocacartUtils::getComponentParameters();
    //$shipping_amount_rule	= $paramsC->get( 'shipping_amount_rule', 0 );
    $db = Factory::getDBO();
    /*$query = ' SELECT p.id, p.title, p.image,'
    				.' FROM #__phocacart_payment_methods AS s'
    				.' WHERE p.id = '.(int)$paymentId
    				.' LIMIT 1';
    		$db->setQuery($query);*/
    $query = ' SELECT p.id, p.tax_id, p.cost, p.cost_additional, p.calculation_type, p.title, p.image, p.method, p.params, p.description, ' . ' t.id as taxid, t.title as taxtitle, t.tax_rate as taxrate, t.calculation_type as taxcalculationtype' . ' FROM #__phocacart_payment_methods AS p' . ' LEFT JOIN #__phocacart_taxes AS t ON t.id = p.tax_id' . ' WHERE p.id = ' . (int) $paymentId . ' ORDER BY p.id' . ' LIMIT 1';
    $db->setQuery($query);
    $payment = $db->loadObject();
    if (isset($payment->params)) {
        $registry = new Registry();
        //$registry->loadString($payment->params);
        if (isset($payment->params)) {
            $registry->loadString($payment->params);
        }
        $payment->params = $registry;
        //$payment->paramsArray = $registry->toArray();
    }
    return $payment;
}