private function discoverOrderIdByRecurring($recurring_payment_id)
	{
		$db = JFactory::getDbo();
		$query = $db->getQuery(true);
		$payment_params_regex = $db->escape('%"recurring_payment_id":"' . $recurring_payment_id . '"%');
		$query->select('id')
			->from($db->quoteName('#__djc2_orders'))
			->where($db->quoteName('payment_params') . ' LIKE ' . $db->quote($payment_params_regex));

		$db->setQuery($query);
		return $db->loadResult();
	}