public function completeOrder($transactionReference = null)
{
if ($transactionReference) {
$this->setTransactionReference($transactionReference);
$this->save();
}
//in case of external payment hitting, update the status.
//otherwise nothing should really happen.
$this->updateStatus();
$this->dispatchEmailNotifications();
StoreCustomer::addCustomerToUserGroupsByOrder($this);
$event = new StoreOrderEvent($this);
Events::dispatch('on_vividstore_order', $event);
// unset the shipping type, as next order might be unshippable
\Session::set('smID', '');
StoreCart::clear();
return $this;
}