Cancel URL gets rewritten by payment gateway

I'm am working on a payment plugin for a Swedish payment service.

At the moment I'm getting rejected because of having wrong merchant_id but the return url gets rewritten by the payment gateway. This resulting in getting back to a webshop category page.

The Cancel URL in the code is the one you suggest and it is following along with the outgoing call.

It seem that the gateway starts to write its own stuff after the first ampersand. They seem to use ampersands as separators in the URL-code.

Is it possible to use a SEF url in the code?

Jan

I got it solved by chaging the code so that Ampersands are written urlencoded; %26.

Like this:

$return_url = HIKASHOP_LIVE.'index.php?option=com_hikashop%26ctrl=checkout%26task=after_end%26order_id='.$order->order_id.$url_itemid;