update, i am using this to show the image and image id, i need something like this to show the URL:
echo $product->get_image();
echo $product->get_image_id();
Incidently, I followed the FAQ, where it states it needs to be a standalone plugin, which is fine. however, adding the following:
https://ww.wp.xz.cn/plugins/jigoshop-custom-payment-gateway/installation/
It is added to the plugins directory, I can see it in plugins, but still not showing up in payment gateways.