Hello,
I would like to add a smart button to my cart/checkout so my customer will be able to pay with credit card even if he/she does not have a paypal account. So I will need to get the total amount (including shipping cost) and items from the cart.
See below a picture of what I am looking for. Please note I have zero experience with HTML page code (no idea how to change this in order to use the function postMessage for instance) so please be nice 
Thank you in advance.
For reference: www.lecod.com.br
