I'm thinking of using Exp:resso Store for my client's site, and I'm thinking of using PayPal Express Checkout as the payment gateway. Can anyone please shed some light on how these two work together?
Where do I enter my API Signature so Store can connect to PayPal?
What details do I have to send to PayPal?
Do users have to log in to a PayPal account before they can confirm their purchase?
Thanks in advance, sorry for being clueless!