I made a web site with products and i would like to complete the payment with paypal. I have this problem. When the use want to complete and buy something before continue to the paypal should check if it is available and reserve the prodoct. With the paypal he will redirect to the paypal to buy. How i will know if the user did not pay so i will be able to make the product available and not reserved? If the payment is completed then i do not have problem but otherwise? I am using jsp to make my site
Thank you very much for your help.