amazon checkout on joomla virtuemart

Implement the amazon checkout button on the joomla/virtuemart environment, reusing all the code from other gateways like paypal to optimize coding. It most include the amazon code sample to develop the dynamic hashing for every product mounted on virtuemart. He/she has to take into account that the cart can have multiple products to checkout. The return page from amazon to the site most be compatible with the rules of virtuemart. Amazon has a "sandbox" for testing purposes. The goal is: 1. CODER: Deliver the code. 2. ME: make a test in a website to be defined. 3. CODER: Deliver recommendations for production environment. ## Deliverables amazon sandbox: <[login to view URL]> Amazon Simple Pay Guides: <[login to view URL]> <[login to view URL]> Specific Dynamic button documentation: <[login to view URL]> Amazon button type to use: standard. The .zip file attached? contains the sample PHP Code published in [login to view URL] that can be used to deliver the project. But not necessarily need to be equal. The deliverable has to be in a format compatible with virtuemart, i.e. the suggested method is HTML form class, with instructions for its installation. The recommendations have to be focused on the hashing algorithm and other security issues: access control, encryption, backup, etc.