We cant find an addon which shows a BUY NOW button which adds the product to the cart and takes the customer directly to the checkout page so that he can either login ( if unregistered or not logged in ) or Select the Shipping Method ( if logged in ) and Pay for the order. Does any 1 have this ?
The addons available are very misleading since they say buy now with 1 click but its a call back feature where mobile number is taken.
Are you wanting this to apply to all "add to cart" buttons? Or are you wanting a separate button that will do this for selective placement?
If the latter, there's more than just creating a button and the supporting controller. You would have to identify where you want this button and if it's going to be something like product dependent or other conditions, then you'd have to take those conditions into account.
If you simply want an additional button on the products.details page, then that's pretty straight-forward and can be done within your my_changes addon.
We've published a free my_changes checkout.pre controller that will support direct adds to cart/direct to checkout. This controller is mostly used when coming from remote sites via a s link. It would then become an exercise to implement a new button that would call the controller with the appropriate modes/parameters for the behaviors you want.