Google Checkout, OpenId, and downloadable products

Question

I going to use Google Checkout to process orders to purchase downloadable content. When the order process is completed via Google Checkout I'd like for the user to be able come back to my site, authenticate using their Google credentials (OpenID?) that they purchased the item with linked back end, and download the goods. The site is written using C# and ASP.NET MVC.

Is this possible or how should I rethink this? Are there open-source libraries to get me started?

Answer 1

I don't know anything about Google Checkout, but I know that No.1 library for OpenId is DotNetOpenAuth.

See project project home page, authors blog or search stackoverflow for details. There are also examples in the library download to get you started.

Cheers!