Does facebook-accounts and facebook use oauth2 or oauth protocol?

I am trying to build a stocktwits oauth 2 package which I will post to atmosphere when it is polished up :slight_smile: Before I set out on this journey, I am looking to use an existing meteor oauth2 package as my model. facebook and facebook-ui seem like good ones to use as my skeleton which I am browsing here: I notice that the facebook package has oauth2 as a dependency. So my main question is the following, is the existing facebook, accounts-facebook packages based in oauth2 ??? Bc this would serve as a great starting point for the stocktwits oauth integration I need to make!

Thanks in advance for your help.