How to promissify a class with bluebird in node?

Question

Node.js

I am looking for a way to do synchronous operations in node. Many praise the bluebird module. I found a note on github, and I can’t understand why bluebird is here, if you could get by with the usual built-in Promise, because it will work the same way?
And yet, tell me how to properly promissify the class? Force each method to return a promise, or is it possible to somehow wrap everything at once through bluebird? Because it doesn't come out right.