You don't need to refactor the existing code. You can change the calling code. // Promisifying a standard callback const myAsyncMethod = Bluebird.promi

You don't need to refactor the existing code. You can change the calling code. // Promisifying a standard callback const myAsyncMethod = Bluebird.promisify(myCallbackMethod); // Or if you have weird callback passing and need // to manipulate the callback method being passed around function myAsyncMethod(...args) { return Bluebird.fromCallback(cb => myAsyncMethod(cb, ...args)); }