NodeJS best practices with Promises

I am developing a new library above amqp.node (amqplib), basically we dont need all the RabbitMQ functionality. So, I am creating a simple library that facilitates the usage specifically for our project.

This new library will return Promises. So, for example, subscribing to a queue will return a Promise about Ok and Error. But, what should I do with later issues? Disconnect, reconnect, Queue deleted, etc, etc? This will happen after the promise has been resolve. Should my new class emit his own errors? Is this a good way of working with promises?