Get steam Offer on later stage

[mouzes1]

I am wondering how to get offer in later stage. Is there some call that I can make to retrieve offer based on offerId or something else? For example I want to Cancel specific offer at some point in time.
What i do now is to add all offers in array and get offer from array based on key(offerId) but when i restart my node.js i loose all offers in that array. 
Also is there something like Resend offer?

Thanks. 

Edited June 30, 2016 by mouzes1

[mouzes1]

Ok I found how to get offer I saw TradeOfferManager.prototype.getOffer, question for Resend offer still remains.

[Dr. McKay]

steam-tradeoffer-manager has a built-in option to automatically cancel offers if they remain active for too long. Look at the cancelTime option.

 

There's no direct resend method, but you can call offer.duplicate() to get a copy of the offer, which you can then send (provided the items still exist).