Add Timeout For RPC Calls

[Rishi556]

RPC calls that take longer than an arbitrary number of ms(defined in config) should be killed and the mongo query killed too with a request took too long error message

[klyed]

I can add a TIMEOUT=x to the .env and use 'dotenv' module to pull it into the libraries and likely can achieve this..
(I think the newest version of NodeJS actually incorporates a way to import .env variables without 'dotenv' module?)

The architecture needs some refactoring in order to achieve this.. But I think it's possible to do in a short time frame.
Let me know if you'd like me to have a whack at this.. I've read most of the HE code base and have some idea of how this would be achieved.. I'm already a top 20 HE witness so achieving this would be a way to give back to a community that has voted me into a position where the node pays for itself.

As for the mongoDB edits I think with some work it's doable.. by default MongoDB will timeout a call to itself in 60 seconds if the query doesn't return a callback or data.. It may be possible to programmatically tie into the existing timeout in MongoDB and leverage that.

[klyed]

FFound out how to do the mongoDB timeout... The syntax is as follows:

db.collection.find(
{ <query> },
{ <projection> }
).maxTimeMS( <milliseconds> )

I can start refactoring the codebase if you want.. as for the API timeout I'll have to look at the architecture and figure out the best method.