Swappable hash alogirithm for DHT keys?

[jMyles]

What's the feasibility of making the SHA1 algorithm swappable so that users can implement, for example, BLAKE2?

I know that SHA1 is in the "basic kademlia" spec, but it doesn't look to me like using BLAKE2 will break anything, and for our purposes, we'd like to make it more difficult to create collisions.

[bmuller]

Hey @jMyles - my thoughts here are pretty much the same as for all extensibility requests. I'd like the lib to provide an implementation of the kademlia spec by default, but be highly extensible so that it can be used as a base for all kinds of different applications. Some thoughts around how the current code could be modified to specifically support a different hash function -

1. I think this could be done by adding a class method to Node for digesting
2. You could have a NodeFactory class that makes Nodes that is set in Server

Might take some refactoring, but I'm happy to look at any PRs or talk though implementation options before any work starts