Extend RPC-Handler class using Ethers

[Keyrxng]

          > Do you feel it'd be better/cleaner to extend the `BaseProvider` and create our own? I hadn't looked into it but assumed we'd need to rewrite encode/decode or at least some logic and didn't think that was ideal but if we open a task for it I'd be happy to look into it unless someone else wants to.

It sounds like it's cleaner to extend BaseProvider but I'm not sure how much work is that and how much abstraction we lose, maybe extending JsonRpcProvider could be another option

Originally posted by @whilefoo in #56 (comment)