Resolve DIDDocument from cached events

[nichonien]

Hi Team,

The did resolution to DIDDocument takes blockchain interaction to execute and sometimes may not be efficient for large number of resolution calls. If the resolver could have configurations / options to accept cached did events and fetch the events beyond the cached scope to create the DIDDoc it would be much more faster I guess.

So the resolver might look like, resolver(did, cachedEvent[], lastBlock). The lastBlock param would be the block number till where the events have been cached.

Let me know your thoughts. Thanks!