Investigate if/how can get smart contract parameter setting when a node isn't listening for EVM events

[BigLep]

Done Criteria

We have a written down understanding of how nodes can get smart contract state even if they aren't listening for EVM events.

Why Important

This is an important enabler for a smart-contract based solution for #800 because implementations like Lotus don't enable ETH RPC APIs and event listening by default.

User/Customer

Maintainers designing #800
Lotus users who don't enable ETH RPC / events functionality

Notes