Idea: Frontend attribution attestations.

It's hard to prove usage of a frontend without some baked-in field that a given contract already accommodates. What about all the other contracts?

What if we used EAS to allow clients to attest to producing a transaction hash before the transaction is submitted to the network?

This would allow verifiable aggregate analytics for frontends and wallets, which could be used for things like reliable impact metrics in RetroPGF or redistributing awards/fees for frontends.