Proof submission from other address?

[AuHau]

While writing the spec, I realized that we do not check the address of the tx sender for submitting proof.
Should we restrict that? While I don't necessarily see any problems with leaving it open, my intuition says we should restrict it. Restricting also does not affect anything IMHO, but may prevent some potential issues?

[markspanbroek]

I don't know. I left it open, because I didn't want to restrict scenarios where the sending of the transaction is outsourced to some other party. An aggregator could be the other party later on. But then we'll end up changing submitProof() anyway.
And maybe we don't want hosts to outsource this stuff...

[AuHau]

Yeah, my exact thoughts are that we should not allow outsourcing...

I would restrict it for now and revisit it if needed.