Daniel Wang

@d1onys1us @KorbinianK please mark this PR ready so I'll take a look

> Should this be configurable by the user or fixed behind the scene to our relayer? If the first, this requires changes to the bridge flow, new views and logic....

> I think using PBS is still greatly preferred because it's the only mechanism that allows 100% protection of the relayer (currently the dest owner can still create difficulties). And...

Guys, shall we merge this PR please? Need a quick decision here.

> > Guys, shall we merge this PR please? Need a quick decision here. > > Not sure if we will even need it because I'm not expecting many relayer...

> For me it seems only better from prover point of view (so they know when exactly ZK proofs needed) but this implies we might see a dropout around ZK-proven...

> This seems to be a redo of the discussion we had back in January when I also raised this issue: [#15568 (comment)](https://github.com/taikoxyz/taiko-mono/pull/15568#issuecomment-1910538272). > > I still have the same...

Tests added, please take another look.

> @dantaik I need the return value, otherwise I cannot determine whether a transaction will go to retriable via simulateContract. It does not emit events during simulation (`eth_call` does not...