flashbots mev example

[njeans]

Hi I'm trying to run the flashbots mev example but I haven't been able to get it working. I get errors with regard to the builder getting the right block headers. There is no message in the relay about blocks being succesfully submitted.

here is my configration

participants:
  - el_type: geth
    cl_type: lighthouse
    count: 1
global_log_level: debug
additional_services:
  - dora
  - tx_spammer
  - blob_spammer
wait_for_finalization: false
network_params:
  deneb_fork_epoch: 1
mev_type: flashbots

I get many errors in rbuilder like:

2025-01-03T03:06:50.693940Z ERROR rbuilder::live_builder::block_output::bidding::parallel_sealer_bid_maker: Error on finalize_block on ParallelSealerBidMaker block_number=486 error=FinalizeError(RootHash(AsyncStateRoot(Provider(ConsistentView(Inconsistent { tip: GotExpected { got: Some(0xf66c0d8e8f79c75d263c6d2804436dd708c8435c97daee6defbce9dbee80f343), expected: Some(0xc6d9338ad3f44df70fbc5e66ed09073d829477c697d1fa0e7e1f27d008ffc84a) } })))))

I have also tried with deneb_fork_epoch: 0, deneb_fork_epoch: 1 and capella_fork_epoch: 0, and capella_fork_epoch: 1 and deneb_fork_epoch: 2+. Depending on those I get other types of errors about the builder having the wrong header or not being able to fetch the header.

I occasionally get message in the relay that a block was submitted passed the deadline when seconds_per_slot was lower than the default. I'm not sure if those are related.

[parithosh]

Could you try removing wait_for_finalization: false? The reason: A lot of the mev codebase is made for a finalizing network and healthy, if you try to use it pre-finality then things might break in weird ways. Second point is that please stick to 12s slots when using the mev workflow, while it would work with lower slot times, the chances of unknown bugs increases.

[njeans]

I am still getting the same errors and no logs in the relay about blocks being submitted with the wait_for_finalization removed.

[parithosh]

Thanks for the submission! I can reproduce it and will figure out what's going on and get back to you.

[njeans]

Awesome thank you!