# FOCIL 2025-01-14 notes: * support on `lighthouse` from eitan of sigma prime and interest from others * plan to shift most focus to `reth` * plan to launch `reth` on kurtosis devnet with `prysm` * initial testing plan based on custom mempool logic to filter based on e.g. calldata * [`TransactionValidator`](https://reth.rs/docs/reth_transaction_pool/validate/trait.TransactionValidator.html) * would have some percentage of validators deployed with modified (censoring) `reth` * [transaction spammer](https://github.com/ethpandaops/spamoor) would be configured to broadcast "censorable" transactions * reuse `forkChoiceUpdated` or new engine API * `updateBlockWithInclusionList` * work required to add new engine API to `reth` and wire up block production links: * [alloy diff](https://github.com/alloy-rs/alloy/compare/main...jacobkaufmann:alloy:prague-focil) * [reth diff](https://github.com/paradigmxyz/reth/compare/main...jacobkaufmann:reth:prague-focil) * [lighthouse diff](https://github.com/sigp/lighthouse/compare/unstable...jacobkaufmann:lighthouse:electra-focil) * [lighthouse fork choice PR](https://github.com/jacobkaufmann/lighthouse/pull/2) (h/t eitan)