## EPF5 Dev Updates - Week 17 [◀️ *previous update*](https://hackmd.io/@hangleang/epf5-week16) ### Goals For This Week - [ ] try to fix some found issues in my investigation ### Activities - have a week off for family vacation and home town visit, so haven't done anything much on EPF tasks - went back from holidays, try to keep up with the discussion around issues on `peerdas-devnet-2` - seen there is a [merged pull request](https://github.com/ethereum/consensus-specs/pull/3953) to update the specs to reject invalid data column sidecars withno blobs/commitments, update those validations according to the specs changes at this [commit](https://github.com/hangleang/grandine/commit/f837d0ea9f58d3b3e6cc059de67bfb5005bf6380) - merged Katya `peerdas-metrics` branch into `feature/das` branch for peerdas-specific metrics of grandine node at this [commit](https://github.com/hangleang/grandine/commit/7fa27a7508d6b2b4e244399c8cfe0cecb3b83ec4) - enabled debug logs on `eth2_libp2p` module for further debugging on running devnets - thanks to Barnabas for quick rolling out the updates, and allow ssh into grandine instances for debugging purpose - identify on rate limited warning when try to request `data_column_sidecars_by_range` from peers, which requesting 64 slots/blocks or 2 epochs per request while others client, specifically lighthouse, cap on [40 blocks per request](https://github.com/sigp/lighthouse/blob/17711b720e22adce6f7afb1ba610d84860a9e6f4/beacon_node/lighthouse_network/src/rpc/config.rs#L117), so I lower the request volumn to only 1 epoch per request, the fix is at this [commit](https://github.com/hangleang/grandine/commit/9153c36eb070b9ae0d2414c566942f34b541f334) ### Plan For Next Week - reconstruction data columns if more than half columns available --- [▶️ *next update*](https://hackmd.io/@hangleang/epf5-week18)