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# System prepended metadata

title: 'Geemo Update #3'

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# Geemo Update #3
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Hey everyone! This week I've continued to progress the LightClientUpdatesByRange implementation as well as started implementing the beacon api's which coincide with the light client endpoints. 

There is a bit of a sticking point with adding testing for the light client rpcs, since the beacon node does not support OutboundRequests for the light client rpcs. All existing rpc tests use a function called `build_node_pair` so adding support for the OutboundRequests exclusively for testing has proven a bit difficult for me.

This week I hope to complete the beacon apis for light_client/optimistic_update, light_client/finality_update, and light_client/bootstrap with accompanying tests. Also I'll be working towards completing the Light client updates by range rpc.


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This is a running list of PRs submitted to Lighthouse during the EPF program with their merge status listed.

Light Server related PRs:
- [Draft] Support Light client updates by range rpc and add LightClientHeader. https://github.com/sigp/lighthouse/pull/3886
- Support LightClientFinalityUpdate and LightClientOptimisticUpdate rpcs as according to the spec. https://github.com/sigp/lighthouse/pull/3849
- [Merged] Adds light client optimistic update gossip reprocessing. We found that the gossip topics raced with receiving blocks. Add the parent_root to ReprocessQueueMessage::BlockImported so we can remove blocks from queue when a block arrives that has the same parent root. We use the parent root as opposed to the block_root because the LightClientOptimisticUpdate does not contain the block_root. https://github.com/sigp/lighthouse/pull/3799
- [Merged] Support light client gossip topics. Implements the light client gossip topics from the spec: light_client_finality_update and light_client_optimistic_update. https://github.com/sigp/lighthouse/pull/3693

Miscellaneous PRs:
- [Merged] Adding Cli tests for logging flags by adding logger_config to the main Config: https://github.com/sigp/lighthouse/pull/3609
- [Merged] Added execution-timeout-multiplier flag and a cli test to ensure the execution layer config has the multiplier set correctly. This allows hardware constrained devices to avoid livelock due to late responses: https://github.com/sigp/lighthouse/pull/3631
- [Merged] - Optimize finalized chain sync by skipping newPayload messages. Sync speeds peaking at 16 slots/second rather than ~5-6 slots/second for unstable by not sending the execution payloads while syncing the finalized portion of the chain: https://github.com/sigp/lighthouse/pull/3738
- [Merged] Added checkpoint-sync-url-timeout flag to cli. Added timeout field to ClientGenesis::CheckpointSyncUrl to utilize timeout set. https://github.com/sigp/lighthouse/pull/3710
- [Merged] Add more INFO level logging about when the VC is producing a block. https://github.com/sigp/lighthouse/pull/3858