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Geemo Update #2


Hey everyone! I haven't been making consistent updates but I have been making progress towards implementing the light server with lighthouse. Here are the PRs I've made to the lighthouse codebase:

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
  • 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:

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EPF 4 Final Update

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This update will cover the current state of the new block packing methods for Lighthouse. With the assistance of Michael Sproul we have an optimality preserving aggregation strategy implemented. We are currently testing and optimizing it’s performance. This comes as a pretty significant change to the block packing logic so we must ensure that everything functions correctly with good performance. Michael set an initial performance goal as attestation packing taking <50ms.

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EPF Update 8

In the past week I tested and optimised the decomposition approach that I described in my previous update. The resulting algorithm foes not perform as well as I would have hoped. That being said it is faster than the base MIP solution in some cases, but it’s not a significant difference. Additionally I’ve tested the aggregation branch and resolved some outstanding issues on it. In the next week I’d like to get the aggregation branch merged or at least looked at by Michael Sproul. It still does not perform as well as the greedy aggregation approach so it certainly isn’t worth merging as is, but I think this could be solved.

Oct 2, 2023
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