allow getBlockIdAtSlot to answer queries from available states
#5869
+192
−12
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After checkpoint sync, historical block IDs cannot yet be queried. However, they are needed to compute dependent roots of `ShufflingRef`. To allow lookup, enable `getBlockIdAtSlot` to answer from compatible states in memory; as long as they descend from the finalized checkpoint and the requested slot is sufficiently recent, `block_roots` contains everything to recover `BlockSlotId` up to `SLOTS_PER_HISTORICAL_ROOT`. This is similar to how `attester_dependent_root` etc. are computed. This accelerates the first couple minutes of checkpoint sync on Mainnet, especially the time until finality advances past the synced checkpoint.
about 2 minutes to sync from finalized checkpoint |
arnetheduck
reviewed
Feb 9, 2024
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After checkpoint sync, historical block IDs cannot yet be queried. However, they are needed to compute dependent roots of
ShufflingRef. To allow lookup, enablegetBlockIdAtSlotto answer from compatible states in memory; as long as they descend from the finalized checkpoint and the requested slot is sufficiently recent,block_rootscontains everything to recoverBlockSlotIdup toSLOTS_PER_HISTORICAL_ROOT. This is similar to howattester_dependent_rootetc. are computed.This accelerates the first couple minutes of checkpoint sync on Mainnet, especially the time until finality advances past the synced checkpoint.