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## Issue Addressed Closes https://github.com/sigp/lighthouse/issues/2962 ## Proposed Changes Build all caches on the checkpoint state before storing it in the database. Additionally, fix a bug in `signature_verify_chain_segment` which prevented block verification from succeeding unless the previous epoch cache was already built. The previous epoch cache is required to verify the signatures of attestations included from previous epochs, even when all the blocks in the segment are from the same epoch. The comments around `signature_verify_chain_segment` have also been updated to reflect the fact that it should only be used on a chain of blocks from a single epoch. I believe this restriction had already been added at some point in the past and that the current comments were just outdated (and I think because the proposer shuffling can change in the next epoch based on the blocks applied in the current epoch that this limitation is essential). |
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