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Merge pull request #331 from ethereum/vbuterin-patch-20 

Edit latest_block_roots in place instead of as a queue
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vbuterin 2018-12-17 04:40:45 -05:00 committed by GitHub
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specs/core/0_beacon-chain.md
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@ -1337,7 +1337,7 @@ Below are the processing steps that happen at every slot.
### Block roots ### Block roots
* Let `previous_block_root` be the `tree_hash_root` of the previous beacon block processed in the chain. * Let `previous_block_root` be the `tree_hash_root` of the previous beacon block processed in the chain.
* Set `state.latest_block_roots = state.latest_block_roots[1:] + [previous_block_root]`. * Set `state.latest_block_roots[(state.slot - 1) % LATEST_BLOCK_ROOTS_LENGTH] = previous_block_root`.
* If `state.slot % LATEST_BLOCK_ROOTS_LENGTH == 0` append `merkle_root(state.latest_block_roots)` to `state.batched_block_roots`. * If `state.slot % LATEST_BLOCK_ROOTS_LENGTH == 0` append `merkle_root(state.latest_block_roots)` to `state.batched_block_roots`.
## Per-block processing ## Per-block processing