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Update 0_beacon-chain-validator.md

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terence tsao
2019-02-14 14:00:43 -08:00
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specs/validator/0_beacon-chain-validator.md
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@@ -260,9 +260,9 @@ Set `attestation_data.beacon_block_root = hash_tree_root(head)` where `head` is
##### Epoch boundary root
Set `attestation_data.epoch_boundary_root = hash_tree_root(epoch_boundary)` where `epoch_boundary` is the block at the most recent epoch boundary in the chain defined by `head` -- i.e. the `BeaconBlock` where `block.slot == get_epoch_start_slot(head.slot)`.
Set `attestation_data.epoch_boundary_root = hash_tree_root(epoch_boundary)` where `epoch_boundary` is the block at the most recent epoch boundary in the chain defined by `head` -- i.e. the `BeaconBlock` where `block.slot == get_epoch_start_slot(slot_to_epoch(head.slot))`.
_Note:_ This can be looked up in the state using `get_block_root(state, get_epoch_start_slot(head.slot))`.
_Note:_ This can be looked up in the state using `get_block_root(state, get_epoch_start_slot(slot_to_epoch(head.slot)))`.
##### Shard block root