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Update 0_beacon-chain-validator.md

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terence tsao 2019-06-09 12:09:54 -07:00 committed by GitHub
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specs/validator/0_beacon-chain-validator.md
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@ -297,11 +297,11 @@ Set `attestation_data.beacon_block_root = signing_root(head_block)`.
* Set `attestation_data.source_epoch = head_state.current_justified_epoch`. * Set `attestation_data.source_epoch = head_state.current_justified_epoch`.
* Set `attestation_data.source_root = head_state.current_justified_root`. * Set `attestation_data.source_root = head_state.current_justified_root`.
* Set `attestation_data.target_epoch = get_current_epoch(head_state)` * Set `attestation_data.target_epoch = get_current_epoch(head_state)`
* Set `attestation_data.target_root = signing_root(epoch_boundary_block)` where `epoch_boundary_block` is the block at the most recent epoch boundary. * Set `attestation_data.target_root = epoch_boundary_block_root` where `epoch_boundary_block_root` is the root of block at the most recent epoch boundary.
*Note*: `epoch_boundary_block` can be looked up in the state using: *Note*: `epoch_boundary_block_root` can be looked up in the state using:
* Let `epoch_start_slot = get_epoch_start_slot(get_current_epoch(head_state))`. * Let `epoch_start_slot = get_epoch_start_slot(get_current_epoch(head_state))`.
* Let `epoch_boundary_block = head if epoch_start_slot == head_state.slot else get_block_root(state, epoch_start_slot)`. * Let `epoch_boundary_block_root = signing_root(head_block) if epoch_start_slot == head_state.slot else get_block_root(state, epoch_start_slot)`.
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