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Update specs/core/0_beacon-chain.md 

Co-Authored-By: vbuterin <v@buterin.com>
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Danny Ryan 2018-11-26 18:35:02 -05:00 committed by GitHub
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@ -1008,7 +1008,7 @@ All validators:
Validators justifying the cycle boundary block at the start of the current cycle:
* Let `this_cycle_attestations = [a for a in state.pending_attestations if s <= a.data.slot < s + CYCLE_LENGTH]`. (note: this is the set of attestations _of slots in the cycle `s...s+CYCLE_LENGTH-1`_, not attestations _that got included in the chain during the cycle `s...s+CYCLE_LENGTH-1`_)
* Let `this_cycle_boundary_attestations = [a for a in this_cycle_attestations if a.data.cycle_boundary_hash == get_block_hash(state, block, s) a.justified_slot == state.justification_source]`.
* Let `this_cycle_boundary_attestations = [a for a in this_cycle_attestations if a.data.cycle_boundary_hash == get_block_hash(state, block, s) and a.justified_slot == state.justification_source]`.
* Let `this_cycle_boundary_attesters` be the union of the validator index sets given by `[get_attestation_participants(state, a.data, a.attester_bitfield) for a in this_cycle_boundary_attestations]`.
* Let `this_cycle_boundary_attesting_balance = sum([balance_at_stake(v) for v in this_cycle_boundary_attesters])`.