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Generate seed once for get_beacon_proposer_index #1013

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merged 3 commits into from
May 1, 2019
Merged

Generate seed once for get_beacon_proposer_index #1013

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c5d6c04
Update 0_beacon-chain.md
terencechain Apr 30, 2019
4079027
Update 0_beacon-chain.md
JustinDrake May 1, 2019
f62126d
Update 0_beacon-chain.md
JustinDrake May 1, 2019
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3 changes: 2 additions & 1 deletion specs/core/0_beacon-chain.md
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Original file line number Diff line number Diff line change
Expand Up @@ -929,10 +929,11 @@ def get_beacon_proposer_index(state: BeaconState) -> ValidatorIndex:
current_epoch = get_current_epoch(state)
first_committee, _ = get_crosslink_committees_at_slot(state, state.slot)[0]
MAX_RANDOM_BYTE = 2**8 - 1
seed = generate_seed(state, current_epoch)
i = 0
while True:
candidate_index = first_committee[(current_epoch + i) % len(first_committee)]
random_byte = hash(generate_seed(state, current_epoch) + int_to_bytes8(i // 32))[i % 32]
random_byte = hash(seed + int_to_bytes8(i // 32))[i % 32]
effective_balance = state.validator_registry[candidate_index].effective_balance
if effective_balance * MAX_RANDOM_BYTE >= MAX_EFFECTIVE_BALANCE * random_byte:
return candidate_index
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