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Fair proposer selection probability 

Note that as a side effect, proposer selection becomes less predictable, but I don't feel like this is a large downside.
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vbuterin 2019-03-13 21:42:49 -05:00 committed by GitHub
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specs/core/0_beacon-chain.md
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@ -1014,7 +1014,13 @@ def get_beacon_proposer_index(state: BeaconState,
assert previous_epoch <= epoch <= next_epoch assert previous_epoch <= epoch <= next_epoch
first_committee, _ = get_crosslink_committees_at_slot(state, slot, registry_change)[0] first_committee, _ = get_crosslink_committees_at_slot(state, slot, registry_change)[0] i = 0
while i < len(first_committee):
rand_byte = hash(generate_seed(get_current_epoch(state)) + int_to_bytes8(i // 32))[i % 32]
candidate = first_committee[(epoch % i) % len(first_committee)]
if get_effective_balance(state, candidate) * 256 > MAX_DEPOSIT_AMOUNT * rand_byte:
return candidate
i += 1
return first_committee[epoch % len(first_committee)] return first_committee[epoch % len(first_committee)]
``` ```