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eth2.0-specs
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randaomixes init now with eth1 hash repeat

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protolambda 2019-10-27 16:20:35 +01:00
parent 2cc643d2bb
commit e6e203ce85
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2 changed files with 2 additions and 8 deletions
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4
specs/core/0_beacon-chain.md
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@ -1112,10 +1112,8 @@ def initialize_beacon_state_from_eth1(eth1_block_hash: Hash,
genesis_time=eth1_timestamp - eth1_timestamp % SECONDS_PER_DAY + 2 * SECONDS_PER_DAY,
eth1_data=Eth1Data(block_hash=eth1_block_hash, deposit_count=len(deposits)),
latest_block_header=BeaconBlockHeader(body_root=hash_tree_root(BeaconBlockBody())),
randao_mixes=[eth1_block_hash] * EPOCHS_PER_HISTORICAL_VECTOR, # to limit deposit order bias in early epochs
)
# Set the initial RANDAO mixes to hashes seeded by the Eth1 hash, to limit deposit ordering committee bias.
for i in range(MIN_SEED_LOOKAHEAD + 1):
state.randao_mixes[EPOCHS_PER_HISTORICAL_VECTOR - i - 1] = hash(eth1_block_hash + int_to_bytes(i, 8))
# Process deposits
leaves = list(map(lambda deposit: deposit.data, deposits))

6
test_libs/pyspec/eth2spec/test/helpers/genesis.py
View File

@ -29,13 +29,9 @@ def create_genesis_state(spec, num_validators):
block_hash=eth1_block_hash,
),
latest_block_header=spec.BeaconBlockHeader(body_root=spec.hash_tree_root(spec.BeaconBlockBody())),
randao_mixes=[eth1_block_hash] * spec.EPOCHS_PER_HISTORICAL_VECTOR,
)
# Set the initial RANDAO mixes to hashes seeded by the Eth1 hash, to limit deposit ordering committee bias.
for i in range(spec.MIN_SEED_LOOKAHEAD + 1):
state.randao_mixes[spec.EPOCHS_PER_HISTORICAL_VECTOR - i - 1] = \
spec.hash(eth1_block_hash + spec.int_to_bytes(i, 8))
# We "hack" in the initial validators,
# as it is much faster than creating and processing genesis deposits for every single test case.
state.balances = [spec.MAX_EFFECTIVE_BALANCE] * num_validators