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Merge pull request #699 from ethereum/start_shard_bug 

fix committee assignment bugs
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Danny Ryan 2019-03-03 16:53:57 -07:00 committed by GitHub
parent d293b12b8c dbbfb93873
commit 146aef313e
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1 changed files with 8 additions and 5 deletions
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13
specs/core/0_beacon-chain.md
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@ -877,19 +877,22 @@ def get_crosslink_committees_at_slot(state: BeaconState,
shuffling_epoch = state.previous_shuffling_epoch
shuffling_start_shard = state.previous_shuffling_start_shard
elif epoch == next_epoch:
current_committees_per_epoch = get_current_epoch_committee_count(state)
committees_per_epoch = get_next_epoch_committee_count(state)
shuffling_epoch = next_epoch
epochs_since_last_registry_update = current_epoch - state.validator_registry_update_epoch
if registry_change:
committees_per_epoch = get_next_epoch_committee_count(state)
seed = generate_seed(state, next_epoch)
shuffling_epoch = next_epoch
current_committees_per_epoch = get_current_epoch_committee_count(state)
shuffling_start_shard = (state.current_shuffling_start_shard + current_committees_per_epoch) % SHARD_COUNT
elif epochs_since_last_registry_update > 1 and is_power_of_two(epochs_since_last_registry_update):
committees_per_epoch = get_next_epoch_committee_count(state)
seed = generate_seed(state, next_epoch)
shuffling_epoch = next_epoch
shuffling_start_shard = state.current_shuffling_start_shard
else:
committees_per_epoch = get_current_epoch_committee_count(state)
seed = state.current_shuffling_seed
shuffling_epoch = state.current_shuffling_epoch
shuffling_start_shard = state.current_shuffling_start_shard
shuffling = get_shuffling(
@ -2093,8 +2096,8 @@ def update_validator_registry(state: BeaconState) -> None:
and perform the following updates:
* Set `state.current_shuffling_epoch = next_epoch`
* Set `state.current_shuffling_start_shard = (state.current_shuffling_start_shard + get_current_epoch_committee_count(state)) % SHARD_COUNT`
* Set `state.current_shuffling_epoch = next_epoch`
* Set `state.current_shuffling_seed = generate_seed(state, state.current_shuffling_epoch)`
If a validator registry update does _not_ happen do the following: