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Removed some no-longer-necessary functions

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vbuterin 2019-03-19 09:34:37 -05:00 committed by GitHub
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specs/core/0_beacon-chain.md
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@ -64,9 +64,7 @@
- [`split`](#split) - [`split`](#split)
- [`get_epoch_committee_count`](#get_epoch_committee_count) - [`get_epoch_committee_count`](#get_epoch_committee_count)
- [`get_shuffling`](#get_shuffling) - [`get_shuffling`](#get_shuffling)
- [`get_previous_epoch_committee_count`](#get_previous_epoch_committee_count)
- [`get_current_epoch_committee_count`](#get_current_epoch_committee_count) - [`get_current_epoch_committee_count`](#get_current_epoch_committee_count)
- [`get_next_epoch_committee_count`](#get_next_epoch_committee_count)
- [`get_crosslink_committees_at_slot`](#get_crosslink_committees_at_slot) - [`get_crosslink_committees_at_slot`](#get_crosslink_committees_at_slot)
- [`get_block_root`](#get_block_root) - [`get_block_root`](#get_block_root)
- [`get_state_root`](#get_state_root) - [`get_state_root`](#get_state_root)
@ -823,20 +821,6 @@ def get_shuffling(seed: Bytes32,
**Note**: this definition and the next few definitions make heavy use of repetitive computing. Production implementations are expected to appropriately use caching/memoization to avoid redoing work. **Note**: this definition and the next few definitions make heavy use of repetitive computing. Production implementations are expected to appropriately use caching/memoization to avoid redoing work.
### `get_previous_epoch_committee_count`
```python
def get_previous_epoch_committee_count(state: BeaconState) -> int:
"""
Return the number of committees in the previous epoch of the given ``state``.
"""
previous_active_validators = get_active_validator_indices(
state.validator_registry,
state.previous_shuffling_epoch,
)
return get_epoch_committee_count(len(previous_active_validators))
```
### `get_current_epoch_committee_count` ### `get_current_epoch_committee_count`
```python ```python
@ -851,20 +835,6 @@ def get_current_epoch_committee_count(state: BeaconState) -> int:
return get_epoch_committee_count(len(current_active_validators)) return get_epoch_committee_count(len(current_active_validators))
``` ```
### `get_next_epoch_committee_count`
```python
def get_next_epoch_committee_count(state: BeaconState) -> int:
"""
Return the number of committees in the next epoch of the given ``state``.
"""
next_active_validators = get_active_validator_indices(
state.validator_registry,
get_current_epoch(state) + 1,
)
return get_epoch_committee_count(len(next_active_validators))
```
### `get_crosslink_committees_at_slot` ### `get_crosslink_committees_at_slot`
```python ```python
@ -895,10 +865,7 @@ def get_crosslink_committees_at_slot(state: BeaconState,
state.current_shuffling_start_shard - EPOCH_LENGTH * committees_per_epoch state.current_shuffling_start_shard - EPOCH_LENGTH * committees_per_epoch
) % SHARD_COUNT ) % SHARD_COUNT
elif epoch == next_epoch: elif epoch == next_epoch:
current_epoch_committees = get_epoch_committee_count(get_active_validator_indices( current_epoch_committees = get_current_epoch_committee_count(state)
state.validator_registry,
current_epoch,
))
shuffling_start_shard = ( shuffling_start_shard = (
state.current_shuffling_start_shard + EPOCH_LENGTH * current_epoch_committees state.current_shuffling_start_shard + EPOCH_LENGTH * current_epoch_committees
) % SHARD_COUNT ) % SHARD_COUNT