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ensure fork choice functions when GENESIS_SLOT != 0

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Danny Ryan 2019-12-09 19:02:16 -07:00
parent cf5b48ff21
commit 9989f3ea9d
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1 changed files with 15 additions and 2 deletions
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specs/core/0_fork-choice.md
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@ -13,9 +13,15 @@
- [`LatestMessage`](#latestmessage)
- [`Store`](#store)
- [`get_genesis_store`](#get_genesis_store)
- [`get_slots_since_genesis`](#get_slots_since_genesis)
- [`get_current_slot`](#get_current_slot)
- [`compute_slots_since_epoch_start`](#compute_slots_since_epoch_start)
- [`get_ancestor`](#get_ancestor)
- [`get_latest_attesting_balance`](#get_latest_attesting_balance)
- [`filter_block_tree`](#filter_block_tree)
- [`get_filtered_block_tree`](#get_filtered_block_tree)
- [`get_head`](#get_head)
- [`should_update_justified_checkpoint`](#should_update_justified_checkpoint)
- [Handlers](#handlers)
- [`on_tick`](#on_tick)
- [`on_block`](#on_block)
@ -96,11 +102,18 @@ def get_genesis_store(genesis_state: BeaconState) -> Store:
)
```
#### `get_slots_since_genesis`
```python
def get_slots_since_genesis(store: Store) -> Slot:
return Slot((store.time - store.genesis_time) // SECONDS_PER_SLOT)
```
#### `get_current_slot`
```python
def get_current_slot(store: Store) -> Slot:
return Slot((store.time - store.genesis_time) // SECONDS_PER_SLOT)
return GENESIS_SLOT + get_slots_since_genesis(store)
```
#### `compute_slots_since_epoch_start`
@ -327,7 +340,7 @@ def on_attestation(store: Store, attestation: Attestation) -> None:
# Attestations can only affect the fork choice of subsequent slots.
# Delay consideration in the fork choice until their slot is in the past.
assert store.time >= (attestation.data.slot + 1) * SECONDS_PER_SLOT
assert get_current_slot(store) >= attestation.data.slot + 1
# Get state at the `target` to validate attestation and calculate the committees
indexed_attestation = get_indexed_attestation(target_state, attestation)