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Prefix update period variables

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Etan Kissling 2022-07-10 22:05:18 -07:00
parent 2ddb3833ff
commit b7a0e532e4
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1 changed files with 8 additions and 8 deletions
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16
specs/altair/sync-protocol.md
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@ -219,11 +219,11 @@ def validate_light_client_update(store: LightClientStore,
# Verify update does not skip a sync committee period # Verify update does not skip a sync committee period
assert current_slot >= update.signature_slot > update.attested_header.slot >= update.finalized_header.slot assert current_slot >= update.signature_slot > update.attested_header.slot >= update.finalized_header.slot
store_period = compute_sync_committee_period_at_slot(store.finalized_header.slot) store_period = compute_sync_committee_period_at_slot(store.finalized_header.slot)
signature_period = compute_sync_committee_period_at_slot(update.signature_slot) update_signature_period = compute_sync_committee_period_at_slot(update.signature_slot)
assert signature_period in (store_period, store_period + 1) assert update_signature_period in (store_period, store_period + 1)
# Verify update is relevant # Verify update is relevant
attested_period = compute_sync_committee_period_at_slot(update.attested_header.slot) update_attested_period = compute_sync_committee_period_at_slot(update.attested_header.slot)
assert update.attested_header.slot > store.finalized_header.slot assert update.attested_header.slot > store.finalized_header.slot
# Verify that the `finality_branch`, if present, confirms `finalized_header` # Verify that the `finality_branch`, if present, confirms `finalized_header`
@ -248,10 +248,10 @@ def validate_light_client_update(store: LightClientStore,
# Verify that the `next_sync_committee`, if present, actually is the next sync committee saved in the # Verify that the `next_sync_committee`, if present, actually is the next sync committee saved in the
# state of the `attested_header` # state of the `attested_header`
if not is_sync_committee_update(update): if not is_sync_committee_update(update):
assert attested_period == store_period assert update_attested_period == store_period
assert update.next_sync_committee == SyncCommittee() assert update.next_sync_committee == SyncCommittee()
else: else:
if attested_period == store_period: if update_attested_period == store_period:
assert update.next_sync_committee == store.next_sync_committee assert update.next_sync_committee == store.next_sync_committee
assert is_valid_merkle_branch( assert is_valid_merkle_branch(
leaf=hash_tree_root(update.next_sync_committee), leaf=hash_tree_root(update.next_sync_committee),
@ -262,7 +262,7 @@ def validate_light_client_update(store: LightClientStore,
) )
# Verify sync committee aggregate signature # Verify sync committee aggregate signature
if signature_period == store_period: if update_signature_period == store_period:
sync_committee = store.current_sync_committee sync_committee = store.current_sync_committee
else: else:
sync_committee = store.next_sync_committee sync_committee = store.next_sync_committee
@ -281,8 +281,8 @@ def validate_light_client_update(store: LightClientStore,
```python ```python
def apply_light_client_update(store: LightClientStore, update: LightClientUpdate) -> None: def apply_light_client_update(store: LightClientStore, update: LightClientUpdate) -> None:
store_period = compute_sync_committee_period_at_slot(store.finalized_header.slot) store_period = compute_sync_committee_period_at_slot(store.finalized_header.slot)
finalized_period = compute_sync_committee_period_at_slot(update.finalized_header.slot) update_finalized_period = compute_sync_committee_period_at_slot(update.finalized_header.slot)
if finalized_period == store_period + 1: if update_finalized_period == store_period + 1:
store.current_sync_committee = store.next_sync_committee store.current_sync_committee = store.next_sync_committee
store.next_sync_committee = update.next_sync_committee store.next_sync_committee = update.next_sync_committee
store.finalized_header = update.finalized_header store.finalized_header = update.finalized_header