Apply Danny's code review

specs/merge/fork-choice.md

@@ -176,8 +176,10 @@ def on_block(store: Store, signed_block: SignedBeaconBlock) -> None:
     store.block_states[hash_tree_root(block)] = state
 
     # Add proposer score boost if the block is timely
-    if (get_current_slot(store) == block.slot and
-       store.time % SECONDS_PER_SLOT < SECONDS_PER_SLOT // ATTESTATION_OFFSET_QUOTIENT):
+    is_before_attestation_broadcast = (
+        store.time % SECONDS_PER_SLOT < SECONDS_PER_SLOT // ATTESTATION_OFFSET_QUOTIENT
+    )
+    if get_current_slot(store) == block.slot and is_before_attestation_broadcast:
         store.proposer_score_boost = LatestMessage(
             root=hash_tree_root(block),
             epoch=compute_epoch_at_slot(block.slot)

specs/phase0/fork-choice.md

@@ -176,12 +176,11 @@ def get_latest_attesting_balance(store: Store, root: Root) -> Gwei:
     ))
     proposer_score = Gwei(0)
     if store.proposer_score_boost.root != Root():
-        block_slot = store.blocks[root].slot
-        if get_ancestor(store, root, block_slot) == store.proposer_score_boost.root:
+        block = store.blocks[root]
+        if get_ancestor(store, root, block.slot) == store.proposer_score_boost.root:
             num_validators = len(get_active_validator_indices(state, get_current_epoch(state)))
             avg_balance = get_total_active_balance(state) // num_validators
-            block_epoch = compute_epoch_at_slot(block_slot)
-            committee_size = get_committee_count_per_slot(state, block_epoch) * TARGET_COMMITTEE_SIZE
+            committee_size = num_validators // SLOTS_PER_EPOCH
             committee_weight = committee_size * avg_balance
             proposer_score = (committee_weight * PROPOSER_SCORE_BOOST) // 100
     return attestation_score + proposer_score
@@ -407,8 +406,10 @@ def on_block(store: Store, signed_block: SignedBeaconBlock) -> None:
     store.block_states[hash_tree_root(block)] = state
 
     # Add proposer score boost if the block is timely
-    if (get_current_slot(store) == block.slot and
-       store.time % SECONDS_PER_SLOT < SECONDS_PER_SLOT // ATTESTATION_OFFSET_QUOTIENT):
+    is_before_attestation_broadcast = (
+        store.time % SECONDS_PER_SLOT < SECONDS_PER_SLOT // ATTESTATION_OFFSET_QUOTIENT
+    )
+    if get_current_slot(store) == block.slot and is_before_attestation_broadcast:
         store.proposer_score_boost = LatestMessage(
             root=hash_tree_root(block),
             epoch=compute_epoch_at_slot(block.slot)

specs/phase0/validator.md

@@ -446,7 +446,7 @@ def get_block_signature(state: BeaconState, block: BeaconBlock, privkey: int) ->
 
 A validator is expected to create, sign, and broadcast an attestation during each epoch. The `committee`, assigned `index`, and assigned `slot` for which the validator performs this role during an epoch are defined by `get_committee_assignment(state, epoch, validator_index)`.
 
-A validator should create and broadcast the `attestation` to the associated attestation subnet when either (a) the validator has received a valid block from the expected block proposer for the assigned `slot` or (b) one-third of the `slot` has transpired (`SECONDS_PER_SLOT / ATTESTATION_OFFSET_QUOTIENT` seconds after the start of `slot`) -- whichever comes _first_.
+A validator should create and broadcast the `attestation` to the associated attestation subnet when either (a) the validator has received a valid block from the expected block proposer for the assigned `slot` or (b) `1 / ATTESTATION_OFFSET_QUOTIENT` of the `slot` has transpired (`SECONDS_PER_SLOT / ATTESTATION_OFFSET_QUOTIENT` seconds after the start of `slot`) -- whichever comes _first_.
 
 *Note*: Although attestations during `GENESIS_EPOCH` do not count toward FFG finality, these initial attestations do give weight to the fork choice, are rewarded, and should be made.
 
@@ -569,7 +569,7 @@ def get_aggregate_signature(attestations: Sequence[Attestation]) -> BLSSignature
 
 #### Broadcast aggregate
 
-If the validator is selected to aggregate (`is_aggregator`), then they broadcast their best aggregate as a `SignedAggregateAndProof` to the global aggregate channel (`beacon_aggregate_and_proof`) two-thirds of the way through the `slot`-that is, `SECONDS_PER_SLOT * 2 / 3` seconds after the start of `slot`.
+If the validator is selected to aggregate (`is_aggregator`), then they broadcast their best aggregate as a `SignedAggregateAndProof` to the global aggregate channel (`beacon_aggregate_and_proof`) `2 / ATTESTATION_OFFSET_QUOTIENT` of the way through the `slot`-that is, `SECONDS_PER_SLOT * 2 / ATTESTATION_OFFSET_QUOTIENT` seconds after the start of `slot`.
 
 Selection proofs are provided in `AggregateAndProof` to prove to the gossip channel that the validator has been selected as an aggregator.