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eth2.0-specs
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Fixes from @ralexstokes

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Justin 2020-11-18 09:31:41 +00:00 committed by GitHub
parent 664bc4b42e
commit d16900a753
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1 changed files with 7 additions and 7 deletions
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14
specs/lightclient/sync-protocol.md
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@ -76,10 +76,10 @@ class LightClientUpdate(Container):
signed_header: BeaconBlockHeader signed_header: BeaconBlockHeader
# Merkle branch proving ancestry of the header in the snapshot # Merkle branch proving ancestry of the header in the snapshot
ancestry_branch: Vector[Bytes32, log2(FINALIZED_ROOT_INDEX)] ancestry_branch: Vector[Bytes32, log2(FINALIZED_ROOT_INDEX)]
# Merkle branches for the next sync committee # Merkle branch for the next sync committee
next_sync_committee_branch: Vector[Bytes32, log2(NEXT_SYNC_COMMITTEE_INDEX)] next_sync_committee_branch: Vector[Bytes32, log2(NEXT_SYNC_COMMITTEE_INDEX)]
# Sync committee aggregate signature # Sync committee aggregate signature
sync_committee_bits: Bitlist[MAX_SYNC_COMMITTEE_SIZE] sync_committee_bits: Bitvector[SYNC_COMMITTEE_SIZE]
sync_committee_signature: BLSSignature sync_committee_signature: BLSSignature
# Fork version for the aggregate signature # Fork version for the aggregate signature
fork_version: Version fork_version: Version
@ -127,7 +127,7 @@ def is_valid_light_client_update(store: LightClientStore, update: LightClientUpd
if new_period == old_period: if new_period == old_period:
assert new_snapshot.current_sync_committee == old_snapshot.current_sync_committee assert new_snapshot.current_sync_committee == old_snapshot.current_sync_committee
assert new_snapshot.next_sync_committee == old_snapshot.next_sync_committee assert new_snapshot.next_sync_committee == old_snapshot.next_sync_committee
else new_period == old_period + 1: else:
assert new_snapshot.current_sync_committee == old_snapshot.next_sync_committee assert new_snapshot.current_sync_committee == old_snapshot.next_sync_committee
assert is_valid_merkle_branch( assert is_valid_merkle_branch(
leaf=hash_tree_root(new_snapshot.next_sync_committee), leaf=hash_tree_root(new_snapshot.next_sync_committee),
@ -140,7 +140,7 @@ def is_valid_light_client_update(store: LightClientStore, update: LightClientUpd
# Verify sync committee bitfield length # Verify sync committee bitfield length
sync_committee = new_snapshot.current_sync_committee sync_committee = new_snapshot.current_sync_committee
assert len(update.sync_committee_bits) == len(sync_committee) assert len(update.sync_committee_bits) == len(sync_committee)
assert sum(update.sync_committee_bits) > MIN_SYNC_COMMITTEE_PARTICIPANTS assert sum(update.sync_committee_bits) >= MIN_SYNC_COMMITTEE_PARTICIPANTS
# Verify sync committee aggregate signature # Verify sync committee aggregate signature
participant_pubkeys = [pubkey for (bit, pubkey) in zip(update.sync_committee_bits, sync_committee.pubkeys) if bit] participant_pubkeys = [pubkey for (bit, pubkey) in zip(update.sync_committee_bits, sync_committee.pubkeys) if bit]
@ -166,9 +166,9 @@ def process_light_client_update(store: LightClientStore, update: LightClientUpda
if sum(update.sync_committee_bits) * 3 > len(update.sync_committee_bits) * 2 and update.snapshot.header != update.signed_header: if sum(update.sync_committee_bits) * 3 > len(update.sync_committee_bits) * 2 and update.snapshot.header != update.signed_header:
# Immediate update when quorum is reached # Immediate update when quorum is reached
store.snapshot = update.snapshot store.snapshot = update.snapshot
valid_updates = [] store.valid_updates = []
elif current_slot > old_snapshot.header.slot + LIGHT_CLIENT_UPDATE_TIMEOUT: elif current_slot > old_snapshot.header.slot + LIGHT_CLIENT_UPDATE_TIMEOUT:
# Forced best update when the update timeout has elapsed # Forced best update when the update timeout has elapsed
store.snapshot = max(valid_updates, key=lambda update: sum(update.sync_committee_bits)).new_snapshot store.snapshot = max(store.valid_updates, key=lambda update: sum(update.sync_committee_bits)).snapshot
valid_updates = [] store.valid_updates = []
``` ```