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fix comment + handle missing pending headers

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protolambda
2021-07-14 13:19:00 +02:00
parent f791fe7d1c
commit a7f58ef08a
1 changed files with 10 additions and 2 deletions
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12
specs/sharding/beacon-chain.md
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@@ -367,7 +367,7 @@ class ShardProposerSlashing(Container):
```python
class ShardWork(Container):
# Upon confirmation the data is reduced to just the header.
# Upon confirmation the data is reduced to just the commitment.
status: Union[ # See Shard Work Status enum
None, # SHARD_WORK_UNCONFIRMED
DataCommitment, # SHARD_WORK_CONFIRMED
@@ -597,7 +597,15 @@ def update_pending_shard_work(state: BeaconState, attestation: Attestation) -> N
current_headers: Sequence[PendingShardHeader] = committee_work.status.value
# Find the corresponding header, abort if it cannot be found
header_index = [header.root for header in current_headers].index(attestation.data.shard_blob_root)
header_index = len(current_headers)
for i, header in enumerate(current_headers):
if attestation.data.shard_blob_root == header.root:
header_index = i
break
# Attestations for an unknown header do not count towards shard confirmations, but can otherwise be valid.
if header_index == len(current_headers):
# TODO: Attestations may be re-included if headers are included late.
return
pending_header: PendingShardHeader = current_headers[header_index]
full_committee = get_beacon_committee(state, attestation.data.slot, attestation.data.index)