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Merge pull request #532 from benjaminion/fix-to-verify-aggregation-bitfield 

Fix to verify bitfields and aggregate signature.
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Danny Ryan 2019-01-30 15:46:29 -08:00 committed by GitHub
parent ad08dab181 3c4615df01
commit bdff6943bf
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1 changed files with 9 additions and 2 deletions
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11
specs/core/0_beacon-chain.md
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@ -1690,8 +1690,15 @@ For each `attestation` in `block.body.attestations`:
```python
assert attestation.custody_bitfield == b'\x00' * len(attestation.custody_bitfield) # [TO BE REMOVED IN PHASE 1]
assert attestation.aggregation_bitfield != b'\x00' * len(attestation.aggregation_bitfield)
for i in range(len(crosslink_committee)):
crosslink_committee = [
committee for committee, shard in get_crosslink_committees_at_slot(state, attestation.data.slot)
if shard == attestation.data.shard
][0]
verify_bitfield(attestation.aggregation_bitfield, len(crosslink_committee))
verify_bitfield(attestation.custody_bitfield, len(crosslink_committee))
for i in range(len(crosslink_committee):
if get_bitfield_bit(attestation.aggregation_bitfield, i) == 0b0:
assert get_bitfield_bit(attestation.custody_bitfield, i) == 0b0