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Embiggened sync committee size and added sub-aggregates

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vbuterin 2020-11-25 19:38:45 +08:00 committed by GitHub
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1 changed files with 8 additions and 3 deletions
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specs/lightclient/beacon-chain.md
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@ -47,7 +47,8 @@ This is a standalone beacon chain patch adding light client support via sync com
| Name | Value |
| - | - |
| `SYNC_COMMITTEE_SIZE` | `uint64(2**8)` (= 256) |
| `SYNC_COMMITTEE_SIZE` | `uint64(2**10)` (= 1024) |
| `SYNC_PUBKEY_AGGREGATION_INTERVAL` | `uint64(2**6)` (= 64) |
### Time parameters
@ -90,7 +91,7 @@ class BeaconState(phase0.BeaconState):
```python
class SyncCommittee(Container):
pubkeys: Vector[BLSPubkey, SYNC_COMMITTEE_SIZE]
pubkeys_aggregate: BLSPubkey
pubkey_aggregates: Vector[BLSPubkey, SYNC_COMMITTEE_SIZE // SYNC_PUBKEY_AGGREGATION_INTERVAL]
```
## Helper functions
@ -130,7 +131,11 @@ def get_sync_committee(state: BeaconState, epoch: Epoch) -> SyncCommittee:
indices = get_sync_committee_indices(state, epoch)
validators = [state.validators[index] for index in indices]
pubkeys = [validator.pubkey for validator in validators]
return SyncCommittee(pubkeys, bls.AggregatePKs(pubkeys))
aggregates = [
bls.AggregatePKs(pubkeys[i:i+SYNC_PUBKEY_AGGREGATION_INTERVAL])
for i in range(0, len(pubkeys), SYNC_PUBKEY_AGGREGATION_INTERVAL)
]
return SyncCommittee(pubkeys, aggregates)
```
### Block processing