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eth2.0-specs
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Justin 2020-11-25 11:59:01 +00:00 committed by GitHub
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specs/lightclient/beacon-chain.md
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@ -48,7 +48,7 @@ This is a standalone beacon chain patch adding light client support via sync com
| Name | Value |
| - | - |
| `SYNC_COMMITTEE_SIZE` | `uint64(2**10)` (= 1024) |
| `SYNC_PUBKEY_AGGREGATION_INTERVAL` | `uint64(2**6)` (= 64) |
| `SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE` | `uint64(2**6)` (= 64) |
### Time parameters
@ -70,7 +70,7 @@ This is a standalone beacon chain patch adding light client support via sync com
```python
class BeaconBlockBody(phase0.BeaconBlockBody):
# Light client
# Sync committee aggregate signature
sync_committee_bits: Bitvector[SYNC_COMMITTEE_SIZE]
sync_committee_signature: BLSSignature
```
@ -79,7 +79,7 @@ class BeaconBlockBody(phase0.BeaconBlockBody):
```python
class BeaconState(phase0.BeaconState):
# Light client
# Sync committees
current_sync_committee: SyncCommittee
next_sync_committee: SyncCommittee
```
@ -91,7 +91,7 @@ class BeaconState(phase0.BeaconState):
```python
class SyncCommittee(Container):
pubkeys: Vector[BLSPubkey, SYNC_COMMITTEE_SIZE]
pubkey_aggregates: Vector[BLSPubkey, SYNC_COMMITTEE_SIZE // SYNC_PUBKEY_AGGREGATION_INTERVAL]
pubkey_aggregates: Vector[BLSPubkey, SYNC_COMMITTEE_SIZE // SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE]
```
## Helper functions
@ -132,8 +132,8 @@ def get_sync_committee(state: BeaconState, epoch: Epoch) -> SyncCommittee:
validators = [state.validators[index] for index in indices]
pubkeys = [validator.pubkey for validator in validators]
aggregates = [
bls.AggregatePKs(pubkeys[i:i+SYNC_PUBKEY_AGGREGATION_INTERVAL])
for i in range(0, len(pubkeys), SYNC_PUBKEY_AGGREGATION_INTERVAL)
bls.AggregatePKs(pubkeys[i:i + SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE])
for i in range(0, len(pubkeys), SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE)
]
return SyncCommittee(pubkeys, aggregates)
```