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handle when no attestations availble for crosslinking (#717)

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Danny Ryan 2019-03-04 17:56:50 -07:00 committed by vbuterin
parent 66105b01e4
commit 47cca60148
1 changed files with 7 additions and 3 deletions
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10
specs/core/0_beacon-chain.md
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@ -2056,12 +2056,16 @@ def get_winning_root_and_participants(state: BeaconState, shard: Shard) -> Tuple
a for a in all_attestations if a.data.latest_crosslink == state.latest_crosslinks[shard]
]
all_roots = [a.data.crosslink_data_root for a in valid_attestations]
# handle when no attestations for shard available
if len(all_roots) == 0:
return ZERO_HASH, []
def get_attestations_for(root) -> List[PendingAttestation]:
return [a for a in valid_attestations if a.data.crosslink_data_root == root]
winning_root = max(all_roots, key=lambda r: get_attesting_balance(state, get_attestations_for(r)))
return winning_root, get_attesting_indices(state, get_attestations_for(winning_root))
```