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Add comment about INVALID block

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Paul Hauner 2022-01-12 16:43:36 +11:00
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sync/optimistic.md
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@ -47,6 +47,7 @@ def is_optimistic(store: Store, block: BeaconBlock) -> bool:
```python ```python
def latest_verified_ancestor(store: Store, block: BeaconBlock) -> BeaconBlock: def latest_verified_ancestor(store: Store, block: BeaconBlock) -> BeaconBlock:
# It is assumed that the `block` parameter is never an INVALID block.
while True: while True:
if not is_optimistic(store, block) or block.parent_root == Root(): if not is_optimistic(store, block) or block.parent_root == Root():
return block return block