def _load_justified_head(self) -> None:
encoded_epoch = self.db.get(
SchemaV1.make_justified_head_epoch_lookup_key())
if not encoded_epoch:
self._highest_justified_epoch = GENESIS_EPOCH
return
self._highest_justified_epoch = ssz.decode(encoded_epoch, ssz.uint64)
def _update_justified_head(self, justified_root: Root,
epoch: Epoch) -> None:
"""
Unconditionally write the ``justified_root`` as the root of the highest
justified block.
"""
self.db.set(SchemaV1.make_justified_head_root_lookup_key(),
justified_root)
self.db.set(
SchemaV1.make_justified_head_epoch_lookup_key(),
ssz.encode(epoch, ssz.uint64),
)
