def _get_canonical_block_hash(db: BaseDB, slot: int) -> Hash32:
validate_slot(slot)
slot_to_hash_key = SchemaV1.make_block_slot_to_hash_lookup_key(slot)
try:
encoded_key = db[slot_to_hash_key]
except KeyError:
raise BlockNotFound(
"No canonical block for block slot #{0}".format(slot))
else:
return rlp.decode(encoded_key, sedes=rlp.sedes.binary)
def _get_canonical_crystallized_state_root(db: BaseDB,
slot: int) -> Hash32:
validate_slot(slot)
slot_to_hash_key = SchemaV1.make_slot_to_crystallized_state_lookup_key(
slot)
try:
encoded_key = db[slot_to_hash_key]
except KeyError:
raise StateRootNotFound(
"No canonical crystallized state for slot #{0}".format(slot))
else:
return rlp.decode(encoded_key, sedes=rlp.sedes.binary)
def test_validate_slot(slot, is_valid):
if is_valid:
validate_slot(slot)
else:
with pytest.raises(ValidationError):
validate_slot(slot)
def _get_canonical_block_by_slot(cls, db: BaseDB,
slot: int) -> BaseBeaconBlock:
validate_slot(slot)
canonical_block_hash = cls._get_canonical_block_hash(db, slot)
return cls._get_block_by_hash(db, canonical_block_hash)
def _get_canonical_block_hash_by_slot(cls, db: BaseDB,
slot: int) -> Hash32:
validate_slot(slot)
return cls._get_canonical_block_hash(db, slot)