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 _add_block_slot_to_hash_lookup(db: BaseDB,
block: BaseBeaconBlock) -> None:
"""
Set a record in the database to allow looking up this block by its
block slot.
"""
block_slot_to_hash_key = SchemaV1.make_block_slot_to_hash_lookup_key(
block.slot_number)
db.set(
block_slot_to_hash_key,
rlp.encode(block.hash, sedes=rlp.sedes.binary),
)
def test_chaindb_add_block_number_to_hash_lookup(chaindb, block):
block_slot_to_hash_key = SchemaV1.make_block_slot_to_hash_lookup_key(
block.slot)
assert not chaindb.exists(block_slot_to_hash_key)
chaindb.persist_block(block)
assert chaindb.exists(block_slot_to_hash_key)