def _add_attestations_root_to_block_lookup(db: DatabaseAPI,
block: BaseBeaconBlock) -> None:
root = block.signing_root
for index, attestation in enumerate(block.body.attestations):
attestation_key = AttestationKey(root, index)
db.set(
SchemaV1.make_attestation_root_to_block_lookup_key(
attestation.hash_tree_root),
ssz.encode(attestation_key),
)
def _get_attestation_key_by_root(
db: DatabaseAPI, attestation_root: Hash32) -> Tuple[Hash32, int]:
try:
encoded_key = db[
SchemaV1.make_attestation_root_to_block_lookup_key(
attestation_root)]
except KeyError:
raise AttestationRootNotFound(
"Attestation root {0} not found".format(
encode_hex(attestation_root)))
attestation_key = ssz.decode(encoded_key, sedes=AttestationKey)
return attestation_key.block_root, attestation_key.index
def attestation_exists(self, attestation_root: Hash32) -> bool:
lookup_key = SchemaV1.make_attestation_root_to_block_lookup_key(
attestation_root)
return self.exists(lookup_key)
