def _make_paging_message(controls):
"""Turns a raw paging controls dict into Protobuf ClientPagingControls.
"""
return client_list_control_pb2.ClientPagingControls(
start=controls.get('start', None),
limit=controls.get('limit', None))
async def _get_latest_block_id(self):
resp = await self._connection.send(
Message.CLIENT_BLOCK_LIST_REQUEST,
client_block_pb2.ClientBlockListRequest(
paging=client_list_control_pb2.ClientPagingControls(
limit=1)).SerializeToString())
block_list_resp = client_block_pb2.ClientBlockListResponse()
block_list_resp.ParseFromString(resp.content)
if block_list_resp.status != \
client_block_pb2.ClientBlockListResponse.OK:
LOGGER.error('Unable to fetch latest block id')
return block_list_resp.head_id
async def _head_to_root(self, block_id):
error_traps = [error_handlers.BlockNotFoundTrap]
if block_id:
response = await self._query_validator(
Message.CLIENT_BLOCK_GET_BY_ID_REQUEST,
client_block_pb2.ClientBlockGetResponse,
client_block_pb2.ClientBlockGetByIdRequest(block_id=block_id),
error_traps)
block = self._expand_block(response['block'])
else:
response = await self._query_validator(
Message.CLIENT_BLOCK_LIST_REQUEST,
client_block_pb2.ClientBlockListResponse,
client_block_pb2.ClientBlockListRequest(
paging=client_list_control_pb2.ClientPagingControls(
limit=1)), error_traps)
block = self._expand_block(response['blocks'][0])
return (
block['header_signature'],
block['header']['state_root_hash'],
)