async def list_blocks(self, request):
"""Fetches list of blocks from validator, optionally filtered by id.
Request:
query:
- head: The id of the block to use as the head of the chain
- id: Comma separated list of block ids to include in results
Response:
data: JSON array of fully expanded Block objects
head: The head used for this query (most recent if unspecified)
link: The link to this exact query, including head block
paging: Paging info and nav, like total resources and a next link
"""
paging_controls = self._get_paging_controls(request)
validator_query = client_block_pb2.ClientBlockListRequest(
head_id=self._get_head_id(request),
block_ids=self._get_filter_ids(request),
sorting=self._get_sorting_message(request, "block_num"),
paging=self._make_paging_message(paging_controls))
response = await self._query_validator(
Message.CLIENT_BLOCK_LIST_REQUEST,
client_block_pb2.ClientBlockListResponse,
validator_query)
return self._wrap_paginated_response(
request=request,
response=response,
controls=paging_controls,
data=[self._expand_block(b) for b in response['blocks']])
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'],
)