async def fetch_block(self, request):
"""Fetches a specific block from the validator, specified by id.
Request:
path:
- block_id: The 128-character id of the block to be fetched
Response:
data: A JSON object with the data from the fully expanded Block
link: The link to this exact query
"""
error_traps = [error_handlers.BlockNotFoundTrap]
block_id = request.match_info.get('block_id', '')
self._validate_id(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)
return self._wrap_response(
request,
data=self._expand_block(response['block']),
metadata=self._get_metadata(request, response))
async def _head_to_root(self, block_id):
error_traps = [error_handlers.BlockNotFoundTrap]
if block_id:
response = await self._messenger._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._messenger._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'],
)
