async def fetch_state(self, request):
"""Fetches data from a specific address in the validator's state tree.
Request:
query:
- head: The id of the block to use as the head of the chain
- address: The 70 character address of the data to be fetched
Response:
data: The base64 encoded binary data stored at that address
head: The head used for this query (most recent if unspecified)
link: The link to this exact query, including head block
"""
error_traps = [
error_handlers.InvalidAddressTrap,
error_handlers.StateNotFoundTrap]
address = request.match_info.get('address', '')
head = request.url.query.get('head', None)
head, root = await self._head_to_root(head)
response = await self._query_validator(
Message.CLIENT_STATE_GET_REQUEST,
client_state_pb2.ClientStateGetResponse,
client_state_pb2.ClientStateGetRequest(
state_root=root, address=address),
error_traps)
return self._wrap_response(
request,
data=response['value'],
metadata=self._get_metadata(request, response, head=head))
async def _get_state_by_addr(self,request,address):
LOGGER.debug('BgxRouteHandler:_get_state_by_addr %s',address)
state_address = make_smart_bgt_address(address)
error_traps = [error_handlers.InvalidAddressTrap] #,error_handlers.StateNotFoundTrap]
head = request.url.query.get('head', None)
head, root = await self._head_to_root(head)
response = await self._query_validator(
Message.CLIENT_STATE_GET_REQUEST,
client_state_pb2.ClientStateGetResponse,
client_state_pb2.ClientStateGetRequest(
state_root=root, address=state_address),
error_traps)
LOGGER.debug('BgxRouteHandler:_get_state_by_addr %s',address)
try:
result = cbor.loads(base64.b64decode(response['value']))
LOGGER.debug('BgxRouteHandler: _get_state_by_addr result=%s',type(result))
except BaseException:
LOGGER.debug('BgxRouteHandler: Cant get state FOR=%s',address)
return None
return result