code: def is_name_zonefile_hash(name, zonefile_hash, hostport=None, proxy=None):
      
      assert hostport or proxy, 'Need hostport or proxy'
      if proxy is None:
          proxy = connect_hostport(hostport)
  
      zonefile_check_schema = {
          'type': 'object',
          'properties': {
              'result': {
                  'type': 'boolean'
              }
          },
          'required': [ 'result' ]
      }
  
      schema = json_response_schema(zonefile_check_schema)
      resp = {}
      try:
          resp = proxy.is_name_zonefile_hash(name, zonefile_hash)
          resp = json_validate(schema, resp)
          if json_is_error(resp):
              return resp
  
      except ValidationError as e:
          if BLOCKSTACK_DEBUG:
              log.exception(e)
  
          resp = {'error': 'Server response did not match expected schema.  You are likely communicating with an out-of-date Blockstack node.', 'http_status': 502}
          return resp
  
      except socket.timeout:
          log.error("Connection timed out")
          resp = {'error': 'Connection to remote host timed out.', 'http_status': 503}
          return resp
  
      except socket.error as se:
          log.error("Connection error {}".format(se.errno))
          resp = {'error': 'Connection to remote host failed.', 'http_status': 502}
          return resp
  
      except Exception as ee:
          if BLOCKSTACK_DEBUG:
              log.exception(ee)
  
          log.error("Caught exception while connecting to Blockstack node: {}".format(ee))
          resp = {'error': 'Failed to contact Blockstack node.  Try again with `--debug`.', 'http_status': 500}
          return resp
  
      return {'result': resp['result']}
docs: Determine if a name set a given zone file hash.
      Return {'result': True/False} if so
      Return {'error': ...} on error