code: def get_names_owned_by_address(address, proxy=None, hostport=None):
      
      assert proxy or hostport, 'Need proxy or hostport'
      if proxy is None:
          proxy = connect_hostport(hostport)
  
      owned_schema = {
          'type': 'object',
          'properties': {
              'names': {
                  'type': 'array',
                  'items': {
                      'type': 'string',
                      'uniqueItems': True
                  },
              },
          },
          'required': [
              'names',
          ],
      }
  
      schema = json_response_schema( owned_schema )
  
      resp = {}
      try:
          resp = proxy.get_names_owned_by_address(address)
          resp = json_validate(schema, resp)
          if json_is_error(resp):
              return resp
  
          # names must be valid
          for n in resp['names']:
              assert is_name_valid(str(n)), ('Invalid name "{}"'.format(str(n)))
  
      except ValidationError as ve:
          if BLOCKSTACK_DEBUG:
              log.exception(ve)
  
          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  You are likely communicating with an out-of-date Blockstack node.', 'http_status': 502}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 AssertionError as e:
          if BLOCKSTACK_DEBUG:
              log.exception(e)
  
          resp = {'error': 'Got an invalid name from the server'}
          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 resp['names']
docs: Get the names owned by an address.
      Returns the list of names on success
      Returns {'error': ...} on error