code: def get_or_instantiate_db_state(working_dir):
      
  
      # instantiates
      new_db = BlockstackDB.borrow_readwrite_instance(working_dir, -1)
      BlockstackDB.release_readwrite_instance(new_db, -1)
  
      return get_db_state(working_dir)
docs: Get a read-only handle to the DB.
      Instantiate it first if it doesn't exist.
  
      DO NOT CALL WHILE INDEXING
  
      Returns the handle on success
      Raises on error