docs: def db_snapshot_append(cls, cur, block_id, consensus_hash, ops_hash, timestamp):
          """
          Append hash info for the last block processed, and the time at which it was done.
          Meant to be executed as part of a transaction.
  
          Return True on success
          Raise an exception on invalid block number
          Abort on db error
          """
          
          query = 'INSERT INTO snapshots (block_id,consensus_hash,ops_hash,timestamp) VALUES (?,?,?,?);'
          args = (block_id,consensus_hash,ops_hash,timestamp)
          
          cls.db_query_execute(cur, query, args)
          return True