package db func (d *DB) SaveLastTimeUs(lastTimeUs int64) error { _, err := d.db.Exec(`update _jetstream set last_time_us = ?`, lastTimeUs) return err } func (d *DB) GetLastTimeUs() (int64, error) { var lastTimeUs int64 row := d.db.QueryRow(`select last_time_us from _jetstream`) err := row.Scan(&lastTimeUs) return lastTimeUs, err }