code: func (a adapter) StartTime() (int64, error) {
  	var startTime int64
  
  	if len(a.db.Blocks()) > 0 {
  		startTime = a.db.Blocks()[0].Meta().MinTime
  	} else {
  		startTime = time.Now().Unix() * 1000
  	}
  
  	// Add a safety margin as it may take a few minutes for everything to spin up.
  	return startTime + a.startTimeMargin, nil
  }
docs: // StartTime implements the Storage interface.