code: func GetActiveIdentityKeys(chainID string) ([]string, int64, error) {
  	heights, err := GetHeights()
  	if err != nil {
  		return nil, -1, err
  	}
  	keys, err := GetActiveIdentityKeysAtHeight(chainID, heights.DirectoryBlockHeight)
  	return keys, heights.DirectoryBlockHeight, err
  }
docs: // GetActiveIdentityKeys returns the identity's public keys that were/are active at the highest saved block height,
  // along with that blockheight