code: func Base(secretkey *[Size]byte) *[Size]byte {
  	dst := new([Size]byte)
  	curve25519.ScalarBaseMult(dst, secretkey)
  	return dst
  }
docs: // Base returns the product in*base where dst and base are the x coordinates of
  // group points, base is the standard generator and all values are in
  // little-endian form.