class PointEd25519 extends Point {

    public static PointEd25519 fromAffine(Coordinate x, Coordinate y) {
        return new PointEd25519(
                x.multiply(DEFAULT_Z).mod(),
                y.multiply(DEFAULT_Z).mod(),
                DEFAULT_Z,
                x.multiply(y).multiply(DEFAULT_Z).mod());
    }

      PointEd25519(Coordinate x, Coordinate y, Coordinate z, Coordinate t);

}