twice property

CompletedGroupElement twice

Implementation

CompletedGroupElement get twice {
  CompletedGroupElement r = CompletedGroupElement(
    X: X.squared,
    Y: X + Y,
    Z: Y.squared,
    T: Z.squaredMultiply2,
  );
  var t0 = r.Y.squared;
  r.Y = r.Z + r.X;
  r.Z = r.Z - r.X;
  r.X = t0 - r.Y;
  r.T = r.T - r.Z;
  return r;
}