toNiels method
Converts this point to its Niels representation for faster arithmetic.
Implementation
@override
JubJubNielsNativePoint toNiels() {
final d2 = JubJubNativeFq.edwardsD2();
return JubJubNielsNativePoint(
vPlusU: v + u,
vMinusU: v - u,
z: z,
t2d: t1 * t2 * d2,
);
}