Function curve25519_dalek::edwards::vartime::double_scalar_mult_basepoint

pub fn double_scalar_mult_basepoint(
    a: &Scalar, 
    A: &EdwardsPoint, 
    b: &Scalar
) -> EdwardsPoint

Given a point \(A\) and scalars \(a\) and \(b\), compute the point \(aA+bB\), where \(B\) is the Ed25519 basepoint (i.e., \(B = (x,4/5)\) with x positive).