fn lagrange_commitment<F: FieldWitness>(
srs: &mut SRS<GroupAffine<F>>,
domain: &Domain,
i: usize,
) -> InnerCurve<F>
fn lagrange_commitment<F: FieldWitness>(
srs: &mut SRS<GroupAffine<F>>,
domain: &Domain,
i: usize,
) -> InnerCurve<F>