1use crate::fields::{fp2::Fp2Var, quadratic_extension::*};
 2use ark_ff::fields::{Fp4Parameters, Fp4ParamsWrapper, QuadExtParameters};
 3
 4/// A quartic extension field constructed as the tower of a
 5/// quadratic extension over a quadratic extension field.
 6/// This is the R1CS equivalent of `ark_ff::Fp4<P>`.
 7pub type Fp4Var<P> = QuadExtVar<Fp2Var<<P as Fp4Parameters>::Fp2Params>, Fp4ParamsWrapper<P>>;
 8
 9impl<P: Fp4Parameters> QuadExtVarParams<Fp2Var<P::Fp2Params>> for Fp4ParamsWrapper<P> {
10    fn mul_base_field_var_by_frob_coeff(fe: &mut Fp2Var<P::Fp2Params>, power: usize) {
11        fe.c0 *= Self::FROBENIUS_COEFF_C1[power % Self::DEGREE_OVER_BASE_PRIME_FIELD];
12        fe.c1 *= Self::FROBENIUS_COEFF_C1[power % Self::DEGREE_OVER_BASE_PRIME_FIELD];
13    }
14}