1use crate::{Fq, Fq2, Fq2Parameters, FQ_ONE, FQ_ZERO};
 2use ark_ff::{
 3    field_new,
 4    fields::fp4::{Fp4, Fp4Parameters},
 5};
 6
 7pub type Fq4 = Fp4<Fq4Parameters>;
 8
 9pub struct Fq4Parameters;
10
11impl Fp4Parameters for Fq4Parameters {
12    type Fp2Params = Fq2Parameters;
13
14    const NONRESIDUE: Fq2 = field_new!(Fq2, FQ_ZERO, FQ_ONE);
15
16    // Coefficients for the Frobenius automorphism.
17    // c1[0] = 1,
18    // c1[1] = 7684163245453501615621351552473337069301082060976805004625011694147890954040864167002308
19    // c1[2] = 475922286169261325753349249653048451545124879242694725395555128576210262817955800483758080
20    // c1[3] = 468238122923807824137727898100575114475823797181717920390930116882062371863914936316755773
21    //
22    // These are calculated as `FROBENIUS_COEFF_FP4_C1[i] = Fp2Params::NONRESIDUE^((q^i - 1) / 4)`.
23    #[rustfmt::skip]
24    const FROBENIUS_COEFF_FP4_C1: &'static [Fq] = &[
25        FQ_ONE,
26        field_new!(Fq, "7684163245453501615621351552473337069301082060976805004625011694147890954040864167002308"),
27        field_new!(Fq, "475922286169261325753349249653048451545124879242694725395555128576210262817955800483758080"),
28        field_new!(Fq, "468238122923807824137727898100575114475823797181717920390930116882062371863914936316755773"),
29    ];
30}