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] = 18691656569803771296244054523431852464958959799019013859007259692542121208304602539555350517075508287829753932558576476751900235650227380562700444433662761577027341858128610410779088384480737679672900770810745291515010467307990
19    // c1[2] = 41898490967918953402344214791240637128170709919953949071783502921025352812571106773058893763790338921418070971888253786114353726529584385201591605722013126468931404347949840543007986327743462853720628051692141265303114721689600
20    // c1[3] = 23206834398115182106100160267808784663211750120934935212776243228483231604266504233503543246714830633588317039329677309362453490879357004638891161288350364891904062489821230132228897943262725174047727280881395973788104254381611
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, "18691656569803771296244054523431852464958959799019013859007259692542121208304602539555350517075508287829753932558576476751900235650227380562700444433662761577027341858128610410779088384480737679672900770810745291515010467307990"),
27        field_new!(Fq, "41898490967918953402344214791240637128170709919953949071783502921025352812571106773058893763790338921418070971888253786114353726529584385201591605722013126468931404347949840543007986327743462853720628051692141265303114721689600"),
28        field_new!(Fq, "23206834398115182106100160267808784663211750120934935212776243228483231604266504233503543246714830633588317039329677309362453490879357004638891161288350364891904062489821230132228897943262725174047727280881395973788104254381611"),
29    ];
30}