1use crate::FieldExt;
 2use ecfft::{prepare_domain, prepare_matrices, GoodCurve, Matrix2x2};
 3
 4#[derive(Clone, Debug)]
 5pub struct ECFFTConfig<F: FieldExt> {
 6    pub domain: Vec<Vec<F>>,
 7    pub matrices: Vec<Vec<Matrix2x2<F>>>,
 8    pub inverse_matrices: Vec<Vec<Matrix2x2<F>>>,
 9}
10
11pub fn gen_config<F: FieldExt>(num_cols: usize) -> ECFFTConfig<F> {
12    assert!(num_cols.is_power_of_two());
13    let expansion_factor = 2;
14    let codeword_len = num_cols * expansion_factor;
15
16    let k = (codeword_len as f64).log2() as usize;
17
18    let good_curve = GoodCurve::find_k(k);
19    let domain = prepare_domain(good_curve);
20    let (matrices, inverse_matrices) = prepare_matrices(&domain);
21
22    ECFFTConfig {
23        domain,
24        matrices,
25        inverse_matrices,
26    }
27}