Struct ark_bls12_381::FrParameters

pub struct FrParameters;

Trait Implementations

impl FftParameters for FrParameters

type BigInt = BigInteger

const TWO_ADICITY: u32

Let N be the size of the multiplicative group defined by the field. Then TWO_ADICITY is the two-adicity of N, i.e. the integer s such that N = 2^s * t for some odd integer t.

const TWO_ADIC_ROOT_OF_UNITY: BigInteger

2^s root of unity computed by GENERATOR^t

pub const SMALL_SUBGROUP_BASE: Option<u32>

An integer b such that there exists a multiplicative subgroup of size b^k for some integer k.

pub const SMALL_SUBGROUP_BASE_ADICITY: Option<u32>

The integer k such that there exists a multiplicative subgroup of size Self::SMALL_SUBGROUP_BASE^k.

pub const LARGE_SUBGROUP_ROOT_OF_UNITY: Option<Self::BigInt>

GENERATOR^((MODULUS-1) / (2^s * SMALL_SUBGROUP_BASE^SMALL_SUBGROUP_BASE_ADICITY)) Used for mixed-radix FFT.

impl Fp256Parameters for FrParameters

impl FpParameters for FrParameters

const MODULUS: BigInteger

MODULUS = 52435875175126190479447740508185965837690552500527637822603658699938581184513

const MODULUS_BITS: u32

The number of bits needed to represent the Self::MODULUS.

const CAPACITY: u32

The number of bits that can be reliably stored. (Should equal SELF::MODULUS_BITS - 1)

const REPR_SHAVE_BITS: u32

The number of bits that must be shaved from the beginning of the representation when randomly sampling.

const R: BigInteger

R = 10920338887063814464675503992315976177888879664585288394250266608035967270910

const R2: BigInteger

R2 = R^2 % Self::MODULUS

const INV: u64

INV = -MODULUS^{-1} mod 2^64

const GENERATOR: BigInteger

GENERATOR = 7 Encoded in Montgomery form, so the value here is 7 * R % q = 24006497034320510773280787438025867407531605151569380937148207556313189711857

const MODULUS_MINUS_ONE_DIV_TWO: BigInteger

(Self::MODULUS - 1) / 2

const T: BigInteger

t for 2^s * t = MODULUS - 1, and t coprime to 2.

const T_MINUS_ONE_DIV_TWO: BigInteger

(t - 1) / 2