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use blake2b_simd::Params as Blake2bParams;
use group::ff::Field;
use crate::arithmetic::{CurveAffine, FieldExt};
use crate::poly::{
Coeff, EvaluationDomain, ExtendedLagrangeCoeff, LagrangeCoeff, PinnedEvaluationDomain,
Polynomial,
};
use crate::transcript::{ChallengeScalar, EncodedChallenge, Transcript};
mod assigned;
mod circuit;
mod error;
mod keygen;
mod lookup;
pub(crate) mod permutation;
mod vanishing;
mod prover;
mod verifier;
pub use assigned::*;
pub use circuit::*;
pub use error::*;
pub use keygen::*;
pub use prover::*;
pub use verifier::*;
use std::io;
#[derive(Clone, Debug)]
pub struct VerifyingKey<C: CurveAffine> {
domain: EvaluationDomain<C::Scalar>,
fixed_commitments: Vec<C>,
permutation: permutation::VerifyingKey<C>,
cs: ConstraintSystem<C::Scalar>,
cs_degree: usize,
transcript_repr: C::Scalar,
}
impl<C: CurveAffine> VerifyingKey<C> {
fn from_parts(
domain: EvaluationDomain<C::Scalar>,
fixed_commitments: Vec<C>,
permutation: permutation::VerifyingKey<C>,
cs: ConstraintSystem<C::Scalar>,
) -> Self {
let cs_degree = cs.degree();
let mut vk = Self {
domain,
fixed_commitments,
permutation,
cs,
cs_degree,
transcript_repr: C::Scalar::zero(),
};
let mut hasher = Blake2bParams::new()
.hash_length(64)
.personal(b"Halo2-Verify-Key")
.to_state();
let s = format!("{:?}", vk.pinned());
hasher.update(&(s.len() as u64).to_le_bytes());
hasher.update(s.as_bytes());
vk.transcript_repr = C::Scalar::from_bytes_wide(hasher.finalize().as_array());
vk
}
pub fn hash_into<E: EncodedChallenge<C>, T: Transcript<C, E>>(
&self,
transcript: &mut T,
) -> io::Result<()> {
transcript.common_scalar(self.transcript_repr)?;
Ok(())
}
pub fn pinned(&self) -> PinnedVerificationKey<'_, C> {
PinnedVerificationKey {
base_modulus: C::Base::MODULUS,
scalar_modulus: C::Scalar::MODULUS,
domain: self.domain.pinned(),
fixed_commitments: &self.fixed_commitments,
permutation: &self.permutation,
cs: self.cs.pinned(),
}
}
}
#[allow(dead_code)]
#[derive(Debug)]
pub struct PinnedVerificationKey<'a, C: CurveAffine> {
base_modulus: &'static str,
scalar_modulus: &'static str,
domain: PinnedEvaluationDomain<'a, C::Scalar>,
cs: PinnedConstraintSystem<'a, C::Scalar>,
fixed_commitments: &'a Vec<C>,
permutation: &'a permutation::VerifyingKey<C>,
}
#[derive(Clone, Debug)]
pub struct ProvingKey<C: CurveAffine> {
vk: VerifyingKey<C>,
l0: Polynomial<C::Scalar, ExtendedLagrangeCoeff>,
l_blind: Polynomial<C::Scalar, ExtendedLagrangeCoeff>,
l_last: Polynomial<C::Scalar, ExtendedLagrangeCoeff>,
fixed_values: Vec<Polynomial<C::Scalar, LagrangeCoeff>>,
fixed_polys: Vec<Polynomial<C::Scalar, Coeff>>,
fixed_cosets: Vec<Polynomial<C::Scalar, ExtendedLagrangeCoeff>>,
permutation: permutation::ProvingKey<C>,
}
impl<C: CurveAffine> ProvingKey<C> {
pub fn get_vk(&self) -> &VerifyingKey<C> {
&self.vk
}
}
impl<C: CurveAffine> VerifyingKey<C> {
pub fn get_domain(&self) -> &EvaluationDomain<C::Scalar> {
&self.domain
}
}
#[derive(Clone, Copy, Debug)]
struct Theta;
type ChallengeTheta<F> = ChallengeScalar<F, Theta>;
#[derive(Clone, Copy, Debug)]
struct Beta;
type ChallengeBeta<F> = ChallengeScalar<F, Beta>;
#[derive(Clone, Copy, Debug)]
struct Gamma;
type ChallengeGamma<F> = ChallengeScalar<F, Gamma>;
#[derive(Clone, Copy, Debug)]
struct Y;
type ChallengeY<F> = ChallengeScalar<F, Y>;
#[derive(Clone, Copy, Debug)]
struct X;
type ChallengeX<F> = ChallengeScalar<F, X>;