Struct KZG10

pub struct KZG10<E: PairingEngine>(/* private fields */);

KZG10 is an implementation of the polynomial commitment scheme of Kate, Zaverucha and Goldbgerg

Implementations

impl<E: PairingEngine> KZG10<E>

pub fn load_srs(max_degree: usize) -> Result<UniversalParams<E>, PCError>

Constructs public parameters when given as input the maximum degree degree for the polynomial commitment scheme.

pub fn commit( powers: &Powers<'_, E>, polynomial: &Polynomial<'_, E::Fr>, hiding_bound: Option<usize>, rng: Option<&mut dyn RngCore>, ) -> Result<(KZGCommitment<E>, KZGRandomness<E>), PCError>

Outputs a commitment to polynomial.

pub fn commit_lagrange( lagrange_basis: &LagrangeBasis<'_, E>, evaluations: &[E::Fr], hiding_bound: Option<usize>, rng: Option<&mut dyn RngCore>, ) -> Result<(KZGCommitment<E>, KZGRandomness<E>), PCError>

Outputs a commitment to polynomial.

pub fn compute_witness_polynomial( polynomial: &DensePolynomial<E::Fr>, point: E::Fr, randomness: &KZGRandomness<E>, ) -> Result<(DensePolynomial<E::Fr>, Option<DensePolynomial<E::Fr>>), PCError>

Compute witness polynomial.

The witness polynomial w(x) the quotient of the division (p(x) - p(z)) / (x - z) Observe that this quotient does not change with z because p(z) is the remainder term. We can therefore omit p(z) when computing the quotient.

pub fn open_lagrange( lagrange_basis: &LagrangeBasis<'_, E>, domain_elements: &[E::Fr], evaluations: &[E::Fr], point: E::Fr, evaluation_at_point: E::Fr, ) -> Result<KZGProof<E>>

On input a polynomial p in Lagrange basis, and a point point, outputs an evaluation proof for the same.

pub fn open( powers: &Powers<'_, E>, polynomial: &DensePolynomial<E::Fr>, point: E::Fr, rand: &KZGRandomness<E>, ) -> Result<KZGProof<E>, PCError>

On input a polynomial p and a point point, outputs a proof for the same.

pub fn check( vk: &VerifierKey<E>, commitment: &KZGCommitment<E>, point: E::Fr, value: E::Fr, proof: &KZGProof<E>, ) -> Result<bool, PCError>

Verifies that value is the evaluation at point of the polynomial committed inside commitment.

pub fn batch_check<R: RngCore>( vk: &VerifierKey<E>, commitments: &[KZGCommitment<E>], points: &[E::Fr], values: &[E::Fr], proofs: &[KZGProof<E>], rng: &mut R, ) -> Result<bool>

Check that each proof_i in proofs is a valid proof of evaluation for commitment_i at point_i.

Trait Implementations

impl<E: Clone + PairingEngine> Clone for KZG10<E>

fn clone(&self) -> KZG10<E>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<E: Debug + PairingEngine> Debug for KZG10<E>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.