package octez-plonk

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Module type
Class type
include Aggregation.Polynomial_protocol.S with module PC := PC
include Plonk.Polynomial_protocol.S with module PC := PC
type prover_public_parameters = PC.Public_parameters.prover

The type of prover public parameters.

val prover_public_parameters_t : prover_public_parameters Repr.t
type verifier_public_parameters = PC.Public_parameters.verifier

The type of verifier public parameters.

val verifier_public_parameters_t : verifier_public_parameters Repr.t
type transcript = PC.transcript

The type for transcripts, used for applying the Fiat-Shamir heuristic

val transcript_t : transcript Repr.t
type proof = {
  1. cm_t : PC.Commitment.t;
  2. pc_proof : PC.proof;
  3. pc_answers : PC.answer list;

The type for proofs, containing a commitment to the polynomial T that asserts the satisfiability of the identities over the subset of interest, as well as a PC proof and a list of PC answers.

val proof_t : proof Repr.t

The polynomial commitment setup function, requires a labeled argument of setup parameters for the underlying PC and a labeled argument containing the path location of a set of SRS files.

val prove : prover_public_parameters -> transcript -> n:int -> generator:Plonk.Bls.Scalar.t -> secrets:(Plonk.Bls.Poly.t Plonk.SMap.t * PC.Commitment.prover_aux) list -> eval_points:Plonk.Identities.eval_point list list -> evaluations:Plonk.Bls.Evaluations.t Plonk.SMap.t -> identities:Plonk.Identities.prover_identities -> nb_of_t_chunks:int -> proof * transcript

The prover function. Takes as input the prover_public_parameters, an initial transcript (possibly including a context if this prove is used as a building block of a bigger protocol), the size n of subgroup H, the canonical generator of subgroup H, a list of secrets including polynomials that have supposedly been committed (and a verifier received such commitments) as well as prover auxiliary information generated during the committing process, a list of evaluation point lists specifying the evaluation points where each secret needs to be evaluated at, a map of the above-mentioned polynomials this time in FFT evaluations form, for efficient polynomial multiplication, and some prover_identities that are supposedly satisfied by the secret polynomials. Outputs a proof and an updated transcript.

val verify : verifier_public_parameters -> transcript -> n:int -> generator:Plonk.Bls.Scalar.t -> commitments:PC.Commitment.t list -> eval_points:Plonk.Identities.eval_point list list -> identities:Plonk.Identities.verifier_identities -> proof -> bool * transcript

The verifier function. Takes as input the verifier_public_parameters, an initial transcript (that should coincide with the initial transcript used by prove), the size n of subgroup H, the canonical generator of subgroup H, a list of commitments to the secret polynomials by the prover, a list of evaluation points as in prove, some verifier_identities, and a proof. Outputs a bool value representing acceptance or rejection.

type verifier_aux = {
  1. alpha : Plonk.Bls.Scalar.t;
  2. x : Plonk.Bls.Scalar.t;
  3. r : Plonk.Bls.Scalar.t;

Auxiliary information needed by the verifier for the meta-verification in aPlonK

compute_t ~n ~alpha evaluations returns a polynomial T splitted in chunks, where T(X) = (sum_i alpha^i evaluations[i]) / (X^n - 1) and the returned chunks { 'T_0' -> T0; 'T_1' -> T1; 'T_2' -> T2 } are such that T = T0 + X^n T1 + X^{2n} T2.