merge_prover.hpp

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// === AUDIT STATUS ===
// internal:    { status: Complete, auditors: [Sergei], commit: }
// external_1:  { status: not started, auditors: [], commit: }
// external_2:  { status: not started, auditors: [], commit: }
// =====================
 
#pragma once
 
#include "barretenberg/commitment_schemes/claim.hpp"
#include "barretenberg/flavor/mega_flavor.hpp"
#include "barretenberg/flavor/ultra_flavor.hpp"
#include "barretenberg/honk/proof_system/types/proof.hpp"
#include "barretenberg/op_queue/ecc_op_queue.hpp"
#include "barretenberg/transcript/transcript.hpp"
 
namespace bb {
 
class MergeProver {
    using Curve = curve::BN254;
    using FF = Curve::ScalarField;
    using Commitment = Curve::AffineElement;
    using Polynomial = bb::Polynomial<FF>;
    using CommitmentKey = bb::CommitmentKey<Curve>;
    using PCS = KZG<Curve>;
    using OpeningClaim = ProverOpeningClaim<Curve>;
    using OpeningPair = bb::OpeningPair<Curve>;
    using Transcript = NativeTranscript;
 
  public:
    using MergeProof = std::vector<FF>;
 
    explicit MergeProver(const std::shared_ptr<ECCOpQueue>& op_queue,
                         std::shared_ptr<Transcript> transcript,
                         MergeSettings settings = MergeSettings::PREPEND);
 
    BB_PROFILE MergeProof construct_proof();
 
    // Public for test access (computing commitments)
    CommitmentKey pcs_commitment_key;
 
  private:
    std::shared_ptr<Transcript> transcript;
    std::shared_ptr<ECCOpQueue> op_queue;
    MergeSettings settings;
 
    static constexpr size_t NUM_WIRES = MegaExecutionTraceBlocks::NUM_WIRES;
    std::vector<std::string> labels_degree_check = { "LEFT_TABLE_DEGREE_CHECK_0",
                                                     "LEFT_TABLE_DEGREE_CHECK_1",
                                                     "LEFT_TABLE_DEGREE_CHECK_2",
                                                     "LEFT_TABLE_DEGREE_CHECK_3" };
 
    std::vector<std::string> labels_shplonk_batching_challenges = {
        "SHPLONK_MERGE_BATCHING_CHALLENGE_0",  "SHPLONK_MERGE_BATCHING_CHALLENGE_1",
        "SHPLONK_MERGE_BATCHING_CHALLENGE_2",  "SHPLONK_MERGE_BATCHING_CHALLENGE_3",
        "SHPLONK_MERGE_BATCHING_CHALLENGE_4",  "SHPLONK_MERGE_BATCHING_CHALLENGE_5",
        "SHPLONK_MERGE_BATCHING_CHALLENGE_6",  "SHPLONK_MERGE_BATCHING_CHALLENGE_7",
        "SHPLONK_MERGE_BATCHING_CHALLENGE_8",  "SHPLONK_MERGE_BATCHING_CHALLENGE_9",
        "SHPLONK_MERGE_BATCHING_CHALLENGE_10", "SHPLONK_MERGE_BATCHING_CHALLENGE_11",
        "SHPLONK_MERGE_BATCHING_CHALLENGE_12"
    };
 
    static Polynomial compute_degree_check_polynomial(const std::array<Polynomial, NUM_WIRES>& left_table,
                                                      const std::vector<FF>& degree_check_challenges);
 
    static Polynomial compute_shplonk_batched_quotient(const std::array<Polynomial, NUM_WIRES>& left_table,
                                                       const std::array<Polynomial, NUM_WIRES>& right_table,
                                                       const std::array<Polynomial, NUM_WIRES>& merged_table,
                                                       const std::vector<FF>& shplonk_batching_challenges,
                                                       const FF& kappa,
                                                       const FF& kappa_inv,
                                                       const Polynomial& reversed_batched_left_tables,
                                                       const std::vector<FF>& evals);
 
    static OpeningClaim compute_shplonk_opening_claim(Polynomial& shplonk_batched_quotient,
                                                      const FF& shplonk_opening_challenge,
                                                      const std::array<Polynomial, NUM_WIRES>& left_table,
                                                      const std::array<Polynomial, NUM_WIRES>& right_table,
                                                      const std::array<Polynomial, NUM_WIRES>& merged_table,
                                                      const std::vector<FF>& shplonk_batching_challenges,
                                                      const FF& kappa,
                                                      const FF& kappa_inv,
                                                      Polynomial& reversed_batched_left_tables,
                                                      const std::vector<FF>& evals);
};
 
} // namespace bb