translator_verifier.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/pairing_points.hpp"
#include "barretenberg/goblin/translation_evaluations.hpp"
#include "barretenberg/honk/proof_system/types/proof.hpp"
#include "barretenberg/stdlib/primitives/pairing_points.hpp"
#include "barretenberg/stdlib/proof/proof.hpp"
#include "barretenberg/stdlib/translator_vm_verifier/translator_recursive_flavor.hpp"
#include "barretenberg/translator_vm/translator_flavor.hpp"
#include "barretenberg/translator_vm/translator_prover.hpp"
 
namespace bb {
 
template <typename Flavor> class TranslatorVerifier_ {
  public:
    using FF = typename Flavor::FF;
    using BF = typename Flavor::BF;
    using Curve = typename Flavor::Curve;
    using Commitment = typename Flavor::Commitment;
    using VerificationKey = typename Flavor::VerificationKey;
    using VerifierCommitments = typename Flavor::VerifierCommitments;
    using CommitmentLabels = typename Flavor::CommitmentLabels;
    using Transcript = typename Flavor::Transcript;
    using RelationParams = RelationParameters<FF>;
 
    static constexpr bool IsRecursive = Curve::is_stdlib_type;
    using Builder = std::conditional_t<IsRecursive, typename Flavor::CircuitBuilder, void>;
 
    // Use stdlib PairingPoints for recursive, native PairingPoints for native
    using PairingPoints =
        std::conditional_t<IsRecursive, stdlib::recursion::PairingPoints<Curve>, bb::PairingPoints<Curve>>;
 
    // Proof type: stdlib::Proof for recursive, HonkProof for native
    using Proof = std::conditional_t<IsRecursive, stdlib::Proof<Builder>, HonkProof>;
 
    struct ReductionResult {
        PairingPoints pairing_points;     // KZG pairing points for deferred verification
        bool reduction_succeeded = false; // Aggregate of sumcheck and consistency checks
    };
 
    TranslatorVerifier_(std::shared_ptr<Transcript> transcript,
                        const Proof& proof,
                        const BF& evaluation_input_x,
                        const BF& batching_challenge_v,
                        const BF& accumulated_result,
                        const std::array<Commitment, TranslatorFlavor::NUM_OP_QUEUE_WIRES>& op_queue_wire_commitments)
        : transcript(std::move(transcript))
        , proof(proof)
        , evaluation_input_x(evaluation_input_x)
        , batching_challenge_v(batching_challenge_v)
        , accumulated_result(accumulated_result)
        , op_queue_wire_commitments(op_queue_wire_commitments)
    {
        // Translator VK is constant
        auto native_vk = std::make_shared<TranslatorFlavor::VerificationKey>();
        if constexpr (IsRecursive) {
            builder = proof.back().get_context();
            key = std::make_shared<VerificationKey>(builder, native_vk);
            vk_hash = key->get_hash();
        } else {
            key = native_vk;
            vk_hash = native_vk->get_hash();
        }
    }
 
    [[nodiscard("Verification result should be checked")]] ReductionResult reduce_to_pairing_check();
 
    std::shared_ptr<VerificationKey> get_verification_key() const { return key; }
 
  private:
    std::shared_ptr<VerificationKey> key;
    FF vk_hash;
    std::shared_ptr<Transcript> transcript;
    Proof proof;
    RelationParams relation_parameters;
 
    // Translation inputs from ECCVM verifier
    BF evaluation_input_x;
    BF batching_challenge_v;
    BF accumulated_result;
    std::array<Commitment, TranslatorFlavor::NUM_OP_QUEUE_WIRES> op_queue_wire_commitments;
 
    // Builder pointer (only used for recursive, nullptr for native)
    std::conditional_t<IsRecursive, Builder*, void*> builder = nullptr;
 
    void put_translation_data_in_relation_parameters();
};
 
// Type aliases
using TranslatorVerifier = TranslatorVerifier_<TranslatorFlavor>;
using TranslatorRecursiveVerifier = TranslatorVerifier_<TranslatorRecursiveFlavor>;
 
} // namespace bb