zk/include/nil/crypto3/zk/snark/systems/ppzksnark/r1cs_se_ppzksnark/verification_key.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2021 Mikhail Komarov <nemo@nil.foundation>
// Copyright (c) 2020-2021 Nikita Kaskov <nbering@nil.foundation>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_R1CS_SE_PPZKSNARK_VERIFICATION_KEY_HPP
#define CRYPTO3_R1CS_SE_PPZKSNARK_VERIFICATION_KEY_HPP
 
namespace nil {
    namespace crypto3 {
        namespace zk {
            namespace snark {
 
                using namespace algebra;
 
                template<typename CurveType>
                class r1cs_se_ppzksnark_verification_key {
                    typedef CurveType curve_type;
 
                    using g1_type = typename curve_type::template g1_type<>;
                    using g2_type = typename curve_type::template g2_type<>;
                public:
                    // H
                    typename g2_type::value_type H;
 
                    // G^{alpha}
                    typename g1_type::value_type G_alpha;
 
                    // H^{beta}
                    typename g2_type::value_type H_beta;
 
                    // G^{gamma}
                    typename g1_type::value_type G_gamma;
 
                    // H^{gamma}
                    typename g2_type::value_type H_gamma;
 
                    // G^{gamma * A_i(t) + (alpha + beta) * A_i(t)}
                    // for 0 <= i <= sap.num_inputs()
                    std::vector<typename g1_type::value_type> query;
 
                    r1cs_se_ppzksnark_verification_key() = default;
                    r1cs_se_ppzksnark_verification_key(const typename g2_type::value_type &H,
                                                       const typename g1_type::value_type &G_alpha,
                                                       const typename g2_type::value_type &H_beta,
                                                       const typename g1_type::value_type &G_gamma,
                                                       const typename g2_type::value_type &H_gamma,
                                                       std::vector<typename g1_type::value_type> &&query) :
                        H(H),
                        G_alpha(G_alpha), H_beta(H_beta), G_gamma(G_gamma), H_gamma(H_gamma),
                        query(std::move(query)) {};
 
                    std::size_t G1_size() const {
                        return 2 + query.size();
                    }
 
                    std::size_t G2_size() const {
                        return 3;
                    }
 
                    std::size_t size_in_bits() const {
                        return (G1_size() * g1_type::value_bits +
                                G2_size() * g2_type::value_bits);
                    }
 
                    bool operator==(const r1cs_se_ppzksnark_verification_key &other) const {
                        return (this->H == other.H && this->G_alpha == other.G_alpha && this->H_beta == other.H_beta &&
                                this->G_gamma == other.G_gamma && this->H_gamma == other.H_gamma &&
                                this->query == other.query);
                    }
                };
 
                template<typename CurveType>
                struct r1cs_se_ppzksnark_processed_verification_key {
 
                    typename CurveType::template g1_type<>::value_type G_alpha;
                    typename CurveType::template g2_type<>::value_type H_beta;
                    typename CurveType::gt_type::value_type G_alpha_H_beta_ml;
                    typename pairing::pairing_policy<CurveType>::g1_precomputed_type G_gamma_pc;
                    typename pairing::pairing_policy<CurveType>::g2_precomputed_type H_gamma_pc;
                    typename pairing::pairing_policy<CurveType>::g2_precomputed_type H_pc;
 
                    std::vector<typename CurveType::template g1_type<>::value_type> query;
 
                    bool operator==(const r1cs_se_ppzksnark_processed_verification_key &other) const {
                        return (this->G_alpha == other.G_alpha && this->H_beta == other.H_beta &&
                                this->G_alpha_H_beta_ml == other.G_alpha_H_beta_ml &&
                                this->G_gamma_pc == other.G_gamma_pc && this->H_gamma_pc == other.H_gamma_pc &&
                                this->H_pc == other.H_pc && this->query == other.query);
                    }
                };
            }    // namespace snark
        }        // namespace zk
    }            // namespace crypto3
}    // namespace nil
 
#endif    // CRYPTO3_R1CS_PPZKSNARK_BASIC_PROVER_HPP