evaluation_domain.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2020-2021 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
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#ifndef CRYPTO3_MATH_EVALUATION_DOMAIN_HPP
#define CRYPTO3_MATH_EVALUATION_DOMAIN_HPP
 
#include <vector>
 
#include <nil/crypto3/multiprecision/integer.hpp>
 
namespace nil {
    namespace crypto3 {
        namespace math {
 
            template<typename FieldType>
            class evaluation_domain {
 
                typedef typename FieldType::value_type value_type;
 
            public:
                typedef FieldType field_type;
 
                value_type root;
                value_type root_inverse;
                value_type domain;
                value_type domain_inverse;
                value_type generator;
                value_type generator_inverse;
 
                std::size_t m;
                std::size_t log2_size;
                std::size_t generator_size;
 
                evaluation_domain(const std::size_t m) : m(m), log2_size(multiprecision::msb(m)) {};
 
                virtual value_type get_domain_element(const std::size_t idx) = 0;
 
                virtual void fft(std::vector<value_type> &a) = 0;
 
                virtual void inverse_fft(std::vector<value_type> &a) = 0;
 
                virtual std::vector<value_type> evaluate_all_lagrange_polynomials(const value_type &t) = 0;
 
                virtual value_type compute_vanishing_polynomial(const value_type &t) = 0;
 
                virtual void add_poly_z(const value_type &coeff, std::vector<value_type> &H) = 0;
 
                virtual void divide_by_z_on_coset(std::vector<value_type> &P) = 0;
            };
        }    // namespace math
    }        // namespace crypto3
}    // namespace nil
 
#endif    // ALGEBRA_FFT_EVALUATION_DOMAIN_HPP