a55c186a74
This changes libsnark to build in-place, instead of copying first to a build directory. Previously, modifications made to the original sources wouldn't get rebuilt without a 'make clean' because users would be pointing to the copies. This closes #2689.
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
/** @file
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*****************************************************************************
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Declaration of interfaces for:
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- a knowledge commitment, and
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- a knowledge commitment vector.
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*****************************************************************************
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* @author This file is part of libsnark, developed by SCIPR Lab
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* and contributors (see AUTHORS).
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* @copyright MIT license (see LICENSE file)
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*****************************************************************************/
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#ifndef KNOWLEDGE_COMMITMENT_HPP_
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#define KNOWLEDGE_COMMITMENT_HPP_
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#include "algebra/fields/fp.hpp"
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#include "common/data_structures/sparse_vector.hpp"
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namespace libsnark {
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/********************** Knowledge commitment *********************************/
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/**
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* A knowledge commitment is a pair (g,h) where g is in T1 and h in T2,
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* and T1 and T2 are groups (written additively).
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*
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* Such pairs form a group by defining:
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* - "zero" = (0,0)
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* - "one" = (1,1)
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* - a * (g,h) + b * (g',h') := ( a * g + b * g', a * h + b * h').
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*/
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template<typename T1, typename T2>
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struct knowledge_commitment {
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T1 g;
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T2 h;
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knowledge_commitment<T1,T2>() = default;
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knowledge_commitment<T1,T2>(const knowledge_commitment<T1,T2> &other) = default;
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knowledge_commitment<T1,T2>(knowledge_commitment<T1,T2> &&other) = default;
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knowledge_commitment<T1,T2>(const T1 &g, const T2 &h);
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knowledge_commitment<T1,T2>& operator=(const knowledge_commitment<T1,T2> &other) = default;
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knowledge_commitment<T1,T2>& operator=(knowledge_commitment<T1,T2> &&other) = default;
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knowledge_commitment<T1,T2> operator+(const knowledge_commitment<T1, T2> &other) const;
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bool is_zero() const;
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bool operator==(const knowledge_commitment<T1,T2> &other) const;
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bool operator!=(const knowledge_commitment<T1,T2> &other) const;
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static knowledge_commitment<T1,T2> zero();
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static knowledge_commitment<T1,T2> one();
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void print() const;
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static size_t size_in_bits();
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};
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template<typename T1, typename T2, mp_size_t m>
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knowledge_commitment<T1,T2> operator*(const bigint<m> &lhs, const knowledge_commitment<T1,T2> &rhs);
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template<typename T1, typename T2, mp_size_t m, const bigint<m> &modulus_p>
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knowledge_commitment<T1,T2> operator*(const Fp_model<m, modulus_p> &lhs, const knowledge_commitment<T1,T2> &rhs);
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template<typename T1,typename T2>
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std::ostream& operator<<(std::ostream& out, const knowledge_commitment<T1,T2> &kc);
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template<typename T1,typename T2>
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std::istream& operator>>(std::istream& in, knowledge_commitment<T1,T2> &kc);
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/******************** Knowledge commitment vector ****************************/
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/**
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* A knowledge commitment vector is a sparse vector of knowledge commitments.
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*/
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template<typename T1, typename T2>
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using knowledge_commitment_vector = sparse_vector<knowledge_commitment<T1, T2> >;
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} // libsnark
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#include "algebra/knowledge_commitment/knowledge_commitment.tcc"
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#endif // KNOWLEDGE_COMMITMENT_HPP_
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