PRSONA/prsona/inc/client.hpp

#ifndef __PRSONA_CLIENT_HPP
#define __PRSONA_CLIENT_HPP

#include <unordered_map>

#include "Curvepoint.hpp"
#include "Scalar.hpp"
#include "BGN.hpp"

class PrsonaClient {
    public:
        PrsonaClient(const BGNPublicKey& serverPublicKey, const Curvepoint& elGamalBlindGenerator);

        Curvepoint get_long_term_public_key() const;
        Curvepoint get_short_term_public_key() const;

        void receive_score(const Proof& pi, const EGCiphertext& score, const Scalar& newSeed);
        void make_votes(vector<CurveBipoint>& encryptedVotes, vector<Proof>& validVoteProofs, const vector<Scalar>& vote) const;
        
        Proof generate_reputation_proof() const;
        bool verify_reputation_proof(const Proof& pi, const Curvepoint& shortTermPublicKey) const;

    private:
        static const Curvepoint elGamalGenerator;
        const Curvepoint elGamalBlindGenerator;
        const BGNPublicKey serverPublicKey;
        
        Curvepoint currentFreshGenerator;
        EGCiphertext currentEncryptedScore;

        Scalar longTermPrivateKey;
        Scalar currentScore;

        Proof generate_vote_proof(const Scalar& vote) const;
        bool verify_score_proof(const Proof& pi) const;

        std::unordered_map<Curvepoint, Scalar, CurvepointHash> decryption_memoizer;
        Scalar max_checked;
}; 

#endif