// Copyright (c) 2020, Brandon Lehmann
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Inspired by the work of Sarang Noether at
// https://github.com/SarangNoether/skunkworks/tree/pybullet

#ifndef CRYPTO_RANGEPROOFS_BULLETPROOFS_H
#define CRYPTO_RANGEPROOFS_BULLETPROOFS_H

#include <types/crypto_bulletproof_t.h>

namespace Crypto::RangeProofs::Bulletproofs
{
    /**
     * Generates a Bulletproof range proof and the related pedersen commitments
     * for the given amounts and blinding factors
     * @param amounts
     * @param blinding_factors
     * @param N the number of bits (2^n) to prove
     * @return {proof, commitments}
     */
    std::tuple<crypto_bulletproof_t, std::vector<crypto_pedersen_commitment_t>> prove(
        const std::vector<uint64_t> &amounts,
        const std::vector<crypto_blinding_factor_t> &blinding_factors,
        size_t N = 64);

    /**
     * Performs batch verification of the range proofs provided for the provided
     * pedersen commitments to the given values
     * @param proofs
     * @param commitments[]
     * @param N the number of bits (2^n) to prove
     * @return
     */
    bool verify(
        const std::vector<crypto_bulletproof_t> &proofs,
        const std::vector<std::vector<crypto_pedersen_commitment_t>> &commitments,
        size_t N = 64);

    /**
     * Performs verification of the range proof provided for the provided
     * pedersen commitments to the given values
     * @param proof
     * @param commitments
     * @param N the number of bits (2^n) to prove
     * @return
     */
    bool verify(
        const crypto_bulletproof_t &proof,
        const std::vector<crypto_pedersen_commitment_t> &commitments,
        size_t N = 64);
} // namespace Crypto::RangeProofs::Bulletproofs


#endif // CRYPTO_RANGEPROOFS_BULLETPROOFS_H