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// Copyright (c) 2017-2021, The Monero Project
//
// All rights reserved.
//
// 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
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// 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.
#pragma once
#include "crypto/crypto.h"
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "ringct/rctTypes.h"
#include <unordered_map>
#include <unordered_set>
#include <vector>
namespace cryptonote { struct account_keys; }
namespace multisig
{
/**
* @brief get_multisig_blinded_secret_key - converts an input private key into a blinded multisig private key
* Use 1a: converts account private spend key into multisig private key, which is used for key exchange and message signing
* Use 1b: converts account private view key into ancillary private key share, for the composite multisig private view key
* Use 2: converts DH shared secrets (curve points) into private keys, which are intermediate private keys in multisig key exchange
* @param key - private key to transform
* @return transformed private key
*/
crypto::secret_key get_multisig_blinded_secret_key(const crypto::secret_key &key);
bool generate_multisig_key_image(const cryptonote::account_keys &keys,
std::size_t multisig_key_index,
const crypto::public_key& out_key,
crypto::key_image& ki);
void generate_multisig_LR(const crypto::public_key pkey,
const crypto::secret_key &k,
crypto::public_key &L,
crypto::public_key &R);
bool generate_multisig_composite_key_image(const cryptonote::account_keys &keys,
const std::unordered_map<crypto::public_key, cryptonote::subaddress_index> &subaddresses,
const crypto::public_key &out_key,
const crypto::public_key &tx_public_key,
const std::vector<crypto::public_key> &additional_tx_public_keys,
std::size_t real_output_index,
const std::vector<crypto::key_image> &pkis,
crypto::key_image &ki);
} //namespace multisig
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