// Copyright (c) 2019-2021 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_SIGNET_H

#define BITCOIN_SIGNET_H

#include <consensus/params.h>

#include <primitives/block.h>

#include <primitives/transaction.h>

#include <optional>

/**

 * Extract signature and check whether a block has a valid solution

 */

bool CheckSignetBlockSolution(const CBlock& block, const Consensus::Params& consensusParams);

/**

 * Generate the signet tx corresponding to the given block

 *

 * The signet tx commits to everything in the block except:

 * 1. It hashes a modified merkle root with the signet signature removed.

 * 2. It skips the nonce.

 */

class SignetTxs {

    template<class T1, class T2>

    SignetTxs(const T1& to_spend, const T2& to_sign) : m_to_spend{to_spend}, m_to_sign{to_sign} { }

public:

    static std::optional<SignetTxs> Create(const CBlock& block, const CScript& challenge);

    const CTransaction m_to_spend;

    const CTransaction m_to_sign;

};

#endif // BITCOIN_SIGNET_H