solver.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

// The Solver functions are used by policy and the wallet, but not consensus.

#ifndef BITCOIN_SCRIPT_SOLVER_H
#define BITCOIN_SCRIPT_SOLVER_H

#include <attributes.h>
#include <script/script.h>
#include <span.h>

#include <string>
#include <optional>
#include <utility>
#include <vector>

class CPubKey;

enum class TxoutType {
    NONSTANDARD,
    // 'standard' transaction types:
    ANCHOR, 
    PUBKEY,
    PUBKEYHASH,
    SCRIPTHASH,
    MULTISIG,
    NULL_DATA, 
    WITNESS_V0_SCRIPTHASH,
    WITNESS_V0_KEYHASH,
    WITNESS_V1_TAPROOT,
    WITNESS_UNKNOWN, 
};

std::string GetTxnOutputType(TxoutType t);

constexpr bool IsPushdataOp(opcodetype opcode)
{
    return opcode > OP_FALSE && opcode <= OP_PUSHDATA4;
}

TxoutType Solver(const CScript& scriptPubKey, std::vector<std::vector<unsigned char>>& vSolutionsRet);

CScript GetScriptForRawPubKey(const CPubKey& pubkey);

std::optional<std::pair<int, std::vector<Span<const unsigned char>>>> MatchMultiA(const CScript& script LIFETIMEBOUND);

CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys);

#endif // BITCOIN_SCRIPT_SOLVER_H