thehub/hub/server/script/standard.h

/*
 * This file is part of the Flowee project
 * Copyright (C) 2009-2010 Satoshi Nakamoto
 * Copyright (C) 2009-2015 The Bitcoin Core developers
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FLOWEE_SCRIPT_STANDARD_H
#define FLOWEE_SCRIPT_STANDARD_H

#include <primitives/script.h>
#include <script/interpreter.h>
#include <boost/variant.hpp>

class KeyId;
class CScript;
class CScriptID;

extern bool fAcceptDatacarrier;
extern int nMaxDatacarrierBytes;

/**
 * Mandatory script verification flags that all new blocks must comply with for
 * them to be valid. (but old blocks may not comply with) Currently just P2SH,
 * but in the future other flags may be added, such as a soft-fork to enforce
 * strict DER encoding.
 * 
 * Failing one of these tests may trigger a DoS ban - see CheckInputs() for
 * details.
 */
static const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH;

class CNoDestination {
public:
    friend bool operator==(const CNoDestination &a, const CNoDestination &b) { return true; }
    friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; }
};

/** 
 * A txout script template with a specific destination. It is either:
 *  * CNoDestination: no destination set
 *  * KeyId: TX_PUBKEYHASH destination
 *  * CScriptID: TX_SCRIPTHASH destination
 *  A CTxDestination is the internal data type encoded in a CBitcoinAddress
 */
typedef boost::variant<CNoDestination, KeyId, CScriptID> CTxDestination;

bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet);
bool ExtractDestinations(const CScript& scriptPubKey, Script::TxnOutType& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);

CScript GetScriptForDestination(const CTxDestination& dest);
CScript GetScriptForRawPubKey(const PublicKey& pubkey);
CScript GetScriptForMultisig(int nRequired, const std::vector<PublicKey>& keys);

#endif