standard.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2017 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 FABCOIN_SCRIPT_STANDARD_H
#define FABCOIN_SCRIPT_STANDARD_H

#include "script/interpreter.h"
#include "uint256.h"

#include <boost/variant.hpp>

#include <stdint.h>

static const bool DEFAULT_ACCEPT_DATACARRIER = true;

//contract executions with less gas than this are not standard
//Make sure is always equal or greater than MINIMUM_GAS_LIMIT (which we can't reference here due to insane header dependency chains)
static const uint64_t STANDARD_MINIMUM_GAS_LIMIT = 10000;
//contract executions with a price cheaper than this (in lius) are not standard
//TODO this needs to be controlled by DGP and needs to be propogated from consensus parameters
static const uint64_t STANDARD_MINIMUM_GAS_PRICE = 1;
class CKeyID;
class CScript;

class CScriptID : public uint160
{
public:
    CScriptID() : uint160() {}
    CScriptID(const CScript& in);
    CScriptID(const uint160& in) : uint160(in) {}
};

static const unsigned int MAX_OP_RETURN_RELAY = 83; 
extern bool fAcceptDatacarrier;
extern unsigned nMaxDatacarrierBytes;

static const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH;

enum txnouttype
{
    TX_NONSTANDARD,
    // 'standard' transaction types:
    TX_PUBKEY,
    TX_PUBKEYHASH,
    TX_SCRIPTHASH,
    TX_MULTISIG,
    TX_NULL_DATA,
    TX_WITNESS_V0_SCRIPTHASH,
    TX_WITNESS_V0_KEYHASH,
    TX_CREATE,
    TX_CALL,
};

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; }
};

typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination;

const char* GetTxnOutputType(txnouttype t);

bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet, bool contractConsensus=false);
bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet, txnouttype* typeRet = nullptr);
bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);

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

#endif // FABCOIN_SCRIPT_STANDARD_H