thehub/hub/server/chainparams.h

/*
 * This file is part of the Flowee project
 * Copyright (c) 2009-2010 Satoshi Nakamoto
 * Copyright (c) 2009-2015 The Bitcoin Core developers
 * Copyright (C) 2017 Tom Zander <tom@flowee.org>
 *
 * 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_CHAINPARAMS_H
#define FLOWEE_CHAINPARAMS_H

#include "chainparamsbase.h"
#include "consensus/params.h"
#include "primitives/MutableBlock.h"
#include "protocol.h"

struct CDNSSeedData {
    std::string name, host;
    CDNSSeedData(const std::string &strName, const std::string &strHost) : name(strName), host(strHost) {}
};

struct SeedSpec6 {
    uint8_t addr[16];
    uint16_t port;
};

typedef std::map<int, uint256> MapCheckpoints;

struct CCheckpointData {
    MapCheckpoints mapCheckpoints;
    int64_t nTimeLastCheckpoint;
    int64_t nTransactionsLastCheckpoint;
    double fTransactionsPerDay;
};

/**
 * CChainParams defines various tweakable parameters of a given instance of the
 * Bitcoin system. There are three: the main network on which people trade goods
 * and services, the public test network which gets reset from time to time and
 * a regression test mode which is intended for private networks only. It has
 * minimal difficulty to ensure that blocks can be found instantly.
 */
class CChainParams
{
public:
    enum Base58Type {
        PUBKEY_ADDRESS,
        SCRIPT_ADDRESS,
        SECRET_KEY,
        EXT_PUBLIC_KEY,
        EXT_SECRET_KEY,

        MAX_BASE58_TYPES
    };

    const Consensus::Params& GetConsensus() const { return consensus; }
    /// return the original message-start
    const CMessageHeader::MessageStartChars& MessageStart() const { return pchMessageStart; }
    /// return either of the MessageStart/CashMessageStart based on config options.
    inline const CMessageHeader::MessageStartChars& magic() const { return pchMessageStartCash; }
    int GetDefaultPort() const { return nDefaultPort; }

    Block GenesisBlock() const { return genesis; }
    /** Make miner wait to have peers to avoid wasting work */
    bool MiningRequiresPeers() const { return fMiningRequiresPeers; }
    /** Default value for -checkmempool and -checkblockindex argument */
    bool DefaultConsistencyChecks() const { return fDefaultConsistencyChecks; }
    /** Policy: Filter transactions that do not match well-defined patterns */
    bool RequireStandard() const { return fRequireStandard; }
    int64_t MaxTipAge() const { return nMaxTipAge; }
    uint64_t PruneAfterHeight() const { return nPruneAfterHeight; }
    /** Make miner stop after a block is found. In RPC, don't return until nGenProcLimit blocks are generated */
    bool MineBlocksOnDemand() const { return fMineBlocksOnDemand; }
    /** In the future use NetworkIDString() for RPC fields */
    bool TestnetToBeDeprecatedFieldRPC() const { return fTestnetToBeDeprecatedFieldRPC; }
    /** Return the BIP70 network string (main, test or regtest) */
    std::string NetworkIDString() const { return strNetworkID; }
    const std::vector<CDNSSeedData>& DNSSeeds() const { return vSeeds; }
    const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
    const std::vector<SeedSpec6>& FixedSeeds() const { return vFixedSeeds; }
    const CCheckpointData& Checkpoints() const { return checkpointData; }

protected:
    CChainParams() {}

    Consensus::Params consensus;
    CMessageHeader::MessageStartChars pchMessageStart;
    CMessageHeader::MessageStartChars pchMessageStartCash;
    int nDefaultPort;
    long nMaxTipAge;
    uint64_t nPruneAfterHeight;
    std::vector<CDNSSeedData> vSeeds;
    std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES];
    std::string strNetworkID;
    Block genesis;
    std::vector<SeedSpec6> vFixedSeeds;
    bool fMiningRequiresPeers;
    bool fDefaultConsistencyChecks;
    bool fRequireStandard;
    bool fMineBlocksOnDemand;
    bool fTestnetToBeDeprecatedFieldRPC;
    CCheckpointData checkpointData;
};

/**
 * Return the currently selected parameters. This won't change after app
 * startup, except for unit tests.
 */
const CChainParams &Params();

/**
 * @returns CChainParams for the given chain name.
 */
CChainParams& Params(const std::string& chain);

bool ParamsConfigured();

/**
 * Sets the params returned by Params() to those for the given BIP70 chain name.
 * @throws std::runtime_error when the chain is not supported.
 */
void SelectParams(const std::string& chain);

#endif