dash/src/chainparams.cpp

// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core developers
// Copyright (c) 2014-2017 The Dash Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "chainparams.h"
#include "consensus/merkle.h"

#include "tinyformat.h"
#include "util.h"
#include "utilstrencodings.h"

#include <assert.h>

#include <boost/assign/list_of.hpp>

#include "chainparamsseeds.h"

static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
{
    CMutableTransaction txNew;
    txNew.nVersion = 1;
    txNew.vin.resize(1);
    txNew.vout.resize(1);
    txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
    txNew.vout[0].nValue = genesisReward;
    txNew.vout[0].scriptPubKey = genesisOutputScript;

    CBlock genesis;
    genesis.nTime    = nTime;
    genesis.nBits    = nBits;
    genesis.nNonce   = nNonce;
    genesis.nVersion = nVersion;
    genesis.vtx.push_back(txNew);
    genesis.hashPrevBlock.SetNull();
    genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
    return genesis;
}

/**
 * Build the genesis block. Note that the output of its generation
 * transaction cannot be spent since it did not originally exist in the
 * database.
 *
 * CBlock(hash=00000ffd590b14, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=e0028e, nTime=1390095618, nBits=1e0ffff0, nNonce=28917698, vtx=1)
 *   CTransaction(hash=e0028e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
 *     CTxIn(COutPoint(000000, -1), coinbase 04ffff001d01044c5957697265642030392f4a616e2f3230313420546865204772616e64204578706572696d656e7420476f6573204c6976653a204f76657273746f636b2e636f6d204973204e6f7720416363657074696e6720426974636f696e73)
 *     CTxOut(nValue=50.00000000, scriptPubKey=0xA9037BAC7050C479B121CF)
 *   vMerkleTree: e0028e
 */
static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
{
    const char* pszTimestamp = "Wired 09/Jan/2014 The Grand Experiment Goes Live: Overstock.com Is Now Accepting Bitcoins";
    const CScript genesisOutputScript = CScript() << ParseHex("040184710fa689ad5023690c80f3a49c8f13f8d45b8c857fbcbc8bc4a8e4d3eb4b10f4d4604fa08dce601aaf0f470216fe1b51850b4acf21b179c45070ac7b03a9") << OP_CHECKSIG;
    return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
}

/**
 * Main network
 */
/**
 * What makes a good checkpoint block?
 * + Is surrounded by blocks with reasonable timestamps
 *   (no blocks before with a timestamp after, none after with
 *    timestamp before)
 * + Contains no strange transactions
 */


class CMainParams : public CChainParams {
public:
    CMainParams() {
        strNetworkID = "main";
        consensus.nSubsidyHalvingInterval = 210240; // Note: actual number of blocks per calendar year with DGW v3 is ~200700 (for example 449750 - 249050)
        consensus.nMasternodePaymentsStartBlock = 100000; // not true, but it's ok as long as it's less then nMasternodePaymentsIncreaseBlock
        consensus.nMasternodePaymentsIncreaseBlock = 158000; // actual historical value
        consensus.nMasternodePaymentsIncreasePeriod = 576*30; // 17280 - actual historical value
        consensus.nInstantSendKeepLock = 24;
        consensus.nBudgetPaymentsStartBlock = 328008; // actual historical value
        consensus.nBudgetPaymentsCycleBlocks = 16616; // ~(60*24*30)/2.6, actual number of blocks per month is 200700 / 12 = 16725
        consensus.nBudgetPaymentsWindowBlocks = 100;
        consensus.nBudgetProposalEstablishingTime = 60*60*24;
        consensus.nSuperblockStartBlock = 614820; // The block at which 12.1 goes live (end of final 12.0 budget cycle)
        consensus.nSuperblockCycle = 16616; // ~(60*24*30)/2.6, actual number of blocks per month is 200700 / 12 = 16725
        consensus.nGovernanceMinQuorum = 10;
        consensus.nGovernanceFilterElements = 20000;
        consensus.nMasternodeMinimumConfirmations = 15;
        consensus.nMajorityEnforceBlockUpgrade = 750;
        consensus.nMajorityRejectBlockOutdated = 950;
        consensus.nMajorityWindow = 1000;
        consensus.BIP34Height = 227931;
        consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
        consensus.powLimit = uint256S("00000fffff000000000000000000000000000000000000000000000000000000");
        consensus.nPowTargetTimespan = 24 * 60 * 60; // Dash: 1 day
        consensus.nPowTargetSpacing = 2.5 * 60; // Dash: 2.5 minutes
        consensus.fPowAllowMinDifficultyBlocks = false;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 1916; // 95% of 2016
        consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008

        // Deployment of BIP68, BIP112, and BIP113.
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1486252800; // Feb 5th, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1517788800; // Feb 5th, 2018

        /**
         * The message start string is designed to be unlikely to occur in normal data.
         * The characters are rarely used upper ASCII, not valid as UTF-8, and produce
         * a large 32-bit integer with any alignment.
         */
        pchMessageStart[0] = 0xbf;
        pchMessageStart[1] = 0x0c;
        pchMessageStart[2] = 0x6b;
        pchMessageStart[3] = 0xbd;
        vAlertPubKey = ParseHex("048240a8748a80a286b270ba126705ced4f2ce5a7847b3610ea3c06513150dade2a8512ed5ea86320824683fc0818f0ac019214973e677acd1244f6d0571fc5103");
        nDefaultPort = 9999;
        nMaxTipAge = 6 * 60 * 60; // ~144 blocks behind -> 2 x fork detection time, was 24 * 60 * 60 in bitcoin
        nPruneAfterHeight = 100000;

        genesis = CreateGenesisBlock(1390095618, 28917698, 0x1e0ffff0, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x00000ffd590b1485b3caadc19b22e6379c733355108f107a430458cdf3407ab6"));
        assert(genesis.hashMerkleRoot == uint256S("0xe0028eb9648db56b1ac77cf090b99048a8007e2bb64b68f092c03c7f56a662c7"));


        vSeeds.push_back(CDNSSeedData("dash.org", "dnsseed.dash.org"));
        vSeeds.push_back(CDNSSeedData("dashdot.io", "dnsseed.dashdot.io"));
        vSeeds.push_back(CDNSSeedData("masternode.io", "dnsseed.masternode.io"));
        vSeeds.push_back(CDNSSeedData("dashpay.io", "dnsseed.dashpay.io"));

        // Dash addresses start with 'X'
        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,76);
        // Dash script addresses start with '7'
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,16);
        // Dash private keys start with '7' or 'X'
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,204);
        // Dash BIP32 pubkeys start with 'xpub' (Bitcoin defaults)
        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x88)(0xB2)(0x1E).convert_to_container<std::vector<unsigned char> >();
        // Dash BIP32 prvkeys start with 'xprv' (Bitcoin defaults)
        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x88)(0xAD)(0xE4).convert_to_container<std::vector<unsigned char> >();

        // Dash BIP44 coin type is '5'
        nExtCoinType = 5;

        vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));

        fMiningRequiresPeers = true;
        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        fMineBlocksOnDemand = false;
        fTestnetToBeDeprecatedFieldRPC = false;

        nPoolMaxTransactions = 3;
        nFulfilledRequestExpireTime = 60*60; // fulfilled requests expire in 1 hour
        strSporkPubKey = "04549ac134f694c0243f503e8c8a9a986f5de6610049c40b07816809b0d1d06a21b07be27b9bb555931773f62ba6cf35a25fd52f694d4e1106ccd237a7bb899fdd";
        strMasternodePaymentsPubKey = "04549ac134f694c0243f503e8c8a9a986f5de6610049c40b07816809b0d1d06a21b07be27b9bb555931773f62ba6cf35a25fd52f694d4e1106ccd237a7bb899fdd";

        checkpointData = (CCheckpointData) {
            boost::assign::map_list_of
            (  1500, uint256S("0x000000aaf0300f59f49bc3e970bad15c11f961fe2347accffff19d96ec9778e3"))
            (  4991, uint256S("0x000000003b01809551952460744d5dbb8fcbd6cbae3c220267bf7fa43f837367"))
            (  9918, uint256S("0x00000000213e229f332c0ffbe34defdaa9e74de87f2d8d1f01af8d121c3c170b"))
            ( 16912, uint256S("0x00000000075c0d10371d55a60634da70f197548dbbfa4123e12abfcbc5738af9"))
            ( 23912, uint256S("0x0000000000335eac6703f3b1732ec8b2f89c3ba3a7889e5767b090556bb9a276"))
            ( 35457, uint256S("0x0000000000b0ae211be59b048df14820475ad0dd53b9ff83b010f71a77342d9f"))
            ( 45479, uint256S("0x000000000063d411655d590590e16960f15ceea4257122ac430c6fbe39fbf02d"))
            ( 55895, uint256S("0x0000000000ae4c53a43639a4ca027282f69da9c67ba951768a20415b6439a2d7"))
            ( 68899, uint256S("0x0000000000194ab4d3d9eeb1f2f792f21bb39ff767cb547fe977640f969d77b7"))
            ( 74619, uint256S("0x000000000011d28f38f05d01650a502cc3f4d0e793fbc26e2a2ca71f07dc3842"))
            ( 75095, uint256S("0x0000000000193d12f6ad352a9996ee58ef8bdc4946818a5fec5ce99c11b87f0d"))
            ( 88805, uint256S("0x00000000001392f1652e9bf45cd8bc79dc60fe935277cd11538565b4a94fa85f"))
            ( 107996, uint256S("0x00000000000a23840ac16115407488267aa3da2b9bc843e301185b7d17e4dc40"))
            ( 137993, uint256S("0x00000000000cf69ce152b1bffdeddc59188d7a80879210d6e5c9503011929c3c"))
            ( 167996, uint256S("0x000000000009486020a80f7f2cc065342b0c2fb59af5e090cd813dba68ab0fed"))
            ( 207992, uint256S("0x00000000000d85c22be098f74576ef00b7aa00c05777e966aff68a270f1e01a5"))
            ( 312645, uint256S("0x0000000000059dcb71ad35a9e40526c44e7aae6c99169a9e7017b7d84b1c2daf"))
            ( 407452, uint256S("0x000000000003c6a87e73623b9d70af7cd908ae22fee466063e4ffc20be1d2dbc"))
            ( 523412, uint256S("0x000000000000e54f036576a10597e0e42cc22a5159ce572f999c33975e121d4d"))
            ( 523930, uint256S("0x0000000000000bccdb11c2b1cfb0ecab452abf267d89b7f46eaf2d54ce6e652c")),
            1471809614, // * UNIX timestamp of last checkpoint block
            1998064,    // * total number of transactions between genesis and last checkpoint
                        //   (the tx=... number in the SetBestChain debug.log lines)
            2800        // * estimated number of transactions per day after checkpoint
        };
    }
};
static CMainParams mainParams;

/**
 * Testnet (v3)
 */
class CTestNetParams : public CChainParams {
public:
    CTestNetParams() {
        strNetworkID = "test";
        consensus.nSubsidyHalvingInterval = 210240;
        consensus.nMasternodePaymentsStartBlock = 10000; // not true, but it's ok as long as it's less then nMasternodePaymentsIncreaseBlock
        consensus.nMasternodePaymentsIncreaseBlock = 46000;
        consensus.nMasternodePaymentsIncreasePeriod = 576;
        consensus.nInstantSendKeepLock = 6;
        consensus.nBudgetPaymentsStartBlock = 60000;
        consensus.nBudgetPaymentsCycleBlocks = 50;
        consensus.nBudgetPaymentsWindowBlocks = 10;
        consensus.nBudgetProposalEstablishingTime = 60*20;
        consensus.nSuperblockStartBlock = 61000; // NOTE: Should satisfy nSuperblockStartBlock > nBudgetPeymentsStartBlock
        consensus.nSuperblockCycle = 24; // Superblocks can be issued hourly on testnet
        consensus.nGovernanceMinQuorum = 1;
        consensus.nGovernanceFilterElements = 500;
        consensus.nMasternodeMinimumConfirmations = 1;
        consensus.nMajorityEnforceBlockUpgrade = 51;
        consensus.nMajorityRejectBlockOutdated = 75;
        consensus.nMajorityWindow = 100;
        consensus.BIP34Height = 21111;
        consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
        consensus.powLimit = uint256S("00000fffff000000000000000000000000000000000000000000000000000000");
        consensus.nPowTargetTimespan = 24 * 60 * 60; // Dash: 1 day
        consensus.nPowTargetSpacing = 2.5 * 60; // Dash: 2.5 minutes
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 1512; // 75% for testchains
        consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008

        // Deployment of BIP68, BIP112, and BIP113.
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1456790400; // March 1st, 2016
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1493596800; // May 1st, 2017

        pchMessageStart[0] = 0xce;
        pchMessageStart[1] = 0xe2;
        pchMessageStart[2] = 0xca;
        pchMessageStart[3] = 0xff;
        vAlertPubKey = ParseHex("04517d8a699cb43d3938d7b24faaff7cda448ca4ea267723ba614784de661949bf632d6304316b244646dea079735b9a6fc4af804efb4752075b9fe2245e14e412");
        nDefaultPort = 19999;
        nMaxTipAge = 0x7fffffff; // allow mining on top of old blocks for testnet
        nPruneAfterHeight = 1000;

        genesis = CreateGenesisBlock(1390666206UL, 3861367235UL, 0x1e0ffff0, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x00000bafbc94add76cb75e2ec92894837288a481e5c005f6563d91623bf8bc2c"));
        assert(genesis.hashMerkleRoot == uint256S("0xe0028eb9648db56b1ac77cf090b99048a8007e2bb64b68f092c03c7f56a662c7"));

        vFixedSeeds.clear();
        vSeeds.clear();
        vSeeds.push_back(CDNSSeedData("dashdot.io",  "testnet-seed.dashdot.io"));
        vSeeds.push_back(CDNSSeedData("masternode.io", "test.dnsseed.masternode.io"));

        // Testnet Dash addresses start with 'y'
        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,140);
        // Testnet Dash script addresses start with '8' or '9'
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,19);
        // Testnet private keys start with '9' or 'c' (Bitcoin defaults)
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
        // Testnet Dash BIP32 pubkeys start with 'tpub' (Bitcoin defaults)
        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xCF).convert_to_container<std::vector<unsigned char> >();
        // Testnet Dash BIP32 prvkeys start with 'tprv' (Bitcoin defaults)
        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();

        // Testnet Dash BIP44 coin type is '1' (All coin's testnet default)
        nExtCoinType = 1;

        vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));

        fMiningRequiresPeers = true;
        fDefaultConsistencyChecks = false;
        fRequireStandard = false;
        fMineBlocksOnDemand = false;
        fTestnetToBeDeprecatedFieldRPC = true;

        nPoolMaxTransactions = 3;
        nFulfilledRequestExpireTime = 5*60; // fulfilled requests expire in 5 minutes
        strSporkPubKey = "046f78dcf911fbd61910136f7f0f8d90578f68d0b3ac973b5040fb7afb501b5939f39b108b0569dca71488f5bbf498d92e4d1194f6f941307ffd95f75e76869f0e";
        strMasternodePaymentsPubKey = "046f78dcf911fbd61910136f7f0f8d90578f68d0b3ac973b5040fb7afb501b5939f39b108b0569dca71488f5bbf498d92e4d1194f6f941307ffd95f75e76869f0e";

        checkpointData = (CCheckpointData) {
            boost::assign::map_list_of
            (    261, uint256S("0x00000c26026d0815a7e2ce4fa270775f61403c040647ff2c3091f99e894a4618"))
            (   1999, uint256S("0x00000052e538d27fa53693efe6fb6892a0c1d26c0235f599171c48a3cce553b1"))
            (   2999, uint256S("0x0000024bc3f4f4cb30d29827c13d921ad77d2c6072e586c7f60d83c2722cdcc5"))
            (  12907, uint256S("0x00000067de20fd6d276ee0839a3187b203accaa5aad04ca5c17c2997e2730e4c"))
            (  15590, uint256S("0x00000009df8f2ee9c230aef9dad257d82bde20ca83378a208ce5d95d29a78852"))
            (  65900, uint256S("0x00000063e4e94d75d0dc075e93898444c8ef50655990dfff7c32d92a7efff671"))
            ( 127618, uint256S("0x0000002104a2c1fc923b0e3b74b1860236fbc2b4479a833c28abaf456ea4e466")),

            1483076495, // * UNIX timestamp of last checkpoint block
            168590,     // * total number of transactions between genesis and last checkpoint
                        //   (the tx=... number in the SetBestChain debug.log lines)
            500         // * estimated number of transactions per day after checkpoint
        };

    }
};
static CTestNetParams testNetParams;

/**
 * Regression test
 */
class CRegTestParams : public CChainParams {
public:
    CRegTestParams() {
        strNetworkID = "regtest";
        consensus.nSubsidyHalvingInterval = 150;
        consensus.nMasternodePaymentsStartBlock = 240;
        consensus.nMasternodePaymentsIncreaseBlock = 350;
        consensus.nMasternodePaymentsIncreasePeriod = 10;
        consensus.nInstantSendKeepLock = 6;
        consensus.nBudgetPaymentsStartBlock = 1000;
        consensus.nBudgetPaymentsCycleBlocks = 50;
        consensus.nBudgetPaymentsWindowBlocks = 10;
        consensus.nBudgetProposalEstablishingTime = 60*20;
        consensus.nSuperblockStartBlock = 1500;
        consensus.nSuperblockCycle = 10;
        consensus.nGovernanceMinQuorum = 1;
        consensus.nGovernanceFilterElements = 100;
        consensus.nMasternodeMinimumConfirmations = 1;
        consensus.nMajorityEnforceBlockUpgrade = 750;
        consensus.nMajorityRejectBlockOutdated = 950;
        consensus.nMajorityWindow = 1000;
        consensus.BIP34Height = -1; // BIP34 has not necessarily activated on regtest
        consensus.BIP34Hash = uint256();
        consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
        consensus.nPowTargetTimespan = 24 * 60 * 60; // Dash: 1 day
        consensus.nPowTargetSpacing = 2.5 * 60; // Dash: 2.5 minutes
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowNoRetargeting = true;
        consensus.nRuleChangeActivationThreshold = 108; // 75% for testchains
        consensus.nMinerConfirmationWindow = 144; // Faster than normal for regtest (144 instead of 2016)
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 999999999999ULL;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 999999999999ULL;

        pchMessageStart[0] = 0xfc;
        pchMessageStart[1] = 0xc1;
        pchMessageStart[2] = 0xb7;
        pchMessageStart[3] = 0xdc;
        nMaxTipAge = 6 * 60 * 60; // ~144 blocks behind -> 2 x fork detection time, was 24 * 60 * 60 in bitcoin
        nDefaultPort = 19994;
        nPruneAfterHeight = 1000;

        genesis = CreateGenesisBlock(1417713337, 1096447, 0x207fffff, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x000008ca1832a4baf228eb1553c03d3a2c8e02399550dd6ea8d65cec3ef23d2e"));
        assert(genesis.hashMerkleRoot == uint256S("0xe0028eb9648db56b1ac77cf090b99048a8007e2bb64b68f092c03c7f56a662c7"));

        vFixedSeeds.clear(); //! Regtest mode doesn't have any fixed seeds.
        vSeeds.clear();  //! Regtest mode doesn't have any DNS seeds.

        fMiningRequiresPeers = false;
        fDefaultConsistencyChecks = true;
        fRequireStandard = false;
        fMineBlocksOnDemand = true;
        fTestnetToBeDeprecatedFieldRPC = false;

        nFulfilledRequestExpireTime = 5*60; // fulfilled requests expire in 5 minutes

        checkpointData = (CCheckpointData){
            boost::assign::map_list_of
            ( 0, uint256S("0x000008ca1832a4baf228eb1553c03d3a2c8e02399550dd6ea8d65cec3ef23d2e")),
            0,
            0,
            0
        };
        // Regtest Dash addresses start with 'y'
        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,140);
        // Regtest Dash script addresses start with '8' or '9'
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,19);
        // Regtest private keys start with '9' or 'c' (Bitcoin defaults)
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
        // Regtest Dash BIP32 pubkeys start with 'tpub' (Bitcoin defaults)
        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xCF).convert_to_container<std::vector<unsigned char> >();
        // Regtest Dash BIP32 prvkeys start with 'tprv' (Bitcoin defaults)
        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();

        // Regtest Dash BIP44 coin type is '1' (All coin's testnet default)
        nExtCoinType = 1;
   }
};
static CRegTestParams regTestParams;

static CChainParams *pCurrentParams = 0;

const CChainParams &Params() {
    assert(pCurrentParams);
    return *pCurrentParams;
}

CChainParams& Params(const std::string& chain)
{
    if (chain == CBaseChainParams::MAIN)
            return mainParams;
    else if (chain == CBaseChainParams::TESTNET)
            return testNetParams;
    else if (chain == CBaseChainParams::REGTEST)
            return regTestParams;
    else
        throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
}

void SelectParams(const std::string& network)
{
    SelectBaseParams(network);
    pCurrentParams = &Params(network);
}