chainparams.cpp

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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin 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(MakeTransactionRef(std::move(txNew)));
    genesis.hashPrevBlock.SetNull();
    genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
    return genesis;
}
 
static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
{
    const char* pszTimestamp = "Nintondo";
    const CScript genesisOutputScript = CScript() << ParseHex("040184710fa689ad5023690c80f3a49c8f13f8d45b8c857fbcbc8bc4a8e4d3eb4b10f4d4604fa08dce601aaf0f470216fe1b51850b4acf21b179c45070ac7b03a9") << OP_CHECKSIG;
    return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
}
 
class CMainParams : public CChainParams {
private:
    Consensus::Params digishieldConsensus;
    Consensus::Params auxpowConsensus;
public:
    CMainParams() {
        strNetworkID = "main";
 
        // Blocks 0 - 144999 are conventional difficulty calculation
        consensus.nSubsidyHalvingInterval = 100000;
        consensus.nMajorityEnforceBlockUpgrade = 1500;
        consensus.nMajorityRejectBlockOutdated = 1900;
        consensus.nMajorityWindow = 2000;
        // BIP34 is never enforced in Dogecoin v2 blocks, so we enforce from v3
        consensus.BIP34Height = 1034383;
        consensus.BIP34Hash = uint256S("0x80d1364201e5df97e696c03bdd24dc885e8617b9de51e453c10a4f629b1e797a");
        consensus.BIP65Height = 3464751; // 34cd2cbba4ba366f47e5aa0db5f02c19eba2adf679ceb6653ac003bdc9a0ef1f - first v4 block after the last v3 block
        consensus.BIP66Height = 1034383; // 80d1364201e5df97e696c03bdd24dc885e8617b9de51e453c10a4f629b1e797a - this is the last block that could be v2, 1900 blocks past the last v2 block
        consensus.powLimit = uint256S("0x00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); // ~uint256(0) >> 20;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 60; // 1 minute
        consensus.fDigishieldDifficultyCalculation = false;
        consensus.nCoinbaseMaturity = 30;
        consensus.fPowAllowMinDifficultyBlocks = false;
        consensus.fPowAllowDigishieldMinDifficultyBlocks = false;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 9576; // 95% of 10,080
        consensus.nMinerConfirmationWindow = 10080; // 60 * 24 * 7 = 10,080 blocks, or one week
        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.
        // XXX: BIP heights and hashes all need to be updated to Dogecoin values
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1462060800; // May 1st, 2016
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1493596800; // May 1st, 2017
 
        // Deployment of SegWit (BIP141, BIP143, and BIP147)
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1479168000; // November 15th, 2016.
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 0; // Disabled
 
        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000141a39e783aad4f660f");
 
        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x77e3f4a4bcb4a2c15e8015525e3d15b466f6c022f6ca82698f329edef7d9777e"); // 2,510,150
 
        // AuxPoW parameters
        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = true;
        consensus.fAllowLegacyBlocks = true;
        consensus.nHeightEffective = 0;
 
        // Blocks 145000 - 371336 are Digishield without AuxPoW
        digishieldConsensus = consensus;
        digishieldConsensus.nHeightEffective = 145000;
        digishieldConsensus.fSimplifiedRewards = true;
        digishieldConsensus.fDigishieldDifficultyCalculation = true;
        digishieldConsensus.nPowTargetTimespan = 60; // post-digishield: 1 minute
        digishieldConsensus.nCoinbaseMaturity = 240;
 
        // Blocks 371337+ are AuxPoW
        auxpowConsensus = digishieldConsensus;
        auxpowConsensus.nHeightEffective = 371337;
        auxpowConsensus.fAllowLegacyBlocks = false;
 
        // Assemble the binary search tree of consensus parameters
        pConsensusRoot = &digishieldConsensus;
        digishieldConsensus.pLeft = &consensus;
        digishieldConsensus.pRight = &auxpowConsensus;
 
        pchMessageStart[0] = 0xc0;
        pchMessageStart[1] = 0xc0;
        pchMessageStart[2] = 0xc0;
        pchMessageStart[3] = 0xc0;
        vAlertPubKey = ParseHex("04d4da7a5dae4db797d9b0644d57a5cd50e05a70f36091cd62e2fc41c98ded06340be5a43a35e185690cd9cde5d72da8f6d065b499b06f51dcfba14aad859f443a");
        nDefaultPort = 22556;
        nPruneAfterHeight = 100000;
 
        genesis = CreateGenesisBlock(1386325540, 99943, 0x1e0ffff0, 1, 88 * COIN);
 
        consensus.hashGenesisBlock = genesis.GetHash();
        digishieldConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        auxpowConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        assert(consensus.hashGenesisBlock == uint256S("0x1a91e3dace36e2be3bf030a65679fe821aa1d6ef92e7c9902eb318182c355691"));
        assert(genesis.hashMerkleRoot == uint256S("0x5b2a3f53f605d62c53e62932dac6925e3d74afa5a4b459745c36d42d0ed26a69"));
 
        // Note that of those with the service bits flag, most only support a subset of possible options
        vSeeds.push_back(CDNSSeedData("multidoge.org", "seed.multidoge.org", true));
        vSeeds.push_back(CDNSSeedData("multidoge.org", "seed2.multidoge.org"));
 
        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,30);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,22);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,158);
        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x02)(0xfa)(0xca)(0xfd).convert_to_container<std::vector<unsigned char> >();
        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x02)(0xfa)(0xc3)(0x98).convert_to_container<std::vector<unsigned char> >();
 
        //TODO: fix this for dogecoin -- plddr
        //vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));
        vFixedSeeds.clear();
 
        fMiningRequiresPeers = true;
        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        fMineBlocksOnDemand = false;
 
        checkpointData = (CCheckpointData) {
            boost::assign::map_list_of
            (      0, uint256S("0x1a91e3dace36e2be3bf030a65679fe821aa1d6ef92e7c9902eb318182c355691"))
            ( 104679, uint256S("0x35eb87ae90d44b98898fec8c39577b76cb1eb08e1261cfc10706c8ce9a1d01cf"))
            ( 145000, uint256S("0xcc47cae70d7c5c92828d3214a266331dde59087d4a39071fa76ddfff9b7bde72"))
            ( 371337, uint256S("0x60323982f9c5ff1b5a954eac9dc1269352835f47c2c5222691d80f0d50dcf053"))
            ( 450000, uint256S("0xd279277f8f846a224d776450aa04da3cf978991a182c6f3075db4c48b173bbd7"))
            ( 771275, uint256S("0x1b7d789ed82cbdc640952e7e7a54966c6488a32eaad54fc39dff83f310dbaaed"))
            ( 1000000, uint256S("0x6aae55bea74235f0c80bd066349d4440c31f2d0f27d54265ecd484d8c1d11b47"))
            ( 1250000, uint256S("0x00c7a442055c1a990e11eea5371ca5c1c02a0677b33cc88ec728c45edc4ec060"))
            ( 1500000, uint256S("0xf1d32d6920de7b617d51e74bdf4e58adccaa582ffdc8657464454f16a952fca6"))
            ( 1750000, uint256S("0x5c8e7327984f0d6f59447d89d143e5f6eafc524c82ad95d176c5cec082ae2001"))
            ( 2000000, uint256S("0x9914f0e82e39bbf21950792e8816620d71b9965bdbbc14e72a95e3ab9618fea8"))
            ( 2031142, uint256S("0x893297d89afb7599a3c571ca31a3b80e8353f4cf39872400ad0f57d26c4c5d42"))
            ( 2250000, uint256S("0x0a87a8d4e40dca52763f93812a288741806380cd569537039ee927045c6bc338"))
            ( 2510150, uint256S("0x77e3f4a4bcb4a2c15e8015525e3d15b466f6c022f6ca82698f329edef7d9777e"))
            ( 2750000, uint256S("0xd4f8abb835930d3c4f92ca718aaa09bef545076bd872354e0b2b85deefacf2e3"))
            ( 3000000, uint256S("0x195a83b091fb3ee7ecb56f2e63d01709293f57f971ccf373d93890c8dc1033db"))
            ( 3250000, uint256S("0x7f3e28bf9e309c4b57a4b70aa64d3b2ea5250ae797af84976ddc420d49684034"))
            ( 3500000, uint256S("0xeaa303b93c1c64d2b3a2cdcf6ccf21b10cc36626965cc2619661e8e1879abdfb"))
            ( 3606083, uint256S("0x954c7c66dee51f0a3fb1edb26200b735f5275fe54d9505c76ebd2bcabac36f1e"))
        };
 
        chainTxData = ChainTxData{
            // Data as of block 954c7c66dee51f0a3fb1edb26200b735f5275fe54d9505c76ebd2bcabac36f1e (height 3606083).
            // Tx estimate based on average of year 2021 (~40k transactions per day)
            1613217680, // * UNIX timestamp of last checkpoint block
            71035468,   // * total number of transactions between genesis and last checkpoint
                        //   (the tx=... number in the SetBestChain debug.log lines)
            0.46        // * estimated number of transactions per second after checkpoint
        };
    }
};
static CMainParams mainParams;
 
class CTestNetParams : public CChainParams {
private:
    Consensus::Params digishieldConsensus;
    Consensus::Params auxpowConsensus;
    Consensus::Params minDifficultyConsensus;
public:
    CTestNetParams() {
        strNetworkID = "test";
 
        // Blocks 0 - 144999 are pre-Digishield
        consensus.nHeightEffective = 0;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.fDigishieldDifficultyCalculation = false;
        consensus.nCoinbaseMaturity = 30;
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowAllowDigishieldMinDifficultyBlocks = false;
        consensus.nSubsidyHalvingInterval = 100000;
        consensus.nMajorityEnforceBlockUpgrade = 501;
        consensus.nMajorityRejectBlockOutdated = 750;
        consensus.nMajorityWindow = 1000;
        // BIP34 is never enforced in Dogecoin v2 blocks, so we enforce from v3
        consensus.BIP34Height = 708658;
        consensus.BIP34Hash = uint256S("0x21b8b97dcdb94caa67c7f8f6dbf22e61e0cfe0e46e1fff3528b22864659e9b38");
        consensus.BIP65Height = 1854705; // 955bd496d23790aba1ecfacb722b089a6ae7ddabaedf7d8fb0878f48308a71f9
        consensus.BIP66Height = 708658; // 21b8b97dcdb94caa67c7f8f6dbf22e61e0cfe0e46e1fff3528b22864659e9b38 - this is the last block that could be v2, 1900 blocks past the last v2 block
        consensus.powLimit = uint256S("0x00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); // ~uint256(0) >> 20;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 60; // 1 minute
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 2880; // 2 days (note this is significantly lower than Bitcoin standard)
        consensus.nMinerConfirmationWindow = 10080; // 60 * 24 * 7 = 10,080 blocks, or one week
        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.
        // XXX: BIP heights and hashes all need to be updated to Dogecoin values
        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
 
        // Deployment of SegWit (BIP141, BIP143, and BIP147)
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1462060800; // May 1st 2016
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 0; // Disabled
 
        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000000000001030d1382ade");
 
        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x6943eaeaba98dc7d09f7e73398daccb4abcabb18b66c8c875e52b07638d93951"); // 900,000
 
        // AuxPoW parameters
        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = false;
        consensus.nHeightEffective = 0;
        consensus.fAllowLegacyBlocks = true;
 
        // Blocks 145000 - 157499 are Digishield without minimum difficulty on all blocks
        digishieldConsensus = consensus;
        digishieldConsensus.nHeightEffective = 145000;
        digishieldConsensus.nPowTargetTimespan = 60; // post-digishield: 1 minute
        digishieldConsensus.fDigishieldDifficultyCalculation = true;
        digishieldConsensus.fSimplifiedRewards = true;
        digishieldConsensus.fPowAllowMinDifficultyBlocks = false;
        digishieldConsensus.nCoinbaseMaturity = 240;
 
        // Blocks 157500 - 158099 are Digishield with minimum difficulty on all blocks
        minDifficultyConsensus = digishieldConsensus;
        minDifficultyConsensus.nHeightEffective = 157500;
        minDifficultyConsensus.fPowAllowDigishieldMinDifficultyBlocks = true;
        minDifficultyConsensus.fPowAllowMinDifficultyBlocks = true;
 
        // Enable AuxPoW at 158100
        auxpowConsensus = minDifficultyConsensus;
        auxpowConsensus.nHeightEffective = 158100;
        auxpowConsensus.fPowAllowDigishieldMinDifficultyBlocks = true;
        auxpowConsensus.fAllowLegacyBlocks = false;
 
        // Assemble the binary search tree of parameters
        pConsensusRoot = &digishieldConsensus;
        digishieldConsensus.pLeft = &consensus;
        digishieldConsensus.pRight = &minDifficultyConsensus;
        minDifficultyConsensus.pRight = &auxpowConsensus;
 
        pchMessageStart[0] = 0xfc;
        pchMessageStart[1] = 0xc1;
        pchMessageStart[2] = 0xb7;
        pchMessageStart[3] = 0xdc;
        vAlertPubKey = ParseHex("042756726da3c7ef515d89212ee1705023d14be389e25fe15611585661b9a20021908b2b80a3c7200a0139dd2b26946606aab0eef9aa7689a6dc2c7eee237fa834");
        nDefaultPort = 44556;
        nPruneAfterHeight = 1000;
 
        genesis = CreateGenesisBlock(1391503289, 997879, 0x1e0ffff0, 1, 88 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        digishieldConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        minDifficultyConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        auxpowConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        assert(consensus.hashGenesisBlock == uint256S("0xbb0a78264637406b6360aad926284d544d7049f45189db5664f3c4d07350559e"));
        assert(genesis.hashMerkleRoot == uint256S("0x5b2a3f53f605d62c53e62932dac6925e3d74afa5a4b459745c36d42d0ed26a69"));
 
        vFixedSeeds.clear();
        vSeeds.clear();
        // nodes with support for servicebits filtering should be at the top
        vSeeds.push_back(CDNSSeedData("jrn.me.uk", "testseed.jrn.me.uk"));
 
        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,113); // 0x71
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196); // 0xc4
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,241); // 0xf1
        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xcf).convert_to_container<std::vector<unsigned char> >();
        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();
 
        //TODO: fix this for dogecoin -- plddr
        //vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));
 
        fMiningRequiresPeers = true;
        fDefaultConsistencyChecks = false;
        fRequireStandard = false;
        fMineBlocksOnDemand = false;
 
        checkpointData = (CCheckpointData) {
            boost::assign::map_list_of
            ( 0, uint256S("0xbb0a78264637406b6360aad926284d544d7049f45189db5664f3c4d07350559e"))
            ( 483173, uint256S("0xa804201ca0aceb7e937ef7a3c613a9b7589245b10cc095148c4ce4965b0b73b5"))
            ( 591117, uint256S("0x5f6b93b2c28cedf32467d900369b8be6700f0649388a7dbfd3ebd4a01b1ffad8"))
            ( 658924, uint256S("0xed6c8324d9a77195ee080f225a0fca6346495e08ded99bcda47a8eea5a8a620b"))
            ( 703635, uint256S("0x839fa54617adcd582d53030a37455c14a87a806f6615aa8213f13e196230ff7f"))
            ( 1000000, uint256S("0x1fe4d44ea4d1edb031f52f0d7c635db8190dc871a190654c41d2450086b8ef0e"))
            ( 1202214, uint256S("0xa2179767a87ee4e95944703976fee63578ec04fa3ac2fc1c9c2c83587d096977"))
            ( 1250000, uint256S("0xb46affb421872ca8efa30366b09694e2f9bf077f7258213be14adb05a9f41883"))
            ( 1500000, uint256S("0x0caa041b47b4d18a4f44bdc05cef1a96d5196ce7b2e32ad3e4eb9ba505144917"))
            ( 1750000, uint256S("0x8042462366d854ad39b8b95ed2ca12e89a526ceee5a90042d55ebb24d5aab7e9"))
            ( 2000000, uint256S("0xd6acde73e1b42fc17f29dcc76f63946d378ae1bd4eafab44d801a25be784103c"))
            ( 2250000, uint256S("0xc4342ae6d9a522a02e5607411df1b00e9329563ef844a758d762d601d42c86dc"))
            ( 2500000, uint256S("0x3a66ec4933fbb348c9b1889aaf2f732fe429fd9a8f74fee6895eae061ac897e2"))
            ( 2750000, uint256S("0x473ea9f625d59f534ffcc9738ffc58f7b7b1e0e993078614f5484a9505885563"))
            ( 3062910, uint256S("0x113c41c00934f940a41f99d18b2ad9aefd183a4b7fe80527e1e6c12779bd0246"))
 
        };
 
        chainTxData = ChainTxData{
            // Data as of block a113c41c00934f940a41f99d18b2ad9aefd183a4b7fe80527e1e6c12779bd024 (height 3062910)
            1613217942, // * UNIX timestamp of last checkpoint block
            4186373,    // * total number of transactions between genesis and last checkpoint
            0.05        // * estimated number of transactions per second after that timestamp
        };
 
    }
};
static CTestNetParams testNetParams;
 
class CRegTestParams : public CChainParams {
private:
    Consensus::Params digishieldConsensus;
    Consensus::Params auxpowConsensus;
public:
    CRegTestParams() {
        strNetworkID = "regtest";
        consensus.nSubsidyHalvingInterval = 150;
        consensus.nMajorityEnforceBlockUpgrade = 750;
        consensus.nMajorityRejectBlockOutdated = 950;
        consensus.nMajorityWindow = 1000;
        consensus.BIP34Height = 100000000; // BIP34 has not activated on regtest (far in the future so block v1 are not rejected in tests)
        consensus.BIP34Hash = uint256();
        consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in rpc activation tests)
        consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in rpc activation tests)
        consensus.powLimit = uint256S("0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); // ~uint256(0) >> 1;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 1; // regtest: 1 second blocks
        consensus.fDigishieldDifficultyCalculation = false;
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowNoRetargeting = true;
        consensus.nRuleChangeActivationThreshold = 540; // 75% for testchains
        consensus.nMinerConfirmationWindow = 720; // Faster than normal for regtest (2,520 instead of 10,080)
        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;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 999999999999ULL;
 
        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x00");
 
        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x00");
 
        // AuxPow parameters
        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = true;
        consensus.fAllowLegacyBlocks = true;
 
        // Dogecoin parameters
        consensus.fSimplifiedRewards = true;
        consensus.nCoinbaseMaturity = 60; // For easier testability in RPC tests
 
        digishieldConsensus = consensus;
        digishieldConsensus.nHeightEffective = 10;
        digishieldConsensus.nPowTargetTimespan = 1; // regtest: also retarget every second in digishield mode, for conformity
        digishieldConsensus.fDigishieldDifficultyCalculation = true;
 
        auxpowConsensus = digishieldConsensus;
        auxpowConsensus.fAllowLegacyBlocks = false;
        auxpowConsensus.nHeightEffective = 20;
 
        // Assemble the binary search tree of parameters
        digishieldConsensus.pLeft = &consensus;
        digishieldConsensus.pRight = &auxpowConsensus;
        pConsensusRoot = &digishieldConsensus;
 
        pchMessageStart[0] = 0xfa;
        pchMessageStart[1] = 0xbf;
        pchMessageStart[2] = 0xb5;
        pchMessageStart[3] = 0xda;
        nDefaultPort = 18444;
        nPruneAfterHeight = 1000;
 
        genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 88 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        digishieldConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        auxpowConsensus.hashGenesisBlock = consensus.hashGenesisBlock;
        assert(consensus.hashGenesisBlock == uint256S("0x3d2160a3b5dc4a9d62e7e66a295f70313ac808440ef7400d6c0772171ce973a5"));
        assert(genesis.hashMerkleRoot == uint256S("0x5b2a3f53f605d62c53e62932dac6925e3d74afa5a4b459745c36d42d0ed26a69"));
 
        vFixedSeeds.clear(); 
        vSeeds.clear();      
 
        fMiningRequiresPeers = false;
        fDefaultConsistencyChecks = true;
        fRequireStandard = false;
        fMineBlocksOnDemand = true;
 
        checkpointData = (CCheckpointData){
            boost::assign::map_list_of
            ( 0, uint256S("0x3d2160a3b5dc4a9d62e7e66a295f70313ac808440ef7400d6c0772171ce973a5"))
        };
 
        chainTxData = ChainTxData{
            0,
            0,
            0
        };
 
        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);  // 0x6f
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);  // 0xc4
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);  // 0xef
        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xCF).convert_to_container<std::vector<unsigned char> >();
        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();
    }
 
    void UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
    {
        consensus.vDeployments[d].nStartTime = nStartTime;
        consensus.vDeployments[d].nTimeout = nTimeout;
    }
};
static CRegTestParams regTestParams;
 
static CChainParams *pCurrentParams = 0;
 
const CChainParams &Params() {
    assert(pCurrentParams);
    return *pCurrentParams;
}
 
const Consensus::Params *Consensus::Params::GetConsensus(uint32_t nTargetHeight) const {
    if (nTargetHeight < this -> nHeightEffective && this -> pLeft != NULL) {
        return this -> pLeft -> GetConsensus(nTargetHeight);
    } else if (nTargetHeight > this -> nHeightEffective && this -> pRight != NULL) {
        const Consensus::Params *pCandidate = this -> pRight -> GetConsensus(nTargetHeight);
        if (pCandidate->nHeightEffective <= nTargetHeight) {
            return pCandidate;
        }
    }
 
    // No better match below the target height
    return this;
}
 
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);
}
 
void UpdateRegtestBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
{
    regTestParams.UpdateBIP9Parameters(d, nStartTime, nTimeout);
}