dogecoin/src/chainparams.cpp

// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2020 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 <chainparamsseeds.h>
#include <consensus/merkle.h>
#include <hash.h> // for signet block challenge hash
#include <tinyformat.h>
#include <util/system.h>
#include <util/strencodings.h>
#include <versionbitsinfo.h>

#include <assert.h>

#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/split.hpp>

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;
}

/**
 * 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=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1386325540, nBits=1e0ffff0, nNonce=99943, vtx=1)
 *   CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
 *     CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
 *     CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
 *   vMerkleTree: 4a5e1e
 */
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);
}

/**
 * Main network
 */
class CMainParams : public CChainParams {
public:
    CMainParams() {
        strNetworkID = CBaseChainParams::MAIN;
        consensus.signet_blocks = false;
        consensus.signet_challenge.clear();
        consensus.nSubsidyHalvingInterval = 100000;
        consensus.BIP16Exception = uint256();
        // 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
        consensus.CSVHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.SegwitHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.MinBIP9WarningHeight = std::numeric_limits<int>::max(); // Dogecoin does not use BIP9
        consensus.powLimit = uint256S("0x00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); // ~uint256(0) >> 20;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 60; // 1 minute
        consensus.fPowAllowMinDifficultyBlocks = false;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 1900; // 95% of 10,080
        consensus.nMinerConfirmationWindow = 2000; // 60 * 24 * 7 = 10,080 blocks, or one week
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay

        // Deployment of Taproot (BIPs 340-342)
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay

        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000051737530b00a8ed4e3e");
        consensus.defaultAssumeValid = uint256S("0x014c0753de886b81dffa11e99f37416930b67d55bda17589d886aeb053414942"); // 3,692,828
        consensus.nAssumeValidMinTime = 60 * 60 * 24 * 7 * 2;

        consensus.fSimplifiedRewards = false;
        consensus.fShortEarlyCoinbase = true;

        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = true;
        consensus.nAuxPowHeight = 371337;

        /**
         * 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] = 0xc0;
        pchMessageStart[1] = 0xc0;
        pchMessageStart[2] = 0xc0;
        pchMessageStart[3] = 0xc0;
        nDefaultPort = 22556;
        nPruneAfterHeight = 100000;
        m_assumed_blockchain_size = 350;
        m_assumed_chain_state_size = 6;

        genesis = CreateGenesisBlock(1386325540, 99943, 0x1e0ffff0, 1, 88 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x1a91e3dace36e2be3bf030a65679fe821aa1d6ef92e7c9902eb318182c355691"));
        assert(genesis.hashMerkleRoot == uint256S("0x5b2a3f53f605d62c53e62932dac6925e3d74afa5a4b459745c36d42d0ed26a69"));

        // Note that of those which support the service bits prefix, most only support a subset of
        // possible options.
        // This is fine at runtime as we'll fall back to using them as an addrfetch if they don't support the
        // service bits we want, but we should get them updated to support all service bits wanted by any
        // release ASAP to avoid it where possible.
        vSeeds.emplace_back("seed.multidoge.org");
        vSeeds.emplace_back("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] = {0x02, 0xFA, 0xCA, 0xFD};
        base58Prefixes[EXT_SECRET_KEY] = {0x02, 0xFA, 0xC3, 0x98};

        bech32_hrp = "doge";

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

        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        m_is_test_chain = false;
        m_is_mockable_chain = false;

        checkpointData = {
            {
                {      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 from RPC: getchaintxstats 4096 954c7c66dee51f0a3fb1edb26200b735f5275fe54d9505c76ebd2bcabac36f1e
            /* nTime    */ 1613217680,
            /* nTxCount */ 71035468,
            /* dTxRate  */ 0.46,
        };
    }
};

/**
 * Testnet (v3)
 */
class CTestNetParams : public CChainParams {
public:
    CTestNetParams() {
        strNetworkID = CBaseChainParams::TESTNET;
        consensus.signet_blocks = false;
        consensus.signet_challenge.clear();
        consensus.nSubsidyHalvingInterval = 100000;
        consensus.BIP16Exception = uint256();
        // 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.CSVHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.SegwitHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.MinBIP9WarningHeight = std::numeric_limits<int>::max(); // Dogecoin does not use BIP9
        consensus.powLimit = uint256S("0x00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); // ~uint256(0) >> 20;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 60; // 1 minute
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 750; // 2 days (note this is significantly lower than Bitcoin standard)
        consensus.nMinerConfirmationWindow = 1000; // 60 * 24 * 7 = 10,080 blocks, or one week
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay

        // Deployment of Taproot (BIPs 340-342)
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1619222400; // April 24th, 2021
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay

        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000006e68e7ec07b3d");
        consensus.defaultAssumeValid = uint256S("0x1f19a9290d1f83a59bd8e05c5b1216dca14fc580fe548f64150575cad98d4714"); // 3149245
        consensus.nAssumeValidMinTime = 60 * 60 * 24 * 7 * 2;

        consensus.fSimplifiedRewards = false;
        consensus.fShortEarlyCoinbase = true;

        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = false;
        consensus.nAuxPowHeight = 158100;

        pchMessageStart[0] = 0xfc;
        pchMessageStart[1] = 0xc1;
        pchMessageStart[2] = 0xb7;
        pchMessageStart[3] = 0xdc;
        nDefaultPort = 44556;
        nPruneAfterHeight = 1000;
        m_assumed_blockchain_size = 40;
        m_assumed_chain_state_size = 2;

        genesis = CreateGenesisBlock(1391503289, 997879, 0x1e0ffff0, 1, 88 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        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.emplace_back("testseed.jrn.me.uk", true);

        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,113);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,241);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};

        bech32_hrp = "tdge";

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

        fDefaultConsistencyChecks = false;
        fRequireStandard = false;
        m_is_test_chain = true;
        m_is_mockable_chain = false;

        checkpointData = {
            {
                {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 from RPC: getchaintxstats 4096 a113c41c00934f940a41f99d18b2ad9aefd183a4b7fe80527e1e6c12779bd024
            /* nTime    */ 1613217942,
            /* nTxCount */ 4186373,
            /* dTxRate  */ 0.05,
        };
    }
};

/**
 * Signet
 */
class SigNetParams : public CChainParams {
public:
    explicit SigNetParams(const ArgsManager& args) {
        std::vector<uint8_t> bin;
        vSeeds.clear();

        if (!args.IsArgSet("-signetchallenge")) {
            // Dogecoin: Use OP_FALSE as challenge, as we have no default Signet
            bin = ParseHex("50");
        } else {
            const auto signet_challenge = args.GetArgs("-signetchallenge");
            if (signet_challenge.size() != 1) {
                throw std::runtime_error(strprintf("%s: -signetchallenge cannot be multiple values.", __func__));
            }
            bin = ParseHex(signet_challenge[0]);
            LogPrintf("Signet with challenge %s\n", signet_challenge[0]);
        }

        consensus.nMinimumChainWork = uint256{};
        consensus.defaultAssumeValid = uint256{};
        m_assumed_blockchain_size = 0;
        m_assumed_chain_state_size = 0;
        chainTxData = ChainTxData{
            0,
            0,
            0,
        };

        if (args.IsArgSet("-signetseednode")) {
            vSeeds = args.GetArgs("-signetseednode");
        }

        strNetworkID = CBaseChainParams::SIGNET;
        consensus.signet_blocks = true;
        consensus.signet_challenge.assign(bin.begin(), bin.end());
        consensus.nSubsidyHalvingInterval = 100000;
        consensus.BIP16Exception = uint256{};
        consensus.BIP34Height = 1;
        consensus.BIP34Hash = uint256{};
        consensus.BIP65Height = 1;
        consensus.BIP66Height = 1;
        consensus.CSVHeight = 1;
        consensus.SegwitHeight = 1;
        consensus.nPowTargetTimespan = 4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 60; // 1 minute
        consensus.fPowAllowMinDifficultyBlocks = false;
        consensus.fPowNoRetargeting = false;
        consensus.nAssumeValidMinTime = 60 * 60 * 24 * 7 * 2;
        consensus.nRuleChangeActivationThreshold = 1900; // 95% of 2000
        consensus.nMinerConfirmationWindow = 2000; // nPowTargetTimespan / nPowTargetSpacing
        consensus.MinBIP9WarningHeight = 0;
        consensus.powLimit = uint256S("0x0000f77ae0000000000000000000000000000000000000000000000000000000");
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay

        // Activation of Taproot (BIPs 340-342)
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay

        consensus.fSimplifiedRewards = true;
        consensus.fShortEarlyCoinbase = true;

        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = true;
        consensus.nAuxPowHeight = 0;

        // message start is defined as the first 4 bytes of the sha256d of the block script
        CHashWriter h(SER_DISK, 0);
        h << consensus.signet_challenge;
        uint256 hash = h.GetHash();
        memcpy(pchMessageStart, hash.begin(), 4);

        nDefaultPort = 55556;
        nPruneAfterHeight = 1000;

        genesis = CreateGenesisBlock(1622364566, 81621, 0x1f00f77a, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0xf21a2c00a3b58b3f1b245de5e30955c00784040a3e7042edb0d2eedd1fd085a5"));
        assert(genesis.hashMerkleRoot == uint256S("0xb60e6a649c2c43248d6d8da2fb19daa337511fabfe3875f382adb686474fc021"));

        vFixedSeeds.clear();

        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,113);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,241);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};

        bech32_hrp = "tdge";

        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        m_is_test_chain = true;
        m_is_mockable_chain = false;
    }
};

/**
 * Regression test
 */
class CRegTestParams : public CChainParams {
public:
    explicit CRegTestParams(const ArgsManager& args) {
        strNetworkID =  CBaseChainParams::REGTEST;
        consensus.signet_blocks = false;
        consensus.signet_challenge.clear();
        consensus.nSubsidyHalvingInterval = 150;
        consensus.BIP16Exception = uint256();
        // Dogecoin: Raise this a long way so it's below 3 * COINBASE_MATURITY still
        consensus.BIP34Height = 1000; // BIP34 activated on regtest (Used in functional tests)
        consensus.BIP34Hash = uint256();
        consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in functional tests)
        consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in functional tests)
        // Dogecoin: Note this needs to be a multiple of nMinerConfirmationWindow
        consensus.CSVHeight = 720; // CSV activated on regtest (Used in rpc activation tests)
        consensus.SegwitHeight = 0; // SEGWIT is always activated on regtest unless overridden
        consensus.MinBIP9WarningHeight = 0;
        consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
        consensus.nPowTargetTimespan =  4 * 60 * 60; // pre-digishield: 4 hours
        consensus.nPowTargetSpacing = 60; // regtest: 60 second blocks
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowNoRetargeting = true;
        consensus.nRuleChangeActivationThreshold = 108; // 75% for testchains
        consensus.nMinerConfirmationWindow = 144; // Faster than normal for regtest (144 instead of 10080)

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay

        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay

        consensus.nMinimumChainWork = uint256{};
        consensus.defaultAssumeValid = uint256{};
        consensus.nAssumeValidMinTime = 60 * 60 * 24 * 7 * 2 / 10; // One tenth of main/test networks

        consensus.fSimplifiedRewards = true;
        consensus.fShortEarlyCoinbase = false;

        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
        consensus.fStrictChainId = true;
        consensus.nAuxPowHeight = 0;

        pchMessageStart[0] = 0xfa;
        pchMessageStart[1] = 0xbf;
        pchMessageStart[2] = 0xb5;
        pchMessageStart[3] = 0xda;
        nDefaultPort = 18444;
        nPruneAfterHeight = 1000;
        m_assumed_blockchain_size = 0;
        m_assumed_chain_state_size = 0;

        UpdateActivationParametersFromArgs(args);

        genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 88 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x3d2160a3b5dc4a9d62e7e66a295f70313ac808440ef7400d6c0772171ce973a5"));
        assert(genesis.hashMerkleRoot == uint256S("0x5b2a3f53f605d62c53e62932dac6925e3d74afa5a4b459745c36d42d0ed26a69"));

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

        fDefaultConsistencyChecks = true;
        fRequireStandard = true;
        m_is_test_chain = true;
        m_is_mockable_chain = true;

        checkpointData = {
            {
                {0, uint256S("3d2160a3b5dc4a9d62e7e66a295f70313ac808440ef7400d6c0772171ce973a5")},
            }
        };

        chainTxData = ChainTxData{
            0,
            0,
            0
        };

        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,113);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,241);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};

        bech32_hrp = "dcrt";
    }

    /**
     * Allows modifying the Version Bits regtest parameters.
     */
    void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int min_activation_height)
    {
        consensus.vDeployments[d].nStartTime = nStartTime;
        consensus.vDeployments[d].nTimeout = nTimeout;
        consensus.vDeployments[d].min_activation_height = min_activation_height;
    }
    void UpdateActivationParametersFromArgs(const ArgsManager& args);
};

void CRegTestParams::UpdateActivationParametersFromArgs(const ArgsManager& args)
{
    if (args.IsArgSet("-segwitheight")) {
        int64_t height = args.GetArg("-segwitheight", consensus.SegwitHeight);
        if (height < -1 || height >= std::numeric_limits<int>::max()) {
            throw std::runtime_error(strprintf("Activation height %ld for segwit is out of valid range. Use -1 to disable segwit.", height));
        } else if (height == -1) {
            LogPrintf("Segwit disabled for testing\n");
            height = std::numeric_limits<int>::max();
        }
        consensus.SegwitHeight = static_cast<int>(height);
    }

    if (!args.IsArgSet("-vbparams")) return;

    for (const std::string& strDeployment : args.GetArgs("-vbparams")) {
        std::vector<std::string> vDeploymentParams;
        boost::split(vDeploymentParams, strDeployment, boost::is_any_of(":"));
        if (vDeploymentParams.size() < 3 || 4 < vDeploymentParams.size()) {
            throw std::runtime_error("Version bits parameters malformed, expecting deployment:start:end[:min_activation_height]");
        }
        int64_t nStartTime, nTimeout;
        int min_activation_height = 0;
        if (!ParseInt64(vDeploymentParams[1], &nStartTime)) {
            throw std::runtime_error(strprintf("Invalid nStartTime (%s)", vDeploymentParams[1]));
        }
        if (!ParseInt64(vDeploymentParams[2], &nTimeout)) {
            throw std::runtime_error(strprintf("Invalid nTimeout (%s)", vDeploymentParams[2]));
        }
        if (vDeploymentParams.size() >= 4 && !ParseInt32(vDeploymentParams[3], &min_activation_height)) {
            throw std::runtime_error(strprintf("Invalid min_activation_height (%s)", vDeploymentParams[3]));
        }
        bool found = false;
        for (int j=0; j < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j) {
            if (vDeploymentParams[0] == VersionBitsDeploymentInfo[j].name) {
                UpdateVersionBitsParameters(Consensus::DeploymentPos(j), nStartTime, nTimeout, min_activation_height);
                found = true;
                LogPrintf("Setting version bits activation parameters for %s to start=%ld, timeout=%ld, min_activation_height=%d\n", vDeploymentParams[0], nStartTime, nTimeout, min_activation_height);
                break;
            }
        }
        if (!found) {
            throw std::runtime_error(strprintf("Invalid deployment (%s)", vDeploymentParams[0]));
        }
    }
}

static std::unique_ptr<const CChainParams> globalChainParams;

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

std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const std::string& chain)
{
    if (chain == CBaseChainParams::MAIN) {
        return std::unique_ptr<CChainParams>(new CMainParams());
    } else if (chain == CBaseChainParams::TESTNET) {
        return std::unique_ptr<CChainParams>(new CTestNetParams());
    } else if (chain == CBaseChainParams::SIGNET) {
        return std::unique_ptr<CChainParams>(new SigNetParams(args));
    } else if (chain == CBaseChainParams::REGTEST) {
        return std::unique_ptr<CChainParams>(new CRegTestParams(args));
    }
    throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
}

void SelectParams(const std::string& network)
{
    SelectBaseParams(network);
    globalChainParams = CreateChainParams(gArgs, network);
}