// 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=1231006505, nBits=1d00ffff, nNonce=2083236893, 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 = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
    const CScript genesisOutputScript = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << 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 = 210000;
        consensus.BIP16Exception = uint256S("0x00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22");
        consensus.BIP34Height = 227931;
        consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
        consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
        consensus.BIP66Height = 363725; // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
        consensus.CSVHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.SegwitHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.MinBIP9WarningHeight = 483840; // segwit activation height + miner confirmation window
        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 = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008

        // Deployment of Taproot (BIPs 340-342)
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1230767999; // December 31, 2008

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

        consensus.fShortEarlyCoinbase = true;

        /**
         * 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 = 8333;
        nPruneAfterHeight = 100000;
        m_assumed_blockchain_size = 350;
        m_assumed_chain_state_size = 6;

        genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
        assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));

        // 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.bitcoin.sipa.be"); // Pieter Wuille, only supports x1, x5, x9, and xd
        vSeeds.emplace_back("dnsseed.bluematt.me"); // Matt Corallo, only supports x9
        vSeeds.emplace_back("dnsseed.bitcoin.dashjr.org"); // Luke Dashjr
        vSeeds.emplace_back("seed.bitcoinstats.com"); // Christian Decker, supports x1 - xf
        vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch"); // Jonas Schnelli, only supports x1, x5, x9, and xd
        vSeeds.emplace_back("seed.btc.petertodd.org"); // Peter Todd, only supports x1, x5, x9, and xd
        vSeeds.emplace_back("seed.bitcoin.sprovoost.nl"); // Sjors Provoost
        vSeeds.emplace_back("dnsseed.emzy.de"); // Stephan Oeste
        vSeeds.emplace_back("seed.bitcoin.wiz.biz"); // Jason Maurice

        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 = 210000;
        consensus.BIP16Exception = uint256S("0x00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105");
        consensus.BIP34Height = 21111;
        consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
        consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
        consensus.BIP66Height = 330776; // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
        consensus.CSVHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.SegwitHeight = std::numeric_limits<int>::max(); // Disabled on Dogecoin
        consensus.MinBIP9WarningHeight = 836640; // segwit activation height + miner confirmation window
        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 = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008

        // Deployment of Taproot (BIPs 340-342)
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1230767999; // December 31, 2008

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

        consensus.fShortEarlyCoinbase = true;

        pchMessageStart[0] = 0xfc;
        pchMessageStart[1] = 0xc1;
        pchMessageStart[2] = 0xb7;
        pchMessageStart[3] = 0xdc;
        nDefaultPort = 18333;
        nPruneAfterHeight = 1000;
        m_assumed_blockchain_size = 40;
        m_assumed_chain_state_size = 2;

        genesis = CreateGenesisBlock(1296688602, 414098458, 0x1d00ffff, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
        assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));

        vFixedSeeds.clear();
        vSeeds.clear();
        // nodes with support for servicebits filtering should be at the top
        vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch");
        vSeeds.emplace_back("seed.tbtc.petertodd.org");
        vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl");
        vSeeds.emplace_back("testnet-seed.bluematt.me"); // Just a static list of stable node(s), only supports x9

        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")) {
            bin = ParseHex("512103ad5e0edad18cb1f0fc0d28a3d4f1f3e445640337489abb10404f2d1e086be430210359ef5021964fe22d6f8e05b2463c9540ce96883fe3b278760f048f5189f2e6c452ae");
            vSeeds.emplace_back("178.128.221.177");
            vSeeds.emplace_back("2a01:7c8:d005:390::5");
            vSeeds.emplace_back("v7ajjeirttkbnt32wpy3c6w3emwnfr3fkla7hpxcfokr3ysd3kqtzmqd.onion:38333");

            consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000000000000019fd16269a");
            consensus.defaultAssumeValid = uint256S("0x0000002a1de0f46379358c1fd09906f7ac59adf3712323ed90eb59e4c183c020"); // 9434
            m_assumed_blockchain_size = 1;
            m_assumed_chain_state_size = 0;
            chainTxData = ChainTxData{
                // Data from RPC: getchaintxstats 4096 0000002a1de0f46379358c1fd09906f7ac59adf3712323ed90eb59e4c183c020
                /* nTime    */ 1603986000,
                /* nTxCount */ 9582,
                /* dTxRate  */ 0.00159272030651341,
            };
        } 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]);

            consensus.nMinimumChainWork = uint256{};
            consensus.defaultAssumeValid = uint256{};
            m_assumed_blockchain_size = 0;
            m_assumed_chain_state_size = 0;
            chainTxData = ChainTxData{
                0,
                0,
                0,
            };
            LogPrintf("Signet with challenge %s\n", signet_challenge[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 = 210000;
        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("00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
        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

        // 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.fShortEarlyCoinbase = true;

        // 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 = 38333;
        nPruneAfterHeight = 1000;

        genesis = CreateGenesisBlock(1598918400, 52613770, 0x1e0377ae, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6"));
        assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));

        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 2016)
        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_TAPROOT].bit = 2;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
        consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;

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

        consensus.fShortEarlyCoinbase = false;

        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, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
        assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));

        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("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206")},
            }
        };

        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)
    {
        consensus.vDeployments[d].nStartTime = nStartTime;
        consensus.vDeployments[d].nTimeout = nTimeout;
    }
    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) {
            throw std::runtime_error("Version bits parameters malformed, expecting deployment:start:end");
        }
        int64_t nStartTime, nTimeout;
        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]));
        }
        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);
                found = true;
                LogPrintf("Setting version bits activation parameters for %s to start=%ld, timeout=%ld\n", vDeploymentParams[0], nStartTime, nTimeout);
                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);
}