kernel_2chainparams_8cpp_source.html

// Copyright (c) 2010 Satoshi Nakamoto

// Copyright (c) 2009-present 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 <kernel/chainparams.h>


#include <chainparamsseeds.h>

#include <consensus/amount.h>

#include <consensus/merkle.h>

#include <consensus/params.h>

#include <crypto/hex_base.h>

#include <hash.h>

#include <kernel/messagestartchars.h>

#include <primitives/block.h>

#include <primitives/transaction.h>

#include <script/interpreter.h>

#include <script/script.h>

#include <script/verify_flags.h>

#include <uint256.h>

#include <util/chaintype.h>

#include <util/log.h>

#include <util/strencodings.h>


#include <algorithm>

#include <array>

#include <cassert>

#include <cstdint>

#include <cstring>

#include <iterator>

#include <map>

#include <span>

#include <utility>


using namespace util::hex_literals;


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.version = 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 = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";

    const CScript genesisOutputScript = CScript() << "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"_hex << OP_CHECKSIG;

    return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);

}


void CChainParams::ApplyDeploymentOptions(const DeploymentOptions& opts)

{

    for (const auto& [dep, height] : opts.activation_heights) {

        switch (dep) {

        case Consensus::BuriedDeployment::DEPLOYMENT_SEGWIT:

            consensus.SegwitHeight = int{height};

            break;

        case Consensus::BuriedDeployment::DEPLOYMENT_HEIGHTINCB:

            consensus.BIP34Height = int{height};

            break;

        case Consensus::BuriedDeployment::DEPLOYMENT_DERSIG:

            consensus.BIP66Height = int{height};

            break;

        case Consensus::BuriedDeployment::DEPLOYMENT_CLTV:

            consensus.BIP65Height = int{height};

            break;

        case Consensus::BuriedDeployment::DEPLOYMENT_CSV:

            consensus.CSVHeight = int{height};

            break;

        }

    }


    for (const auto& [deployment_pos, version_bits_params] : opts.version_bits_parameters) {

        consensus.vDeployments[deployment_pos].nStartTime = version_bits_params.start_time;

        consensus.vDeployments[deployment_pos].nTimeout = version_bits_params.timeout;

        consensus.vDeployments[deployment_pos].min_activation_height = version_bits_params.min_activation_height;

    }

}


class CMainParams : public CChainParams {

public:

    CMainParams(const MainNetOptions& opts) {

        m_chain_type = ChainType::MAIN;

        consensus.signet_blocks = false;

        consensus.signet_challenge.clear();

        consensus.nSubsidyHalvingInterval = 210000;

        consensus.script_flag_exceptions.emplace( // BIP16 exception

            uint256{"00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22"}, SCRIPT_VERIFY_NONE);

        consensus.script_flag_exceptions.emplace( // Taproot exception

            uint256{"0000000000000000000f14c35b2d841e986ab5441de8c585d5ffe55ea1e395ad"}, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS);

        consensus.BIP34Height = 227931;

        consensus.BIP34Hash = uint256{"000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8"};

        consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0

        consensus.BIP66Height = 363725; // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931

        consensus.CSVHeight = 419328; // 000000000000000004a1b34462cb8aeebd5799177f7a29cf28f2d1961716b5b5

        consensus.SegwitHeight = 481824; // 0000000000000000001c8018d9cb3b742ef25114f27563e3fc4a1902167f9893

        consensus.MinBIP9WarningHeight = 711648; // taproot activation height + miner confirmation window

        consensus.powLimit = uint256{"00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};

        consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks

        consensus.nPowTargetSpacing = 10 * 60;

        consensus.fPowAllowMinDifficultyBlocks = false;

        consensus.enforce_BIP94 = false;

        consensus.fPowNoRetargeting = false;

        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

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1815; // 90%

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;


        ApplyDeploymentOptions(opts.dep_opts);


        consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000001128750f82f4c366153a3a030"};

        consensus.defaultAssumeValid = uint256{"00000000000000000000ccebd6d74d9194d8dcdc1d177c478e094bfad51ba5ac"}; // 938343


        pchMessageStart[0] = 0xf9;

        pchMessageStart[1] = 0xbe;

        pchMessageStart[2] = 0xb4;

        pchMessageStart[3] = 0xd9;

        nDefaultPort = 8333;

        nPruneAfterHeight = 100000;

        m_assumed_blockchain_size = 856;

        m_assumed_chain_state_size = 14;


        genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);

        consensus.hashGenesisBlock = genesis.GetHash();

        assert(consensus.hashGenesisBlock == uint256{"000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"});

        assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});


        // 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("dnsseed.bluematt.me."); // Matt Corallo, only supports x9

        vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch."); // Jonas Schnelli, only supports x1, x5, x9, and xd

        vSeeds.emplace_back("seed.btc.petertodd.net."); // 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

        vSeeds.emplace_back("seed.mainnet.achownodes.xyz."); // Ava Chow, only supports x1, x5, x9, x49, x809, x849, xd, x400, x404, x408, x448, xc08, xc48, x40c


        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);

        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);

        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,128);

        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};

        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};


        bech32_hrp = "bc";


        vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_main), std::end(chainparams_seed_main));


        fDefaultConsistencyChecks = false;

        m_is_mockable_chain = false;


        m_assumeutxo_data = {

            {

                .height = 840'000,

                .hash_serialized = AssumeutxoHash{uint256{"a2a5521b1b5ab65f67818e5e8eccabb7171a517f9e2382208f77687310768f96"}},

                .m_chain_tx_count = 991032194,

                .blockhash = uint256{"0000000000000000000320283a032748cef8227873ff4872689bf23f1cda83a5"},

            },

            {

                .height = 880'000,

                .hash_serialized = AssumeutxoHash{uint256{"dbd190983eaf433ef7c15f78a278ae42c00ef52e0fd2a54953782175fbadcea9"}},

                .m_chain_tx_count = 1145604538,

                .blockhash = uint256{"000000000000000000010b17283c3c400507969a9c2afd1dcf2082ec5cca2880"},

            },

            {

                .height = 910'000,

                .hash_serialized = AssumeutxoHash{uint256{"4daf8a17b4902498c5787966a2b51c613acdab5df5db73f196fa59a4da2f1568"}},

                .m_chain_tx_count = 1226586151,

                .blockhash = uint256{"0000000000000000000108970acb9522ffd516eae17acddcb1bd16469194a821"},

            },

            {

                .height = 935'000,

                .hash_serialized = AssumeutxoHash{uint256{"e4b90ef9eae834f56c4b64d2d50143cee10ad87994c614d7d04125e2a6025050"}},

                .m_chain_tx_count = 1305397408,

                .blockhash = uint256{"0000000000000000000147034958af1652b2b91bba607beacc5e72a56f0fb5ee"},

            }

        };


        chainTxData = ChainTxData{

            // Data from RPC: getchaintxstats 4096 00000000000000000000ccebd6d74d9194d8dcdc1d177c478e094bfad51ba5ac

            .nTime    = 1772055173,

            .tx_count = 1315805869,

            .dTxRate  = 5.40111006496122,

        };


        // Generated by headerssync-params.py on 2026-02-25.

        m_headers_sync_params = HeadersSyncParams{

            .commitment_period = 641,

            .redownload_buffer_size = 15218, // 15218/641 = ~23.7 commitments

        };

    }

};


class CTestNetParams : public CChainParams {

public:

    CTestNetParams(const TestNetOptions& opts) {

        m_chain_type = ChainType::TESTNET;

        consensus.signet_blocks = false;

        consensus.signet_challenge.clear();

        consensus.nSubsidyHalvingInterval = 210000;

        consensus.script_flag_exceptions.emplace( // BIP16 exception

            uint256{"00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105"}, SCRIPT_VERIFY_NONE);

        consensus.BIP34Height = 21111;

        consensus.BIP34Hash = uint256{"0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8"};

        consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6

        consensus.BIP66Height = 330776; // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182

        consensus.CSVHeight = 770112; // 00000000025e930139bac5c6c31a403776da130831ab85be56578f3fa75369bb

        consensus.SegwitHeight = 834624; // 00000000002b980fcd729daaa248fd9316a5200e9b367f4ff2c42453e84201ca

        consensus.MinBIP9WarningHeight = 2013984; // taproot activation height + miner confirmation window

        consensus.powLimit = uint256{"00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};

        consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks

        consensus.nPowTargetSpacing = 10 * 60;

        consensus.fPowAllowMinDifficultyBlocks = true;

        consensus.enforce_BIP94 = false;

        consensus.fPowNoRetargeting = false;

        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

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1512; // 75%

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;


        ApplyDeploymentOptions(opts.dep_opts);


        consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000000000017dde1c649f3708d14b6"};

        consensus.defaultAssumeValid = uint256{"000000007a61e4230b28ac5cb6b5e5a0130de37ac1faf2f8987d2fa6505b67f4"}; // 4842348


        pchMessageStart[0] = 0x0b;

        pchMessageStart[1] = 0x11;

        pchMessageStart[2] = 0x09;

        pchMessageStart[3] = 0x07;

        nDefaultPort = 18333;

        nPruneAfterHeight = 1000;

        m_assumed_blockchain_size = 245;

        m_assumed_chain_state_size = 19;


        genesis = CreateGenesisBlock(1296688602, 414098458, 0x1d00ffff, 1, 50 * COIN);

        consensus.hashGenesisBlock = genesis.GetHash();

        assert(consensus.hashGenesisBlock == uint256{"000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"});

        assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});


        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.net.");

        vSeeds.emplace_back("testnet-seed.bluematt.me."); // Just a static list of stable node(s), only supports x9

        vSeeds.emplace_back("seed.testnet.achownodes.xyz."); // Ava Chow, only supports x1, x5, x9, x49, x809, x849, xd, x400, x404, x408, x448, xc08, xc48, x40c


        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);

        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);

        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);

        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};

        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};


        bech32_hrp = "tb";


        vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_test), std::end(chainparams_seed_test));


        fDefaultConsistencyChecks = false;

        m_is_mockable_chain = false;


        m_assumeutxo_data = {

            {

                .height = 2'500'000,

                .hash_serialized = AssumeutxoHash{uint256{"f841584909f68e47897952345234e37fcd9128cd818f41ee6c3ca68db8071be7"}},

                .m_chain_tx_count = 66484552,

                .blockhash = uint256{"0000000000000093bcb68c03a9a168ae252572d348a2eaeba2cdf9231d73206f"},

            },

            {

                .height = 4'840'000,

                .hash_serialized = AssumeutxoHash{uint256{"ce6bb677bb2ee9789c4a1c9d73e6683c53fc20e8fdbedbdaaf468982a0c8db2a"}},

                .m_chain_tx_count = 536078574,

                .blockhash = uint256{"00000000000000f4971a7fb37fbdff89315b69a2e1920c467654a382f0d64786"},

            }

        };


        chainTxData = ChainTxData{

            // Data from RPC: getchaintxstats 4096 000000007a61e4230b28ac5cb6b5e5a0130de37ac1faf2f8987d2fa6505b67f4

            .nTime    = 1772051651,

            .tx_count = 536108416,

            .dTxRate  = 0.02691479016257117,

        };


        // Generated by headerssync-params.py on 2026-02-25.

        m_headers_sync_params = HeadersSyncParams{

            .commitment_period = 673,

            .redownload_buffer_size = 14460, // 14460/673 = ~21.5 commitments

        };

    }

};


class CTestNet4Params : public CChainParams {

public:

    CTestNet4Params(const TestNetOptions& opts) {

        m_chain_type = ChainType::TESTNET4;

        consensus.signet_blocks = false;

        consensus.signet_challenge.clear();

        consensus.nSubsidyHalvingInterval = 210000;

        consensus.BIP34Height = 1;

        consensus.BIP34Hash = uint256{};

        consensus.BIP65Height = 1;

        consensus.BIP66Height = 1;

        consensus.CSVHeight = 1;

        consensus.SegwitHeight = 1;

        consensus.MinBIP9WarningHeight = 0;

        consensus.powLimit = uint256{"00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};

        consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks

        consensus.nPowTargetSpacing = 10 * 60;

        consensus.fPowAllowMinDifficultyBlocks = true;

        consensus.enforce_BIP94 = true;

        consensus.fPowNoRetargeting = false;


        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

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1512; // 75%

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;


        ApplyDeploymentOptions(opts.dep_opts);


        consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000000000009a0fe15d0177d086304"};

        consensus.defaultAssumeValid = uint256{"0000000002368b1e4ee27e2e85676ae6f9f9e69579b29093e9a82c170bf7cf8a"}; // 123613


        pchMessageStart[0] = 0x1c;

        pchMessageStart[1] = 0x16;

        pchMessageStart[2] = 0x3f;

        pchMessageStart[3] = 0x28;

        nDefaultPort = 48333;

        nPruneAfterHeight = 1000;

        m_assumed_blockchain_size = 31;

        m_assumed_chain_state_size = 2;


        const char* testnet4_genesis_msg = "03/May/2024 000000000000000000001ebd58c244970b3aa9d783bb001011fbe8ea8e98e00e";

        const CScript testnet4_genesis_script = CScript() << "000000000000000000000000000000000000000000000000000000000000000000"_hex << OP_CHECKSIG;

        genesis = CreateGenesisBlock(testnet4_genesis_msg,

                testnet4_genesis_script,

                1714777860,

                393743547,

                0x1d00ffff,

                1,

                50 * COIN);

        consensus.hashGenesisBlock = genesis.GetHash();

        assert(consensus.hashGenesisBlock == uint256{"00000000da84f2bafbbc53dee25a72ae507ff4914b867c565be350b0da8bf043"});

        assert(genesis.hashMerkleRoot == uint256{"7aa0a7ae1e223414cb807e40cd57e667b718e42aaf9306db9102fe28912b7b4e"});


        vFixedSeeds.clear();

        vSeeds.clear();

        // nodes with support for servicebits filtering should be at the top

        vSeeds.emplace_back("seed.testnet4.bitcoin.sprovoost.nl."); // Sjors Provoost

        vSeeds.emplace_back("seed.testnet4.wiz.biz."); // Jason Maurice


        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);

        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);

        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);

        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};

        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};


        bech32_hrp = "tb";


        vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_testnet4), std::end(chainparams_seed_testnet4));


        fDefaultConsistencyChecks = false;

        m_is_mockable_chain = false;


        m_assumeutxo_data = {

            {

                .height = 90'000,

                .hash_serialized = AssumeutxoHash{uint256{"784fb5e98241de66fdd429f4392155c9e7db5c017148e66e8fdbc95746f8b9b5"}},

                .m_chain_tx_count = 11347043,

                .blockhash = uint256{"0000000002ebe8bcda020e0dd6ccfbdfac531d2f6a81457191b99fc2df2dbe3b"},

            },

            {

                .height = 120'000,

                .hash_serialized = AssumeutxoHash{uint256{"10b05d05ad468d0971162e1b222a4aa66caca89da2bb2a93f8f37fb29c4794b0"}},

                .m_chain_tx_count = 14141057,

                .blockhash = uint256{"000000000bd2317e51b3c5794981c35ba894ce27d3e772d5c39ecd9cbce01dc8"},

            }

        };


        chainTxData = ChainTxData{

            // Data from RPC: getchaintxstats 4096 0000000002368b1e4ee27e2e85676ae6f9f9e69579b29093e9a82c170bf7cf8a

            .nTime    = 1772013387,

            .tx_count = 14191421,

            .dTxRate  = 0.01848579579528412,

        };


        // Generated by headerssync-params.py on 2026-02-25.

        m_headers_sync_params = HeadersSyncParams{

            .commitment_period = 606,

            .redownload_buffer_size = 16092, // 16092/606 = ~26.6 commitments

        };

    }

};


class SigNetParams : public CChainParams {

public:

    explicit SigNetParams(const SigNetOptions& options)

    {

        std::vector<uint8_t> bin;

        vFixedSeeds.clear();

        vSeeds.clear();


        if (!options.challenge) {

            bin = "512103ad5e0edad18cb1f0fc0d28a3d4f1f3e445640337489abb10404f2d1e086be430210359ef5021964fe22d6f8e05b2463c9540ce96883fe3b278760f048f5189f2e6c452ae"_hex_v_u8;

            vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_signet), std::end(chainparams_seed_signet));

            vSeeds.emplace_back("seed.signet.bitcoin.sprovoost.nl.");

            vSeeds.emplace_back("seed.signet.achownodes.xyz."); // Ava Chow, only supports x1, x5, x9, x49, x809, x849, xd, x400, x404, x408, x448, xc08, xc48, x40c


            consensus.nMinimumChainWork = uint256{"00000000000000000000000000000000000000000000000000000b463ea0a4b8"};

            consensus.defaultAssumeValid = uint256{"00000008414aab61092ef93f1aacc54cf9e9f16af29ddad493b908a01ff5c329"}; // 293175

            m_assumed_blockchain_size = 24;

            m_assumed_chain_state_size = 4;

            chainTxData = ChainTxData{

                // Data from RPC: getchaintxstats 4096 00000008414aab61092ef93f1aacc54cf9e9f16af29ddad493b908a01ff5c329

                .nTime    = 1772055248,

                .tx_count = 28676833,

                .dTxRate  = 0.06736623436338929,

            };

        } else {

            bin = *options.challenge;

            consensus.nMinimumChainWork = uint256{};

            consensus.defaultAssumeValid = uint256{};

            m_assumed_blockchain_size = 0;

            m_assumed_chain_state_size = 0;

            chainTxData = ChainTxData{

                0,

                0,

                0,

            };

            LogInfo("Signet with challenge %s", HexStr(bin));

        }


        if (options.seeds) {

            vSeeds = *options.seeds;

        }


        m_chain_type = ChainType::SIGNET;

        consensus.signet_blocks = true;

        consensus.signet_challenge.assign(bin.begin(), bin.end());

        consensus.nSubsidyHalvingInterval = 210000;

        consensus.BIP34Height = 1;

        consensus.BIP34Hash = uint256{};

        consensus.BIP65Height = 1;

        consensus.BIP66Height = 1;

        consensus.CSVHeight = 1;

        consensus.SegwitHeight = 1;

        consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks

        consensus.nPowTargetSpacing = 10 * 60;

        consensus.fPowAllowMinDifficultyBlocks = false;

        consensus.enforce_BIP94 = false;

        consensus.fPowNoRetargeting = false;

        consensus.MinBIP9WarningHeight = 0;

        consensus.powLimit = uint256{"00000377ae000000000000000000000000000000000000000000000000000000"};

        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

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1815; // 90%

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;


        ApplyDeploymentOptions(options.dep_opts);


        // message start is defined as the first 4 bytes of the sha256d of the block script

        HashWriter h{};

        h << consensus.signet_challenge;

        uint256 hash = h.GetHash();

        std::copy_n(hash.begin(), 4, pchMessageStart.begin());


        nDefaultPort = 38333;

        nPruneAfterHeight = 1000;


        genesis = CreateGenesisBlock(1598918400, 52613770, 0x1e0377ae, 1, 50 * COIN);

        consensus.hashGenesisBlock = genesis.GetHash();

        assert(consensus.hashGenesisBlock == uint256{"00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6"});

        assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});


        m_assumeutxo_data = {

            {

                .height = 160'000,

                .hash_serialized = AssumeutxoHash{uint256{"fe0a44309b74d6b5883d246cb419c6221bcccf0b308c9b59b7d70783dbdf928a"}},

                .m_chain_tx_count = 2289496,

                .blockhash = uint256{"0000003ca3c99aff040f2563c2ad8f8ec88bd0fd6b8f0895cfaf1ef90353a62c"},

            },

            {

                .height = 290'000,

                .hash_serialized = AssumeutxoHash{uint256{"97267e000b4b876800167e71b9123f1529d13b14308abec2888bbd2160d14545"}},

                .m_chain_tx_count = 28547497,

                .blockhash = uint256{"0000000577f2741bb30cd9d39d6d71b023afbeb9764f6260786a97969d5c9ac0"},

            }

        };


        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);

        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);

        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);

        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};

        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};


        bech32_hrp = "tb";


        fDefaultConsistencyChecks = false;

        m_is_mockable_chain = false;


        // Generated by headerssync-params.py on 2026-02-25.

        m_headers_sync_params = HeadersSyncParams{

            .commitment_period = 620,

            .redownload_buffer_size = 15724, // 15724/620 = ~25.4 commitments

        };

    }

};


class CRegTestParams : public CChainParams

{

public:

    explicit CRegTestParams(const RegTestOptions& opts)

    {

        m_chain_type = ChainType::REGTEST;

        consensus.signet_blocks = false;

        consensus.signet_challenge.clear();

        consensus.nSubsidyHalvingInterval = 150;

        consensus.BIP34Height = 1; // Always active unless overridden

        consensus.BIP34Hash = uint256();

        consensus.BIP65Height = 1;  // Always active unless overridden

        consensus.BIP66Height = 1;  // Always active unless overridden

        consensus.CSVHeight = 1;    // Always active unless overridden

        consensus.SegwitHeight = 0; // Always active unless overridden

        consensus.MinBIP9WarningHeight = 0;

        consensus.powLimit = uint256{"7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};

        consensus.nPowTargetTimespan = 24 * 60 * 60; // one day

        consensus.nPowTargetSpacing = 10 * 60;

        consensus.fPowAllowMinDifficultyBlocks = true;

        consensus.enforce_BIP94 = opts.enforce_bip94;

        consensus.fPowNoRetargeting = true;


        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_TESTDUMMY].threshold = 108; // 75%

        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 144; // Faster than normal for regtest (144 instead of 2016)


        consensus.nMinimumChainWork = uint256{};

        consensus.defaultAssumeValid = uint256{};


        pchMessageStart[0] = 0xfa;

        pchMessageStart[1] = 0xbf;

        pchMessageStart[2] = 0xb5;

        pchMessageStart[3] = 0xda;

        nDefaultPort = 18444;

        nPruneAfterHeight = opts.fastprune ? 100 : 1000;

        m_assumed_blockchain_size = 0;

        m_assumed_chain_state_size = 0;


        ApplyDeploymentOptions(opts.dep_opts);


        genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 50 * COIN);

        consensus.hashGenesisBlock = genesis.GetHash();

        assert(consensus.hashGenesisBlock == uint256{"0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"});

        assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});


        vFixedSeeds.clear();

        vSeeds.clear();

        vSeeds.emplace_back("dummySeed.invalid.");


        fDefaultConsistencyChecks = true;

        m_is_mockable_chain = true;


        m_assumeutxo_data = {

            {   // For use by unit tests

                .height = 110,

                .hash_serialized = AssumeutxoHash{uint256{"86e9a1205b418b16dde3a18a78c730e30137e28466bda5dbf6b33ab8fc05447c"}},

                .m_chain_tx_count = 111,

                .blockhash = uint256{"135eec25a6fb277884e5824e7aa7d052c4868161c99a5122170b5266f86c273d"},

            },

            {

                // For use by fuzz target src/test/fuzz/utxo_snapshot.cpp

                .height = 200,

                .hash_serialized = AssumeutxoHash{uint256{"17dcc016d188d16068907cdeb38b75691a118d43053b8cd6a25969419381d13a"}},

                .m_chain_tx_count = 201,

                .blockhash = uint256{"385901ccbd69dff6bbd00065d01fb8a9e464dede7cfe0372443884f9b1dcf6b9"},

            },

            {

                // For use by test/functional/feature_assumeutxo.py and test/functional/tool_bitcoin_chainstate.py

                .height = 299,

                .hash_serialized = AssumeutxoHash{uint256{"106b2c56233e378a824cf0d5ff2be42ed32c72f1605c9be288d00942908a40ac"}},

                .m_chain_tx_count = 334,

                .blockhash = uint256{"0c552ced4721c249a389eb9b08cb8da261cd46f0e7b5f9d064d48f3113406853"},

            },

        };


        chainTxData = ChainTxData{

            .nTime = 0,

            .tx_count = 0,

            .dTxRate = 0.001, // Set a non-zero rate to make it testable

        };


        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);

        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);

        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);

        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};

        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};


        bech32_hrp = "bcrt";


        // Copied from Testnet4.

        m_headers_sync_params = HeadersSyncParams{

            .commitment_period = 275,

            .redownload_buffer_size = 7017, // 7017/275 = ~25.5 commitments

        };

    }

};


std::unique_ptr<const CChainParams> CChainParams::SigNet(const SigNetOptions& options)

{

    return std::make_unique<const SigNetParams>(options);

}


std::unique_ptr<const CChainParams> CChainParams::RegTest(const RegTestOptions& options)

{

    return std::make_unique<const CRegTestParams>(options);

}


std::unique_ptr<const CChainParams> CChainParams::Main(const MainNetOptions& options)

{

    return std::make_unique<const CMainParams>(options);

}


std::unique_ptr<const CChainParams> CChainParams::TestNet(const TestNetOptions& options)

{

    return std::make_unique<const CTestNetParams>(options);

}


std::unique_ptr<const CChainParams> CChainParams::TestNet4(const TestNetOptions& options)

{

    return std::make_unique<const CTestNet4Params>(options);

}


std::vector<int> CChainParams::GetAvailableSnapshotHeights() const

{

    std::vector<int> heights;

    heights.reserve(m_assumeutxo_data.size());


    for (const auto& data : m_assumeutxo_data) {

        heights.emplace_back(data.height);

    }

    return heights;

}


std::optional<ChainType> GetNetworkForMagic(const MessageStartChars& message)

{

    const auto mainnet_msg = CChainParams::Main()->MessageStart();

    const auto testnet_msg = CChainParams::TestNet()->MessageStart();

    const auto testnet4_msg = CChainParams::TestNet4()->MessageStart();

    const auto regtest_msg = CChainParams::RegTest()->MessageStart();

    const auto signet_msg = CChainParams::SigNet()->MessageStart();


    if (std::ranges::equal(message, mainnet_msg)) {

        return ChainType::MAIN;

    } else if (std::ranges::equal(message, testnet_msg)) {

        return ChainType::TESTNET;

    } else if (std::ranges::equal(message, testnet4_msg)) {

        return ChainType::TESTNET4;

    } else if (std::ranges::equal(message, regtest_msg)) {

        return ChainType::REGTEST;

    } else if (std::ranges::equal(message, signet_msg)) {

        return ChainType::SIGNET;

    }

    return std::nullopt;

}

amount.h

CAmount
int64_t CAmount
Amount in satoshis (Can be negative)
Definition: amount.h:12

COIN
static constexpr CAmount COIN
The amount of satoshis in one BTC.
Definition: amount.h:15

block.h

chainparamsseeds.h

chainparams_seed_test
static const uint8_t chainparams_seed_test[]
Definition: chainparamsseeds.h:2248

chainparams_seed_signet
static const uint8_t chainparams_seed_signet[]
Definition: chainparamsseeds.h:2075

chainparams_seed_main
static const uint8_t chainparams_seed_main[]
List of fixed seed nodes for the bitcoin network AUTOGENERATED by contrib/seeds/generate-seeds....
Definition: chainparamsseeds.h:13

chainparams_seed_testnet4
static const uint8_t chainparams_seed_testnet4[]
Definition: chainparamsseeds.h:2432

chaintype.h

ChainType::SIGNET
@ SIGNET

ChainType::MAIN
@ MAIN

ChainType::TESTNET
@ TESTNET

ChainType::REGTEST
@ REGTEST

ChainType::TESTNET4
@ TESTNET4

CBlockHeader::nNonce
uint32_t nNonce
Definition: block.h:35

CBlockHeader::nBits
uint32_t nBits
Definition: block.h:34

CBlockHeader::nTime
uint32_t nTime
Definition: block.h:33

CBlockHeader::nVersion
int32_t nVersion
Definition: block.h:30

CBlockHeader::hashPrevBlock
uint256 hashPrevBlock
Definition: block.h:31

CBlockHeader::hashMerkleRoot
uint256 hashMerkleRoot
Definition: block.h:32

CBlockHeader::GetHash
uint256 GetHash() const
Definition: block.cpp:14

CBlock
Definition: block.h:74

CBlock::vtx
std::vector< CTransactionRef > vtx
Definition: block.h:77

CChainParams
CChainParams defines various tweakable parameters of a given instance of the Bitcoin system.
Definition: chainparams.h:77

CChainParams::TestNet4
static std::unique_ptr< const CChainParams > TestNet4()
Definition: chainparams.h:179

CChainParams::m_assumed_chain_state_size
uint64_t m_assumed_chain_state_size
Definition: chainparams.h:189

CChainParams::pchMessageStart
MessageStartChars pchMessageStart
Definition: chainparams.h:185

CChainParams::Main
static std::unique_ptr< const CChainParams > Main()
Definition: chainparams.h:175

CChainParams::bech32_hrp
std::string bech32_hrp
Definition: chainparams.h:192

CChainParams::GetAvailableSnapshotHeights
std::vector< int > GetAvailableSnapshotHeights() const
Definition: chainparams.cpp:689

CChainParams::ApplyDeploymentOptions
void ApplyDeploymentOptions(const DeploymentOptions &opts)
Definition: chainparams.cpp:76

CChainParams::genesis
CBlock genesis
Definition: chainparams.h:194

CChainParams::m_assumed_blockchain_size
uint64_t m_assumed_blockchain_size
Definition: chainparams.h:188

CChainParams::vFixedSeeds
std::vector< uint8_t > vFixedSeeds
Definition: chainparams.h:195

CChainParams::fDefaultConsistencyChecks
bool fDefaultConsistencyChecks
Definition: chainparams.h:196

CChainParams::m_headers_sync_params
HeadersSyncParams m_headers_sync_params
Definition: chainparams.h:200

CChainParams::base58Prefixes
std::vector< unsigned char > base58Prefixes[MAX_BASE58_TYPES]
Definition: chainparams.h:191

CChainParams::consensus
Consensus::Params consensus
Definition: chainparams.h:184

CChainParams::EXT_PUBLIC_KEY
@ EXT_PUBLIC_KEY
Definition: chainparams.h:83

CChainParams::SECRET_KEY
@ SECRET_KEY
Definition: chainparams.h:82

CChainParams::EXT_SECRET_KEY
@ EXT_SECRET_KEY
Definition: chainparams.h:84

CChainParams::SCRIPT_ADDRESS
@ SCRIPT_ADDRESS
Definition: chainparams.h:81

CChainParams::PUBKEY_ADDRESS
@ PUBKEY_ADDRESS
Definition: chainparams.h:80

CChainParams::TestNet
static std::unique_ptr< const CChainParams > TestNet()
Definition: chainparams.h:177

CChainParams::m_assumeutxo_data
std::vector< AssumeutxoData > m_assumeutxo_data
Definition: chainparams.h:198

CChainParams::SigNet
static std::unique_ptr< const CChainParams > SigNet()
Definition: chainparams.h:173

CChainParams::vSeeds
std::vector< std::string > vSeeds
Definition: chainparams.h:190

CChainParams::m_is_mockable_chain
bool m_is_mockable_chain
Definition: chainparams.h:197

CChainParams::RegTest
static std::unique_ptr< const CChainParams > RegTest()
Definition: chainparams.h:171

CChainParams::m_chain_type
ChainType m_chain_type
Definition: chainparams.h:193

CChainParams::nDefaultPort
uint16_t nDefaultPort
Definition: chainparams.h:186

CChainParams::nPruneAfterHeight
uint64_t nPruneAfterHeight
Definition: chainparams.h:187

CChainParams::chainTxData
ChainTxData chainTxData
Definition: chainparams.h:199

CMainParams
Main network on which people trade goods and services.
Definition: chainparams.cpp:108

CMainParams::CMainParams
CMainParams(const MainNetOptions &opts)
Definition: chainparams.cpp:110

CRegTestParams
Regression test: intended for private networks only.
Definition: chainparams.cpp:564

CRegTestParams::CRegTestParams
CRegTestParams(const RegTestOptions &opts)
Definition: chainparams.cpp:566

CScript
Serialized script, used inside transaction inputs and outputs.
Definition: script.h:406

CScriptNum
Definition: script.h:228

CTestNet4Params
Testnet (v4): public test network which is reset from time to time.
Definition: chainparams.cpp:336

CTestNet4Params::CTestNet4Params
CTestNet4Params(const TestNetOptions &opts)
Definition: chainparams.cpp:338

CTestNetParams
Testnet (v3): public test network which is reset from time to time.
Definition: chainparams.cpp:234

CTestNetParams::CTestNetParams
CTestNetParams(const TestNetOptions &opts)
Definition: chainparams.cpp:236

HashWriter
A writer stream (for serialization) that computes a 256-bit hash.
Definition: hash.h:109

SigNetParams
Signet: test network with an additional consensus parameter (see BIP325).
Definition: chainparams.cpp:443

SigNetParams::SigNetParams
SigNetParams(const SigNetOptions &options)
Definition: chainparams.cpp:445

base_blob::begin
constexpr unsigned char * begin()
Definition: uint256.h:101

base_blob::SetNull
constexpr void SetNull()
Definition: uint256.h:57

uint256
256-bit opaque blob.
Definition: uint256.h:196

data
static const PrecomputedData data
Precomputed COutPoint and CCoins values.
Definition: coinscache_sim.cpp:223

BlockMerkleRoot
uint256 BlockMerkleRoot(const CBlock &block, bool *mutated)
Definition: merkle.cpp:74

HexStr
std::string HexStr(const std::span< const uint8_t > s)
Convert a span of bytes to a lower-case hexadecimal string.
Definition: hex_base.cpp:30

hex_base.h

interpreter.h

script_verify_flag_name::SCRIPT_VERIFY_WITNESS
@ SCRIPT_VERIFY_WITNESS

script_verify_flag_name::SCRIPT_VERIFY_P2SH
@ SCRIPT_VERIFY_P2SH

SCRIPT_VERIFY_NONE
static constexpr script_verify_flags SCRIPT_VERIFY_NONE
Script verification flags.
Definition: interpreter.h:48

CreateGenesisBlock
static CBlock CreateGenesisBlock(const char *pszTimestamp, const CScript &genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount &genesisReward)
Definition: chainparams.cpp:37

GetNetworkForMagic
std::optional< ChainType > GetNetworkForMagic(const MessageStartChars &message)
Definition: chainparams.cpp:700

chainparams.h

log.h

LogInfo
#define LogInfo(...)
Definition: log.h:125

merkle.h

messagestartchars.h

MessageStartChars
std::array< uint8_t, 4 > MessageStartChars
Definition: messagestartchars.h:11

Consensus::DEPLOYMENT_TESTDUMMY
@ DEPLOYMENT_TESTDUMMY
Definition: params.h:39

Consensus::DEPLOYMENT_DERSIG
@ DEPLOYMENT_DERSIG
Definition: params.h:30

Consensus::DEPLOYMENT_CSV
@ DEPLOYMENT_CSV
Definition: params.h:31

Consensus::DEPLOYMENT_SEGWIT
@ DEPLOYMENT_SEGWIT
Definition: params.h:34

Consensus::DEPLOYMENT_HEIGHTINCB
@ DEPLOYMENT_HEIGHTINCB
Definition: params.h:28

Consensus::DEPLOYMENT_CLTV
@ DEPLOYMENT_CLTV
Definition: params.h:29

util::hex_literals
""_hex is a compile-time user-defined literal returning a std::array<std::byte>, equivalent to ParseH...
Definition: strencodings.h:386

params.h

transaction.h

MakeTransactionRef
static CTransactionRef MakeTransactionRef(Tx &&txIn)
Definition: transaction.h:404

script.h

OP_CHECKSIG
@ OP_CHECKSIG
Definition: script.h:191

strencodings.h

AssumeutxoHash
Definition: chainparams.h:25

CChainParams::DeploymentOptions
Definition: chainparams.h:139

CChainParams::DeploymentOptions::activation_heights
std::unordered_map< Consensus::BuriedDeployment, int > activation_heights
Definition: chainparams.h:141

CChainParams::DeploymentOptions::version_bits_parameters
std::unordered_map< Consensus::DeploymentPos, VersionBitsParameters > version_bits_parameters
Definition: chainparams.h:140

CChainParams::MainNetOptions
Definition: chainparams.h:162

CChainParams::MainNetOptions::dep_opts
DeploymentOptions dep_opts
Definition: chainparams.h:163

CChainParams::RegTestOptions
RegTestOptions holds configurations for creating a regtest CChainParams.
Definition: chainparams.h:156

CChainParams::RegTestOptions::enforce_bip94
bool enforce_bip94
Definition: chainparams.h:159

CChainParams::RegTestOptions::fastprune
bool fastprune
Definition: chainparams.h:158

CChainParams::RegTestOptions::dep_opts
DeploymentOptions dep_opts
Definition: chainparams.h:157

CChainParams::SigNetOptions
SigNetOptions holds configurations for creating a signet CChainParams.
Definition: chainparams.h:147

CChainParams::SigNetOptions::dep_opts
DeploymentOptions dep_opts
Definition: chainparams.h:148

CChainParams::SigNetOptions::challenge
std::optional< std::vector< uint8_t > > challenge
Definition: chainparams.h:149

CChainParams::SigNetOptions::seeds
std::optional< std::vector< std::string > > seeds
Definition: chainparams.h:150

CChainParams::TestNetOptions
Definition: chainparams.h:166

CChainParams::TestNetOptions::dep_opts
DeploymentOptions dep_opts
Definition: chainparams.h:167

CMutableTransaction
A mutable version of CTransaction.
Definition: transaction.h:358

CMutableTransaction::vout
std::vector< CTxOut > vout
Definition: transaction.h:360

CMutableTransaction::version
uint32_t version
Definition: transaction.h:361

CMutableTransaction::vin
std::vector< CTxIn > vin
Definition: transaction.h:359

ChainTxData
Holds various statistics on transactions within a chain.
Definition: chainparams.h:57

ChainTxData::nTime
int64_t nTime
UNIX timestamp of last known number of transactions.
Definition: chainparams.h:58

Consensus::BIP9Deployment::NEVER_ACTIVE
static constexpr int64_t NEVER_ACTIVE
Special value for nStartTime indicating that the deployment is never active.
Definition: params.h:82

Consensus::BIP9Deployment::NO_TIMEOUT
static constexpr int64_t NO_TIMEOUT
Constant for nTimeout very far in the future.
Definition: params.h:71

Consensus::Params::enforce_BIP94
bool enforce_BIP94
Enforce BIP94 timewarp attack mitigation.
Definition: params.h:122

Consensus::Params::BIP65Height
int BIP65Height
Block height at which BIP65 becomes active.
Definition: params.h:102

Consensus::Params::CSVHeight
int CSVHeight
Block height at which CSV (BIP68, BIP112 and BIP113) becomes active.
Definition: params.h:106

Consensus::Params::BIP34Hash
uint256 BIP34Hash
Definition: params.h:100

Consensus::Params::defaultAssumeValid
uint256 defaultAssumeValid
By default assume that the signatures in ancestors of this block are valid.
Definition: params.h:134

Consensus::Params::signet_challenge
std::vector< uint8_t > signet_challenge
Definition: params.h:141

Consensus::Params::signet_blocks
bool signet_blocks
If true, witness commitments contain a payload equal to a Bitcoin Script solution to the signet chall...
Definition: params.h:140

Consensus::Params::SegwitHeight
int SegwitHeight
Block height at which Segwit (BIP141, BIP143 and BIP147) becomes active.
Definition: params.h:110

Consensus::Params::BIP34Height
int BIP34Height
Block height and hash at which BIP34 becomes active.
Definition: params.h:99

Consensus::Params::nSubsidyHalvingInterval
int nSubsidyHalvingInterval
Definition: params.h:90

Consensus::Params::script_flag_exceptions
std::map< uint256, script_verify_flags > script_flag_exceptions
Hashes of blocks that.
Definition: params.h:97

Consensus::Params::hashGenesisBlock
uint256 hashGenesisBlock
Definition: params.h:89

Consensus::Params::MinBIP9WarningHeight
int MinBIP9WarningHeight
Don't warn about unknown BIP 9 activations below this height.
Definition: params.h:113

Consensus::Params::fPowNoRetargeting
bool fPowNoRetargeting
Definition: params.h:123

Consensus::Params::nMinimumChainWork
uint256 nMinimumChainWork
The best chain should have at least this much work.
Definition: params.h:132

Consensus::Params::nPowTargetTimespan
int64_t nPowTargetTimespan
Definition: params.h:125

Consensus::Params::BIP66Height
int BIP66Height
Block height at which BIP66 becomes active.
Definition: params.h:104

Consensus::Params::powLimit
uint256 powLimit
Proof of work parameters.
Definition: params.h:116

Consensus::Params::vDeployments
std::array< BIP9Deployment, MAX_VERSION_BITS_DEPLOYMENTS > vDeployments
Definition: params.h:114

Consensus::Params::nPowTargetSpacing
int64_t nPowTargetSpacing
Definition: params.h:124

Consensus::Params::fPowAllowMinDifficultyBlocks
bool fPowAllowMinDifficultyBlocks
Definition: params.h:117

HeadersSyncParams
Configuration for headers sync memory usage.
Definition: chainparams.h:64

HeadersSyncParams::commitment_period
size_t commitment_period
Distance in blocks between header commitments.
Definition: chainparams.h:66

uint256.h

assert
assert(!tx.IsCoinBase())

verify_flags.h