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chainparams.cpp
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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 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 <hash.h>
#include <kernel/messagestartchars.h>
#include <logging.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <script/interpreter.h>
#include <script/script.h>
#include <uint256.h>
#include <util/chaintype.h>
#include <util/strencodings.h>
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <cstring>
#include <type_traits>
using namespace util::hex_literals;
// Workaround MSVC bug triggering C7595 when calling consteval constructors in
// initializer lists.
// A fix may be on the way:
// https://developercommunity.visualstudio.com/t/consteval-conversion-function-fails/1579014
#if defined(_MSC_VER)
auto consteval_ctor(auto&& input) { return input; }
#else
#define consteval_ctor(input) (input)
#endif
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;
}
/**
* 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() << "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"_hex << OP_CHECKSIG;
return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
}
/**
* Main network on which people trade goods and services.
*/
class CMainParams : public CChainParams {
public:
CMainParams() {
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 = 483840; // segwit 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.nRuleChangeActivationThreshold = 1815; // 90% of 2016
consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
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 = 709632; // Approximately November 12th, 2021
consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000000b1f3b93b65b16d035a82be84"};
consensus.defaultAssumeValid = uint256{"00000000000000000001b658dd1120e82e66d2790811f89ede9742ada3ed6d77"}; // 886157
/**
* 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] = 0xf9;
pchMessageStart[1] = 0xbe;
pchMessageStart[2] = 0xb4;
pchMessageStart[3] = 0xd9;
nDefaultPort = 8333;
nPruneAfterHeight = 100000;
m_assumed_blockchain_size = 720;
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("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-list-of-p2p-nodes.us."); // Luke Dashjr
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 = consteval_ctor(uint256{"0000000000000000000320283a032748cef8227873ff4872689bf23f1cda83a5"}),
},
{
.height = 880'000,
.hash_serialized = AssumeutxoHash{uint256{"dbd190983eaf433ef7c15f78a278ae42c00ef52e0fd2a54953782175fbadcea9"}},
.m_chain_tx_count = 1145604538,
.blockhash = consteval_ctor(uint256{"000000000000000000010b17283c3c400507969a9c2afd1dcf2082ec5cca2880"}),
}
};
chainTxData = ChainTxData{
// Data from RPC: getchaintxstats 4096 00000000000000000001b658dd1120e82e66d2790811f89ede9742ada3ed6d77
.nTime = 1741017141,
.tx_count = 1161875261,
.dTxRate = 4.620728156243148,
};
}
};
/**
* Testnet (v3): public test network which is reset from time to time.
*/
class CTestNetParams : public CChainParams {
public:
CTestNetParams() {
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 = 836640; // segwit 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.nRuleChangeActivationThreshold = 1512; // 75% for testchains
consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
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 = uint256{"0000000000000000000000000000000000000000000015f5e0c9f13455b0eb17"};
consensus.defaultAssumeValid = uint256{"00000000000003fc7967410ba2d0a8a8d50daedc318d43e8baf1a9782c236a57"}; // 3974606
pchMessageStart[0] = 0x0b;
pchMessageStart[1] = 0x11;
pchMessageStart[2] = 0x09;
pchMessageStart[3] = 0x07;
nDefaultPort = 18333;
nPruneAfterHeight = 1000;
m_assumed_blockchain_size = 200;
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("seed.testnet.bitcoin.sprovoost.nl.");
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 = consteval_ctor(uint256{"0000000000000093bcb68c03a9a168ae252572d348a2eaeba2cdf9231d73206f"}),
}
};
chainTxData = ChainTxData{
// Data from RPC: getchaintxstats 4096 00000000000003fc7967410ba2d0a8a8d50daedc318d43e8baf1a9782c236a57
.nTime = 1741042082,
.tx_count = 475477615,
.dTxRate = 17.15933950357594,
};
}
};
/**
* Testnet (v4): public test network which is reset from time to time.
*/
class CTestNet4Params : public CChainParams {
public:
CTestNet4Params() {
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.nRuleChangeActivationThreshold = 1512; // 75% for testchains
consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
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::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{"0000000000000000000000000000000000000000000001d6dce8651b6094e4c1"};
consensus.defaultAssumeValid = uint256{"0000000000003ed4f08dbdf6f7d6b271a6bcffce25675cb40aa9fa43179a89f3"}; // 72600
pchMessageStart[0] = 0x1c;
pchMessageStart[1] = 0x16;
pchMessageStart[2] = 0x3f;
pchMessageStart[3] = 0x28;
nDefaultPort = 48333;
nPruneAfterHeight = 1000;
m_assumed_blockchain_size = 11;
m_assumed_chain_state_size = 1;
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 = {
{}
};
chainTxData = ChainTxData{
// Data from RPC: getchaintxstats 4096 0000000000003ed4f08dbdf6f7d6b271a6bcffce25675cb40aa9fa43179a89f3
.nTime = 1741070246,
.tx_count = 7653966,
.dTxRate = 1.239174414591965,
};
}
};
/**
* Signet: test network with an additional consensus parameter (see BIP325).
*/
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{"000000000000000000000000000000000000000000000000000002b517f3d1a1"};
consensus.defaultAssumeValid = uint256{"000000895a110f46e59eb82bbc5bfb67fa314656009c295509c21b4999f5180a"}; // 237722
m_assumed_blockchain_size = 9;
m_assumed_chain_state_size = 1;
chainTxData = ChainTxData{
// Data from RPC: getchaintxstats 4096 000000895a110f46e59eb82bbc5bfb67fa314656009c295509c21b4999f5180a
.nTime = 1741019645,
.tx_count = 16540736,
.dTxRate = 1.064918879911595,
};
} 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,
};
LogPrintf("Signet with challenge %s\n", 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.nRuleChangeActivationThreshold = 1815; // 90% of 2016
consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
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
// 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
// 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 = consteval_ctor(uint256{"0000003ca3c99aff040f2563c2ad8f8ec88bd0fd6b8f0895cfaf1ef90353a62c"}),
}
};
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;
}
};
/**
* Regression test: intended for private networks only. Has minimal difficulty to ensure that
* blocks can be found instantly.
*/
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.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_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{};
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;
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;
}
genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 50 * COIN);
consensus.hashGenesisBlock = genesis.GetHash();
assert(consensus.hashGenesisBlock == uint256{"0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"});
assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});
vFixedSeeds.clear(); //!< Regtest mode doesn't have any fixed seeds.
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{"6657b736d4fe4db0cbc796789e812d5dba7f5c143764b1b6905612f1830609d1"}},
.m_chain_tx_count = 111,
.blockhash = consteval_ctor(uint256{"696e92821f65549c7ee134edceeeeaaa4105647a3c4fd9f298c0aec0ab50425c"}),
},
{
// For use by fuzz target src/test/fuzz/utxo_snapshot.cpp
.height = 200,
.hash_serialized = AssumeutxoHash{uint256{"4f34d431c3e482f6b0d67b64609ece3964dc8d7976d02ac68dd7c9c1421738f2"}},
.m_chain_tx_count = 201,
.blockhash = consteval_ctor(uint256{"5e93653318f294fb5aa339d00bbf8cf1c3515488ad99412c37608b139ea63b27"}),
},
{
// For use by test/functional/feature_assumeutxo.py
.height = 299,
.hash_serialized = AssumeutxoHash{uint256{"a4bf3407ccb2cc0145c49ebba8fa91199f8a3903daf0883875941497d2493c27"}},
.m_chain_tx_count = 334,
.blockhash = consteval_ctor(uint256{"3bb7ce5eba0be48939b7a521ac1ba9316afee2c7bada3a0cca24188e6d7d96c0"}),
},
};
chainTxData = ChainTxData{
0,
0,
0
};
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";
}
};
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()
{
return std::make_unique<const CMainParams>();
}
std::unique_ptr<const CChainParams> CChainParams::TestNet()
{
return std::make_unique<const CTestNetParams>();
}
std::unique_ptr<const CChainParams> CChainParams::TestNet4()
{
return std::make_unique<const CTestNet4Params>();
}
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;
}