Bitcoin Core 30.99.0
P2P Digital Currency
chainparams.cpp
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1// Copyright (c) 2010 Satoshi Nakamoto
2// Copyright (c) 2009-present The Bitcoin Core developers
3// Distributed under the MIT software license, see the accompanying
4// file COPYING or http://www.opensource.org/licenses/mit-license.php.
5
6#include <kernel/chainparams.h>
7
8#include <chainparamsseeds.h>
9#include <consensus/amount.h>
10#include <consensus/merkle.h>
11#include <consensus/params.h>
12#include <crypto/hex_base.h>
13#include <hash.h>
14#include <kernel/messagestartchars.h>
15#include <primitives/block.h>
16#include <primitives/transaction.h>
17#include <script/interpreter.h>
18#include <script/script.h>
19#include <uint256.h>
20#include <util/chaintype.h>
21#include <util/log.h>
22#include <util/strencodings.h>
23
24#include <algorithm>
25#include <array>
26#include <cassert>
27#include <cstdint>
28#include <cstring>
29#include <iterator>
30#include <map>
31#include <span>
32#include <utility>
33
34using namespace util::hex_literals;
35
36static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
37{
38 CMutableTransaction txNew;
39 txNew.version = 1;
40 txNew.vin.resize(1);
41 txNew.vout.resize(1);
42 txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
43 txNew.vout[0].nValue = genesisReward;
44 txNew.vout[0].scriptPubKey = genesisOutputScript;
45
46 CBlock genesis;
47 genesis.nTime = nTime;
48 genesis.nBits = nBits;
49 genesis.nNonce = nNonce;
50 genesis.nVersion = nVersion;
51 genesis.vtx.push_back(MakeTransactionRef(std::move(txNew)));
52 genesis.hashPrevBlock.SetNull();
53 genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
54 return genesis;
55}
56
68static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
69{
70 const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
71 const CScript genesisOutputScript = CScript() << "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"_hex << OP_CHECKSIG;
72 return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
73}
74
78class CMainParams : public CChainParams {
79public:
80 CMainParams() {
81 m_chain_type = ChainType::MAIN;
82 consensus.signet_blocks = false;
83 consensus.signet_challenge.clear();
84 consensus.nSubsidyHalvingInterval = 210000;
85 consensus.script_flag_exceptions.emplace( // BIP16 exception
86 uint256{"00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22"}, SCRIPT_VERIFY_NONE);
87 consensus.script_flag_exceptions.emplace( // Taproot exception
88 uint256{"0000000000000000000f14c35b2d841e986ab5441de8c585d5ffe55ea1e395ad"}, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS);
89 consensus.BIP34Height = 227931;
90 consensus.BIP34Hash = uint256{"000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8"};
91 consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
92 consensus.BIP66Height = 363725; // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
93 consensus.CSVHeight = 419328; // 000000000000000004a1b34462cb8aeebd5799177f7a29cf28f2d1961716b5b5
94 consensus.SegwitHeight = 481824; // 0000000000000000001c8018d9cb3b742ef25114f27563e3fc4a1902167f9893
95 consensus.MinBIP9WarningHeight = 483840; // segwit activation height + miner confirmation window
96 consensus.powLimit = uint256{"00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};
97 consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
98 consensus.nPowTargetSpacing = 10 * 60;
99 consensus.fPowAllowMinDifficultyBlocks = false;
100 consensus.enforce_BIP94 = false;
101 consensus.fPowNoRetargeting = false;
102 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
103 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
104 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
105 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
106 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1815; // 90%
107 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;
108
109 // Deployment of Taproot (BIPs 340-342)
110 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
111 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1619222400; // April 24th, 2021
112 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
113 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 709632; // Approximately November 12th, 2021
114 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].threshold = 1815; // 90%
115 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].period = 2016;
116
117 consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000000dee8e2a309ad8a9820433c68"};
118 consensus.defaultAssumeValid = uint256{"00000000000000000000611fd22f2df7c8fbd0688745c3a6c3bb5109cc2a12cb"}; // 912683
119
125 pchMessageStart[0] = 0xf9;
126 pchMessageStart[1] = 0xbe;
127 pchMessageStart[2] = 0xb4;
128 pchMessageStart[3] = 0xd9;
129 nDefaultPort = 8333;
130 nPruneAfterHeight = 100000;
131 m_assumed_blockchain_size = 810;
132 m_assumed_chain_state_size = 14;
133
134 genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
135 consensus.hashGenesisBlock = genesis.GetHash();
136 assert(consensus.hashGenesisBlock == uint256{"000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"});
137 assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});
138
139 // Note that of those which support the service bits prefix, most only support a subset of
140 // possible options.
141 // This is fine at runtime as we'll fall back to using them as an addrfetch if they don't support the
142 // service bits we want, but we should get them updated to support all service bits wanted by any
143 // release ASAP to avoid it where possible.
144 vSeeds.emplace_back("seed.bitcoin.sipa.be."); // Pieter Wuille, only supports x1, x5, x9, and xd
145 vSeeds.emplace_back("dnsseed.bluematt.me."); // Matt Corallo, only supports x9
146 vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch."); // Jonas Schnelli, only supports x1, x5, x9, and xd
147 vSeeds.emplace_back("seed.btc.petertodd.net."); // Peter Todd, only supports x1, x5, x9, and xd
148 vSeeds.emplace_back("seed.bitcoin.sprovoost.nl."); // Sjors Provoost
149 vSeeds.emplace_back("dnsseed.emzy.de."); // Stephan Oeste
150 vSeeds.emplace_back("seed.bitcoin.wiz.biz."); // Jason Maurice
151 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
152
153 base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
154 base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
155 base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,128);
156 base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
157 base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};
158
159 bech32_hrp = "bc";
160
161 vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_main), std::end(chainparams_seed_main));
162
163 fDefaultConsistencyChecks = false;
164 m_is_mockable_chain = false;
165
166 m_assumeutxo_data = {
167 {
168 .height = 840'000,
169 .hash_serialized = AssumeutxoHash{uint256{"a2a5521b1b5ab65f67818e5e8eccabb7171a517f9e2382208f77687310768f96"}},
170 .m_chain_tx_count = 991032194,
171 .blockhash = uint256{"0000000000000000000320283a032748cef8227873ff4872689bf23f1cda83a5"},
172 },
173 {
174 .height = 880'000,
175 .hash_serialized = AssumeutxoHash{uint256{"dbd190983eaf433ef7c15f78a278ae42c00ef52e0fd2a54953782175fbadcea9"}},
176 .m_chain_tx_count = 1145604538,
177 .blockhash = uint256{"000000000000000000010b17283c3c400507969a9c2afd1dcf2082ec5cca2880"},
178 },
179 {
180 .height = 910'000,
181 .hash_serialized = AssumeutxoHash{uint256{"4daf8a17b4902498c5787966a2b51c613acdab5df5db73f196fa59a4da2f1568"}},
182 .m_chain_tx_count = 1226586151,
183 .blockhash = uint256{"0000000000000000000108970acb9522ffd516eae17acddcb1bd16469194a821"},
184 }
185 };
186
187 chainTxData = ChainTxData{
188 // Data from RPC: getchaintxstats 4096 00000000000000000000611fd22f2df7c8fbd0688745c3a6c3bb5109cc2a12cb
189 .nTime = 1756722903,
190 .tx_count = 1235299397,
191 .dTxRate = 5.456290459519495,
192 };
193
194 // Generated by headerssync-params.py on 2025-09-01.
195 m_headers_sync_params = HeadersSyncParams{
196 .commitment_period = 632,
197 .redownload_buffer_size = 15009, // 15009/632 = ~23.7 commitments
198 };
199 }
200};
201
205class CTestNetParams : public CChainParams {
206public:
207 CTestNetParams() {
208 m_chain_type = ChainType::TESTNET;
209 consensus.signet_blocks = false;
210 consensus.signet_challenge.clear();
211 consensus.nSubsidyHalvingInterval = 210000;
212 consensus.script_flag_exceptions.emplace( // BIP16 exception
213 uint256{"00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105"}, SCRIPT_VERIFY_NONE);
214 consensus.BIP34Height = 21111;
215 consensus.BIP34Hash = uint256{"0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8"};
216 consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
217 consensus.BIP66Height = 330776; // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
218 consensus.CSVHeight = 770112; // 00000000025e930139bac5c6c31a403776da130831ab85be56578f3fa75369bb
219 consensus.SegwitHeight = 834624; // 00000000002b980fcd729daaa248fd9316a5200e9b367f4ff2c42453e84201ca
220 consensus.MinBIP9WarningHeight = 836640; // segwit activation height + miner confirmation window
221 consensus.powLimit = uint256{"00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};
222 consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
223 consensus.nPowTargetSpacing = 10 * 60;
224 consensus.fPowAllowMinDifficultyBlocks = true;
225 consensus.enforce_BIP94 = false;
226 consensus.fPowNoRetargeting = false;
227 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
228 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
229 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
230 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
231 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1512; // 75%
232 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;
233
234 // Deployment of Taproot (BIPs 340-342)
235 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
236 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1619222400; // April 24th, 2021
237 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
238 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
239 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].threshold = 1512; // 75%
240 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].period = 2016;
241
242 consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000000000016dd270dd94fac1d7632"};
243 consensus.defaultAssumeValid = uint256{"0000000000000065c6c38258e201971a3fdfcc2ceee0dd6e85a6c022d45dee34"}; // 4550000
244
245 pchMessageStart[0] = 0x0b;
246 pchMessageStart[1] = 0x11;
247 pchMessageStart[2] = 0x09;
248 pchMessageStart[3] = 0x07;
249 nDefaultPort = 18333;
250 nPruneAfterHeight = 1000;
251 m_assumed_blockchain_size = 240;
252 m_assumed_chain_state_size = 19;
253
254 genesis = CreateGenesisBlock(1296688602, 414098458, 0x1d00ffff, 1, 50 * COIN);
255 consensus.hashGenesisBlock = genesis.GetHash();
256 assert(consensus.hashGenesisBlock == uint256{"000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"});
257 assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});
258
259 vFixedSeeds.clear();
260 vSeeds.clear();
261 // nodes with support for servicebits filtering should be at the top
262 vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch.");
263 vSeeds.emplace_back("seed.tbtc.petertodd.net.");
264 vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl.");
265 vSeeds.emplace_back("testnet-seed.bluematt.me."); // Just a static list of stable node(s), only supports x9
266 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
267
268 base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
269 base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
270 base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
271 base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
272 base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
273
274 bech32_hrp = "tb";
275
276 vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_test), std::end(chainparams_seed_test));
277
278 fDefaultConsistencyChecks = false;
279 m_is_mockable_chain = false;
280
281 m_assumeutxo_data = {
282 {
283 .height = 2'500'000,
284 .hash_serialized = AssumeutxoHash{uint256{"f841584909f68e47897952345234e37fcd9128cd818f41ee6c3ca68db8071be7"}},
285 .m_chain_tx_count = 66484552,
286 .blockhash = uint256{"0000000000000093bcb68c03a9a168ae252572d348a2eaeba2cdf9231d73206f"},
287 }
288 };
289
290 chainTxData = ChainTxData{
291 // Data from RPC: getchaintxstats 4096 0000000000000065c6c38258e201971a3fdfcc2ceee0dd6e85a6c022d45dee34
292 .nTime = 1751816758,
293 .tx_count = 508468699,
294 .dTxRate = 7.172978845985714,
295 };
296
297 // Generated by headerssync-params.py on 2025-09-03.
298 m_headers_sync_params = HeadersSyncParams{
299 .commitment_period = 628,
300 .redownload_buffer_size = 13460, // 13460/628 = ~21.4 commitments
301 };
302 }
303};
304
308class CTestNet4Params : public CChainParams {
309public:
310 CTestNet4Params() {
311 m_chain_type = ChainType::TESTNET4;
312 consensus.signet_blocks = false;
313 consensus.signet_challenge.clear();
314 consensus.nSubsidyHalvingInterval = 210000;
315 consensus.BIP34Height = 1;
316 consensus.BIP34Hash = uint256{};
317 consensus.BIP65Height = 1;
318 consensus.BIP66Height = 1;
319 consensus.CSVHeight = 1;
320 consensus.SegwitHeight = 1;
321 consensus.MinBIP9WarningHeight = 0;
322 consensus.powLimit = uint256{"00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};
323 consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
324 consensus.nPowTargetSpacing = 10 * 60;
325 consensus.fPowAllowMinDifficultyBlocks = true;
326 consensus.enforce_BIP94 = true;
327 consensus.fPowNoRetargeting = false;
328
329 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
330 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
331 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
332 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
333 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1512; // 75%
334 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;
335
336 // Deployment of Taproot (BIPs 340-342)
337 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
338 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
339 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
340 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
341 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].threshold = 1512; // 75%
342 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].period = 2016;
343
344 consensus.nMinimumChainWork = uint256{"00000000000000000000000000000000000000000000034a4690fe592dc49c7c"};
345 consensus.defaultAssumeValid = uint256{"000000000000000180a58e7fa3b0db84b5ea76377524894f53660d93ac839d9b"}; // 91000
346
347 pchMessageStart[0] = 0x1c;
348 pchMessageStart[1] = 0x16;
349 pchMessageStart[2] = 0x3f;
350 pchMessageStart[3] = 0x28;
351 nDefaultPort = 48333;
352 nPruneAfterHeight = 1000;
353 m_assumed_blockchain_size = 22;
354 m_assumed_chain_state_size = 2;
355
356 const char* testnet4_genesis_msg = "03/May/2024 000000000000000000001ebd58c244970b3aa9d783bb001011fbe8ea8e98e00e";
357 const CScript testnet4_genesis_script = CScript() << "000000000000000000000000000000000000000000000000000000000000000000"_hex << OP_CHECKSIG;
358 genesis = CreateGenesisBlock(testnet4_genesis_msg,
359 testnet4_genesis_script,
360 1714777860,
361 393743547,
362 0x1d00ffff,
363 1,
364 50 * COIN);
365 consensus.hashGenesisBlock = genesis.GetHash();
366 assert(consensus.hashGenesisBlock == uint256{"00000000da84f2bafbbc53dee25a72ae507ff4914b867c565be350b0da8bf043"});
367 assert(genesis.hashMerkleRoot == uint256{"7aa0a7ae1e223414cb807e40cd57e667b718e42aaf9306db9102fe28912b7b4e"});
368
369 vFixedSeeds.clear();
370 vSeeds.clear();
371 // nodes with support for servicebits filtering should be at the top
372 vSeeds.emplace_back("seed.testnet4.bitcoin.sprovoost.nl."); // Sjors Provoost
373 vSeeds.emplace_back("seed.testnet4.wiz.biz."); // Jason Maurice
374
375 base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
376 base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
377 base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
378 base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
379 base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
380
381 bech32_hrp = "tb";
382
383 vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_testnet4), std::end(chainparams_seed_testnet4));
384
385 fDefaultConsistencyChecks = false;
386 m_is_mockable_chain = false;
387
388 m_assumeutxo_data = {
389 {
390 .height = 90'000,
391 .hash_serialized = AssumeutxoHash{uint256{"784fb5e98241de66fdd429f4392155c9e7db5c017148e66e8fdbc95746f8b9b5"}},
392 .m_chain_tx_count = 11347043,
393 .blockhash = uint256{"0000000002ebe8bcda020e0dd6ccfbdfac531d2f6a81457191b99fc2df2dbe3b"},
394 }
395 };
396
397 chainTxData = ChainTxData{
398 // Data from RPC: getchaintxstats 4096 000000000000000180a58e7fa3b0db84b5ea76377524894f53660d93ac839d9b
399 .nTime = 1752470331,
400 .tx_count = 11414302,
401 .dTxRate = 0.2842619757327476,
402 };
403
404 // Generated by headerssync-params.py on 2025-09-03.
405 m_headers_sync_params = HeadersSyncParams{
406 .commitment_period = 275,
407 .redownload_buffer_size = 7017, // 7017/275 = ~25.5 commitments
408 };
409 }
410};
411
415class SigNetParams : public CChainParams {
416public:
417 explicit SigNetParams(const SigNetOptions& options)
418 {
419 std::vector<uint8_t> bin;
420 vFixedSeeds.clear();
421 vSeeds.clear();
422
423 if (!options.challenge) {
424 bin = "512103ad5e0edad18cb1f0fc0d28a3d4f1f3e445640337489abb10404f2d1e086be430210359ef5021964fe22d6f8e05b2463c9540ce96883fe3b278760f048f5189f2e6c452ae"_hex_v_u8;
425 vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_signet), std::end(chainparams_seed_signet));
426 vSeeds.emplace_back("seed.signet.bitcoin.sprovoost.nl.");
427 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
428
429 consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000000000000000000067d328e681a"};
430 consensus.defaultAssumeValid = uint256{"000000128586e26813922680309f04e1de713c7542fee86ed908f56368aefe2e"}; // 267665
431 m_assumed_blockchain_size = 20;
432 m_assumed_chain_state_size = 4;
433 chainTxData = ChainTxData{
434 // Data from RPC: getchaintxstats 4096 000000128586e26813922680309f04e1de713c7542fee86ed908f56368aefe2e
435 .nTime = 1756723017,
436 .tx_count = 26185472,
437 .dTxRate = 0.7452721495389969,
438 };
439 } else {
440 bin = *options.challenge;
441 consensus.nMinimumChainWork = uint256{};
442 consensus.defaultAssumeValid = uint256{};
443 m_assumed_blockchain_size = 0;
444 m_assumed_chain_state_size = 0;
445 chainTxData = ChainTxData{
446 0,
447 0,
448 0,
449 };
450 LogInfo("Signet with challenge %s", HexStr(bin));
451 }
452
453 if (options.seeds) {
454 vSeeds = *options.seeds;
455 }
456
457 m_chain_type = ChainType::SIGNET;
458 consensus.signet_blocks = true;
459 consensus.signet_challenge.assign(bin.begin(), bin.end());
460 consensus.nSubsidyHalvingInterval = 210000;
461 consensus.BIP34Height = 1;
462 consensus.BIP34Hash = uint256{};
463 consensus.BIP65Height = 1;
464 consensus.BIP66Height = 1;
465 consensus.CSVHeight = 1;
466 consensus.SegwitHeight = 1;
467 consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
468 consensus.nPowTargetSpacing = 10 * 60;
469 consensus.fPowAllowMinDifficultyBlocks = false;
470 consensus.enforce_BIP94 = false;
471 consensus.fPowNoRetargeting = false;
472 consensus.MinBIP9WarningHeight = 0;
473 consensus.powLimit = uint256{"00000377ae000000000000000000000000000000000000000000000000000000"};
474 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
475 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
476 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
477 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
478 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 1815; // 90%
479 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 2016;
480
481 // Activation of Taproot (BIPs 340-342)
482 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
483 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
484 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
485 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
486 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].threshold = 1815; // 90%
487 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].period = 2016;
488
489 // message start is defined as the first 4 bytes of the sha256d of the block script
490 HashWriter h{};
491 h << consensus.signet_challenge;
492 uint256 hash = h.GetHash();
493 std::copy_n(hash.begin(), 4, pchMessageStart.begin());
494
495 nDefaultPort = 38333;
496 nPruneAfterHeight = 1000;
497
498 genesis = CreateGenesisBlock(1598918400, 52613770, 0x1e0377ae, 1, 50 * COIN);
499 consensus.hashGenesisBlock = genesis.GetHash();
500 assert(consensus.hashGenesisBlock == uint256{"00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6"});
501 assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});
502
503 m_assumeutxo_data = {
504 {
505 .height = 160'000,
506 .hash_serialized = AssumeutxoHash{uint256{"fe0a44309b74d6b5883d246cb419c6221bcccf0b308c9b59b7d70783dbdf928a"}},
507 .m_chain_tx_count = 2289496,
508 .blockhash = uint256{"0000003ca3c99aff040f2563c2ad8f8ec88bd0fd6b8f0895cfaf1ef90353a62c"},
509 }
510 };
511
512 base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
513 base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
514 base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
515 base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
516 base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
517
518 bech32_hrp = "tb";
519
520 fDefaultConsistencyChecks = false;
521 m_is_mockable_chain = false;
522
523 // Generated by headerssync-params.py on 2025-09-03.
524 m_headers_sync_params = HeadersSyncParams{
525 .commitment_period = 390,
526 .redownload_buffer_size = 9584, // 9584/390 = ~24.6 commitments
527 };
528 }
529};
530
535class CRegTestParams : public CChainParams
536{
537public:
538 explicit CRegTestParams(const RegTestOptions& opts)
539 {
540 m_chain_type = ChainType::REGTEST;
541 consensus.signet_blocks = false;
542 consensus.signet_challenge.clear();
543 consensus.nSubsidyHalvingInterval = 150;
544 consensus.BIP34Height = 1; // Always active unless overridden
545 consensus.BIP34Hash = uint256();
546 consensus.BIP65Height = 1; // Always active unless overridden
547 consensus.BIP66Height = 1; // Always active unless overridden
548 consensus.CSVHeight = 1; // Always active unless overridden
549 consensus.SegwitHeight = 0; // Always active unless overridden
550 consensus.MinBIP9WarningHeight = 0;
551 consensus.powLimit = uint256{"7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"};
552 consensus.nPowTargetTimespan = 24 * 60 * 60; // one day
553 consensus.nPowTargetSpacing = 10 * 60;
554 consensus.fPowAllowMinDifficultyBlocks = true;
555 consensus.enforce_BIP94 = opts.enforce_bip94;
556 consensus.fPowNoRetargeting = true;
557
558 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
559 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
560 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
561 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
562 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].threshold = 108; // 75%
563 consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].period = 144; // Faster than normal for regtest (144 instead of 2016)
564
565 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
566 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
567 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
568 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
569 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].threshold = 108; // 75%
570 consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].period = 144;
571
572 consensus.nMinimumChainWork = uint256{};
573 consensus.defaultAssumeValid = uint256{};
574
575 pchMessageStart[0] = 0xfa;
576 pchMessageStart[1] = 0xbf;
577 pchMessageStart[2] = 0xb5;
578 pchMessageStart[3] = 0xda;
579 nDefaultPort = 18444;
580 nPruneAfterHeight = opts.fastprune ? 100 : 1000;
581 m_assumed_blockchain_size = 0;
582 m_assumed_chain_state_size = 0;
583
584 for (const auto& [dep, height] : opts.activation_heights) {
585 switch (dep) {
586 case Consensus::BuriedDeployment::DEPLOYMENT_SEGWIT:
587 consensus.SegwitHeight = int{height};
588 break;
589 case Consensus::BuriedDeployment::DEPLOYMENT_HEIGHTINCB:
590 consensus.BIP34Height = int{height};
591 break;
592 case Consensus::BuriedDeployment::DEPLOYMENT_DERSIG:
593 consensus.BIP66Height = int{height};
594 break;
595 case Consensus::BuriedDeployment::DEPLOYMENT_CLTV:
596 consensus.BIP65Height = int{height};
597 break;
598 case Consensus::BuriedDeployment::DEPLOYMENT_CSV:
599 consensus.CSVHeight = int{height};
600 break;
601 }
602 }
603
604 for (const auto& [deployment_pos, version_bits_params] : opts.version_bits_parameters) {
605 consensus.vDeployments[deployment_pos].nStartTime = version_bits_params.start_time;
606 consensus.vDeployments[deployment_pos].nTimeout = version_bits_params.timeout;
607 consensus.vDeployments[deployment_pos].min_activation_height = version_bits_params.min_activation_height;
608 }
609
610 genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 50 * COIN);
611 consensus.hashGenesisBlock = genesis.GetHash();
612 assert(consensus.hashGenesisBlock == uint256{"0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"});
613 assert(genesis.hashMerkleRoot == uint256{"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"});
614
615 vFixedSeeds.clear();
616 vSeeds.clear();
617 vSeeds.emplace_back("dummySeed.invalid.");
618
619 fDefaultConsistencyChecks = true;
620 m_is_mockable_chain = true;
621
622 m_assumeutxo_data = {
623 { // For use by unit tests
624 .height = 110,
625 .hash_serialized = AssumeutxoHash{uint256{"b952555c8ab81fec46f3d4253b7af256d766ceb39fb7752b9d18cdf4a0141327"}},
626 .m_chain_tx_count = 111,
627 .blockhash = uint256{"6affe030b7965ab538f820a56ef56c8149b7dc1d1c144af57113be080db7c397"},
628 },
629 {
630 // For use by fuzz target src/test/fuzz/utxo_snapshot.cpp
631 .height = 200,
632 .hash_serialized = AssumeutxoHash{uint256{"17dcc016d188d16068907cdeb38b75691a118d43053b8cd6a25969419381d13a"}},
633 .m_chain_tx_count = 201,
634 .blockhash = uint256{"385901ccbd69dff6bbd00065d01fb8a9e464dede7cfe0372443884f9b1dcf6b9"},
635 },
636 {
637 // For use by test/functional/feature_assumeutxo.py and test/functional/tool_bitcoin_chainstate.py
638 .height = 299,
639 .hash_serialized = AssumeutxoHash{uint256{"d2b051ff5e8eef46520350776f4100dd710a63447a8e01d917e92e79751a63e2"}},
640 .m_chain_tx_count = 334,
641 .blockhash = uint256{"7cc695046fec709f8c9394b6f928f81e81fd3ac20977bb68760fa1faa7916ea2"},
642 },
643 };
644
645 chainTxData = ChainTxData{
646 .nTime = 0,
647 .tx_count = 0,
648 .dTxRate = 0.001, // Set a non-zero rate to make it testable
649 };
650
651 base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
652 base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
653 base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
654 base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
655 base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
656
657 bech32_hrp = "bcrt";
658
659 // Copied from Testnet4.
660 m_headers_sync_params = HeadersSyncParams{
661 .commitment_period = 275,
662 .redownload_buffer_size = 7017, // 7017/275 = ~25.5 commitments
663 };
664 }
665};
666
667std::unique_ptr<const CChainParams> CChainParams::SigNet(const SigNetOptions& options)
668{
669 return std::make_unique<const SigNetParams>(options);
670}
671
672std::unique_ptr<const CChainParams> CChainParams::RegTest(const RegTestOptions& options)
673{
674 return std::make_unique<const CRegTestParams>(options);
675}
676
677std::unique_ptr<const CChainParams> CChainParams::Main()
678{
679 return std::make_unique<const CMainParams>();
680}
681
682std::unique_ptr<const CChainParams> CChainParams::TestNet()
683{
684 return std::make_unique<const CTestNetParams>();
685}
686
687std::unique_ptr<const CChainParams> CChainParams::TestNet4()
688{
689 return std::make_unique<const CTestNet4Params>();
690}
691
692std::vector<int> CChainParams::GetAvailableSnapshotHeights() const
693{
694 std::vector<int> heights;
695 heights.reserve(m_assumeutxo_data.size());
696
697 for (const auto& data : m_assumeutxo_data) {
698 heights.emplace_back(data.height);
699 }
700 return heights;
701}
702
703std::optional<ChainType> GetNetworkForMagic(const MessageStartChars& message)
704{
705 const auto mainnet_msg = CChainParams::Main()->MessageStart();
706 const auto testnet_msg = CChainParams::TestNet()->MessageStart();
707 const auto testnet4_msg = CChainParams::TestNet4()->MessageStart();
708 const auto regtest_msg = CChainParams::RegTest({})->MessageStart();
709 const auto signet_msg = CChainParams::SigNet({})->MessageStart();
710
711 if (std::ranges::equal(message, mainnet_msg)) {
712 return ChainType::MAIN;
713 } else if (std::ranges::equal(message, testnet_msg)) {
714 return ChainType::TESTNET;
715 } else if (std::ranges::equal(message, testnet4_msg)) {
716 return ChainType::TESTNET4;
717 } else if (std::ranges::equal(message, regtest_msg)) {
718 return ChainType::REGTEST;
719 } else if (std::ranges::equal(message, signet_msg)) {
720 return ChainType::SIGNET;
721 }
722 return std::nullopt;
723}
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
chainparams_seed_test
static const uint8_t chainparams_seed_test[]
Definition: chainparamsseeds.h:987
chainparams_seed_signet
static const uint8_t chainparams_seed_signet[]
Definition: chainparamsseeds.h:861
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:9
chainparams_seed_testnet4
static const uint8_t chainparams_seed_testnet4[]
Definition: chainparamsseeds.h:1169
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:15
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::m_assumed_chain_state_size
uint64_t m_assumed_chain_state_size
Definition: chainparams.h:171
CChainParams::pchMessageStart
MessageStartChars pchMessageStart
Definition: chainparams.h:167
CChainParams::Main
static std::unique_ptr< const CChainParams > Main()
Definition: chainparams.cpp:677
CChainParams::bech32_hrp
std::string bech32_hrp
Definition: chainparams.h:174
CChainParams::GetAvailableSnapshotHeights
std::vector< int > GetAvailableSnapshotHeights() const
Definition: chainparams.cpp:692
CChainParams::RegTest
static std::unique_ptr< const CChainParams > RegTest(const RegTestOptions &options)
Definition: chainparams.cpp:672
CChainParams::genesis
CBlock genesis
Definition: chainparams.h:176
CChainParams::m_assumed_blockchain_size
uint64_t m_assumed_blockchain_size
Definition: chainparams.h:170
CChainParams::vFixedSeeds
std::vector< uint8_t > vFixedSeeds
Definition: chainparams.h:177
CChainParams::fDefaultConsistencyChecks
bool fDefaultConsistencyChecks
Definition: chainparams.h:178
CChainParams::m_headers_sync_params
HeadersSyncParams m_headers_sync_params
Definition: chainparams.h:182
CChainParams::TestNet
static std::unique_ptr< const CChainParams > TestNet()
Definition: chainparams.cpp:682
CChainParams::base58Prefixes
std::vector< unsigned char > base58Prefixes[MAX_BASE58_TYPES]
Definition: chainparams.h:173
CChainParams::consensus
Consensus::Params consensus
Definition: chainparams.h:166
CChainParams::m_assumeutxo_data
std::vector< AssumeutxoData > m_assumeutxo_data
Definition: chainparams.h:180
CChainParams::vSeeds
std::vector< std::string > vSeeds
Definition: chainparams.h:172
CChainParams::m_is_mockable_chain
bool m_is_mockable_chain
Definition: chainparams.h:179
CChainParams::TestNet4
static std::unique_ptr< const CChainParams > TestNet4()
Definition: chainparams.cpp:687
CChainParams::m_chain_type
ChainType m_chain_type
Definition: chainparams.h:175
CChainParams::nDefaultPort
uint16_t nDefaultPort
Definition: chainparams.h:168
CChainParams::SigNet
static std::unique_ptr< const CChainParams > SigNet(const SigNetOptions &options)
Definition: chainparams.cpp:667
CChainParams::nPruneAfterHeight
uint64_t nPruneAfterHeight
Definition: chainparams.h:169
CChainParams::chainTxData
ChainTxData chainTxData
Definition: chainparams.h:181
CMainParams
Main network on which people trade goods and services.
Definition: chainparams.cpp:78
CRegTestParams
Regression test: intended for private networks only.
Definition: chainparams.cpp:536
CRegTestParams::CRegTestParams
CRegTestParams(const RegTestOptions &opts)
Definition: chainparams.cpp:538
CScript
Serialized script, used inside transaction inputs and outputs.
Definition: script.h:405
CTestNet4Params
Testnet (v4): public test network which is reset from time to time.
Definition: chainparams.cpp:308
CTestNetParams
Testnet (v3): public test network which is reset from time to time.
Definition: chainparams.cpp:205
HashWriter
A writer stream (for serialization) that computes a 256-bit hash.
Definition: hash.h:101
SigNetParams
Signet: test network with an additional consensus parameter (see BIP325).
Definition: chainparams.cpp:415
SigNetParams::SigNetParams
SigNetParams(const SigNetOptions &options)
Definition: chainparams.cpp:417
base_blob::begin
constexpr unsigned char * begin()
Definition: uint256.h:100
base_blob::SetNull
constexpr void SetNull()
Definition: uint256.h:55
uint256
256-bit opaque blob.
Definition: uint256.h:195
BlockMerkleRoot
uint256 BlockMerkleRoot(const CBlock &block, bool *mutated)
Definition: merkle.cpp:66
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
SCRIPT_VERIFY_NONE
static constexpr script_verify_flags SCRIPT_VERIFY_NONE
Script verification flags.
Definition: interpreter.h:47
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:36
GetNetworkForMagic
std::optional< ChainType > GetNetworkForMagic(const MessageStartChars &message)
Definition: chainparams.cpp:703
LogInfo
#define LogInfo(...)
Definition: log.h:95
MessageStartChars
std::array< uint8_t, 4 > MessageStartChars
Definition: messagestartchars.h:11
Consensus::DEPLOYMENT_TAPROOT
@ DEPLOYMENT_TAPROOT
Definition: params.h:36
Consensus::DEPLOYMENT_TESTDUMMY
@ DEPLOYMENT_TESTDUMMY
Definition: params.h:35
Consensus::DEPLOYMENT_DERSIG
@ DEPLOYMENT_DERSIG
Definition: params.h:28
Consensus::DEPLOYMENT_CSV
@ DEPLOYMENT_CSV
Definition: params.h:29
Consensus::DEPLOYMENT_SEGWIT
@ DEPLOYMENT_SEGWIT
Definition: params.h:30
Consensus::DEPLOYMENT_HEIGHTINCB
@ DEPLOYMENT_HEIGHTINCB
Definition: params.h:26
Consensus::DEPLOYMENT_CLTV
@ DEPLOYMENT_CLTV
Definition: params.h:27
test_vectors_musig2_generate.data
data
Definition: test_vectors_musig2_generate.py:98
util::hex_literals
""_hex is a compile-time user-defined literal returning a std::array<std::byte>, equivalent to ParseH...
Definition: strencodings.h:400
MakeTransactionRef
static CTransactionRef MakeTransactionRef(Tx &&txIn)
Definition: transaction.h:404
OP_CHECKSIG
@ OP_CHECKSIG
Definition: script.h:190
CChainParams::RegTestOptions
RegTestOptions holds configurations for creating a regtest CChainParams.
Definition: chainparams.h:150
CChainParams::RegTestOptions::version_bits_parameters
std::unordered_map< Consensus::DeploymentPos, VersionBitsParameters > version_bits_parameters
Definition: chainparams.h:151
CChainParams::RegTestOptions::activation_heights
std::unordered_map< Consensus::BuriedDeployment, int > activation_heights
Definition: chainparams.h:152
CChainParams::SigNetOptions
SigNetOptions holds configurations for creating a signet CChainParams.
Definition: chainparams.h:133
CChainParams::SigNetOptions::challenge
std::optional< std::vector< uint8_t > > challenge
Definition: chainparams.h:134
CChainParams::SigNetOptions::seeds
std::optional< std::vector< std::string > > seeds
Definition: chainparams.h:135
CMutableTransaction
A mutable version of CTransaction.
Definition: transaction.h:358
CMutableTransaction::vout
std::vector< CTxOut > vout
Definition: transaction.h:360
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::ALWAYS_ACTIVE
static constexpr int64_t ALWAYS_ACTIVE
Special value for nStartTime indicating that the deployment is always active.
Definition: params.h:73
Consensus::BIP9Deployment::NEVER_ACTIVE
static constexpr int64_t NEVER_ACTIVE
Special value for nStartTime indicating that the deployment is never active.
Definition: params.h:78
Consensus::BIP9Deployment::NO_TIMEOUT
static constexpr int64_t NO_TIMEOUT
Constant for nTimeout very far in the future.
Definition: params.h:67
Consensus::Params::enforce_BIP94
bool enforce_BIP94
Enforce BIP94 timewarp attack mitigation.
Definition: params.h:118
Consensus::Params::BIP65Height
int BIP65Height
Block height at which BIP65 becomes active.
Definition: params.h:98
Consensus::Params::CSVHeight
int CSVHeight
Block height at which CSV (BIP68, BIP112 and BIP113) becomes active.
Definition: params.h:102
Consensus::Params::BIP34Hash
uint256 BIP34Hash
Definition: params.h:96
Consensus::Params::defaultAssumeValid
uint256 defaultAssumeValid
By default assume that the signatures in ancestors of this block are valid.
Definition: params.h:130
Consensus::Params::signet_challenge
std::vector< uint8_t > signet_challenge
Definition: params.h:137
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:136
Consensus::Params::SegwitHeight
int SegwitHeight
Block height at which Segwit (BIP141, BIP143 and BIP147) becomes active.
Definition: params.h:106
Consensus::Params::BIP34Height
int BIP34Height
Block height and hash at which BIP34 becomes active.
Definition: params.h:95
Consensus::Params::nSubsidyHalvingInterval
int nSubsidyHalvingInterval
Definition: params.h:86
Consensus::Params::script_flag_exceptions
std::map< uint256, script_verify_flags > script_flag_exceptions
Hashes of blocks that.
Definition: params.h:93
Consensus::Params::hashGenesisBlock
uint256 hashGenesisBlock
Definition: params.h:85
Consensus::Params::MinBIP9WarningHeight
int MinBIP9WarningHeight
Don't warn about unknown BIP 9 activations below this height.
Definition: params.h:109
Consensus::Params::fPowNoRetargeting
bool fPowNoRetargeting
Definition: params.h:119
Consensus::Params::nMinimumChainWork
uint256 nMinimumChainWork
The best chain should have at least this much work.
Definition: params.h:128
Consensus::Params::nPowTargetTimespan
int64_t nPowTargetTimespan
Definition: params.h:121
Consensus::Params::BIP66Height
int BIP66Height
Block height at which BIP66 becomes active.
Definition: params.h:100
Consensus::Params::powLimit
uint256 powLimit
Proof of work parameters.
Definition: params.h:112
Consensus::Params::vDeployments
std::array< BIP9Deployment, MAX_VERSION_BITS_DEPLOYMENTS > vDeployments
Definition: params.h:110
Consensus::Params::nPowTargetSpacing
int64_t nPowTargetSpacing
Definition: params.h:120
Consensus::Params::fPowAllowMinDifficultyBlocks
bool fPowAllowMinDifficultyBlocks
Definition: params.h:113
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
assert
assert(!tx.IsCoinBase())
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