Bitcoin Core  22.99.0
P2P Digital Currency
chainparams.cpp
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1 // Copyright (c) 2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2021 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 <chainparams.h>
7 
8 #include <chainparamsseeds.h>
9 #include <consensus/merkle.h>
10 #include <deploymentinfo.h>
11 #include <hash.h> // for signet block challenge hash
12 #include <util/system.h>
13 
14 #include <assert.h>
15 
16 #include <boost/algorithm/string/classification.hpp>
17 #include <boost/algorithm/string/split.hpp>
18 
19 static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
20 {
21  CMutableTransaction txNew;
22  txNew.nVersion = 1;
23  txNew.vin.resize(1);
24  txNew.vout.resize(1);
25  txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
26  txNew.vout[0].nValue = genesisReward;
27  txNew.vout[0].scriptPubKey = genesisOutputScript;
28 
29  CBlock genesis;
30  genesis.nTime = nTime;
31  genesis.nBits = nBits;
32  genesis.nNonce = nNonce;
33  genesis.nVersion = nVersion;
34  genesis.vtx.push_back(MakeTransactionRef(std::move(txNew)));
35  genesis.hashPrevBlock.SetNull();
36  genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
37  return genesis;
38 }
39 
51 static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
52 {
53  const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
54  const CScript genesisOutputScript = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
55  return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
56 }
57 
61 class CMainParams : public CChainParams {
62 public:
63  CMainParams() {
64  strNetworkID = CBaseChainParams::MAIN;
65  consensus.signet_blocks = false;
66  consensus.signet_challenge.clear();
67  consensus.nSubsidyHalvingInterval = 210000;
68  consensus.BIP16Exception = uint256S("0x00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22");
69  consensus.BIP34Height = 227931;
70  consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
71  consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
72  consensus.BIP66Height = 363725; // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
73  consensus.CSVHeight = 419328; // 000000000000000004a1b34462cb8aeebd5799177f7a29cf28f2d1961716b5b5
74  consensus.SegwitHeight = 481824; // 0000000000000000001c8018d9cb3b742ef25114f27563e3fc4a1902167f9893
75  consensus.MinBIP9WarningHeight = 483840; // segwit activation height + miner confirmation window
76  consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
77  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
78  consensus.nPowTargetSpacing = 10 * 60;
79  consensus.fPowAllowMinDifficultyBlocks = false;
80  consensus.fPowNoRetargeting = false;
81  consensus.nRuleChangeActivationThreshold = 1815; // 90% of 2016
82  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
83  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
84  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
85  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
86  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
87 
88  // Deployment of Taproot (BIPs 340-342)
89  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
90  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1619222400; // April 24th, 2021
91  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
92  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 709632; // Approximately November 12th, 2021
93 
94  consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000001fa4663bbbe19f82de910280");
95  consensus.defaultAssumeValid = uint256S("0x00000000000000000008a89e854d57e5667df88f1cdef6fde2fbca1de5b639ad"); // 691719
96 
102  pchMessageStart[0] = 0xf9;
103  pchMessageStart[1] = 0xbe;
104  pchMessageStart[2] = 0xb4;
105  pchMessageStart[3] = 0xd9;
106  nDefaultPort = 8333;
107  nPruneAfterHeight = 100000;
108  m_assumed_blockchain_size = 420;
109  m_assumed_chain_state_size = 6;
110 
111  genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
112  consensus.hashGenesisBlock = genesis.GetHash();
113  assert(consensus.hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
114  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
115 
116  // Note that of those which support the service bits prefix, most only support a subset of
117  // possible options.
118  // This is fine at runtime as we'll fall back to using them as an addrfetch if they don't support the
119  // service bits we want, but we should get them updated to support all service bits wanted by any
120  // release ASAP to avoid it where possible.
121  vSeeds.emplace_back("seed.bitcoin.sipa.be."); // Pieter Wuille, only supports x1, x5, x9, and xd
122  vSeeds.emplace_back("dnsseed.bluematt.me."); // Matt Corallo, only supports x9
123  vSeeds.emplace_back("dnsseed.bitcoin.dashjr.org."); // Luke Dashjr
124  vSeeds.emplace_back("seed.bitcoinstats.com."); // Christian Decker, supports x1 - xf
125  vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch."); // Jonas Schnelli, only supports x1, x5, x9, and xd
126  vSeeds.emplace_back("seed.btc.petertodd.org."); // Peter Todd, only supports x1, x5, x9, and xd
127  vSeeds.emplace_back("seed.bitcoin.sprovoost.nl."); // Sjors Provoost
128  vSeeds.emplace_back("dnsseed.emzy.de."); // Stephan Oeste
129  vSeeds.emplace_back("seed.bitcoin.wiz.biz."); // Jason Maurice
130 
131  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
132  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
133  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,128);
134  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
135  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};
136 
137  bech32_hrp = "bc";
138 
139  vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_main), std::end(chainparams_seed_main));
140 
141  fDefaultConsistencyChecks = false;
142  fRequireStandard = true;
143  m_is_test_chain = false;
144  m_is_mockable_chain = false;
145 
146  checkpointData = {
147  {
148  { 11111, uint256S("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")},
149  { 33333, uint256S("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6")},
150  { 74000, uint256S("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20")},
151  {105000, uint256S("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97")},
152  {134444, uint256S("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe")},
153  {168000, uint256S("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763")},
154  {193000, uint256S("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317")},
155  {210000, uint256S("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e")},
156  {216116, uint256S("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e")},
157  {225430, uint256S("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932")},
158  {250000, uint256S("0x000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214")},
159  {279000, uint256S("0x0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40")},
160  {295000, uint256S("0x00000000000000004d9b4ef50f0f9d686fd69db2e03af35a100370c64632a983")},
161  }
162  };
163 
164  m_assumeutxo_data = MapAssumeutxo{
165  // TODO to be specified in a future patch.
166  };
167 
168  chainTxData = ChainTxData{
169  // Data from RPC: getchaintxstats 4096 00000000000000000008a89e854d57e5667df88f1cdef6fde2fbca1de5b639ad
170  /* nTime */ 1626697539,
171  /* nTxCount */ 656509474,
172  /* dTxRate */ 2.424920418708139,
173  };
174  }
175 };
176 
180 class CTestNetParams : public CChainParams {
181 public:
182  CTestNetParams() {
183  strNetworkID = CBaseChainParams::TESTNET;
184  consensus.signet_blocks = false;
185  consensus.signet_challenge.clear();
186  consensus.nSubsidyHalvingInterval = 210000;
187  consensus.BIP16Exception = uint256S("0x00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105");
188  consensus.BIP34Height = 21111;
189  consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
190  consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
191  consensus.BIP66Height = 330776; // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
192  consensus.CSVHeight = 770112; // 00000000025e930139bac5c6c31a403776da130831ab85be56578f3fa75369bb
193  consensus.SegwitHeight = 834624; // 00000000002b980fcd729daaa248fd9316a5200e9b367f4ff2c42453e84201ca
194  consensus.MinBIP9WarningHeight = 836640; // segwit activation height + miner confirmation window
195  consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
196  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
197  consensus.nPowTargetSpacing = 10 * 60;
198  consensus.fPowAllowMinDifficultyBlocks = true;
199  consensus.fPowNoRetargeting = false;
200  consensus.nRuleChangeActivationThreshold = 1512; // 75% for testchains
201  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
202  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
203  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
204  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
205  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
206 
207  // Deployment of Taproot (BIPs 340-342)
208  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
209  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = 1619222400; // April 24th, 2021
210  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
211  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
212 
213  consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000005180c3bd8290da33a1a");
214  consensus.defaultAssumeValid = uint256S("0x0000000000004ae2f3896ca8ecd41c460a35bf6184e145d91558cece1c688a76"); // 2010000
215 
216  pchMessageStart[0] = 0x0b;
217  pchMessageStart[1] = 0x11;
218  pchMessageStart[2] = 0x09;
219  pchMessageStart[3] = 0x07;
220  nDefaultPort = 18333;
221  nPruneAfterHeight = 1000;
222  m_assumed_blockchain_size = 40;
223  m_assumed_chain_state_size = 2;
224 
225  genesis = CreateGenesisBlock(1296688602, 414098458, 0x1d00ffff, 1, 50 * COIN);
226  consensus.hashGenesisBlock = genesis.GetHash();
227  assert(consensus.hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
228  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
229 
230  vFixedSeeds.clear();
231  vSeeds.clear();
232  // nodes with support for servicebits filtering should be at the top
233  vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch.");
234  vSeeds.emplace_back("seed.tbtc.petertodd.org.");
235  vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl.");
236  vSeeds.emplace_back("testnet-seed.bluematt.me."); // Just a static list of stable node(s), only supports x9
237 
238  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
239  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
240  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
241  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
242  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
243 
244  bech32_hrp = "tb";
245 
246  vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_test), std::end(chainparams_seed_test));
247 
248  fDefaultConsistencyChecks = false;
249  fRequireStandard = false;
250  m_is_test_chain = true;
251  m_is_mockable_chain = false;
252 
253  checkpointData = {
254  {
255  {546, uint256S("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70")},
256  }
257  };
258 
259  m_assumeutxo_data = MapAssumeutxo{
260  // TODO to be specified in a future patch.
261  };
262 
263  chainTxData = ChainTxData{
264  // Data from RPC: getchaintxstats 4096 0000000000004ae2f3896ca8ecd41c460a35bf6184e145d91558cece1c688a76
265  /* nTime */ 1625727096,
266  /* nTxCount */ 60408943,
267  /* dTxRate */ 0.08379062270367649,
268  };
269  }
270 };
271 
275 class SigNetParams : public CChainParams {
276 public:
277  explicit SigNetParams(const ArgsManager& args) {
278  std::vector<uint8_t> bin;
279  vSeeds.clear();
280 
281  if (!args.IsArgSet("-signetchallenge")) {
282  bin = ParseHex("512103ad5e0edad18cb1f0fc0d28a3d4f1f3e445640337489abb10404f2d1e086be430210359ef5021964fe22d6f8e05b2463c9540ce96883fe3b278760f048f5189f2e6c452ae");
283  vSeeds.emplace_back("seed.signet.bitcoin.sprovoost.nl.");
284 
285  // Hardcoded nodes can be removed once there are more DNS seeds
286  vSeeds.emplace_back("178.128.221.177");
287  vSeeds.emplace_back("v7ajjeirttkbnt32wpy3c6w3emwnfr3fkla7hpxcfokr3ysd3kqtzmqd.onion:38333");
288 
289  consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000000008546553c03");
290  consensus.defaultAssumeValid = uint256S("0x000000187d4440e5bff91488b700a140441e089a8aaea707414982460edbfe54"); // 47200
291  m_assumed_blockchain_size = 1;
292  m_assumed_chain_state_size = 0;
293  chainTxData = ChainTxData{
294  // Data from RPC: getchaintxstats 4096 000000187d4440e5bff91488b700a140441e089a8aaea707414982460edbfe54
295  /* nTime */ 1626696658,
296  /* nTxCount */ 387761,
297  /* dTxRate */ 0.04035946932424404,
298  };
299  } else {
300  const auto signet_challenge = args.GetArgs("-signetchallenge");
301  if (signet_challenge.size() != 1) {
302  throw std::runtime_error(strprintf("%s: -signetchallenge cannot be multiple values.", __func__));
303  }
304  bin = ParseHex(signet_challenge[0]);
305 
306  consensus.nMinimumChainWork = uint256{};
307  consensus.defaultAssumeValid = uint256{};
308  m_assumed_blockchain_size = 0;
309  m_assumed_chain_state_size = 0;
310  chainTxData = ChainTxData{
311  0,
312  0,
313  0,
314  };
315  LogPrintf("Signet with challenge %s\n", signet_challenge[0]);
316  }
317 
318  if (args.IsArgSet("-signetseednode")) {
319  vSeeds = args.GetArgs("-signetseednode");
320  }
321 
322  strNetworkID = CBaseChainParams::SIGNET;
323  consensus.signet_blocks = true;
324  consensus.signet_challenge.assign(bin.begin(), bin.end());
325  consensus.nSubsidyHalvingInterval = 210000;
326  consensus.BIP16Exception = uint256{};
327  consensus.BIP34Height = 1;
328  consensus.BIP34Hash = uint256{};
329  consensus.BIP65Height = 1;
330  consensus.BIP66Height = 1;
331  consensus.CSVHeight = 1;
332  consensus.SegwitHeight = 1;
333  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
334  consensus.nPowTargetSpacing = 10 * 60;
335  consensus.fPowAllowMinDifficultyBlocks = false;
336  consensus.fPowNoRetargeting = false;
337  consensus.nRuleChangeActivationThreshold = 1815; // 90% of 2016
338  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
339  consensus.MinBIP9WarningHeight = 0;
340  consensus.powLimit = uint256S("00000377ae000000000000000000000000000000000000000000000000000000");
341  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
342  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::NEVER_ACTIVE;
343  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
344  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
345 
346  // Activation of Taproot (BIPs 340-342)
347  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
348  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
349  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
350  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
351 
352  // message start is defined as the first 4 bytes of the sha256d of the block script
353  CHashWriter h(SER_DISK, 0);
354  h << consensus.signet_challenge;
355  uint256 hash = h.GetHash();
356  memcpy(pchMessageStart, hash.begin(), 4);
357 
358  nDefaultPort = 38333;
359  nPruneAfterHeight = 1000;
360 
361  genesis = CreateGenesisBlock(1598918400, 52613770, 0x1e0377ae, 1, 50 * COIN);
362  consensus.hashGenesisBlock = genesis.GetHash();
363  assert(consensus.hashGenesisBlock == uint256S("0x00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6"));
364  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
365 
366  vFixedSeeds.clear();
367 
368  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
369  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
370  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
371  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
372  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
373 
374  bech32_hrp = "tb";
375 
376  fDefaultConsistencyChecks = false;
377  fRequireStandard = true;
378  m_is_test_chain = true;
379  m_is_mockable_chain = false;
380  }
381 };
382 
387 class CRegTestParams : public CChainParams {
388 public:
389  explicit CRegTestParams(const ArgsManager& args) {
390  strNetworkID = CBaseChainParams::REGTEST;
391  consensus.signet_blocks = false;
392  consensus.signet_challenge.clear();
393  consensus.nSubsidyHalvingInterval = 150;
394  consensus.BIP16Exception = uint256();
395  consensus.BIP34Height = 1; // Always active unless overridden
396  consensus.BIP34Hash = uint256();
397  consensus.BIP65Height = 1; // Always active unless overridden
398  consensus.BIP66Height = 1; // Always active unless overridden
399  consensus.CSVHeight = 1; // Always active unless overridden
400  consensus.SegwitHeight = 1; // Always active unless overridden
401  consensus.MinBIP9WarningHeight = 0;
402  consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
403  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
404  consensus.nPowTargetSpacing = 10 * 60;
405  consensus.fPowAllowMinDifficultyBlocks = true;
406  consensus.fPowNoRetargeting = true;
407  consensus.nRuleChangeActivationThreshold = 108; // 75% for testchains
408  consensus.nMinerConfirmationWindow = 144; // Faster than normal for regtest (144 instead of 2016)
409 
410  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
411  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
412  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
413  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].min_activation_height = 0; // No activation delay
414 
415  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].bit = 2;
416  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
417  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
418  consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
419 
420  consensus.nMinimumChainWork = uint256{};
421  consensus.defaultAssumeValid = uint256{};
422 
423  pchMessageStart[0] = 0xfa;
424  pchMessageStart[1] = 0xbf;
425  pchMessageStart[2] = 0xb5;
426  pchMessageStart[3] = 0xda;
427  nDefaultPort = 18444;
428  nPruneAfterHeight = args.GetBoolArg("-fastprune", false) ? 100 : 1000;
429  m_assumed_blockchain_size = 0;
430  m_assumed_chain_state_size = 0;
431 
432  UpdateActivationParametersFromArgs(args);
433 
434  genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 50 * COIN);
435  consensus.hashGenesisBlock = genesis.GetHash();
436  assert(consensus.hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
437  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
438 
439  vFixedSeeds.clear();
440  vSeeds.clear();
441  vSeeds.emplace_back("dummySeed.invalid.");
442 
443  fDefaultConsistencyChecks = true;
444  fRequireStandard = true;
445  m_is_test_chain = true;
446  m_is_mockable_chain = true;
447 
448  checkpointData = {
449  {
450  {0, uint256S("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206")},
451  }
452  };
453 
454  m_assumeutxo_data = MapAssumeutxo{
455  {
456  110,
457  {AssumeutxoHash{uint256S("0x1ebbf5850204c0bdb15bf030f47c7fe91d45c44c712697e4509ba67adb01c618")}, 110},
458  },
459  {
460  200,
461  {AssumeutxoHash{uint256S("0x51c8d11d8b5c1de51543c579736e786aa2736206d1e11e627568029ce092cf62")}, 200},
462  },
463  };
464 
465  chainTxData = ChainTxData{
466  0,
467  0,
468  0
469  };
470 
471  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
472  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
473  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
474  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
475  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
476 
477  bech32_hrp = "bcrt";
478  }
479 
483  void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int min_activation_height)
484  {
485  consensus.vDeployments[d].nStartTime = nStartTime;
486  consensus.vDeployments[d].nTimeout = nTimeout;
487  consensus.vDeployments[d].min_activation_height = min_activation_height;
488  }
489  void UpdateActivationParametersFromArgs(const ArgsManager& args);
490 };
491 
492 static void MaybeUpdateHeights(const ArgsManager& args, Consensus::Params& consensus)
493 {
494  for (const std::string& arg : args.GetArgs("-testactivationheight")) {
495  const auto found{arg.find('@')};
496  if (found == std::string::npos) {
497  throw std::runtime_error(strprintf("Invalid format (%s) for -testactivationheight=name@height.", arg));
498  }
499  const auto name{arg.substr(0, found)};
500  const auto value{arg.substr(found + 1)};
501  int32_t height;
502  if (!ParseInt32(value, &height) || height < 0 || height >= std::numeric_limits<int>::max()) {
503  throw std::runtime_error(strprintf("Invalid height value (%s) for -testactivationheight=name@height.", arg));
504  }
505  if (name == "segwit") {
506  consensus.SegwitHeight = int{height};
507  } else if (name == "bip34") {
508  consensus.BIP34Height = int{height};
509  } else if (name == "dersig") {
510  consensus.BIP66Height = int{height};
511  } else if (name == "cltv") {
512  consensus.BIP65Height = int{height};
513  } else if (name == "csv") {
514  consensus.CSVHeight = int{height};
515  } else {
516  throw std::runtime_error(strprintf("Invalid name (%s) for -testactivationheight=name@height.", arg));
517  }
518  }
519 }
520 
521 void CRegTestParams::UpdateActivationParametersFromArgs(const ArgsManager& args)
522 {
523  MaybeUpdateHeights(args, consensus);
524 
525  if (!args.IsArgSet("-vbparams")) return;
526 
527  for (const std::string& strDeployment : args.GetArgs("-vbparams")) {
528  std::vector<std::string> vDeploymentParams;
529  boost::split(vDeploymentParams, strDeployment, boost::is_any_of(":"));
530  if (vDeploymentParams.size() < 3 || 4 < vDeploymentParams.size()) {
531  throw std::runtime_error("Version bits parameters malformed, expecting deployment:start:end[:min_activation_height]");
532  }
533  int64_t nStartTime, nTimeout;
534  int min_activation_height = 0;
535  if (!ParseInt64(vDeploymentParams[1], &nStartTime)) {
536  throw std::runtime_error(strprintf("Invalid nStartTime (%s)", vDeploymentParams[1]));
537  }
538  if (!ParseInt64(vDeploymentParams[2], &nTimeout)) {
539  throw std::runtime_error(strprintf("Invalid nTimeout (%s)", vDeploymentParams[2]));
540  }
541  if (vDeploymentParams.size() >= 4 && !ParseInt32(vDeploymentParams[3], &min_activation_height)) {
542  throw std::runtime_error(strprintf("Invalid min_activation_height (%s)", vDeploymentParams[3]));
543  }
544  bool found = false;
545  for (int j=0; j < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j) {
546  if (vDeploymentParams[0] == VersionBitsDeploymentInfo[j].name) {
547  UpdateVersionBitsParameters(Consensus::DeploymentPos(j), nStartTime, nTimeout, min_activation_height);
548  found = true;
549  LogPrintf("Setting version bits activation parameters for %s to start=%ld, timeout=%ld, min_activation_height=%d\n", vDeploymentParams[0], nStartTime, nTimeout, min_activation_height);
550  break;
551  }
552  }
553  if (!found) {
554  throw std::runtime_error(strprintf("Invalid deployment (%s)", vDeploymentParams[0]));
555  }
556  }
557 }
558 
559 static std::unique_ptr<const CChainParams> globalChainParams;
560 
561 const CChainParams &Params() {
562  assert(globalChainParams);
563  return *globalChainParams;
564 }
565 
566 std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const std::string& chain)
567 {
568  if (chain == CBaseChainParams::MAIN) {
569  return std::unique_ptr<CChainParams>(new CMainParams());
570  } else if (chain == CBaseChainParams::TESTNET) {
571  return std::unique_ptr<CChainParams>(new CTestNetParams());
572  } else if (chain == CBaseChainParams::SIGNET) {
573  return std::unique_ptr<CChainParams>(new SigNetParams(args));
574  } else if (chain == CBaseChainParams::REGTEST) {
575  return std::unique_ptr<CChainParams>(new CRegTestParams(args));
576  }
577  throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
578 }
579 
580 void SelectParams(const std::string& network)
581 {
582  SelectBaseParams(network);
583  globalChainParams = CreateChainParams(gArgs, network);
584 }
Consensus::BIP9Deployment::nStartTime
int64_t nStartTime
Start MedianTime for version bits miner confirmation.
Definition: params.h:43
CRegTestParams::UpdateVersionBitsParameters
void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout, int min_activation_height)
Allows modifying the Version Bits regtest parameters.
Definition: chainparams.cpp:483
CChainParams::m_assumed_blockchain_size
uint64_t m_assumed_blockchain_size
Definition: chainparams.h:132
CMutableTransaction::vin
std::vector< CTxIn > vin
Definition: transaction.h:346
ParseInt64
bool ParseInt64(const std::string &str, int64_t *out)
Convert string to signed 64-bit integer with strict parse error feedback.
Definition: strencodings.cpp:304
ArgsManager::GetBoolArg
bool GetBoolArg(const std::string &strArg, bool fDefault) const
Return boolean argument or default value.
Definition: system.cpp:602
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:19
ParseHex
std::vector< unsigned char > ParseHex(const char *psz)
Definition: strencodings.cpp:84
CChainParams::EXT_PUBLIC_KEY
@ EXT_PUBLIC_KEY
Definition: chainparams.h:76
assert
assert(!tx.IsCoinBase())
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
SER_DISK
@ SER_DISK
Definition: serialize.h:139
Consensus::BIP9Deployment::bit
int bit
Bit position to select the particular bit in nVersion.
Definition: params.h:41
AssumeutxoHash
Definition: chainparams.h:31
CBlockHeader::hashMerkleRoot
uint256 hashMerkleRoot
Definition: block.h:26
CChainParams::strNetworkID
std::string strNetworkID
Definition: chainparams.h:137
chainparams_seed_test
static const uint8_t chainparams_seed_test[]
Definition: chainparamsseeds.h:704
Consensus::MAX_VERSION_BITS_DEPLOYMENTS
@ MAX_VERSION_BITS_DEPLOYMENTS
Definition: params.h:32
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int nSubsidyHalvingInterval
Definition: params.h:72
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Definition: block.h:28
CChainParams::chainTxData
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Definition: chainparams.h:146
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uint64_t m_assumed_chain_state_size
Definition: chainparams.h:133
MaybeUpdateHeights
static void MaybeUpdateHeights(const ArgsManager &args, Consensus::Params &consensus)
Definition: chainparams.cpp:492
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int32_t nVersion
Definition: block.h:24
CChainParams::fRequireStandard
bool fRequireStandard
Definition: chainparams.h:141
CMutableTransaction::nVersion
int32_t nVersion
Definition: transaction.h:348
Consensus::BIP9Deployment::nTimeout
int64_t nTimeout
Timeout/expiry MedianTime for the deployment attempt.
Definition: params.h:45
ArgsManager::IsArgSet
bool IsArgSet(const std::string &strArg) const
Return true if the given argument has been manually set.
Definition: system.cpp:496
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Definition: chainparams.h:136
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CTestNetParams()
Definition: chainparams.cpp:182
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static const std::string TESTNET
Definition: chainparamsbase.h:23
CChainParams
CChainParams defines various tweakable parameters of a given instance of the Bitcoin system.
Definition: chainparams.h:69
SelectBaseParams
void SelectBaseParams(const std::string &chain)
Sets the params returned by Params() to those for the given network.
Definition: chainparamsbase.cpp:57
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Definition: uint256.h:39
Consensus::BIP9Deployment::NO_TIMEOUT
static constexpr int64_t NO_TIMEOUT
Constant for nTimeout very far in the future.
Definition: params.h:53
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Definition: chainparams.h:134
MakeTransactionRef
static CTransactionRef MakeTransactionRef(Tx &&txIn)
Definition: transaction.h:387
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Definition: chainparams.h:142
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Definition: params.h:97
SigNetParams
Signet: test network with an additional consensus parameter (see BIP325).
Definition: chainparams.cpp:275
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By default assume that the signatures in ancestors of this block are valid.
Definition: params.h:109
VersionBitsDeploymentInfo
const struct VBDeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION_BITS_DEPLOYMENTS]
Definition: deploymentinfo.cpp:9
chainparams.h
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CMessageHeader::MessageStartChars pchMessageStart
Definition: chainparams.h:129
Consensus::Params::nRuleChangeActivationThreshold
uint32_t nRuleChangeActivationThreshold
Minimum blocks including miner confirmation of the total of 2016 blocks in a retargeting period,...
Definition: params.h:96
CRegTestParams::UpdateActivationParametersFromArgs
void UpdateActivationParametersFromArgs(const ArgsManager &args)
Definition: chainparams.cpp:521
CMainParams::CMainParams
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Definition: chainparams.cpp:63
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uint256 GetHash() const
Definition: block.cpp:11
CChainParams::fDefaultConsistencyChecks
bool fDefaultConsistencyChecks
Definition: chainparams.h:140
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Definition: chainparams.h:143
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Definition: params.h:103
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CBlock genesis
Definition: chainparams.h:138
CScriptNum
Definition: script.h:219
chainparamsseeds.h
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uint32_t nNonce
Definition: block.h:29
Consensus::Params
Parameters that influence chain consensus.
Definition: params.h:70
Consensus::Params::SegwitHeight
int SegwitHeight
Block height at which Segwit (BIP141, BIP143 and BIP147) becomes active.
Definition: params.h:87
Consensus::DeploymentPos
DeploymentPos
Definition: params.h:28
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uint16_t nDefaultPort
Definition: chainparams.h:130
CChainParams::SECRET_KEY
@ SECRET_KEY
Definition: chainparams.h:75
deploymentinfo.h
ChainTxData
Holds various statistics on transactions within a chain.
Definition: chainparams.h:59
Consensus::Params::fPowAllowMinDifficultyBlocks
bool fPowAllowMinDifficultyBlocks
Definition: params.h:101
CBaseChainParams::REGTEST
static const std::string REGTEST
Definition: chainparamsbase.h:25
LogPrintf
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Definition: logging.h:187
CAmount
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Amount in satoshis (Can be negative)
Definition: amount.h:12
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Definition: params.h:116
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static constexpr int64_t NEVER_ACTIVE
Special value for nStartTime indicating that the deployment is never active.
Definition: params.h:64
SelectParams
void SelectParams(const std::string &network)
Sets the params returned by Params() to those for the given chain name.
Definition: chainparams.cpp:580
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Definition: block.h:27
Consensus::DEPLOYMENT_TAPROOT
@ DEPLOYMENT_TAPROOT
Definition: params.h:30
uint256
256-bit opaque blob.
Definition: uint256.h:124
uint256S
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Definition: uint256.h:137
Consensus::Params::powLimit
uint256 powLimit
Proof of work parameters.
Definition: params.h:100
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Definition: chainparams.h:144
CScript
Serialized script, used inside transaction inputs and outputs.
Definition: script.h:405
globalChainParams
static std::unique_ptr< const CChainParams > globalChainParams
Definition: chainparams.cpp:559
Consensus::DEPLOYMENT_TESTDUMMY
@ DEPLOYMENT_TESTDUMMY
Definition: params.h:29
gArgs
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Definition: system.cpp:85
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Definition: params.h:77
merkle.h
CBaseChainParams::MAIN
static const std::string MAIN
Chain name strings.
Definition: chainparamsbase.h:22
CRegTestParams
Regression test: intended for private networks only.
Definition: chainparams.cpp:387
SigNetParams::SigNetParams
SigNetParams(const ArgsManager &args)
Definition: chainparams.cpp:277
CMainParams
Main network on which people trade goods and services.
Definition: chainparams.cpp:61
name
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Definition: rest.cpp:52
Consensus::Params::fPowNoRetargeting
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Definition: params.h:102
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Definition: block.h:25
Consensus::Params::nPowTargetTimespan
int64_t nPowTargetTimespan
Definition: params.h:104
Consensus::BIP9Deployment::min_activation_height
int min_activation_height
If lock in occurs, delay activation until at least this block height.
Definition: params.h:50
CChainParams::base58Prefixes
std::vector< unsigned char > base58Prefixes[MAX_BASE58_TYPES]
Definition: chainparams.h:135
CRegTestParams::CRegTestParams
CRegTestParams(const ArgsManager &args)
Definition: chainparams.cpp:389
system.h
CBlock
Definition: block.h:62
CMutableTransaction::vout
std::vector< CTxOut > vout
Definition: transaction.h:347
Consensus::Params::BIP34Height
int BIP34Height
Block height and hash at which BIP34 becomes active.
Definition: params.h:76
strprintf
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Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for...
Definition: tinyformat.h:1164
Consensus::Params::BIP66Height
int BIP66Height
Block height at which BIP66 becomes active.
Definition: params.h:81
ParseInt32
bool ParseInt32(const std::string &str, int32_t *out)
Convert string to signed 32-bit integer with strict parse error feedback.
Definition: strencodings.cpp:299
CChainParams::EXT_SECRET_KEY
@ EXT_SECRET_KEY
Definition: chainparams.h:77
CBlock::vtx
std::vector< CTransactionRef > vtx
Definition: block.h:66
Consensus::Params::hashGenesisBlock
uint256 hashGenesisBlock
Definition: params.h:71
Consensus::Params::vDeployments
BIP9Deployment vDeployments[MAX_VERSION_BITS_DEPLOYMENTS]
Definition: params.h:98
ArgsManager
Definition: system.h:158
CHashWriter
A writer stream (for serialization) that computes a 256-bit hash.
Definition: hash.h:100
Params
const CChainParams & Params()
Return the currently selected parameters.
Definition: chainparams.cpp:561
CChainParams::PUBKEY_ADDRESS
@ PUBKEY_ADDRESS
Definition: chainparams.h:73
hash.h
CChainParams::vFixedSeeds
std::vector< uint8_t > vFixedSeeds
Definition: chainparams.h:139
Consensus::Params::BIP65Height
int BIP65Height
Block height at which BIP65 becomes active.
Definition: params.h:79
CChainParams::consensus
Consensus::Params consensus
Definition: chainparams.h:128
Consensus::Params::nMinimumChainWork
uint256 nMinimumChainWork
The best chain should have at least this much work.
Definition: params.h:107
Consensus::Params::CSVHeight
int CSVHeight
Block height at which CSV (BIP68, BIP112 and BIP113) becomes active.
Definition: params.h:83
ArgsManager::GetArgs
std::vector< std::string > GetArgs(const std::string &strArg) const
Return a vector of strings of the given argument.
Definition: system.cpp:487
Consensus::Params::BIP16Exception
uint256 BIP16Exception
Definition: params.h:74
COIN
static constexpr CAmount COIN
The amount of satoshis in one BTC.
Definition: amount.h:15
CMutableTransaction
A mutable version of CTransaction.
Definition: transaction.h:344
CHashWriter::GetHash
uint256 GetHash()
Compute the double-SHA256 hash of all data written to this object.
Definition: hash.h:122
OP_CHECKSIG
@ OP_CHECKSIG
Definition: script.h:183
CChainParams::nPruneAfterHeight
uint64_t nPruneAfterHeight
Definition: chainparams.h:131
CTestNetParams
Testnet (v3): public test network which is reset from time to time.
Definition: chainparams.cpp:180
CreateChainParams
std::unique_ptr< const CChainParams > CreateChainParams(const ArgsManager &args, const std::string &chain)
Creates and returns a std::unique_ptr<CChainParams> of the chosen chain.
Definition: chainparams.cpp:566
CChainParams::SCRIPT_ADDRESS
@ SCRIPT_ADDRESS
Definition: chainparams.h:74
base_blob::begin
unsigned char * begin()
Definition: uint256.h:58
MapAssumeutxo
std::map< int, const AssumeutxoData > MapAssumeutxo
Definition: chainparams.h:51
CBaseChainParams::SIGNET
static const std::string SIGNET
Definition: chainparamsbase.h:24
CChainParams::m_assumeutxo_data
MapAssumeutxo m_assumeutxo_data
Definition: chainparams.h:145
Consensus::Params::MinBIP9WarningHeight
int MinBIP9WarningHeight
Don't warn about unknown BIP 9 activations below this height.
Definition: params.h:90
BlockMerkleRoot
uint256 BlockMerkleRoot(const CBlock &block, bool *mutated)
Definition: merkle.cpp:65
args
ArgsManager args
Definition: notifications.cpp:36
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:115
Consensus::BIP9Deployment::ALWAYS_ACTIVE
static constexpr int64_t ALWAYS_ACTIVE
Special value for nStartTime indicating that the deployment is always active.
Definition: params.h:59
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