Bitcoin Core  0.20.99
P2P Digital Currency
chainparams.cpp
Go to the documentation of this file.
1 // Copyright (c) 2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2020 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 <tinyformat.h>
11 #include <util/system.h>
12 #include <util/strencodings.h>
13 #include <versionbitsinfo.h>
14 
15 #include <assert.h>
16 
17 #include <boost/algorithm/string/classification.hpp>
18 #include <boost/algorithm/string/split.hpp>
19 
20 static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
21 {
22  CMutableTransaction txNew;
23  txNew.nVersion = 1;
24  txNew.vin.resize(1);
25  txNew.vout.resize(1);
26  txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
27  txNew.vout[0].nValue = genesisReward;
28  txNew.vout[0].scriptPubKey = genesisOutputScript;
29 
30  CBlock genesis;
31  genesis.nTime = nTime;
32  genesis.nBits = nBits;
33  genesis.nNonce = nNonce;
34  genesis.nVersion = nVersion;
35  genesis.vtx.push_back(MakeTransactionRef(std::move(txNew)));
36  genesis.hashPrevBlock.SetNull();
37  genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
38  return genesis;
39 }
40 
52 static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
53 {
54  const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
55  const CScript genesisOutputScript = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
56  return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
57 }
58 
62 class CMainParams : public CChainParams {
63 public:
67  consensus.BIP16Exception = uint256S("0x00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22");
68  consensus.BIP34Height = 227931;
69  consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
70  consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
71  consensus.BIP66Height = 363725; // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
72  consensus.CSVHeight = 419328; // 000000000000000004a1b34462cb8aeebd5799177f7a29cf28f2d1961716b5b5
73  consensus.SegwitHeight = 481824; // 0000000000000000001c8018d9cb3b742ef25114f27563e3fc4a1902167f9893
74  consensus.MinBIP9WarningHeight = 483840; // segwit activation height + miner confirmation window
75  consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
76  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
77  consensus.nPowTargetSpacing = 10 * 60;
80  consensus.nRuleChangeActivationThreshold = 1916; // 95% of 2016
81  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
83  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
84  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
85 
86  // The best chain should have at least this much work.
87  consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000e1ab5ec9348e9f4b8eb8154");
88 
89  // By default assume that the signatures in ancestors of this block are valid.
90  consensus.defaultAssumeValid = uint256S("0x0000000000000000000f2adce67e49b0b6bdeb9de8b7c3d7e93b21e7fc1e819d"); // 623950
91 
97  pchMessageStart[0] = 0xf9;
98  pchMessageStart[1] = 0xbe;
99  pchMessageStart[2] = 0xb4;
100  pchMessageStart[3] = 0xd9;
101  nDefaultPort = 8333;
102  nPruneAfterHeight = 100000;
105 
106  genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
108  assert(consensus.hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
109  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
110 
111  // Note that of those which support the service bits prefix, most only support a subset of
112  // possible options.
113  // This is fine at runtime as we'll fall back to using them as a oneshot if they don't support the
114  // service bits we want, but we should get them updated to support all service bits wanted by any
115  // release ASAP to avoid it where possible.
116  vSeeds.emplace_back("seed.bitcoin.sipa.be"); // Pieter Wuille, only supports x1, x5, x9, and xd
117  vSeeds.emplace_back("dnsseed.bluematt.me"); // Matt Corallo, only supports x9
118  vSeeds.emplace_back("dnsseed.bitcoin.dashjr.org"); // Luke Dashjr
119  vSeeds.emplace_back("seed.bitcoinstats.com"); // Christian Decker, supports x1 - xf
120  vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch"); // Jonas Schnelli, only supports x1, x5, x9, and xd
121  vSeeds.emplace_back("seed.btc.petertodd.org"); // Peter Todd, only supports x1, x5, x9, and xd
122  vSeeds.emplace_back("seed.bitcoin.sprovoost.nl"); // Sjors Provoost
123  vSeeds.emplace_back("dnsseed.emzy.de"); // Stephan Oeste
124  vSeeds.emplace_back("seed.bitcoin.wiz.biz"); // Jason Maurice
125 
126  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
127  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
128  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,128);
129  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
130  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};
131 
132  bech32_hrp = "bc";
133 
134  vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));
135 
137  fRequireStandard = true;
138  m_is_test_chain = false;
139  m_is_mockable_chain = false;
140 
141  checkpointData = {
142  {
143  { 11111, uint256S("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")},
144  { 33333, uint256S("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6")},
145  { 74000, uint256S("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20")},
146  {105000, uint256S("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97")},
147  {134444, uint256S("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe")},
148  {168000, uint256S("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763")},
149  {193000, uint256S("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317")},
150  {210000, uint256S("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e")},
151  {216116, uint256S("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e")},
152  {225430, uint256S("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932")},
153  {250000, uint256S("0x000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214")},
154  {279000, uint256S("0x0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40")},
155  {295000, uint256S("0x00000000000000004d9b4ef50f0f9d686fd69db2e03af35a100370c64632a983")},
156  }
157  };
158 
160  // Data from RPC: getchaintxstats 4096 0000000000000000000f2adce67e49b0b6bdeb9de8b7c3d7e93b21e7fc1e819d
161  /* nTime */ 1585764811,
162  /* nTxCount */ 517186863,
163  /* dTxRate */ 3.305709665792344,
164  };
165  }
166 };
167 
171 class CTestNetParams : public CChainParams {
172 public:
176  consensus.BIP16Exception = uint256S("0x00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105");
177  consensus.BIP34Height = 21111;
178  consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
179  consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
180  consensus.BIP66Height = 330776; // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
181  consensus.CSVHeight = 770112; // 00000000025e930139bac5c6c31a403776da130831ab85be56578f3fa75369bb
182  consensus.SegwitHeight = 834624; // 00000000002b980fcd729daaa248fd9316a5200e9b367f4ff2c42453e84201ca
183  consensus.MinBIP9WarningHeight = 836640; // segwit activation height + miner confirmation window
184  consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
185  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
186  consensus.nPowTargetSpacing = 10 * 60;
189  consensus.nRuleChangeActivationThreshold = 1512; // 75% for testchains
190  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
192  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
193  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
194 
195  // The best chain should have at least this much work.
196  consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000001495c1d5a01e2af8a23");
197 
198  // By default assume that the signatures in ancestors of this block are valid.
199  consensus.defaultAssumeValid = uint256S("0x000000000000056c49030c174179b52a928c870e6e8a822c75973b7970cfbd01"); // 1692000
200 
201  pchMessageStart[0] = 0x0b;
202  pchMessageStart[1] = 0x11;
203  pchMessageStart[2] = 0x09;
204  pchMessageStart[3] = 0x07;
205  nDefaultPort = 18333;
206  nPruneAfterHeight = 1000;
209 
210  genesis = CreateGenesisBlock(1296688602, 414098458, 0x1d00ffff, 1, 50 * COIN);
212  assert(consensus.hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
213  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
214 
215  vFixedSeeds.clear();
216  vSeeds.clear();
217  // nodes with support for servicebits filtering should be at the top
218  vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch");
219  vSeeds.emplace_back("seed.tbtc.petertodd.org");
220  vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl");
221  vSeeds.emplace_back("testnet-seed.bluematt.me"); // Just a static list of stable node(s), only supports x9
222 
223  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
224  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
225  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
226  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
227  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
228 
229  bech32_hrp = "tb";
230 
231  vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));
232 
234  fRequireStandard = false;
235  m_is_test_chain = true;
236  m_is_mockable_chain = false;
237 
238  checkpointData = {
239  {
240  {546, uint256S("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70")},
241  }
242  };
243 
245  // Data from RPC: getchaintxstats 4096 000000000000056c49030c174179b52a928c870e6e8a822c75973b7970cfbd01
246  /* nTime */ 1585561140,
247  /* nTxCount */ 13483,
248  /* dTxRate */ 0.08523187013249722,
249  };
250  }
251 };
252 
256 class CRegTestParams : public CChainParams {
257 public:
258  explicit CRegTestParams(const ArgsManager& args) {
262  consensus.BIP34Height = 500; // BIP34 activated on regtest (Used in functional tests)
264  consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in functional tests)
265  consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in functional tests)
266  consensus.CSVHeight = 432; // CSV activated on regtest (Used in rpc activation tests)
267  consensus.SegwitHeight = 0; // SEGWIT is always activated on regtest unless overridden
269  consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
270  consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
271  consensus.nPowTargetSpacing = 10 * 60;
274  consensus.nRuleChangeActivationThreshold = 108; // 75% for testchains
275  consensus.nMinerConfirmationWindow = 144; // Faster than normal for regtest (144 instead of 2016)
279 
280  // The best chain should have at least this much work.
282 
283  // By default assume that the signatures in ancestors of this block are valid.
285 
286  pchMessageStart[0] = 0xfa;
287  pchMessageStart[1] = 0xbf;
288  pchMessageStart[2] = 0xb5;
289  pchMessageStart[3] = 0xda;
290  nDefaultPort = 18444;
291  nPruneAfterHeight = 1000;
294 
295  UpdateActivationParametersFromArgs(args);
296 
297  genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff, 1, 50 * COIN);
299  assert(consensus.hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
300  assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
301 
302  vFixedSeeds.clear();
303  vSeeds.clear();
304 
306  fRequireStandard = true;
307  m_is_test_chain = true;
308  m_is_mockable_chain = true;
309 
310  checkpointData = {
311  {
312  {0, uint256S("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206")},
313  }
314  };
315 
317  0,
318  0,
319  0
320  };
321 
322  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
323  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
324  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
325  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
326  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
327 
328  bech32_hrp = "bcrt";
329  }
330 
334  void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
335  {
336  consensus.vDeployments[d].nStartTime = nStartTime;
337  consensus.vDeployments[d].nTimeout = nTimeout;
338  }
339  void UpdateActivationParametersFromArgs(const ArgsManager& args);
340 };
341 
343 {
344  if (args.IsArgSet("-segwitheight")) {
345  int64_t height = args.GetArg("-segwitheight", consensus.SegwitHeight);
346  if (height < -1 || height >= std::numeric_limits<int>::max()) {
347  throw std::runtime_error(strprintf("Activation height %ld for segwit is out of valid range. Use -1 to disable segwit.", height));
348  } else if (height == -1) {
349  LogPrintf("Segwit disabled for testing\n");
350  height = std::numeric_limits<int>::max();
351  }
352  consensus.SegwitHeight = static_cast<int>(height);
353  }
354 
355  if (!args.IsArgSet("-vbparams")) return;
356 
357  for (const std::string& strDeployment : args.GetArgs("-vbparams")) {
358  std::vector<std::string> vDeploymentParams;
359  boost::split(vDeploymentParams, strDeployment, boost::is_any_of(":"));
360  if (vDeploymentParams.size() != 3) {
361  throw std::runtime_error("Version bits parameters malformed, expecting deployment:start:end");
362  }
363  int64_t nStartTime, nTimeout;
364  if (!ParseInt64(vDeploymentParams[1], &nStartTime)) {
365  throw std::runtime_error(strprintf("Invalid nStartTime (%s)", vDeploymentParams[1]));
366  }
367  if (!ParseInt64(vDeploymentParams[2], &nTimeout)) {
368  throw std::runtime_error(strprintf("Invalid nTimeout (%s)", vDeploymentParams[2]));
369  }
370  bool found = false;
371  for (int j=0; j < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j) {
372  if (vDeploymentParams[0] == VersionBitsDeploymentInfo[j].name) {
373  UpdateVersionBitsParameters(Consensus::DeploymentPos(j), nStartTime, nTimeout);
374  found = true;
375  LogPrintf("Setting version bits activation parameters for %s to start=%ld, timeout=%ld\n", vDeploymentParams[0], nStartTime, nTimeout);
376  break;
377  }
378  }
379  if (!found) {
380  throw std::runtime_error(strprintf("Invalid deployment (%s)", vDeploymentParams[0]));
381  }
382  }
383 }
384 
385 static std::unique_ptr<const CChainParams> globalChainParams;
386 
388  assert(globalChainParams);
389  return *globalChainParams;
390 }
391 
392 std::unique_ptr<const CChainParams> CreateChainParams(const std::string& chain)
393 {
394  if (chain == CBaseChainParams::MAIN)
395  return std::unique_ptr<CChainParams>(new CMainParams());
396  else if (chain == CBaseChainParams::TESTNET)
397  return std::unique_ptr<CChainParams>(new CTestNetParams());
398  else if (chain == CBaseChainParams::REGTEST)
399  return std::unique_ptr<CChainParams>(new CRegTestParams(gArgs));
400  throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
401 }
402 
403 void SelectParams(const std::string& network)
404 {
405  SelectBaseParams(network);
407 }
uint32_t nNonce
Definition: block.h:29
static constexpr int64_t NO_TIMEOUT
Constant for nTimeout very far in the future.
Definition: params.h:33
std::unique_ptr< const CChainParams > CreateChainParams(const std::string &chain)
Creates and returns a std::unique_ptr<CChainParams> of the chosen chain.
bool IsArgSet(const std::string &strArg) const
Return true if the given argument has been manually set.
Definition: system.cpp:375
uint256 BIP34Hash
Definition: params.h:52
int nDefaultPort
Definition: chainparams.h:94
void SetNull()
Definition: uint256.h:38
Main network.
Definition: chainparams.cpp:62
int64_t nPowTargetTimespan
Definition: params.h:79
bool fPowNoRetargeting
Definition: params.h:77
static const std::string REGTEST
Definition: block.h:62
void UpdateActivationParametersFromArgs(const ArgsManager &args)
#define strprintf
Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for...
Definition: tinyformat.h:1164
std::vector< CTxIn > vin
Definition: transaction.h:349
std::vector< unsigned char > base58Prefixes[MAX_BASE58_TYPES]
Definition: chainparams.h:99
static const CAmount COIN
Definition: amount.h:14
#define ARRAYLEN(array)
Utilities for converting data from/to strings.
Definition: strencodings.h:19
std::vector< unsigned char > ParseHex(const char *psz)
static CTransactionRef MakeTransactionRef()
Definition: transaction.h:390
bool fPowAllowMinDifficultyBlocks
Definition: params.h:76
int BIP66Height
Block height at which BIP66 becomes active.
Definition: params.h:56
uint64_t m_assumed_chain_state_size
Definition: chainparams.h:97
static void LogPrintf(const char *fmt, const Args &... args)
Definition: logging.h:166
static SeedSpec6 pnSeed6_test[]
CChainParams defines various tweakable parameters of a given instance of the Bitcoin system...
Definition: chainparams.h:47
std::string bech32_hrp
Definition: chainparams.h:100
CBlock genesis
Definition: chainparams.h:102
int CSVHeight
Block height at which CSV (BIP68, BIP112 and BIP113) becomes active.
Definition: params.h:58
uint32_t nTime
Definition: block.h:27
CMessageHeader::MessageStartChars pchMessageStart
Definition: chainparams.h:93
bool ParseInt64(const std::string &str, int64_t *out)
Convert string to signed 64-bit integer with strict parse error feedback.
ChainTxData chainTxData
Definition: chainparams.h:109
static const std::string MAIN
Chain name strings.
uint64_t m_assumed_blockchain_size
Definition: chainparams.h:96
int nSubsidyHalvingInterval
Definition: params.h:47
int64_t CAmount
Amount in satoshis (Can be negative)
Definition: amount.h:12
uint256 powLimit
Proof of work parameters.
Definition: params.h:75
uint256 hashMerkleRoot
Definition: block.h:26
DeploymentPos
Definition: params.h:14
bool fRequireStandard
Definition: chainparams.h:105
const char * name
Definition: rest.cpp:41
void SelectParams(const std::string &network)
Sets the params returned by Params() to those for the given chain name.
int BIP34Height
Block height and hash at which BIP34 becomes active.
Definition: params.h:51
CRegTestParams(const ArgsManager &args)
uint256 uint256S(const char *str)
Definition: uint256.h:133
int64_t nStartTime
Start MedianTime for version bits miner confirmation.
Definition: params.h:28
Regression test.
uint256 BIP16Exception
Definition: params.h:49
int64_t nPowTargetSpacing
Definition: params.h:78
uint256 hashPrevBlock
Definition: block.h:25
Holds various statistics on transactions within a chain.
Definition: chainparams.h:34
std::vector< std::string > vSeeds
Definition: chainparams.h:98
void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
Allows modifying the Version Bits regtest parameters.
static std::unique_ptr< const CChainParams > globalChainParams
uint256 BlockMerkleRoot(const CBlock &block, bool *mutated)
Definition: merkle.cpp:65
bool m_is_mockable_chain
Definition: chainparams.h:107
uint32_t nMinerConfirmationWindow
Definition: params.h:72
std::vector< CTxOut > vout
Definition: transaction.h:350
int BIP65Height
Block height at which BIP65 becomes active.
Definition: params.h:54
Testnet (v3)
uint256 GetHash() const
Definition: block.cpp:11
int64_t nTimeout
Timeout/expiry MedianTime for the deployment attempt.
Definition: params.h:30
256-bit opaque blob.
Definition: uint256.h:123
uint256 nMinimumChainWork
Definition: params.h:81
std::vector< CTransactionRef > vtx
Definition: block.h:66
const struct VBDeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION_BITS_DEPLOYMENTS]
std::vector< SeedSpec6 > vFixedSeeds
Definition: chainparams.h:103
uint256 defaultAssumeValid
Definition: params.h:82
const CChainParams & Params()
Return the currently selected parameters.
Serialized script, used inside transaction inputs and outputs.
Definition: script.h:390
Consensus::Params consensus
Definition: chainparams.h:92
std::string GetArg(const std::string &strArg, const std::string &strDefault) const
Return string argument or default value.
Definition: system.cpp:463
std::string strNetworkID
Definition: chainparams.h:101
ArgsManager gArgs
Definition: system.cpp:82
int MinBIP9WarningHeight
Don&#39;t warn about unknown BIP 9 activations below this height.
Definition: params.h:65
static const std::string TESTNET
A mutable version of CTransaction.
Definition: transaction.h:347
uint32_t nRuleChangeActivationThreshold
Minimum blocks including miner confirmation of the total of 2016 blocks in a retargeting period...
Definition: params.h:71
uint64_t nPruneAfterHeight
Definition: chainparams.h:95
int SegwitHeight
Block height at which Segwit (BIP141, BIP143 and BIP147) becomes active.
Definition: params.h:62
bool m_is_test_chain
Definition: chainparams.h:106
int bit
Bit position to select the particular bit in nVersion.
Definition: params.h:26
std::vector< std::string > GetArgs(const std::string &strArg) const
Return a vector of strings of the given argument.
Definition: system.cpp:366
CCheckpointData checkpointData
Definition: chainparams.h:108
void SelectBaseParams(const std::string &chain)
Sets the params returned by Params() to those for the given network.
static SeedSpec6 pnSeed6_main[]
List of fixed seed nodes for the bitcoin network AUTOGENERATED by contrib/seeds/generate-seeds.py.
int32_t nVersion
Definition: block.h:24
uint256 hashGenesisBlock
Definition: params.h:46
bool fDefaultConsistencyChecks
Definition: chainparams.h:104
BIP9Deployment vDeployments[MAX_VERSION_BITS_DEPLOYMENTS]
Definition: params.h:73
uint32_t nBits
Definition: block.h:28
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:20