Bitcoin Core  24.99.0
P2P Digital Currency
params.h
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1 // Copyright (c) 2009-2010 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 #ifndef BITCOIN_CONSENSUS_PARAMS_H
7 #define BITCOIN_CONSENSUS_PARAMS_H
8 
9 #include <uint256.h>
10 
11 #include <chrono>
12 #include <limits>
13 #include <map>
14 
15 namespace Consensus {
16 
21 enum BuriedDeployment : int16_t {
22  // buried deployments get negative values to avoid overlap with DeploymentPos
23  DEPLOYMENT_HEIGHTINCB = std::numeric_limits<int16_t>::min(),
28 };
29 constexpr bool ValidDeployment(BuriedDeployment dep) { return dep <= DEPLOYMENT_SEGWIT; }
30 
31 enum DeploymentPos : uint16_t {
33  DEPLOYMENT_TAPROOT, // Deployment of Schnorr/Taproot (BIPs 340-342)
34  // NOTE: Also add new deployments to VersionBitsDeploymentInfo in deploymentinfo.cpp
36 };
37 constexpr bool ValidDeployment(DeploymentPos dep) { return dep < MAX_VERSION_BITS_DEPLOYMENTS; }
38 
44  int bit{28};
54 
56  static constexpr int64_t NO_TIMEOUT = std::numeric_limits<int64_t>::max();
57 
62  static constexpr int64_t ALWAYS_ACTIVE = -1;
63 
67  static constexpr int64_t NEVER_ACTIVE = -2;
68 };
69 
73 struct Params {
82  std::map<uint256, uint32_t> script_flag_exceptions;
91  int CSVHeight;
113  std::chrono::seconds PowTargetSpacing() const
114  {
115  return std::chrono::seconds{nPowTargetSpacing};
116  }
122 
127  bool signet_blocks{false};
128  std::vector<uint8_t> signet_challenge;
129 
131  {
132  switch (dep) {
134  return BIP34Height;
135  case DEPLOYMENT_CLTV:
136  return BIP65Height;
137  case DEPLOYMENT_DERSIG:
138  return BIP66Height;
139  case DEPLOYMENT_CSV:
140  return CSVHeight;
141  case DEPLOYMENT_SEGWIT:
142  return SegwitHeight;
143  } // no default case, so the compiler can warn about missing cases
144  return std::numeric_limits<int>::max();
145  }
146 };
147 
148 } // namespace Consensus
149 
150 #endif // BITCOIN_CONSENSUS_PARAMS_H
256-bit opaque blob.
Definition: uint256.h:119
Transaction validation functions.
Definition: params.h:15
constexpr bool ValidDeployment(BuriedDeployment dep)
Definition: params.h:29
DeploymentPos
Definition: params.h:31
@ DEPLOYMENT_TAPROOT
Definition: params.h:33
@ DEPLOYMENT_TESTDUMMY
Definition: params.h:32
@ MAX_VERSION_BITS_DEPLOYMENTS
Definition: params.h:35
BuriedDeployment
A buried deployment is one where the height of the activation has been hardcoded into the client impl...
Definition: params.h:21
@ DEPLOYMENT_DERSIG
Definition: params.h:25
@ DEPLOYMENT_CSV
Definition: params.h:26
@ DEPLOYMENT_SEGWIT
Definition: params.h:27
@ DEPLOYMENT_HEIGHTINCB
Definition: params.h:23
@ DEPLOYMENT_CLTV
Definition: params.h:24
Struct for each individual consensus rule change using BIP9.
Definition: params.h:42
int min_activation_height
If lock in occurs, delay activation until at least this block height.
Definition: params.h:53
int bit
Bit position to select the particular bit in nVersion.
Definition: params.h:44
static constexpr int64_t ALWAYS_ACTIVE
Special value for nStartTime indicating that the deployment is always active.
Definition: params.h:62
static constexpr int64_t NEVER_ACTIVE
Special value for nStartTime indicating that the deployment is never active.
Definition: params.h:67
int64_t nTimeout
Timeout/expiry MedianTime for the deployment attempt.
Definition: params.h:48
static constexpr int64_t NO_TIMEOUT
Constant for nTimeout very far in the future.
Definition: params.h:56
int64_t nStartTime
Start MedianTime for version bits miner confirmation.
Definition: params.h:46
Parameters that influence chain consensus.
Definition: params.h:73
int BIP65Height
Block height at which BIP65 becomes active.
Definition: params.h:87
int CSVHeight
Block height at which CSV (BIP68, BIP112 and BIP113) becomes active.
Definition: params.h:91
uint256 BIP34Hash
Definition: params.h:85
uint32_t nMinerConfirmationWindow
Definition: params.h:105
uint256 defaultAssumeValid
By default assume that the signatures in ancestors of this block are valid.
Definition: params.h:121
std::map< uint256, uint32_t > script_flag_exceptions
Hashes of blocks that.
Definition: params.h:82
std::vector< uint8_t > signet_challenge
Definition: params.h:128
int64_t DifficultyAdjustmentInterval() const
Definition: params.h:117
bool signet_blocks
If true, witness commitments contain a payload equal to a Bitcoin Script solution to the signet chall...
Definition: params.h:127
int SegwitHeight
Block height at which Segwit (BIP141, BIP143 and BIP147) becomes active.
Definition: params.h:95
int BIP34Height
Block height and hash at which BIP34 becomes active.
Definition: params.h:84
int nSubsidyHalvingInterval
Definition: params.h:75
BIP9Deployment vDeployments[MAX_VERSION_BITS_DEPLOYMENTS]
Definition: params.h:106
uint256 hashGenesisBlock
Definition: params.h:74
int MinBIP9WarningHeight
Don't warn about unknown BIP 9 activations below this height.
Definition: params.h:98
bool fPowNoRetargeting
Definition: params.h:110
uint256 nMinimumChainWork
The best chain should have at least this much work.
Definition: params.h:119
uint32_t nRuleChangeActivationThreshold
Minimum blocks including miner confirmation of the total of 2016 blocks in a retargeting period,...
Definition: params.h:104
int64_t nPowTargetTimespan
Definition: params.h:112
int BIP66Height
Block height at which BIP66 becomes active.
Definition: params.h:89
uint256 powLimit
Proof of work parameters.
Definition: params.h:108
int DeploymentHeight(BuriedDeployment dep) const
Definition: params.h:130
int64_t nPowTargetSpacing
Definition: params.h:111
std::chrono::seconds PowTargetSpacing() const
Definition: params.h:113
bool fPowAllowMinDifficultyBlocks
Definition: params.h:109