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55ac5f568a
Previously we used deployments that would timeout prior to Bitcoin's invention, which allowed the deployment to still be activated in unit tests. This switches those deployments to be truly never active.
107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_CONSENSUS_PARAMS_H
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#define BITCOIN_CONSENSUS_PARAMS_H
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#include <uint256.h>
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#include <limits>
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namespace Consensus {
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enum DeploymentPos
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{
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DEPLOYMENT_TESTDUMMY,
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DEPLOYMENT_TAPROOT, // Deployment of Schnorr/Taproot (BIPs 340-342)
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// NOTE: Also add new deployments to VersionBitsDeploymentInfo in versionbits.cpp
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MAX_VERSION_BITS_DEPLOYMENTS
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};
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/**
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* Struct for each individual consensus rule change using BIP9.
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*/
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struct BIP9Deployment {
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/** Bit position to select the particular bit in nVersion. */
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int bit;
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/** Start MedianTime for version bits miner confirmation. Can be a date in the past */
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int64_t nStartTime;
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/** Timeout/expiry MedianTime for the deployment attempt. */
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int64_t nTimeout;
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/** If lock in occurs, delay activation until at least this block
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* height. Note that activation will only occur on a retarget
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* boundary.
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*/
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int min_activation_height{0};
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/** Constant for nTimeout very far in the future. */
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static constexpr int64_t NO_TIMEOUT = std::numeric_limits<int64_t>::max();
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/** Special value for nStartTime indicating that the deployment is always active.
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* This is useful for testing, as it means tests don't need to deal with the activation
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* process (which takes at least 3 BIP9 intervals). Only tests that specifically test the
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* behaviour during activation cannot use this. */
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static constexpr int64_t ALWAYS_ACTIVE = -1;
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/** Special value for nStartTime indicating that the deployment is never active.
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* This is useful for integrating the code changes for a new feature
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* prior to deploying it on some or all networks. */
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static constexpr int64_t NEVER_ACTIVE = -2;
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};
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/**
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* Parameters that influence chain consensus.
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*/
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struct Params {
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uint256 hashGenesisBlock;
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int nSubsidyHalvingInterval;
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/* Block hash that is excepted from BIP16 enforcement */
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uint256 BIP16Exception;
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/** Block height and hash at which BIP34 becomes active */
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int BIP34Height;
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uint256 BIP34Hash;
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/** Block height at which BIP65 becomes active */
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int BIP65Height;
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/** Block height at which BIP66 becomes active */
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int BIP66Height;
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/** Block height at which CSV (BIP68, BIP112 and BIP113) becomes active */
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int CSVHeight;
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/** Block height at which Segwit (BIP141, BIP143 and BIP147) becomes active.
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* Note that segwit v0 script rules are enforced on all blocks except the
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* BIP 16 exception blocks. */
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int SegwitHeight;
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/** Don't warn about unknown BIP 9 activations below this height.
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* This prevents us from warning about the CSV and segwit activations. */
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int MinBIP9WarningHeight;
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/**
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* Minimum blocks including miner confirmation of the total of 2016 blocks in a retargeting period,
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* (nPowTargetTimespan / nPowTargetSpacing) which is also used for BIP9 deployments.
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* Examples: 1916 for 95%, 1512 for testchains.
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*/
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uint32_t nRuleChangeActivationThreshold;
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uint32_t nMinerConfirmationWindow;
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BIP9Deployment vDeployments[MAX_VERSION_BITS_DEPLOYMENTS];
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/** Proof of work parameters */
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uint256 powLimit;
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bool fPowAllowMinDifficultyBlocks;
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bool fPowNoRetargeting;
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int64_t nPowTargetSpacing;
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int64_t nPowTargetTimespan;
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int64_t DifficultyAdjustmentInterval() const { return nPowTargetTimespan / nPowTargetSpacing; }
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/** The best chain should have at least this much work */
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uint256 nMinimumChainWork;
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/** By default assume that the signatures in ancestors of this block are valid */
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uint256 defaultAssumeValid;
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/**
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* If true, witness commitments contain a payload equal to a Bitcoin Script solution
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* to the signet challenge. See BIP325.
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*/
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bool signet_blocks{false};
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std::vector<uint8_t> signet_challenge;
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};
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} // namespace Consensus
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#endif // BITCOIN_CONSENSUS_PARAMS_H
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