ce564e381a
Changes are as below: Wrap CBlockHeader::nVersion into a new class (CBlockVersion). This allows to take care of interpreting the field into a base version, auxpow flag and the chain ID. Update getauxblock.py for new 'generate' RPC call. Add 'auxpow' to block JSON. Accept auxpow as PoW verification. Add unit tests for auxpow verification. Add check for memory-layout of CBlockVersion. Weaken auxpow chain ID checks for the testnet. Allow Params() to overrule when to check the auxpow chain ID and for legacy blocks. Use this to disable the checks on testnet. Introduce CPureBlockHeader. Split the block header part that is used by auxpow and the "real" block header (that uses auxpow) to resolve the cyclic dependency between the two. Differentiate between uint256 and arith_uint256. This change was done upstream, modify the auxpow code. Add missing lock in auxpow_tests. Fix REST header check for auxpow headers. Those can be longer, thus take that into account. Also perform the check actually on an auxpow header. Correctly set the coinbase for getauxblock results. Call IncrementExtraNonce in getauxblock so that the coinbase is actually initialised with the stuff it should be. (BIP30 block height and COINBASE_FLAGS.) Implement getauxblock plus regression test. Turn auxpow test into FIXTURE test. This allows using of the Params() calls. Move CMerkleTx code to auxpow.cpp. Otherwise we get linker errors when building without wallet. Fix rebase with BIP66. Update the code to handle BIP66's nVersion=3. Enforce that auxpow parent blocks have no auxpow block version. This is for compatibility with namecoind. See also https://github.com/namecoin/namecoin/pull/199. Move auxpow-related parameters to Consensus::Params.
100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2018 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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#include <map>
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#include <string>
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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_CSV, // Deployment of BIP68, BIP112, and BIP113.
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DEPLOYMENT_SEGWIT, // Deployment of BIP141, BIP143, and BIP147.
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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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/** 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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};
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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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/**
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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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uint256 nMinimumChainWork;
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uint256 defaultAssumeValid;
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/** Auxpow parameters */
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int32_t nAuxpowChainId;
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int nAuxpowStartHeight;
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bool fStrictChainId;
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int nLegacyBlocksBefore; // -1 for "always allow"
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/**
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* Check whether or not to allow legacy blocks at the given height.
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* @param nHeight Height of the block to check.
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* @return True if it is allowed to have a legacy version.
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*/
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bool AllowLegacyBlocks(unsigned nHeight) const
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{
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if (nLegacyBlocksBefore < 0)
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return true;
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return static_cast<int> (nHeight) < nLegacyBlocksBefore;
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}
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};
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} // namespace Consensus
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#endif // BITCOIN_CONSENSUS_PARAMS_H
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