000 [src/versionbits.h] @ @@ -1,107 +0,0 @@

[ihavenoface]

Context: https://github.com/peercoin/peercoin/blob/6839e7cc431fd284b80fdf6a2d338aa03ca3ab6a/src/versionbits.h#L0-L-1
Origin: https://github.com/ihavenoface/diff-btc-ppc/blob/main/src/versionbits.h.diff

@@ -1,107 +0,0 @@
-// Copyright (c) 2016-2021 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef BITCOIN_VERSIONBITS_H
-#define BITCOIN_VERSIONBITS_H
-
-#include <chain.h>
-#include <sync.h>
-
-#include <map>
-
-/** What block version to use for new blocks (pre versionbits) */
-static const int32_t VERSIONBITS_LAST_OLD_BLOCK_VERSION = 4;
-/** What bits to set in version for versionbits blocks */
-static const int32_t VERSIONBITS_TOP_BITS = 0x20000000UL;
-/** What bitmask determines whether versionbits is in use */
-static const int32_t VERSIONBITS_TOP_MASK = 0xE0000000UL;
-/** Total bits available for versionbits */
-static const int32_t VERSIONBITS_NUM_BITS = 29;
-
-/** BIP 9 defines a finite-state-machine to deploy a softfork in multiple stages.
- *  State transitions happen during retarget period if conditions are met
- *  In case of reorg, transitions can go backward. Without transition, state is
- *  inherited between periods. All blocks of a period share the same state.
- */
-enum class ThresholdState {
-    DEFINED,   // First state that each softfork starts out as. The genesis block is by definition in this state for each deployment.
-    STARTED,   // For blocks past the starttime.
-    LOCKED_IN, // For at least one retarget period after the first retarget period with STARTED blocks of which at least threshold have the associated bit set in nVersion, until min_activation_height is reached.
-    ACTIVE,    // For all blocks after the LOCKED_IN retarget period (final state)
-    FAILED,    // For all blocks once the first retarget period after the timeout time is hit, if LOCKED_IN wasn't already reached (final state)
-};
-
-// A map that gives the state for blocks whose height is a multiple of Period().
-// The map is indexed by the block's parent, however, so all keys in the map
-// will either be nullptr or a block with (height + 1) % Period() == 0.
-typedef std::map<const CBlockIndex*, ThresholdState> ThresholdConditionCache;
-
-/** Display status of an in-progress BIP9 softfork */
-struct BIP9Stats {
-    /** Length of blocks of the BIP9 signalling period */
-    int period;
-    /** Number of blocks with the version bit set required to activate the softfork */
-    int threshold;
-    /** Number of blocks elapsed since the beginning of the current period */
-    int elapsed;
-    /** Number of blocks with the version bit set since the beginning of the current period */
-    int count;
-    /** False if there are not enough blocks left in this period to pass activation threshold */
-    bool possible;
-};
-
-/**
- * Abstract class that implements BIP9-style threshold logic, and caches results.
- */
-class AbstractThresholdConditionChecker {
-protected:
-    virtual bool Condition(const CBlockIndex* pindex, const Consensus::Params& params) const =0;
-    virtual int64_t BeginTime(const Consensus::Params& params) const =0;
-    virtual int64_t EndTime(const Consensus::Params& params) const =0;
-    virtual int MinActivationHeight(const Consensus::Params& params) const { return 0; }
-    virtual int Period(const Consensus::Params& params) const =0;
-    virtual int Threshold(const Consensus::Params& params) const =0;
-
-public:
-    /** Returns the numerical statistics of an in-progress BIP9 softfork in the period including pindex
-     * If provided, signalling_blocks is set to true/false based on whether each block in the period signalled
-     */
-    BIP9Stats GetStateStatisticsFor(const CBlockIndex* pindex, const Consensus::Params& params, std::vector<bool>* signalling_blocks = nullptr) const;
-    /** Returns the state for pindex A based on parent pindexPrev B. Applies any state transition if conditions are present.
-     *  Caches state from first block of period. */
-    ThresholdState GetStateFor(const CBlockIndex* pindexPrev, const Consensus::Params& params, ThresholdConditionCache& cache) const;
-    /** Returns the height since when the ThresholdState has started for pindex A based on parent pindexPrev B, all blocks of a period share the same */
-    int GetStateSinceHeightFor(const CBlockIndex* pindexPrev, const Consensus::Params& params, ThresholdConditionCache& cache) const;
-};
-
-/** BIP 9 allows multiple softforks to be deployed in parallel. We cache
- *  per-period state for every one of them. */
-class VersionBitsCache
-{
-private:
-    Mutex m_mutex;
-    ThresholdConditionCache m_caches[Consensus::MAX_VERSION_BITS_DEPLOYMENTS] GUARDED_BY(m_mutex);
-
-public:
-    /** Get the numerical statistics for a given deployment for the signalling period that includes pindex.
-     * If provided, signalling_blocks is set to true/false based on whether each block in the period signalled
-     */
-    static BIP9Stats Statistics(const CBlockIndex* pindex, const Consensus::Params& params, Consensus::DeploymentPos pos, std::vector<bool>* signalling_blocks = nullptr);
-
-    static uint32_t Mask(const Consensus::Params& params, Consensus::DeploymentPos pos);
-
-    /** Get the BIP9 state for a given deployment for the block after pindexPrev. */
-    ThresholdState State(const CBlockIndex* pindexPrev, const Consensus::Params& params, Consensus::DeploymentPos pos);
-
-    /** Get the block height at which the BIP9 deployment switched into the state for the block after pindexPrev. */
-    int StateSinceHeight(const CBlockIndex* pindexPrev, const Consensus::Params& params, Consensus::DeploymentPos pos);
-
-    /** Determine what nVersion a new block should use
-     */
-    int32_t ComputeBlockVersion(const CBlockIndex* pindexPrev, const Consensus::Params& params);
-
-    void Clear();
-};
-
-#endif // BITCOIN_VERSIONBITS_H