deploymentstatus.h raw

   1  // Copyright (c) 2020-2022 The Limenka developers
   2  // Distributed under the MIT software license, see the accompanying
   3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4  
   5  #ifndef LIMENKA_DEPLOYMENTSTATUS_H
   6  #define LIMENKA_DEPLOYMENTSTATUS_H
   7  
   8  #include <chain.h>
   9  #include <versionbits.h>
  10  
  11  #include <limits>
  12  
  13  /** Determine if a deployment is active for the next block */
  14  inline bool DeploymentActiveAfter(const CBlockIndex* pindexPrev, const Consensus::Params& params, Consensus::BuriedDeployment dep, [[maybe_unused]] VersionBitsCache& versionbitscache)
  15  {
  16      assert(Consensus::ValidDeployment(dep));
  17      return (pindexPrev == nullptr ? 0 : pindexPrev->nHeight + 1) >= params.DeploymentHeight(dep);
  18  }
  19  
  20  inline bool DeploymentActiveAfter(const CBlockIndex* pindexPrev, const Consensus::Params& params, Consensus::DeploymentPos dep, VersionBitsCache& versionbitscache)
  21  {
  22      assert(Consensus::ValidDeployment(dep));
  23      if (ThresholdState::ACTIVE != versionbitscache.State(pindexPrev, params, dep)) return false;
  24  
  25      const auto& deployment = params.vDeployments[dep];
  26      // Permanent deployment (never expires)
  27      if (deployment.active_duration == std::numeric_limits<int>::max()) return true;
  28  
  29      const int activation_height = versionbitscache.StateSinceHeight(pindexPrev, params, dep);
  30      const int height = pindexPrev == nullptr ? 0 : pindexPrev->nHeight + 1;
  31      return height < activation_height + deployment.active_duration;
  32  }
  33  
  34  /** Determine if a deployment is active for this block */
  35  inline bool DeploymentActiveAt(const CBlockIndex& index, const Consensus::Params& params, Consensus::BuriedDeployment dep, [[maybe_unused]] VersionBitsCache& versionbitscache)
  36  {
  37      assert(Consensus::ValidDeployment(dep));
  38      return index.nHeight >= params.DeploymentHeight(dep);
  39  }
  40  
  41  inline bool DeploymentActiveAt(const CBlockIndex& index, const Consensus::Params& params, Consensus::DeploymentPos dep, VersionBitsCache& versionbitscache)
  42  {
  43      assert(Consensus::ValidDeployment(dep));
  44      return DeploymentActiveAfter(index.pprev, params, dep, versionbitscache);
  45  }
  46  
  47  /** Determine if a deployment is enabled (can ever be active) */
  48  inline bool DeploymentEnabled(const Consensus::Params& params, Consensus::BuriedDeployment dep)
  49  {
  50      assert(Consensus::ValidDeployment(dep));
  51      return params.DeploymentHeight(dep) != std::numeric_limits<int>::max();
  52  }
  53  
  54  inline bool DeploymentEnabled(const Consensus::Params& params, Consensus::DeploymentPos dep)
  55  {
  56      assert(Consensus::ValidDeployment(dep));
  57      return params.vDeployments[dep].nStartTime != Consensus::BIP9Deployment::NEVER_ACTIVE;
  58  }
  59  
  60  /** Determine if mandatory signaling is required for a deployment at the next block */
  61  inline bool DeploymentMustSignalAfter(const CBlockIndex* pindexPrev, const Consensus::Params& params, Consensus::DeploymentPos dep, ThresholdState state)
  62  {
  63      assert(Consensus::ValidDeployment(dep));
  64      const auto& deployment = params.vDeployments[dep];
  65      if (deployment.max_activation_height >= std::numeric_limits<int>::max()) return false;
  66      if (state != ThresholdState::STARTED) return false;  // If must_signal height is reached before start time, abstain from enforcement
  67      const int nPeriod = params.nMinerConfirmationWindow;
  68      const int nHeight = pindexPrev == nullptr ? 0 : pindexPrev->nHeight + 1;
  69      return nHeight >= deployment.max_activation_height - (2 * nPeriod)
  70          && nHeight < deployment.max_activation_height - nPeriod;
  71  }
  72  
  73  #endif // LIMENKA_DEPLOYMENTSTATUS_H
  74