1  // Copyright (c) 2020-2022 The Bitcoin Core 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 BITCOIN_DEPLOYMENTSTATUS_H
 6  #define BITCOIN_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      return ThresholdState::ACTIVE == versionbitscache.State(pindexPrev, params, dep);
24  }
25  
26  /** Determine if a deployment is active for this block */
27  inline bool DeploymentActiveAt(const CBlockIndex& index, const Consensus::Params& params, Consensus::BuriedDeployment dep, [[maybe_unused]] VersionBitsCache& versionbitscache)
28  {
29      assert(Consensus::ValidDeployment(dep));
30      return index.nHeight >= params.DeploymentHeight(dep);
31  }
32  
33  inline bool DeploymentActiveAt(const CBlockIndex& index, const Consensus::Params& params, Consensus::DeploymentPos dep, VersionBitsCache& versionbitscache)
34  {
35      assert(Consensus::ValidDeployment(dep));
36      return DeploymentActiveAfter(index.pprev, params, dep, versionbitscache);
37  }
38  
39  /** Determine if a deployment is enabled (can ever be active) */
40  inline bool DeploymentEnabled(const Consensus::Params& params, Consensus::BuriedDeployment dep)
41  {
42      assert(Consensus::ValidDeployment(dep));
43      return params.DeploymentHeight(dep) != std::numeric_limits<int>::max();
44  }
45  
46  inline bool DeploymentEnabled(const Consensus::Params& params, Consensus::DeploymentPos dep)
47  {
48      assert(Consensus::ValidDeployment(dep));
49      return params.vDeployments[dep].nStartTime != Consensus::BIP9Deployment::NEVER_ACTIVE;
50  }
51  
52  #endif // BITCOIN_DEPLOYMENTSTATUS_H