[refactor] Add deploymentstatus.h

Provides DeploymentEnabled, DeploymentActiveAt, and DeploymentActiveAfter
helpers for checking the status of buried deployments. Can be overloaded
so the same syntax works for non-buried deployments, allowing future
soft forks to be changed from signalled to buried deployments without
having to touch the implementation code.

Replaces IsWitnessEnabled and IsScriptWitnessEnabled.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/miner.cpp b/src/miner.cpp
index 0cf303eb3c..c1a992b9e9 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -13,6 +13,7 @@
 #include <consensus/merkle.h>
 #include <consensus/tx_verify.h>
 #include <consensus/validation.h>
+#include <deploymentstatus.h>
 #include <policy/feerate.h>
 #include <policy/policy.h>
 #include <pow.h>
@@ -137,12 +138,12 @@ std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& sc
     // This is only needed in case the witness softfork activation is reverted
     // (which would require a very deep reorganization).
     // Note that the mempool would accept transactions with witness data before
-    // IsWitnessEnabled, but we would only ever mine blocks after IsWitnessEnabled
+    // the deployment is active, but we would only ever mine blocks after activation
     // unless there is a massive block reorganization with the witness softfork
     // not activated.
     // TODO: replace this with a call to main to assess validity of a mempool
     // transaction (which in most cases can be a no-op).
-    fIncludeWitness = IsWitnessEnabled(pindexPrev, chainparams.GetConsensus());
+    fIncludeWitness = DeploymentActiveAfter(pindexPrev, chainparams.GetConsensus(), Consensus::DEPLOYMENT_SEGWIT);
 
     int nPackagesSelected = 0;
     int nDescendantsUpdated = 0;