Remove mempool global from init

Can be reviewed with the git diff options

--color-moved=dimmed-zebra --color-moved-ws=ignore-all-space --ignore-all-space

src/init.cpp

@@ -187,7 +187,7 @@ void Shutdown(NodeContext& node)
     /// Be sure that anything that writes files or flushes caches only does this if the respective
     /// module was initialized.
     util::ThreadRename("shutoff");
-    mempool.AddTransactionsUpdated(1);
+    if (node.mempool) node.mempool->AddTransactionsUpdated(1);
 
     StopHTTPRPC();
     StopREST();
@@ -231,8 +231,8 @@ void Shutdown(NodeContext& node)
     node.connman.reset();
     node.banman.reset();
 
-    if (::mempool.IsLoaded() && node.args->GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
+    if (node.mempool && node.mempool->IsLoaded() && node.args->GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
-        DumpMempool(::mempool);
+        DumpMempool(*node.mempool);
     }
 
     if (fFeeEstimatesInitialized)
@@ -738,10 +738,7 @@ static void ThreadImport(ChainstateManager& chainman, std::vector<fs::path> vImp
         return;
     }
     } // End scope of CImportingNow
-    if (args.GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
+    chainman.ActiveChainstate().LoadMempool(args);
-        LoadMempool(::mempool);
-    }
-    ::mempool.SetIsLoaded(!ShutdownRequested());
 }
 
 /** Sanity checks
@@ -1054,11 +1051,6 @@ bool AppInitParameterInteraction(const ArgsManager& args)
         }
     }
 
-    // Checkmempool and checkblockindex default to true in regtest mode
-    int ratio = std::min<int>(std::max<int>(args.GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
-    if (ratio != 0) {
-        mempool.setSanityCheck(1.0 / ratio);
-    }
     fCheckBlockIndex = args.GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());
     fCheckpointsEnabled = args.GetBoolArg("-checkpoints", DEFAULT_CHECKPOINTS_ENABLED);
 
@@ -1368,10 +1360,18 @@ bool AppInitMain(const util::Ref& context, NodeContext& node, interfaces::BlockA
     node.banman = MakeUnique<BanMan>(GetDataDir() / "banlist.dat", &uiInterface, args.GetArg("-bantime", DEFAULT_MISBEHAVING_BANTIME));
     assert(!node.connman);
     node.connman = MakeUnique<CConnman>(GetRand(std::numeric_limits<uint64_t>::max()), GetRand(std::numeric_limits<uint64_t>::max()), args.GetBoolArg("-networkactive", true));
+
     // Make mempool generally available in the node context. For example the connection manager, wallet, or RPC threads,
     // which are all started after this, may use it from the node context.
     assert(!node.mempool);
     node.mempool = &::mempool;
+    if (node.mempool) {
+        int ratio = std::min<int>(std::max<int>(args.GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
+        if (ratio != 0) {
+            node.mempool->setSanityCheck(1.0 / ratio);
+        }
+    }
+
     assert(!node.chainman);
     node.chainman = &g_chainman;
     ChainstateManager& chainman = *Assert(node.chainman);

src/validation.cpp

@@ -4227,6 +4227,14 @@ bool static LoadBlockIndexDB(ChainstateManager& chainman, const CChainParams& ch
     return true;
 }
 
+void CChainState::LoadMempool(const ArgsManager& args)
+{
+    if (args.GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
+        ::LoadMempool(m_mempool);
+    }
+    m_mempool.SetIsLoaded(!ShutdownRequested());
+}
+
 bool CChainState::LoadChainTip(const CChainParams& chainparams)
 {
     AssertLockHeld(cs_main);

src/validation.h

@@ -671,6 +671,9 @@ public:
      */
     void CheckBlockIndex(const Consensus::Params& consensusParams);
 
+    /** Load the persisted mempool from disk */
+    void LoadMempool(const ArgsManager& args);
+
     /** Update the chain tip based on database information, i.e. CoinsTip()'s best block. */
     bool LoadChainTip(const CChainParams& chainparams) EXCLUSIVE_LOCKS_REQUIRED(cs_main);