Remove mempool global

src/init.cpp

@@ -302,7 +302,7 @@ void Shutdown(NodeContext& node)
     GetMainSignals().UnregisterBackgroundSignalScheduler();
     globalVerifyHandle.reset();
     ECC_Stop();
-    node.mempool = nullptr;
+    node.mempool.reset();
     node.chainman = nullptr;
     node.scheduler.reset();
 
@@ -1364,7 +1364,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node, interfaces::BlockA
     // 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;
+    node.mempool = MakeUnique<CTxMemPool>(&::feeEstimator);
     if (node.mempool) {
         int ratio = std::min<int>(std::max<int>(args.GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
         if (ratio != 0) {
@@ -1559,7 +1559,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node, interfaces::BlockA
                 chainman.m_total_coinstip_cache = nCoinCacheUsage;
                 chainman.m_total_coinsdb_cache = nCoinDBCache;
 
-                UnloadBlockIndex(node.mempool);
+                UnloadBlockIndex(node.mempool.get());
 
                 // new CBlockTreeDB tries to delete the existing file, which
                 // fails if it's still open from the previous loop. Close it first:

src/node/context.cpp

@@ -9,6 +9,7 @@
 #include <net.h>
 #include <net_processing.h>
 #include <scheduler.h>
+#include <txmempool.h>
 
 NodeContext::NodeContext() {}
 NodeContext::~NodeContext() {}

src/node/context.h

@@ -35,7 +35,7 @@ class WalletClient;
 //! be used without pulling in unwanted dependencies or functionality.
 struct NodeContext {
     std::unique_ptr<CConnman> connman;
-    CTxMemPool* mempool{nullptr}; // Currently a raw pointer because the memory is not managed by this struct
+    std::unique_ptr<CTxMemPool> mempool;
     std::unique_ptr<PeerLogicValidation> peer_logic;
     ChainstateManager* chainman{nullptr}; // Currently a raw pointer because the memory is not managed by this struct
     std::unique_ptr<BanMan> banman;

src/rest.cpp

@@ -102,7 +102,7 @@ static CTxMemPool* GetMemPool(const util::Ref& context, HTTPRequest* req)
         RESTERR(req, HTTP_NOT_FOUND, "Mempool disabled or instance not found");
         return nullptr;
     }
-    return node->mempool;
+    return node->mempool.get();
 }
 
 static RetFormat ParseDataFormat(std::string& param, const std::string& strReq)
@@ -393,7 +393,7 @@ static bool rest_tx(const util::Ref& context, HTTPRequest* req, const std::strin
     const NodeContext* const node = GetNodeContext(context, req);
     if (!node) return false;
     uint256 hashBlock = uint256();
-    const CTransactionRef tx = GetTransaction(/* block_index */ nullptr, node->mempool, hash, Params().GetConsensus(), hashBlock);
+    const CTransactionRef tx = GetTransaction(/* block_index */ nullptr, node->mempool.get(), hash, Params().GetConsensus(), hashBlock);
     if (!tx) {
         return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
     }

src/rpc/rawtransaction.cpp

@@ -191,7 +191,7 @@ static UniValue getrawtransaction(const JSONRPCRequest& request)
     }
 
     uint256 hash_block;
-    const CTransactionRef tx = GetTransaction(blockindex, node.mempool, hash, Params().GetConsensus(), hash_block);
+    const CTransactionRef tx = GetTransaction(blockindex, node.mempool.get(), hash, Params().GetConsensus(), hash_block);
     if (!tx) {
         std::string errmsg;
         if (blockindex) {

src/test/util/setup_common.cpp

@@ -141,7 +141,7 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
 
     pblocktree.reset(new CBlockTreeDB(1 << 20, true));
 
-    m_node.mempool = &::mempool;
+    m_node.mempool = MakeUnique<CTxMemPool>(&::feeEstimator);
     m_node.mempool->setSanityCheck(1.0);
 
     m_node.chainman = &::g_chainman;
@@ -187,8 +187,8 @@ TestingSetup::~TestingSetup()
     m_node.connman.reset();
     m_node.banman.reset();
     m_node.args = nullptr;
-    UnloadBlockIndex(m_node.mempool);
+    UnloadBlockIndex(m_node.mempool.get());
-    m_node.mempool = nullptr;
+    m_node.mempool.reset();
     m_node.scheduler.reset();
     m_node.chainman->Reset();
     m_node.chainman = nullptr;

src/validation.cpp

@@ -148,7 +148,6 @@ arith_uint256 nMinimumChainWork;
 CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
 
 CBlockPolicyEstimator feeEstimator;
-CTxMemPool mempool(&feeEstimator);
 
 // Internal stuff
 namespace {

src/validation.h

@@ -113,7 +113,6 @@ enum class SynchronizationState {
 
 extern RecursiveMutex cs_main;
 extern CBlockPolicyEstimator feeEstimator;
-extern CTxMemPool mempool;
 typedef std::unordered_map<uint256, CBlockIndex*, BlockHasher> BlockMap;
 extern Mutex g_best_block_mutex;
 extern std::condition_variable g_best_block_cv;