Drop JSONRPCRequest constructors after #21366

This just makes an additional simplification after #21366 replaced
util::Ref with std::any. It was originally suggested
https://github.com/bitcoin/bitcoin/pull/21366#issuecomment-792044351 but
delayed for a followup. It would have prevented usage bug
https://github.com/bitcoin/bitcoin/pull/21572.

src/bitcoind.cpp

@@ -224,7 +224,7 @@ static bool AppInit(int argc, char* argv[])
             // If locking the data directory failed, exit immediately
             return false;
         }
-        fRet = AppInitInterfaces(node) && AppInitMain(context, node);
+        fRet = AppInitInterfaces(node) && AppInitMain(node);
     }
     catch (const std::exception& e) {
         PrintExceptionContinue(&e, "AppInit()");

src/httprpc.cpp

@@ -159,7 +159,8 @@ static bool HTTPReq_JSONRPC(const std::any& context, HTTPRequest* req)
         return false;
     }
 
-    JSONRPCRequest jreq(context);
+    JSONRPCRequest jreq;
+    jreq.context = context;
     jreq.peerAddr = req->GetPeer().ToString();
     if (!RPCAuthorized(authHeader.second, jreq.authUser)) {
         LogPrintf("ThreadRPCServer incorrect password attempt from %s\n", jreq.peerAddr);
@@ -294,7 +295,7 @@ bool StartHTTPRPC(const std::any& context)
     if (!InitRPCAuthentication())
         return false;
 
-    auto handle_rpc = [&context](HTTPRequest* req, const std::string&) { return HTTPReq_JSONRPC(context, req); };
+    auto handle_rpc = [context](HTTPRequest* req, const std::string&) { return HTTPReq_JSONRPC(context, req); };
     RegisterHTTPHandler("/", true, handle_rpc);
     if (g_wallet_init_interface.HasWalletSupport()) {
         RegisterHTTPHandler("/wallet/", false, handle_rpc);

src/init.cpp

@@ -788,7 +788,7 @@ static bool InitSanityCheck()
     return true;
 }
 
-static bool AppInitServers(const std::any& context, NodeContext& node)
+static bool AppInitServers(NodeContext& node)
 {
     const ArgsManager& args = *Assert(node.args);
     RPCServer::OnStarted(&OnRPCStarted);
@@ -797,9 +797,9 @@ static bool AppInitServers(const std::any& context, NodeContext& node)
         return false;
     StartRPC();
     node.rpc_interruption_point = RpcInterruptionPoint;
-    if (!StartHTTPRPC(context))
+    if (!StartHTTPRPC(&node))
         return false;
-    if (args.GetBoolArg("-rest", DEFAULT_REST_ENABLE)) StartREST(context);
+    if (args.GetBoolArg("-rest", DEFAULT_REST_ENABLE)) StartREST(&node);
     StartHTTPServer();
     return true;
 }
@@ -1277,7 +1277,7 @@ bool AppInitInterfaces(NodeContext& node)
     return true;
 }
 
-bool AppInitMain(const std::any& context, NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
+bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
 {
     const ArgsManager& args = *Assert(node.args);
     const CChainParams& chainparams = Params();
@@ -1382,7 +1382,7 @@ bool AppInitMain(const std::any& context, NodeContext& node, interfaces::BlockAn
      */
     if (args.GetBoolArg("-server", false)) {
         uiInterface.InitMessage_connect(SetRPCWarmupStatus);
-        if (!AppInitServers(context, node))
+        if (!AppInitServers(node))
             return InitError(_("Unable to start HTTP server. See debug log for details."));
     }
 

src/init.h

@@ -64,7 +64,7 @@ bool AppInitInterfaces(NodeContext& node);
  * @note This should only be done after daemonization. Call Shutdown() if this function fails.
  * @pre Parameters should be parsed and config file should be read, AppInitLockDataDirectory should have been called.
  */
-bool AppInitMain(const std::any& context, NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info = nullptr);
+bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info = nullptr);
 
 /**
  * Register all arguments with the ArgsManager

src/node/interfaces.cpp

@@ -80,7 +80,7 @@ public:
     }
     bool appInitMain(interfaces::BlockAndHeaderTipInfo* tip_info) override
     {
-        return AppInitMain(m_context_ref, *m_context, tip_info);
+        return AppInitMain(*m_context, tip_info);
     }
     void appShutdown() override
     {
@@ -244,7 +244,8 @@ public:
     CFeeRate getDustRelayFee() override { return ::dustRelayFee; }
     UniValue executeRpc(const std::string& command, const UniValue& params, const std::string& uri) override
     {
-        JSONRPCRequest req(m_context_ref);
+        JSONRPCRequest req;
+        req.context = m_context;
         req.params = params;
         req.strMethod = command;
         req.URI = uri;
@@ -314,14 +315,8 @@ public:
     void setContext(NodeContext* context) override
     {
         m_context = context;
-        if (context) {
-            m_context_ref = context;
-        } else {
-            m_context_ref.reset();
-        }
     }
     NodeContext* m_context{nullptr};
-    std::any m_context_ref;
 };
 
 bool FillBlock(const CBlockIndex* index, const FoundBlock& block, UniqueLock<RecursiveMutex>& lock, const CChain& active)

src/rest.cpp

@@ -317,7 +317,8 @@ static bool rest_chaininfo(const std::any& context, HTTPRequest* req, const std:
 
     switch (rf) {
     case RetFormat::JSON: {
-        JSONRPCRequest jsonRequest(context);
+        JSONRPCRequest jsonRequest;
+        jsonRequest.context = context;
         jsonRequest.params = UniValue(UniValue::VARR);
         UniValue chainInfoObject = getblockchaininfo().HandleRequest(jsonRequest);
         std::string strJSON = chainInfoObject.write() + "\n";
@@ -687,7 +688,7 @@ static const struct {
 void StartREST(const std::any& context)
 {
     for (const auto& up : uri_prefixes) {
-        auto handler = [&context, up](HTTPRequest* req, const std::string& prefix) { return up.handler(context, req, prefix); };
+        auto handler = [context, up](HTTPRequest* req, const std::string& prefix) { return up.handler(context, req, prefix); };
         RegisterHTTPHandler(up.prefix, false, handler);
     }
 }

src/rpc/request.h

@@ -35,18 +35,7 @@ public:
     std::string URI;
     std::string authUser;
     std::string peerAddr;
-    const std::any& context;
+    std::any context;
-
-    explicit JSONRPCRequest(const std::any& context) : id(NullUniValue), params(NullUniValue), context(context) {}
-
-    //! Initializes request information from another request object and the
-    //! given context. The implementation should be updated if any members are
-    //! added or removed above.
-    JSONRPCRequest(const JSONRPCRequest& other, const std::any& context)
-        : id(other.id), strMethod(other.strMethod), params(other.params), mode(other.mode), URI(other.URI),
-          authUser(other.authUser), peerAddr(other.peerAddr), context(context)
-    {
-    }
 
     void parse(const UniValue& valRequest);
 };

src/test/rpc_tests.cpp

@@ -33,8 +33,8 @@ UniValue RPCTestingSetup::CallRPC(std::string args)
     boost::split(vArgs, args, boost::is_any_of(" \t"));
     std::string strMethod = vArgs[0];
     vArgs.erase(vArgs.begin());
-    std::any context{&m_node};
+    JSONRPCRequest request;
-    JSONRPCRequest request(context);
+    request.context = &m_node;
     request.strMethod = strMethod;
     request.params = RPCConvertValues(strMethod, vArgs);
     if (RPCIsInWarmup(nullptr)) SetRPCWarmupFinished();

src/wallet/interfaces.cpp

@@ -514,7 +514,9 @@ public:
     {
         for (const CRPCCommand& command : GetWalletRPCCommands()) {
             m_rpc_commands.emplace_back(command.category, command.name, [this, &command](const JSONRPCRequest& request, UniValue& result, bool last_handler) {
-                return command.actor({request, &m_context}, result, last_handler);
+                JSONRPCRequest wallet_request = request;
+                wallet_request.context = &m_context;
+                return command.actor(wallet_request, result, last_handler);
             }, command.argNames, command.unique_id);
             m_rpc_handlers.emplace_back(m_context.chain->handleRpc(m_rpc_commands.back()));
         }
@@ -522,7 +524,9 @@ public:
 #ifdef ENABLE_EXTERNAL_SIGNER
         for (const CRPCCommand& command : GetSignerRPCCommands()) {
             m_rpc_commands.emplace_back(command.category, command.name, [this, &command](const JSONRPCRequest& request, UniValue& result, bool last_handler) {
-                return command.actor({request, &m_context}, result, last_handler);
+                JSONRPCRequest wallet_request = request;
+                wallet_request.context = &m_context;
+                return command.actor(wallet_request, result, last_handler);
             }, command.argNames, command.unique_id);
             m_rpc_handlers.emplace_back(m_context.chain->handleRpc(m_rpc_commands.back()));
         }

src/wallet/test/wallet_tests.cpp

@@ -213,8 +213,7 @@ BOOST_FIXTURE_TEST_CASE(importmulti_rescan, TestChain100Setup)
         key.pushKV("timestamp", newTip->GetBlockTimeMax() + TIMESTAMP_WINDOW + 1);
         key.pushKV("internal", UniValue(true));
         keys.push_back(key);
-        std::any context;
+        JSONRPCRequest request;
-        JSONRPCRequest request(context);
         request.params.setArray();
         request.params.push_back(keys);
 
@@ -265,8 +264,7 @@ BOOST_FIXTURE_TEST_CASE(importwallet_rescan, TestChain100Setup)
             AddWallet(wallet);
             wallet->SetLastBlockProcessed(::ChainActive().Height(), ::ChainActive().Tip()->GetBlockHash());
         }
-        std::any context;
+        JSONRPCRequest request;
-        JSONRPCRequest request(context);
         request.params.setArray();
         request.params.push_back(backup_file);
 
@@ -281,8 +279,7 @@ BOOST_FIXTURE_TEST_CASE(importwallet_rescan, TestChain100Setup)
         LOCK(wallet->cs_wallet);
         wallet->SetupLegacyScriptPubKeyMan();
 
-        std::any context;
+        JSONRPCRequest request;
-        JSONRPCRequest request(context);
         request.params.setArray();
         request.params.push_back(backup_file);
         AddWallet(wallet);