Merge #18923: wallet: Never schedule MaybeCompactWalletDB when -flushwallet is off

fa73493930e35850e877725167dc9d42e47015c8 refactor: Use C++11 range-based for loop (MarcoFalke)
fa7b164d62d9f12e9cda79bf28bf435acf2d1e38 wallet: Never schedule MaybeCompactWalletDB when -flushwallet is off (MarcoFalke)
faf8401c195f52470d1ca6e2c94cb3820e57ee41 wallet: Pass unused args to StartWallets (MarcoFalke)
fa6c186436337c8ed7d9e1ab065377f8cda5c0b7 gui tests: Limit life-time of dummy testing setup (MarcoFalke)
fa28a618972911239a119248ab1194702a5c36d8 test: Add smoke test to check that wallets are flushed by default (MarcoFalke)

Pull request description:

  User-facing, this is a refactor. Internally, the scheduler does not have to call a mostly empty function every half a second.

ACKs for top commit:
  jnewbery:
    utACK fa73493930e35850e877725167dc9d42e47015c8
  meshcollider:
    utACK fa73493930e35850e877725167dc9d42e47015c8
  ryanofsky:
    Code review ACK fa73493930e35850e877725167dc9d42e47015c8. Just rebased since last review

Tree-SHA512: 99e1fe1b2c22a3f4b19de3e566241d38693f4fd8d5a68ba1838d86740aa6c08e3325c11a072e30fd262a8861af4278bed52eb9374c85179b8f536477f528247c

8 files changed, 24 insertions, 17 deletions

diff --git a/src/wallet/bdb.cpp b/src/wallet/bdb.cpp
index 5f823d5906..54a9aa34e0 100644
--- a/src/wallet/bdb.cpp
+++ b/src/wallet/bdb.cpp
@@ -623,8 +623,8 @@ bool BerkeleyDatabase::PeriodicFlush()
     if (!lockDb) return false;
 
     // Don't flush if any databases are in use
-    for (auto it = env->mapFileUseCount.begin() ; it != env->mapFileUseCount.end(); it++) {
-        if ((*it).second > 0) return false;
+    for (const auto& use_count : env->mapFileUseCount) {
+        if (use_count.second > 0) return false;
     }
 
     // Don't flush if there haven't been any batch writes for this database.
diff --git a/src/wallet/context.h b/src/wallet/context.h
index 3c8fdd1c59..a83591154f 100644
--- a/src/wallet/context.h
+++ b/src/wallet/context.h
@@ -5,6 +5,7 @@
 #ifndef BITCOIN_WALLET_CONTEXT_H
 #define BITCOIN_WALLET_CONTEXT_H
 
+class ArgsManager;
 namespace interfaces {
 class Chain;
 } // namespace interfaces
@@ -21,6 +22,7 @@ class Chain;
 //! behavior.
 struct WalletContext {
     interfaces::Chain* chain{nullptr};
+    ArgsManager* args{nullptr};
 
     //! Declare default constructor and destructor that are not inline, so code
     //! instantiating the WalletContext struct doesn't need to #include class
diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp
index f173b5e62b..781920755c 100644
--- a/src/wallet/init.cpp
+++ b/src/wallet/init.cpp
@@ -9,6 +9,7 @@
 #include <node/context.h>
 #include <node/ui_interface.h>
 #include <outputtype.h>
+#include <util/check.h>
 #include <util/moneystr.h>
 #include <util/system.h>
 #include <util/translation.h>
@@ -16,9 +17,9 @@
 #include <wallet/wallet.h>
 #include <walletinitinterface.h>
 
-class WalletInit : public WalletInitInterface {
+class WalletInit : public WalletInitInterface
+{
 public:
-
     //! Was the wallet component compiled in.
     bool HasWalletSupport() const override {return true;}
 
@@ -112,10 +113,11 @@ bool WalletInit::ParameterInteraction() const
 
 void WalletInit::Construct(NodeContext& node) const
 {
-    if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
+    ArgsManager& args = *Assert(node.args);
+    if (args.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
         LogPrintf("Wallet disabled!\n");
         return;
     }
-    gArgs.SoftSetArg("-wallet", "");
-    node.chain_clients.emplace_back(interfaces::MakeWalletClient(*node.chain, gArgs.GetArgs("-wallet")));
+    args.SoftSetArg("-wallet", "");
+    node.chain_clients.emplace_back(interfaces::MakeWalletClient(*node.chain, args, args.GetArgs("-wallet")));
 }
diff --git a/src/wallet/load.cpp b/src/wallet/load.cpp
index 8df3e78215..c2818a41e7 100644
--- a/src/wallet/load.cpp
+++ b/src/wallet/load.cpp
@@ -11,6 +11,7 @@
 #include <util/system.h>
 #include <util/translation.h>
 #include <wallet/wallet.h>
+#include <wallet/walletdb.h>
 
 bool VerifyWallets(interfaces::Chain& chain, const std::vector<std::string>& wallet_files)
 {
@@ -82,14 +83,16 @@ bool LoadWallets(interfaces::Chain& chain, const std::vector<std::string>& walle
     }
 }
 
-void StartWallets(CScheduler& scheduler)
+void StartWallets(CScheduler& scheduler, const ArgsManager& args)
 {
     for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
         pwallet->postInitProcess();
     }
 
     // Schedule periodic wallet flushes and tx rebroadcasts
-    scheduler.scheduleEvery(MaybeCompactWalletDB, std::chrono::milliseconds{500});
+    if (args.GetBoolArg("-flushwallet", DEFAULT_FLUSHWALLET)) {
+        scheduler.scheduleEvery(MaybeCompactWalletDB, std::chrono::milliseconds{500});
+    }
     scheduler.scheduleEvery(MaybeResendWalletTxs, std::chrono::milliseconds{1000});
 }
 
diff --git a/src/wallet/load.h b/src/wallet/load.h
index e24b1f2e69..ff4f5b4b23 100644
--- a/src/wallet/load.h
+++ b/src/wallet/load.h
@@ -9,6 +9,7 @@
 #include <string>
 #include <vector>
 
+class ArgsManager;
 class CScheduler;
 
 namespace interfaces {
@@ -22,7 +23,7 @@ bool VerifyWallets(interfaces::Chain& chain, const std::vector<std::string>& wal
 bool LoadWallets(interfaces::Chain& chain, const std::vector<std::string>& wallet_files);
 
 //! Complete startup of wallets.
-void StartWallets(CScheduler& scheduler);
+void StartWallets(CScheduler& scheduler, const ArgsManager& args);
 
 //! Flush all wallets in preparation for shutdown.
 void FlushWallets();
diff --git a/src/wallet/test/init_test_fixture.cpp b/src/wallet/test/init_test_fixture.cpp
index 797a0d634f..35bd965673 100644
--- a/src/wallet/test/init_test_fixture.cpp
+++ b/src/wallet/test/init_test_fixture.cpp
@@ -3,13 +3,14 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <fs.h>
+#include <util/check.h>
 #include <util/system.h>
 
 #include <wallet/test/init_test_fixture.h>
 
-InitWalletDirTestingSetup::InitWalletDirTestingSetup(const std::string& chainName): BasicTestingSetup(chainName)
+InitWalletDirTestingSetup::InitWalletDirTestingSetup(const std::string& chainName) : BasicTestingSetup(chainName)
 {
-    m_chain_client = MakeWalletClient(*m_chain, {});
+    m_chain_client = MakeWalletClient(*m_chain, *Assert(m_node.args), {});
 
     std::string sep;
     sep += fs::path::preferred_separator;
diff --git a/src/wallet/test/wallet_test_fixture.h b/src/wallet/test/wallet_test_fixture.h
index 6c32868b1e..99d7cfe921 100644
--- a/src/wallet/test/wallet_test_fixture.h
+++ b/src/wallet/test/wallet_test_fixture.h
@@ -10,17 +10,18 @@
 #include <interfaces/chain.h>
 #include <interfaces/wallet.h>
 #include <node/context.h>
+#include <util/check.h>
 #include <wallet/wallet.h>
 
 #include <memory>
 
 /** Testing setup and teardown for wallet.
  */
-struct WalletTestingSetup: public TestingSetup {
+struct WalletTestingSetup : public TestingSetup {
     explicit WalletTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
 
     std::unique_ptr<interfaces::Chain> m_chain = interfaces::MakeChain(m_node);
-    std::unique_ptr<interfaces::ChainClient> m_chain_client = interfaces::MakeWalletClient(*m_chain, {});
+    std::unique_ptr<interfaces::ChainClient> m_chain_client = interfaces::MakeWalletClient(*m_chain, *Assert(m_node.args), {});
     CWallet m_wallet;
     std::unique_ptr<interfaces::Handler> m_chain_notifications_handler;
 };
diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
index 5297c43718..9d53f0df9c 100644
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -952,9 +952,6 @@ void MaybeCompactWalletDB()
     if (fOneThread.exchange(true)) {
         return;
     }
-    if (!gArgs.GetBoolArg("-flushwallet", DEFAULT_FLUSHWALLET)) {
-        return;
-    }
 
     for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
         WalletDatabase& dbh = pwallet->GetDBHandle();