Merge bitcoin/bitcoin#23497: Add src/node/ and src/wallet/ code to node:: and wallet:: namespaces

e5b6aef61221b621ad77b5f075a16897e08835bf Move CBlockFileInfo::ToString method where class is declared (Russell Yanofsky)
f7086fd8ff084ab0dd656d75b7485e59263bdfd8 Add src/wallet/* code to wallet:: namespace (Russell Yanofsky)
90fc8b089d591cabff60ee829a33f96c37fd27ba Add src/node/* code to node:: namespace (Russell Yanofsky)

Pull request description:

  There are no code changes, this is just adding `namespace` and `using` declarations and `node::` or `wallet::` qualifiers in some places.

  Motivations for this change are:

  - To make it easier to see when node and wallet code is being accessed places where it shouldn't be. For example if GUI code is accessing node and wallet internals or if wallet and node code are referencing each other.
  - To make source code organization clearer ([#15732](https://github.com/bitcoin/bitcoin/issues/15732)), being able to know that `wallet::` code is in `src/wallet/`, `node::` code is in `src/node/`, `init::` code is in `src/init/`, `util::` code is in `src/util/`, etc.

  Reviewing with `git log -p -n1 -U0 --word-diff-regex=.` can be helpful to verify this is only updating declarations, not changing code.

ACKs for top commit:
  achow101:
    ACK e5b6aef61221b621ad77b5f075a16897e08835bf
  MarcoFalke:
    Concept ACK e5b6aef61221b621ad77b5f075a16897e08835bf 🍨

Tree-SHA512: 3797745c90246794e2d55a2ee6e8b0ad5c811e4e03a242d3fdfeb68032f8787f0d48ed4097f6b7730f540220c0af99ef423cd9dbe7f76b2ec12e769a757a2c8d

src/bench/coin_selection.cpp

@@ -11,6 +11,19 @@
 
 #include <set>
 
+using node::NodeContext;
+using wallet::AttemptSelection;
+using wallet::CInputCoin;
+using wallet::COutput;
+using wallet::CWallet;
+using wallet::CWalletTx;
+using wallet::CoinEligibilityFilter;
+using wallet::CoinSelectionParams;
+using wallet::CreateDummyWalletDatabase;
+using wallet::OutputGroup;
+using wallet::SelectCoinsBnB;
+using wallet::TxStateInactive;
+
 static void addCoin(const CAmount& nValue, const CWallet& wallet, std::vector<std::unique_ptr<CWalletTx>>& wtxs)
 {
     static int nextLockTime = 0;

src/bench/wallet_balance.cpp

@@ -14,6 +14,12 @@
 
 #include <optional>
 
+using wallet::CWallet;
+using wallet::CreateMockWalletDatabase;
+using wallet::DBErrors;
+using wallet::GetBalance;
+using wallet::WALLET_FLAG_DESCRIPTORS;
+
 static void WalletBalance(benchmark::Bench& bench, const bool set_dirty, const bool add_mine)
 {
     const auto test_setup = MakeNoLogFileContext<const TestingSetup>();

src/bitcoin-wallet.cpp

@@ -123,7 +123,7 @@ int main(int argc, char* argv[])
 
     ECCVerifyHandle globalVerifyHandle;
     ECC_Start();
-    if (!WalletTool::ExecuteWalletToolFunc(args, command->command)) {
+    if (!wallet::WalletTool::ExecuteWalletToolFunc(args, command->command)) {
         return EXIT_FAILURE;
     }
     ECC_Stop();

src/bitcoind.cpp

@@ -30,6 +30,8 @@
 #include <functional>
 #include <optional>
 
+using node::NodeContext;
+
 const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
 UrlDecodeFn* const URL_DECODE = urlDecode;
 

src/chain.cpp

@@ -4,6 +4,12 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chain.h>
+#include <util/time.h>
+
+std::string CBlockFileInfo::ToString() const
+{
+    return strprintf("CBlockFileInfo(blocks=%u, size=%u, heights=%u...%u, time=%s...%s)", nBlocks, nSize, nHeightFirst, nHeightLast, FormatISO8601Date(nTimeFirst), FormatISO8601Date(nTimeLast));
+}
 
 void CChain::SetTip(CBlockIndex *pindex) {
     if (pindex == nullptr) {

src/dummywallet.cpp

@@ -6,7 +6,6 @@
 #include <walletinitinterface.h>
 
 class ArgsManager;
-class CWallet;
 
 namespace interfaces {
 class Chain;
@@ -21,7 +20,7 @@ public:
     bool HasWalletSupport() const override {return false;}
     void AddWalletOptions(ArgsManager& argsman) const override;
     bool ParameterInteraction() const override {return true;}
-    void Construct(NodeContext& node) const override {LogPrintf("No wallet support compiled in!\n");}
+    void Construct(node::NodeContext& node) const override {LogPrintf("No wallet support compiled in!\n");}
 };
 
 void DummyWalletInit::AddWalletOptions(ArgsManager& argsman) const
@@ -59,11 +58,6 @@ const WalletInitInterface& g_wallet_init_interface = DummyWalletInit();
 
 namespace interfaces {
 
-std::unique_ptr<Wallet> MakeWallet(const std::shared_ptr<CWallet>& wallet)
-{
-    throw std::logic_error("Wallet function called in non-wallet build.");
-}
-
 std::unique_ptr<WalletLoader> MakeWalletLoader(Chain& chain, ArgsManager& args)
 {
     throw std::logic_error("Wallet function called in non-wallet build.");

src/index/base.cpp

@@ -14,6 +14,8 @@
 #include <validation.h> // For g_chainman
 #include <warnings.h>
 
+using node::ReadBlockFromDisk;
+
 constexpr uint8_t DB_BEST_BLOCK{'B'};
 
 constexpr int64_t SYNC_LOG_INTERVAL = 30; // seconds

src/index/blockfilterindex.cpp

@@ -9,6 +9,8 @@
 #include <node/blockstorage.h>
 #include <util/system.h>
 
+using node::UndoReadFromDisk;
+
 /* The index database stores three items for each block: the disk location of the encoded filter,
  * its dSHA256 hash, and the header. Those belonging to blocks on the active chain are indexed by
  * height, and those belonging to blocks that have been reorganized out of the active chain are

src/index/coinstatsindex.cpp

@@ -12,6 +12,12 @@
 #include <undo.h>
 #include <validation.h>
 
+using node::CCoinsStats;
+using node::GetBogoSize;
+using node::ReadBlockFromDisk;
+using node::TxOutSer;
+using node::UndoReadFromDisk;
+
 static constexpr uint8_t DB_BLOCK_HASH{'s'};
 static constexpr uint8_t DB_BLOCK_HEIGHT{'t'};
 static constexpr uint8_t DB_MUHASH{'M'};

src/index/coinstatsindex.h

@@ -52,7 +52,7 @@ public:
     explicit CoinStatsIndex(size_t n_cache_size, bool f_memory = false, bool f_wipe = false);
 
     // Look up stats for a specific block using CBlockIndex
-    bool LookUpStats(const CBlockIndex* block_index, CCoinsStats& coins_stats) const;
+    bool LookUpStats(const CBlockIndex* block_index, node::CCoinsStats& coins_stats) const;
 };
 
 /// The global UTXO set hash object.

src/index/txindex.cpp

@@ -9,6 +9,8 @@
 #include <util/system.h>
 #include <validation.h>
 
+using node::OpenBlockFile;
+
 constexpr uint8_t DB_TXINDEX{'t'};
 
 std::unique_ptr<TxIndex> g_txindex;

src/init.cpp

@@ -95,6 +95,22 @@
 #include <zmq/zmqrpc.h>
 #endif
 
+using node::CacheSizes;
+using node::CalculateCacheSizes;
+using node::ChainstateLoadVerifyError;
+using node::ChainstateLoadingError;
+using node::CleanupBlockRevFiles;
+using node::DEFAULT_PRINTPRIORITY;
+using node::DEFAULT_STOPAFTERBLOCKIMPORT;
+using node::LoadChainstate;
+using node::NodeContext;
+using node::ThreadImport;
+using node::VerifyLoadedChainstate;
+using node::fHavePruned;
+using node::fPruneMode;
+using node::fReindex;
+using node::nPruneTarget;
+
 static const bool DEFAULT_PROXYRANDOMIZE = true;
 static const bool DEFAULT_REST_ENABLE = false;
 

src/init.h

@@ -16,14 +16,16 @@ static constexpr bool DEFAULT_DAEMON = false;
 static constexpr bool DEFAULT_DAEMONWAIT = false;
 
 class ArgsManager;
-struct NodeContext;
 namespace interfaces {
 struct BlockAndHeaderTipInfo;
 }
+namespace node {
+struct NodeContext;
+} // namespace node
 
 /** Interrupt threads */
-void Interrupt(NodeContext& node);
+void Interrupt(node::NodeContext& node);
-void Shutdown(NodeContext& node);
+void Shutdown(node::NodeContext& node);
 //!Initialize the logging infrastructure
 void InitLogging(const ArgsManager& args);
 //!Parameter interaction: change current parameters depending on various rules
@@ -55,13 +57,13 @@ bool AppInitLockDataDirectory();
 /**
  * Initialize node and wallet interface pointers. Has no prerequisites or side effects besides allocating memory.
  */
-bool AppInitInterfaces(NodeContext& node);
+bool AppInitInterfaces(node::NodeContext& node);
 /**
  * Bitcoin core main initialization.
  * @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(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info = nullptr);
+bool AppInitMain(node::NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info = nullptr);
 
 /**
  * Register all arguments with the ArgsManager

src/init/bitcoin-gui.cpp

@@ -33,7 +33,7 @@ public:
     }
     std::unique_ptr<interfaces::Echo> makeEcho() override { return interfaces::MakeEcho(); }
     interfaces::Ipc* ipc() override { return m_ipc.get(); }
-    NodeContext m_node;
+    node::NodeContext m_node;
     std::unique_ptr<interfaces::Ipc> m_ipc;
 };
 } // namespace

src/init/bitcoin-node.cpp

@@ -20,7 +20,7 @@ const char* EXE_NAME = "bitcoin-node";
 class BitcoinNodeInit : public interfaces::Init
 {
 public:
-    BitcoinNodeInit(NodeContext& node, const char* arg0)
+    BitcoinNodeInit(node::NodeContext& node, const char* arg0)
         : m_node(node),
           m_ipc(interfaces::MakeIpc(EXE_NAME, arg0, *this))
     {
@@ -35,14 +35,14 @@ public:
     }
     std::unique_ptr<interfaces::Echo> makeEcho() override { return interfaces::MakeEcho(); }
     interfaces::Ipc* ipc() override { return m_ipc.get(); }
-    NodeContext& m_node;
+    node::NodeContext& m_node;
     std::unique_ptr<interfaces::Ipc> m_ipc;
 };
 } // namespace
 } // namespace init
 
 namespace interfaces {
-std::unique_ptr<Init> MakeNodeInit(NodeContext& node, int argc, char* argv[], int& exit_status)
+std::unique_ptr<Init> MakeNodeInit(node::NodeContext& node, int argc, char* argv[], int& exit_status)
 {
     auto init = std::make_unique<init::BitcoinNodeInit>(node, argc > 0 ? argv[0] : "");
     // Check if bitcoin-node is being invoked as an IPC server. If so, then

src/init/bitcoin-qt.cpp

@@ -29,7 +29,7 @@ public:
         return MakeWalletLoader(chain, *Assert(m_node.args));
     }
     std::unique_ptr<interfaces::Echo> makeEcho() override { return interfaces::MakeEcho(); }
-    NodeContext m_node;
+    node::NodeContext m_node;
 };
 } // namespace
 } // namespace init

src/init/bitcoind.cpp

@@ -12,6 +12,8 @@
 
 #include <memory>
 
+using node::NodeContext;
+
 namespace init {
 namespace {
 class BitcoindInit : public interfaces::Init

src/interfaces/chain.h

@@ -28,7 +28,9 @@ enum class RBFTransactionState;
 struct bilingual_str;
 struct CBlockLocator;
 struct FeeCalculation;
+namespace node {
 struct NodeContext;
+} // namespace node
 
 namespace interfaces {
 
@@ -316,7 +318,7 @@ public:
 };
 
 //! Return implementation of Chain interface.
-std::unique_ptr<Chain> MakeChain(NodeContext& node);
+std::unique_ptr<Chain> MakeChain(node::NodeContext& node);
 
 } // namespace interfaces
 

src/interfaces/init.h

@@ -7,7 +7,9 @@
 
 #include <memory>
 
+namespace node {
 struct NodeContext;
+} // namespace node
 
 namespace interfaces {
 class Chain;
@@ -40,7 +42,7 @@ public:
 //! status code to exit with. If this returns non-null, the caller can start up
 //! normally and use the Init object to spawn and connect to other processes
 //! while it is running.
-std::unique_ptr<Init> MakeNodeInit(NodeContext& node, int argc, char* argv[], int& exit_status);
+std::unique_ptr<Init> MakeNodeInit(node::NodeContext& node, int argc, char* argv[], int& exit_status);
 
 //! Return implementation of Init interface for the wallet process.
 std::unique_ptr<Init> MakeWalletInit(int argc, char* argv[], int& exit_status);

src/interfaces/node.h

@@ -22,7 +22,6 @@
 #include <vector>
 
 class BanMan;
-class CCoinControl;
 class CFeeRate;
 class CNodeStats;
 class Coin;
@@ -32,8 +31,13 @@ class proxyType;
 enum class SynchronizationState;
 enum class TransactionError;
 struct CNodeStateStats;
-struct NodeContext;
 struct bilingual_str;
+namespace node {
+struct NodeContext;
+} // namespace node
+namespace wallet {
+class CCoinControl;
+} // namespace wallet
 
 namespace interfaces {
 class Handler;
@@ -242,12 +246,12 @@ public:
 
     //! Get and set internal node context. Useful for testing, but not
     //! accessible across processes.
-    virtual NodeContext* context() { return nullptr; }
+    virtual node::NodeContext* context() { return nullptr; }
-    virtual void setContext(NodeContext* context) { }
+    virtual void setContext(node::NodeContext* context) { }
 };
 
 //! Return implementation of Node interface.
-std::unique_ptr<Node> MakeNode(NodeContext& context);
+std::unique_ptr<Node> MakeNode(node::NodeContext& context);
 
 //! Block tip (could be a header or not, depends on the subscribed signal).
 struct BlockTip {

src/interfaces/wallet.h

@@ -24,19 +24,21 @@
 #include <utility>
 #include <vector>
 
-class CCoinControl;
 class CFeeRate;
 class CKey;
-class CWallet;
 enum class FeeReason;
 enum class OutputType;
 enum class TransactionError;
+struct PartiallySignedTransaction;
+struct bilingual_str;
+namespace wallet {
+class CCoinControl;
+class CWallet;
 enum isminetype : unsigned int;
 struct CRecipient;
-struct PartiallySignedTransaction;
 struct WalletContext;
-struct bilingual_str;
 using isminefilter = std::underlying_type<isminetype>::type;
+} // namespace wallet
 
 namespace interfaces {
 
@@ -108,7 +110,7 @@ public:
     //! Look up address in wallet, return whether exists.
     virtual bool getAddress(const CTxDestination& dest,
         std::string* name,
-        isminetype* is_mine,
+        wallet::isminetype* is_mine,
         std::string* purpose) = 0;
 
     //! Get wallet address list.
@@ -136,8 +138,8 @@ public:
     virtual void listLockedCoins(std::vector<COutPoint>& outputs) = 0;
 
     //! Create transaction.
-    virtual CTransactionRef createTransaction(const std::vector<CRecipient>& recipients,
+    virtual CTransactionRef createTransaction(const std::vector<wallet::CRecipient>& recipients,
-        const CCoinControl& coin_control,
+        const wallet::CCoinControl& coin_control,
         bool sign,
         int& change_pos,
         CAmount& fee,
@@ -159,7 +161,7 @@ public:
 
     //! Create bump transaction.
     virtual bool createBumpTransaction(const uint256& txid,
-        const CCoinControl& coin_control,
+        const wallet::CCoinControl& coin_control,
         std::vector<bilingual_str>& errors,
         CAmount& old_fee,
         CAmount& new_fee,
@@ -214,19 +216,19 @@ public:
     virtual CAmount getBalance() = 0;
 
     //! Get available balance.
-    virtual CAmount getAvailableBalance(const CCoinControl& coin_control) = 0;
+    virtual CAmount getAvailableBalance(const wallet::CCoinControl& coin_control) = 0;
 
     //! Return whether transaction input belongs to wallet.
-    virtual isminetype txinIsMine(const CTxIn& txin) = 0;
+    virtual wallet::isminetype txinIsMine(const CTxIn& txin) = 0;
 
     //! Return whether transaction output belongs to wallet.
-    virtual isminetype txoutIsMine(const CTxOut& txout) = 0;
+    virtual wallet::isminetype txoutIsMine(const CTxOut& txout) = 0;
 
     //! Return debit amount if transaction input belongs to wallet.
-    virtual CAmount getDebit(const CTxIn& txin, isminefilter filter) = 0;
+    virtual CAmount getDebit(const CTxIn& txin, wallet::isminefilter filter) = 0;
 
     //! Return credit amount if transaction input belongs to wallet.
-    virtual CAmount getCredit(const CTxOut& txout, isminefilter filter) = 0;
+    virtual CAmount getCredit(const CTxOut& txout, wallet::isminefilter filter) = 0;
 
     //! Return AvailableCoins + LockedCoins grouped by wallet address.
     //! (put change in one group with wallet address)
@@ -241,7 +243,7 @@ public:
 
     //! Get minimum fee.
     virtual CAmount getMinimumFee(unsigned int tx_bytes,
-        const CCoinControl& coin_control,
+        const wallet::CCoinControl& coin_control,
         int* returned_target,
         FeeReason* reason) = 0;
 
@@ -308,7 +310,7 @@ public:
     virtual std::unique_ptr<Handler> handleCanGetAddressesChanged(CanGetAddressesChangedFn fn) = 0;
 
     //! Return pointer to internal wallet class, useful for testing.
-    virtual CWallet* wallet() { return nullptr; }
+    virtual wallet::CWallet* wallet() { return nullptr; }
 };
 
 //! Wallet chain client that in addition to having chain client methods for
@@ -342,18 +344,18 @@ public:
    virtual std::unique_ptr<Handler> handleLoadWallet(LoadWalletFn fn) = 0;
 
    //! Return pointer to internal context, useful for testing.
-   virtual WalletContext* context() { return nullptr; }
+   virtual wallet::WalletContext* context() { return nullptr; }
 };
 
 //! Information about one wallet address.
 struct WalletAddress
 {
     CTxDestination dest;
-    isminetype is_mine;
+    wallet::isminetype is_mine;
     std::string name;
     std::string purpose;
 
-    WalletAddress(CTxDestination dest, isminetype is_mine, std::string name, std::string purpose)
+    WalletAddress(CTxDestination dest, wallet::isminetype is_mine, std::string name, std::string purpose)
         : dest(std::move(dest)), is_mine(is_mine), name(std::move(name)), purpose(std::move(purpose))
     {
     }
@@ -383,10 +385,10 @@ struct WalletBalances
 struct WalletTx
 {
     CTransactionRef tx;
-    std::vector<isminetype> txin_is_mine;
+    std::vector<wallet::isminetype> txin_is_mine;
-    std::vector<isminetype> txout_is_mine;
+    std::vector<wallet::isminetype> txout_is_mine;
     std::vector<CTxDestination> txout_address;
-    std::vector<isminetype> txout_address_is_mine;
+    std::vector<wallet::isminetype> txout_address_is_mine;
     CAmount credit;
     CAmount debit;
     CAmount change;
@@ -421,7 +423,7 @@ struct WalletTxOut
 
 //! Return implementation of Wallet interface. This function is defined in
 //! dummywallet.cpp and throws if the wallet component is not compiled.
-std::unique_ptr<Wallet> MakeWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet);
+std::unique_ptr<Wallet> MakeWallet(wallet::WalletContext& context, const std::shared_ptr<wallet::CWallet>& wallet);
 
 //! Return implementation of ChainClient interface for a wallet loader. This
 //! function will be undefined in builds where ENABLE_WALLET is false.

src/net_processing.cpp

@@ -45,6 +45,12 @@
 #include <optional>
 #include <typeinfo>
 
+using node::ReadBlockFromDisk;
+using node::ReadRawBlockFromDisk;
+using node::fImporting;
+using node::fPruneMode;
+using node::fReindex;
+
 /** How long to cache transactions in mapRelay for normal relay */
 static constexpr auto RELAY_TX_CACHE_TIME = 15min;
 /** How long a transaction has to be in the mempool before it can unconditionally be relayed (even when not in mapRelay). */

src/node/blockstorage.cpp

@@ -21,6 +21,7 @@
 #include <util/system.h>
 #include <validation.h>
 
+namespace node {
 std::atomic_bool fImporting(false);
 std::atomic_bool fReindex(false);
 bool fHavePruned = false;
@@ -474,11 +475,6 @@ void CleanupBlockRevFiles()
     }
 }
 
-std::string CBlockFileInfo::ToString() const
-{
-    return strprintf("CBlockFileInfo(blocks=%u, size=%u, heights=%u...%u, time=%s...%s)", nBlocks, nSize, nHeightFirst, nHeightLast, FormatISO8601Date(nTimeFirst), FormatISO8601Date(nTimeLast));
-}
-
 CBlockFileInfo* BlockManager::GetBlockFileInfo(size_t n)
 {
     LOCK(cs_LastBlockFile);
@@ -940,3 +936,4 @@ void ThreadImport(ChainstateManager& chainman, std::vector<fs::path> vImportFile
     } // End scope of CImportingNow
     chainman.ActiveChainstate().LoadMempool(args);
 }
+} // namespace node

src/node/blockstorage.h

@@ -29,6 +29,7 @@ namespace Consensus {
 struct Params;
 }
 
+namespace node {
 static constexpr bool DEFAULT_STOPAFTERBLOCKIMPORT{false};
 
 /** The pre-allocation chunk size for blk?????.dat files (since 0.8) */
@@ -185,5 +186,6 @@ bool ReadRawBlockFromDisk(std::vector<uint8_t>& block, const CBlockIndex* pindex
 bool UndoReadFromDisk(CBlockUndo& blockundo, const CBlockIndex* pindex);
 
 void ThreadImport(ChainstateManager& chainman, std::vector<fs::path> vImportFiles, const ArgsManager& args);
+} // namespace node
 
 #endif // BITCOIN_NODE_BLOCKSTORAGE_H

src/node/caches.cpp

@@ -8,6 +8,7 @@
 #include <util/system.h>
 #include <validation.h>
 
+namespace node {
 CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)
 {
     int64_t nTotalCache = (args.GetIntArg("-dbcache", nDefaultDbCache) << 20);
@@ -30,3 +31,4 @@ CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)
     sizes.coins = nTotalCache; // the rest goes to in-memory cache
     return sizes;
 }
+} // namespace node

src/node/caches.h

@@ -10,6 +10,7 @@
 
 class ArgsManager;
 
+namespace node {
 struct CacheSizes {
     int64_t block_tree_db;
     int64_t coins_db;
@@ -18,5 +19,6 @@ struct CacheSizes {
     int64_t filter_index;
 };
 CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes = 0);
+} // namespace node
 
 #endif // BITCOIN_NODE_CACHES_H

src/node/chainstate.cpp

@@ -8,6 +8,7 @@
 #include <node/blockstorage.h>
 #include <validation.h>
 
+namespace node {
 std::optional<ChainstateLoadingError> LoadChainstate(bool fReset,
                                                      ChainstateManager& chainman,
                                                      CTxMemPool* mempool,
@@ -156,3 +157,4 @@ std::optional<ChainstateLoadVerifyError> VerifyLoadedChainstate(ChainstateManage
 
     return std::nullopt;
 }
+} // namespace node

src/node/chainstate.h

@@ -10,11 +10,12 @@
 #include <optional>
 
 class ChainstateManager;
+class CTxMemPool;
 namespace Consensus {
 struct Params;
-}
+} // namespace Consensus
-class CTxMemPool;
 
+namespace node {
 enum class ChainstateLoadingError {
     ERROR_LOADING_BLOCK_DB,
     ERROR_BAD_GENESIS_BLOCK,
@@ -81,5 +82,6 @@ std::optional<ChainstateLoadVerifyError> VerifyLoadedChainstate(ChainstateManage
                                                                 unsigned int check_blocks,
                                                                 unsigned int check_level,
                                                                 std::function<int64_t()> get_unix_time_seconds);
+} // namespace node
 
 #endif // BITCOIN_NODE_CHAINSTATE_H

src/node/coin.cpp

@@ -8,6 +8,7 @@
 #include <txmempool.h>
 #include <validation.h>
 
+namespace node {
 void FindCoins(const NodeContext& node, std::map<COutPoint, Coin>& coins)
 {
     assert(node.mempool);
@@ -22,3 +23,4 @@ void FindCoins(const NodeContext& node, std::map<COutPoint, Coin>& coins)
         }
     }
 }
+} // namespace node

src/node/coin.h

@@ -9,6 +9,8 @@
 
 class COutPoint;
 class Coin;
+
+namespace node {
 struct NodeContext;
 
 /**
@@ -19,6 +21,7 @@ struct NodeContext;
  * @param[in] node The node context to use for lookup
  * @param[in,out] coins map to fill
  */
-void FindCoins(const NodeContext& node, std::map<COutPoint, Coin>& coins);
+void FindCoins(const node::NodeContext& node, std::map<COutPoint, Coin>& coins);
+} // namespace node
 
 #endif // BITCOIN_NODE_COIN_H

src/node/coinstats.cpp

@@ -17,6 +17,7 @@
 
 #include <map>
 
+namespace node {
 // Database-independent metric indicating the UTXO set size
 uint64_t GetBogoSize(const CScript& script_pub_key)
 {
@@ -181,3 +182,4 @@ static void FinalizeHash(MuHash3072& muhash, CCoinsStats& stats)
     stats.hashSerialized = out;
 }
 static void FinalizeHash(std::nullptr_t, CCoinsStats& stats) {}
+} // namespace node

src/node/coinstats.h

@@ -15,9 +15,12 @@
 #include <cstdint>
 #include <functional>
 
-class BlockManager;
 class CCoinsView;
+namespace node {
+class BlockManager;
+} // namespace node
 
+namespace node {
 enum class CoinStatsHashType {
     HASH_SERIALIZED,
     MUHASH,
@@ -71,10 +74,11 @@ struct CCoinsStats {
 };
 
 //! Calculate statistics about the unspent transaction output set
-bool GetUTXOStats(CCoinsView* view, BlockManager& blockman, CCoinsStats& stats, const std::function<void()>& interruption_point = {}, const CBlockIndex* pindex = nullptr);
+bool GetUTXOStats(CCoinsView* view, node::BlockManager& blockman, CCoinsStats& stats, const std::function<void()>& interruption_point = {}, const CBlockIndex* pindex = nullptr);
 
 uint64_t GetBogoSize(const CScript& script_pub_key);
 
 CDataStream TxOutSer(const COutPoint& outpoint, const Coin& coin);
+} // namespace node
 
 #endif // BITCOIN_NODE_COINSTATS_H

src/node/context.cpp

@@ -14,5 +14,7 @@
 #include <txmempool.h>
 #include <validation.h>
 
+namespace node {
 NodeContext::NodeContext() {}
 NodeContext::~NodeContext() {}
+} // namespace node

src/node/context.h

@@ -26,6 +26,7 @@ class Init;
 class WalletLoader;
 } // namespace interfaces
 
+namespace node {
 //! NodeContext struct containing references to chain state and connection
 //! state.
 //!
@@ -62,5 +63,6 @@ struct NodeContext {
     NodeContext();
     ~NodeContext();
 };
+} // namespace node
 
 #endif // BITCOIN_NODE_CONTEXT_H

src/node/interfaces.cpp

@@ -249,8 +249,8 @@ public:
     bool isInitialBlockDownload() override {
         return chainman().ActiveChainstate().IsInitialBlockDownload();
     }
-    bool getReindex() override { return ::fReindex; }
+    bool getReindex() override { return node::fReindex; }
-    bool getImporting() override { return ::fImporting; }
+    bool getImporting() override { return node::fImporting; }
     void setNetworkActive(bool active) override
     {
         if (m_context->connman) {
@@ -649,9 +649,9 @@ public:
     bool havePruned() override
     {
         LOCK(cs_main);
-        return ::fHavePruned;
+        return node::fHavePruned;
     }
-    bool isReadyToBroadcast() override { return !::fImporting && !::fReindex && !isInitialBlockDownload(); }
+    bool isReadyToBroadcast() override { return !node::fImporting && !node::fReindex && !isInitialBlockDownload(); }
     bool isInitialBlockDownload() override {
         return chainman().ActiveChainstate().IsInitialBlockDownload();
     }
@@ -729,6 +729,6 @@ public:
 } // namespace node
 
 namespace interfaces {
-std::unique_ptr<Node> MakeNode(NodeContext& context) { return std::make_unique<node::NodeImpl>(context); }
+std::unique_ptr<Node> MakeNode(node::NodeContext& context) { return std::make_unique<node::NodeImpl>(context); }
-std::unique_ptr<Chain> MakeChain(NodeContext& context) { return std::make_unique<node::ChainImpl>(context); }
+std::unique_ptr<Chain> MakeChain(node::NodeContext& context) { return std::make_unique<node::ChainImpl>(context); }
 } // namespace interfaces

src/node/miner.cpp

@@ -26,6 +26,7 @@
 #include <algorithm>
 #include <utility>
 
+namespace node {
 int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev)
 {
     int64_t nOldTime = pblock->nTime;
@@ -464,3 +465,4 @@ void IncrementExtraNonce(CBlock* pblock, const CBlockIndex* pindexPrev, unsigned
     pblock->vtx[0] = MakeTransactionRef(std::move(txCoinbase));
     pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
 }
+} // namespace node

src/node/miner.h

@@ -23,6 +23,7 @@ class CScript;
 
 namespace Consensus { struct Params; };
 
+namespace node {
 static const bool DEFAULT_PRINTPRIORITY = false;
 
 struct CBlockTemplate
@@ -206,5 +207,6 @@ int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParam
 
 /** Update an old GenerateCoinbaseCommitment from CreateNewBlock after the block txs have changed */
 void RegenerateCommitments(CBlock& block, ChainstateManager& chainman);
+} // namespace node
 
 #endif // BITCOIN_NODE_MINER_H

src/node/minisketchwrapper.cpp

@@ -16,6 +16,7 @@
 #include <utility>
 #include <vector>
 
+namespace node {
 namespace {
 
 static constexpr uint32_t BITS = 32;
@@ -75,3 +76,4 @@ Minisketch MakeMinisketch32FP(size_t max_elements, uint32_t fpbits)
 {
     return Minisketch::CreateFP(BITS, Minisketch32Implementation(), max_elements, fpbits);
 }
+} // namespace node

src/node/minisketchwrapper.h

@@ -10,9 +10,11 @@
 #include <cstddef>
 #include <cstdint>
 
+namespace node {
 /** Wrapper around Minisketch::Minisketch(32, implementation, capacity). */
 Minisketch MakeMinisketch32(size_t capacity);
 /** Wrapper around Minisketch::CreateFP. */
 Minisketch MakeMinisketch32FP(size_t max_elements, uint32_t fpbits);
+} // namespace node
 
 #endif // BITCOIN_NODE_MINISKETCHWRAPPER_H

src/node/psbt.cpp

@@ -12,6 +12,7 @@
 
 #include <numeric>
 
+namespace node {
 PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx)
 {
     // Go through each input and build status
@@ -147,3 +148,4 @@ PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx)
 
     return result;
 }
+} // namespace node

src/node/psbt.h

@@ -9,6 +9,7 @@
 
 #include <optional>
 
+namespace node {
 /**
  * Holds an analysis of one input from a PSBT
  */
@@ -52,5 +53,6 @@ struct PSBTAnalysis {
  * @return A PSBTAnalysis with information about the provided PSBT.
  */
 PSBTAnalysis AnalyzePSBT(PartiallySignedTransaction psbtx);
+} // namespace node
 
 #endif // BITCOIN_NODE_PSBT_H

src/node/transaction.cpp

@@ -16,6 +16,7 @@
 
 #include <future>
 
+namespace node {
 static TransactionError HandleATMPError(const TxValidationState& state, std::string& err_string_out)
 {
     err_string_out = state.ToString();
@@ -153,3 +154,4 @@ CTransactionRef GetTransaction(const CBlockIndex* const block_index, const CTxMe
     }
     return nullptr;
 }
+} // namespace node

src/node/transaction.h

@@ -12,11 +12,13 @@
 
 class CBlockIndex;
 class CTxMemPool;
-struct NodeContext;
 namespace Consensus {
 struct Params;
 }
 
+namespace node {
+struct NodeContext;
+
 /** Maximum fee rate for sendrawtransaction and testmempoolaccept RPC calls.
  * Also used by the GUI when broadcasting a completed PSBT.
  * By default, a transaction with a fee rate higher than this will be rejected
@@ -57,5 +59,6 @@ static const CFeeRate DEFAULT_MAX_RAW_TX_FEE_RATE{COIN / 10};
  * @returns                    The tx if found, otherwise nullptr
  */
 CTransactionRef GetTransaction(const CBlockIndex* const block_index, const CTxMemPool* const mempool, const uint256& hash, const Consensus::Params& consensusParams, uint256& hashBlock);
+} // namespace node
 
 #endif // BITCOIN_NODE_TRANSACTION_H

src/node/utxo_snapshot.h

@@ -9,6 +9,7 @@
 #include <uint256.h>
 #include <serialize.h>
 
+namespace node {
 //! Metadata describing a serialized version of a UTXO set from which an
 //! assumeutxo CChainState can be constructed.
 class SnapshotMetadata
@@ -32,5 +33,6 @@ public:
 
     SERIALIZE_METHODS(SnapshotMetadata, obj) { READWRITE(obj.m_base_blockhash, obj.m_coins_count); }
 };
+} // namespace node
 
 #endif // BITCOIN_NODE_UTXO_SNAPSHOT_H

src/qt/bitcoin.cpp

@@ -76,6 +76,8 @@ Q_DECLARE_METATYPE(CAmount)
 Q_DECLARE_METATYPE(SynchronizationState)
 Q_DECLARE_METATYPE(uint256)
 
+using node::NodeContext;
+
 static void RegisterMetaTypes()
 {
     // Register meta types used for QMetaObject::invokeMethod and Qt::QueuedConnection

src/qt/coincontroldialog.cpp

@@ -31,6 +31,9 @@
 #include <QSettings>
 #include <QTreeWidget>
 
+using wallet::CCoinControl;
+using wallet::MIN_CHANGE;
+
 QList<CAmount> CoinControlDialog::payAmounts;
 bool CoinControlDialog::fSubtractFeeFromAmount = false;
 

src/qt/coincontroldialog.h

@@ -19,7 +19,9 @@
 class PlatformStyle;
 class WalletModel;
 
+namespace wallet {
 class CCoinControl;
+} // namespace wallet
 
 namespace Ui {
     class CoinControlDialog;
@@ -42,11 +44,11 @@ class CoinControlDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit CoinControlDialog(CCoinControl& coin_control, WalletModel* model, const PlatformStyle *platformStyle, QWidget *parent = nullptr);
+    explicit CoinControlDialog(wallet::CCoinControl& coin_control, WalletModel* model, const PlatformStyle *platformStyle, QWidget *parent = nullptr);
     ~CoinControlDialog();
 
     // static because also called from sendcoinsdialog
-    static void updateLabels(CCoinControl& m_coin_control, WalletModel*, QDialog*);
+    static void updateLabels(wallet::CCoinControl& m_coin_control, WalletModel*, QDialog*);
 
     static QList<CAmount> payAmounts;
     static bool fSubtractFeeFromAmount;
@@ -56,7 +58,7 @@ protected:
 
 private:
     Ui::CoinControlDialog *ui;
-    CCoinControl& m_coin_control;
+    wallet::CCoinControl& m_coin_control;
     WalletModel *model;
     int sortColumn;
     Qt::SortOrder sortOrder;

src/qt/psbtoperationsdialog.cpp

@@ -17,6 +17,9 @@
 
 #include <iostream>
 
+using node::AnalyzePSBT;
+using node::DEFAULT_MAX_RAW_TX_FEE_RATE;
+using node::PSBTAnalysis;
 
 PSBTOperationsDialog::PSBTOperationsDialog(
     QWidget* parent, WalletModel* wallet_model, ClientModel* client_model) : QDialog(parent, GUIUtil::dialog_flags),

src/qt/sendcoinsdialog.cpp

@@ -35,6 +35,9 @@
 #include <QSettings>
 #include <QTextDocument>
 
+using wallet::CCoinControl;
+using wallet::DEFAULT_PAY_TX_FEE;
+
 static constexpr std::array confTargets{2, 4, 6, 12, 24, 48, 144, 504, 1008};
 int getConfTargetForIndex(int index) {
     if (index+1 > static_cast<int>(confTargets.size())) {

src/qt/sendcoinsdialog.h

@@ -12,12 +12,14 @@
 #include <QString>
 #include <QTimer>
 
-class CCoinControl;
 class ClientModel;
 class PlatformStyle;
 class SendCoinsEntry;
 class SendCoinsRecipient;
 enum class SynchronizationState;
+namespace wallet {
+class CCoinControl;
+} // namespace wallet
 
 namespace Ui {
     class SendCoinsDialog;
@@ -62,7 +64,7 @@ private:
     Ui::SendCoinsDialog *ui;
     ClientModel *clientModel;
     WalletModel *model;
-    std::unique_ptr<CCoinControl> m_coin_control;
+    std::unique_ptr<wallet::CCoinControl> m_coin_control;
     std::unique_ptr<WalletModelTransaction> m_current_transaction;
     bool fNewRecipientAllowed;
     bool fFeeMinimized;

src/qt/test/addressbooktests.cpp

@@ -24,6 +24,13 @@
 #include <QTimer>
 #include <QMessageBox>
 
+using wallet::AddWallet;
+using wallet::CWallet;
+using wallet::CreateMockWalletDatabase;
+using wallet::RemoveWallet;
+using wallet::WALLET_FLAG_DESCRIPTORS;
+using wallet::WalletContext;
+
 namespace
 {
 

src/qt/test/test_main.cpp

@@ -39,6 +39,8 @@ Q_IMPORT_PLUGIN(QAndroidPlatformIntegrationPlugin)
 #endif
 #endif
 
+using node::NodeContext;
+
 const std::function<void(const std::string&)> G_TEST_LOG_FUN{};
 
 // This is all you need to run all the tests

src/qt/test/wallettests.cpp

@@ -39,6 +39,15 @@
 #include <QListView>
 #include <QDialogButtonBox>
 
+using wallet::AddWallet;
+using wallet::CWallet;
+using wallet::CreateMockWalletDatabase;
+using wallet::RemoveWallet;
+using wallet::WALLET_FLAG_DESCRIPTORS;
+using wallet::WalletContext;
+using wallet::WalletDescriptor;
+using wallet::WalletRescanReserver;
+
 namespace
 {
 //! Press "Yes" or "Cancel" buttons in modal send confirmation dialog.

src/qt/transactiondesc.cpp

@@ -28,6 +28,11 @@
 
 #include <QLatin1String>
 
+using wallet::ISMINE_ALL;
+using wallet::ISMINE_SPENDABLE;
+using wallet::ISMINE_WATCH_ONLY;
+using wallet::isminetype;
+
 QString TransactionDesc::FormatTxStatus(const interfaces::WalletTx& wtx, const interfaces::WalletTxStatus& status, bool inMempool, int numBlocks)
 {
     if (!status.is_final)

src/qt/transactionrecord.cpp

@@ -13,6 +13,10 @@
 
 #include <QDateTime>
 
+using wallet::ISMINE_SPENDABLE;
+using wallet::ISMINE_WATCH_ONLY;
+using wallet::isminetype;
+
 /* Return positive answer if transaction should be shown in list.
  */
 bool TransactionRecord::showTransaction()

src/qt/walletcontroller.cpp

@@ -28,6 +28,11 @@
 #include <QTimer>
 #include <QWindow>
 
+using wallet::WALLET_FLAG_BLANK_WALLET;
+using wallet::WALLET_FLAG_DESCRIPTORS;
+using wallet::WALLET_FLAG_DISABLE_PRIVATE_KEYS;
+using wallet::WALLET_FLAG_EXTERNAL_SIGNER;
+
 WalletController::WalletController(ClientModel& client_model, const PlatformStyle* platform_style, QObject* parent)
     : QObject(parent)
     , m_activity_thread(new QThread(this))

src/qt/walletmodel.cpp

@@ -36,6 +36,9 @@
 #include <QSet>
 #include <QTimer>
 
+using wallet::CCoinControl;
+using wallet::CRecipient;
+using wallet::DEFAULT_DISABLE_WALLET;
 
 WalletModel::WalletModel(std::unique_ptr<interfaces::Wallet> wallet, ClientModel& client_model, const PlatformStyle *platformStyle, QObject *parent) :
     QObject(parent),

src/qt/walletmodel.h

@@ -32,16 +32,17 @@ class SendCoinsRecipient;
 class TransactionTableModel;
 class WalletModelTransaction;
 
-class CCoinControl;
 class CKeyID;
 class COutPoint;
-class COutput;
 class CPubKey;
 class uint256;
 
 namespace interfaces {
 class Node;
 } // namespace interfaces
+namespace wallet {
+class CCoinControl;
+} // namespace wallet
 
 QT_BEGIN_NAMESPACE
 class QTimer;
@@ -99,7 +100,7 @@ public:
     };
 
     // prepare transaction for getting txfee before sending coins
-    SendCoinsReturn prepareTransaction(WalletModelTransaction &transaction, const CCoinControl& coinControl);
+    SendCoinsReturn prepareTransaction(WalletModelTransaction &transaction, const wallet::CCoinControl& coinControl);
 
     // Send coins to a list of recipients
     SendCoinsReturn sendCoins(WalletModelTransaction &transaction);

src/rest.cpp

@@ -32,6 +32,11 @@
 
 #include <univalue.h>
 
+using node::GetTransaction;
+using node::IsBlockPruned;
+using node::NodeContext;
+using node::ReadBlockFromDisk;
+
 static const size_t MAX_GETUTXOS_OUTPOINTS = 15; //allow a max of 15 outpoints to be queried at once
 static constexpr unsigned int MAX_REST_HEADERS_RESULTS = 2000;
 

src/rpc/blockchain.cpp

@@ -56,6 +56,16 @@
 #include <memory>
 #include <mutex>
 
+using node::BlockManager;
+using node::CCoinsStats;
+using node::CoinStatsHashType;
+using node::GetUTXOStats;
+using node::IsBlockPruned;
+using node::NodeContext;
+using node::ReadBlockFromDisk;
+using node::SnapshotMetadata;
+using node::UndoReadFromDisk;
+
 struct CUpdatedBlock
 {
     uint256 hash;
@@ -1112,7 +1122,7 @@ static RPCHelpMan pruneblockchain()
                 },
         [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
 {
-    if (!fPruneMode)
+    if (!node::fPruneMode)
         throw JSONRPCError(RPC_MISC_ERROR, "Cannot prune blocks because node is not in prune mode.");
 
     ChainstateManager& chainman = EnsureAnyChainman(request.context);
@@ -1565,8 +1575,8 @@ RPCHelpMan getblockchaininfo()
     obj.pushKV("initialblockdownload",  active_chainstate.IsInitialBlockDownload());
     obj.pushKV("chainwork",             tip->nChainWork.GetHex());
     obj.pushKV("size_on_disk", chainman.m_blockman.CalculateCurrentUsage());
-    obj.pushKV("pruned",                fPruneMode);
+    obj.pushKV("pruned",                node::fPruneMode);
-    if (fPruneMode) {
+    if (node::fPruneMode) {
         const CBlockIndex* block = tip;
         CHECK_NONFATAL(block);
         while (block->pprev && (block->pprev->nStatus & BLOCK_HAVE_DATA)) {
@@ -1579,7 +1589,7 @@ RPCHelpMan getblockchaininfo()
         bool automatic_pruning{args.GetIntArg("-prune", 0) != 1};
         obj.pushKV("automatic_pruning",  automatic_pruning);
         if (automatic_pruning) {
-            obj.pushKV("prune_target_size",  nPruneTarget);
+            obj.pushKV("prune_target_size",  node::nPruneTarget);
         }
     }
 

src/rpc/blockchain.h

@@ -22,7 +22,9 @@ class CBlockIndex;
 class CChainState;
 class CTxMemPool;
 class UniValue;
+namespace node {
 struct NodeContext;
+} // namespace node
 
 static constexpr int NUM_GETBLOCKSTATS_PERCENTILES = 5;
 
@@ -57,7 +59,7 @@ void CalculatePercentilesByWeight(CAmount result[NUM_GETBLOCKSTATS_PERCENTILES],
  * @return a UniValue map containing metadata about the snapshot.
  */
 UniValue CreateUTXOSnapshot(
-    NodeContext& node,
+    node::NodeContext& node,
     CChainState& chainstate,
     CAutoFile& afile,
     const fs::path& path,

src/rpc/mining.cpp

@@ -41,6 +41,13 @@
 #include <memory>
 #include <stdint.h>
 
+using node::BlockAssembler;
+using node::CBlockTemplate;
+using node::IncrementExtraNonce;
+using node::NodeContext;
+using node::RegenerateCommitments;
+using node::UpdateTime;
+
 /**
  * Return average network hashes per second based on the last 'lookup' blocks,
  * or from the last difficulty change if 'lookup' is nonpositive.

src/rpc/misc.cpp

@@ -35,6 +35,8 @@
 
 #include <univalue.h>
 
+using node::NodeContext;
+
 static RPCHelpMan validateaddress()
 {
     return RPCHelpMan{

src/rpc/net.cpp

@@ -32,6 +32,8 @@
 
 #include <univalue.h>
 
+using node::NodeContext;
+
 const std::vector<std::string> CONNECTION_TYPE_DOC{
         "outbound-full-relay (default automatic connections)",
         "block-relay-only (does not relay transactions or addresses)",

src/rpc/rawtransaction.cpp

@@ -45,6 +45,15 @@
 
 #include <univalue.h>
 
+using node::AnalyzePSBT;
+using node::BroadcastTransaction;
+using node::DEFAULT_MAX_RAW_TX_FEE_RATE;
+using node::FindCoins;
+using node::GetTransaction;
+using node::NodeContext;
+using node::PSBTAnalysis;
+using node::ReadBlockFromDisk;
+
 static void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry, CChainState& active_chainstate)
 {
     // Call into TxToUniv() in bitcoin-common to decode the transaction hex.

src/rpc/server_util.cpp

@@ -15,6 +15,8 @@
 
 #include <any>
 
+using node::NodeContext;
+
 NodeContext& EnsureAnyNodeContext(const std::any& context)
 {
     auto node_context = util::AnyPtr<NodeContext>(context);

src/rpc/server_util.h

@@ -13,18 +13,20 @@ class CConnman;
 class CTxMemPool;
 class ChainstateManager;
 class PeerManager;
+namespace node {
 struct NodeContext;
+} // namespace node
 
-NodeContext& EnsureAnyNodeContext(const std::any& context);
+node::NodeContext& EnsureAnyNodeContext(const std::any& context);
-CTxMemPool& EnsureMemPool(const NodeContext& node);
+CTxMemPool& EnsureMemPool(const node::NodeContext& node);
 CTxMemPool& EnsureAnyMemPool(const std::any& context);
-ArgsManager& EnsureArgsman(const NodeContext& node);
+ArgsManager& EnsureArgsman(const node::NodeContext& node);
 ArgsManager& EnsureAnyArgsman(const std::any& context);
-ChainstateManager& EnsureChainman(const NodeContext& node);
+ChainstateManager& EnsureChainman(const node::NodeContext& node);
 ChainstateManager& EnsureAnyChainman(const std::any& context);
-CBlockPolicyEstimator& EnsureFeeEstimator(const NodeContext& node);
+CBlockPolicyEstimator& EnsureFeeEstimator(const node::NodeContext& node);
 CBlockPolicyEstimator& EnsureAnyFeeEstimator(const std::any& context);
-CConnman& EnsureConnman(const NodeContext& node);
+CConnman& EnsureConnman(const node::NodeContext& node);
-PeerManager& EnsurePeerman(const NodeContext& node);
+PeerManager& EnsurePeerman(const node::NodeContext& node);
 
 #endif // BITCOIN_RPC_SERVER_UTIL_H

src/test/blockfilter_index_tests.cpp

@@ -16,6 +16,10 @@
 
 #include <boost/test/unit_test.hpp>
 
+using node::BlockAssembler;
+using node::CBlockTemplate;
+using node::IncrementExtraNonce;
+
 BOOST_AUTO_TEST_SUITE(blockfilter_index_tests)
 
 struct BuildChainTestingSetup : public TestChain100Setup {

src/test/coinstatsindex_tests.cpp

@@ -11,6 +11,8 @@
 
 #include <chrono>
 
+using node::CCoinsStats;
+using node::CoinStatsHashType;
 
 BOOST_AUTO_TEST_SUITE(coinstatsindex_tests)
 

src/test/fuzz/coins_view.cpp

@@ -26,6 +26,10 @@
 #include <string>
 #include <vector>
 
+using node::CCoinsStats;
+using node::CoinStatsHashType;
+using node::GetUTXOStats;
+
 namespace {
 const TestingSetup* g_setup;
 const Coin EMPTY_COIN{};

src/test/fuzz/deserialize.cpp

@@ -33,6 +33,8 @@
 
 #include <test/fuzz/fuzz.h>
 
+using node::SnapshotMetadata;
+
 void initialize_deserialize()
 {
     // Fuzzers using pubkey must hold an ECCVerifyHandle.

src/test/fuzz/minisketch.cpp

@@ -12,6 +12,8 @@
 #include <map>
 #include <numeric>
 
+using node::MakeMinisketch32;
+
 FUZZ_TARGET(minisketch)
 {
     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};

src/test/fuzz/psbt.cpp

@@ -18,6 +18,10 @@
 #include <string>
 #include <vector>
 
+using node::AnalyzePSBT;
+using node::PSBTAnalysis;
+using node::PSBTInputAnalysis;
+
 void initialize_psbt()
 {
     static const ECCVerifyHandle verify_handle;

src/test/fuzz/tx_pool.cpp

@@ -14,6 +14,8 @@
 #include <validation.h>
 #include <validationinterface.h>
 
+using node::BlockAssembler;
+
 namespace {
 
 const TestingSetup* g_setup;

src/test/fuzz/utxo_snapshot.cpp

@@ -13,6 +13,8 @@
 #include <validation.h>
 #include <validationinterface.h>
 
+using node::SnapshotMetadata;
+
 namespace {
 
 const std::vector<std::shared_ptr<CBlock>>* g_chain;

src/test/miner_tests.cpp

@@ -24,6 +24,9 @@
 
 #include <boost/test/unit_test.hpp>
 
+using node::BlockAssembler;
+using node::CBlockTemplate;
+
 namespace miner_tests {
 struct MinerTestingSetup : public TestingSetup {
     void TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs);

src/test/minisketch_tests.cpp

@@ -11,6 +11,8 @@
 
 #include <utility>
 
+using node::MakeMinisketch32;
+
 BOOST_AUTO_TEST_SUITE(minisketch_tests)
 
 BOOST_AUTO_TEST_CASE(minisketch_test)

src/test/util/blockfilter.cpp

@@ -8,6 +8,8 @@
 #include <node/blockstorage.h>
 #include <validation.h>
 
+using node::ReadBlockFromDisk;
+using node::UndoReadFromDisk;
 
 bool ComputeFilter(BlockFilterType filter_type, const CBlockIndex* block_index, BlockFilter& filter)
 {

src/test/util/chainstate.h

@@ -16,7 +16,7 @@
 
 #include <boost/test/unit_test.hpp>
 
-const auto NoMalleation = [](CAutoFile& file, SnapshotMetadata& meta){};
+const auto NoMalleation = [](CAutoFile& file, node::SnapshotMetadata& meta){};
 
 /**
  * Create and activate a UTXO snapshot, optionally providing a function to
@@ -24,7 +24,7 @@ const auto NoMalleation = [](CAutoFile& file, SnapshotMetadata& meta){};
  */
 template<typename F = decltype(NoMalleation)>
 static bool
-CreateAndActivateUTXOSnapshot(NodeContext& node, const fs::path root, F malleation = NoMalleation)
+CreateAndActivateUTXOSnapshot(node::NodeContext& node, const fs::path root, F malleation = NoMalleation)
 {
     // Write out a snapshot to the test's tempdir.
     //
@@ -43,7 +43,7 @@ CreateAndActivateUTXOSnapshot(NodeContext& node, const fs::path root, F malleati
     //
     FILE* infile{fsbridge::fopen(snapshot_path, "rb")};
     CAutoFile auto_infile{infile, SER_DISK, CLIENT_VERSION};
-    SnapshotMetadata metadata;
+    node::SnapshotMetadata metadata;
     auto_infile >> metadata;
 
     malleation(auto_infile, metadata);

src/test/util/mining.cpp

@@ -16,6 +16,9 @@
 #include <validation.h>
 #include <versionbits.h>
 
+using node::BlockAssembler;
+using node::NodeContext;
+
 CTxIn generatetoaddress(const NodeContext& node, const std::string& address)
 {
     const auto dest = DecodeDestination(address);

src/test/util/mining.h

@@ -13,18 +13,20 @@ class CBlock;
 class CChainParams;
 class CScript;
 class CTxIn;
+namespace node {
 struct NodeContext;
+} // namespace node
 
 /** Create a blockchain, starting from genesis */
 std::vector<std::shared_ptr<CBlock>> CreateBlockChain(size_t total_height, const CChainParams& params);
 
 /** Returns the generated coin */
-CTxIn MineBlock(const NodeContext&, const CScript& coinbase_scriptPubKey);
+CTxIn MineBlock(const node::NodeContext&, const CScript& coinbase_scriptPubKey);
 
 /** Prepare a block to be mined */
-std::shared_ptr<CBlock> PrepareBlock(const NodeContext&, const CScript& coinbase_scriptPubKey);
+std::shared_ptr<CBlock> PrepareBlock(const node::NodeContext&, const CScript& coinbase_scriptPubKey);
 
 /** RPC-like helper function, returns the generated coin */
-CTxIn generatetoaddress(const NodeContext&, const std::string& address);
+CTxIn generatetoaddress(const node::NodeContext&, const std::string& address);
 
 #endif // BITCOIN_TEST_UTIL_MINING_H

src/test/util/setup_common.cpp

@@ -43,6 +43,14 @@
 
 #include <functional>
 
+using node::BlockAssembler;
+using node::CalculateCacheSizes;
+using node::LoadChainstate;
+using node::RegenerateCommitments;
+using node::VerifyLoadedChainstate;
+using node::fPruneMode;
+using node::fReindex;
+
 const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
 UrlDecodeFn* const URL_DECODE = nullptr;
 

src/test/util/setup_common.h

@@ -26,11 +26,13 @@
 extern const std::function<void(const std::string&)> G_TEST_LOG_FUN;
 
 // Enable BOOST_CHECK_EQUAL for enum class types
+namespace std {
 template <typename T>
 std::ostream& operator<<(typename std::enable_if<std::is_enum<T>::value, std::ostream>::type& stream, const T& e)
 {
     return stream << static_cast<typename std::underlying_type<T>::type>(e);
 }
+} // namespace std
 
 /**
  * This global and the helpers that use it are not thread-safe.
@@ -76,7 +78,7 @@ static constexpr CAmount CENT{1000000};
  */
 struct BasicTestingSetup {
     ECCVerifyHandle globalVerifyHandle;
-    NodeContext m_node;
+    node::NodeContext m_node;
 
     explicit BasicTestingSetup(const std::string& chainName = CBaseChainParams::MAIN, const std::vector<const char*>& extra_args = {});
     ~BasicTestingSetup();
@@ -90,7 +92,7 @@ struct BasicTestingSetup {
  * initialization behaviour.
  */
 struct ChainTestingSetup : public BasicTestingSetup {
-    CacheSizes m_cache_sizes{};
+    node::CacheSizes m_cache_sizes{};
 
     explicit ChainTestingSetup(const std::string& chainName = CBaseChainParams::MAIN, const std::vector<const char*>& extra_args = {});
     ~ChainTestingSetup();

src/test/util/wallet.cpp

@@ -12,6 +12,8 @@
 #include <wallet/wallet.h>
 #endif
 
+using wallet::CWallet;
+
 const std::string ADDRESS_BCRT1_UNSPENDABLE = "bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj";
 
 #ifdef ENABLE_WALLET

src/test/util/wallet.h

@@ -7,7 +7,9 @@
 
 #include <string>
 
+namespace wallet {
 class CWallet;
+} // namespace wallet
 
 // Constants //
 
@@ -16,9 +18,9 @@ extern const std::string ADDRESS_BCRT1_UNSPENDABLE;
 // RPC-like //
 
 /** Import the address to the wallet */
-void importaddress(CWallet& wallet, const std::string& address);
+void importaddress(wallet::CWallet& wallet, const std::string& address);
 /** Returns a new address from the wallet */
-std::string getnewaddress(CWallet& w);
+std::string getnewaddress(wallet::CWallet& w);
 
 
 #endif // BITCOIN_TEST_UTIL_WALLET_H

src/test/validation_block_tests.cpp

@@ -19,6 +19,8 @@
 
 #include <thread>
 
+using node::BlockAssembler;
+
 namespace validation_block_tests {
 struct MinerTestingSetup : public RegTestingSetup {
     std::shared_ptr<CBlock> Block(const uint256& prev_hash);

src/test/validation_chainstatemanager_tests.cpp

@@ -20,6 +20,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using node::SnapshotMetadata;
+
 BOOST_FIXTURE_TEST_SUITE(validation_chainstatemanager_tests, ChainTestingSetup)
 
 //! Basic tests for ChainstateManager.

src/test/validation_flush_tests.cpp

@@ -9,6 +9,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using node::BlockManager;
+
 BOOST_FIXTURE_TEST_SUITE(validation_flush_tests, ChainTestingSetup)
 
 //! Test utilities for detecting when we need to flush the coins cache based

src/validation.cpp

@@ -62,6 +62,25 @@
 
 #include <boost/algorithm/string/replace.hpp>
 
+using node::BLOCKFILE_CHUNK_SIZE;
+using node::BlockManager;
+using node::BlockMap;
+using node::CBlockIndexWorkComparator;
+using node::CCoinsStats;
+using node::CoinStatsHashType;
+using node::GetUTXOStats;
+using node::OpenBlockFile;
+using node::ReadBlockFromDisk;
+using node::SnapshotMetadata;
+using node::UNDOFILE_CHUNK_SIZE;
+using node::UndoReadFromDisk;
+using node::UnlinkPrunedFiles;
+using node::fHavePruned;
+using node::fImporting;
+using node::fPruneMode;
+using node::fReindex;
+using node::nPruneTarget;
+
 #define MICRO 0.000001
 #define MILLI 0.001
 

src/validation.h

@@ -43,12 +43,14 @@ class CBlockTreeDB;
 class CChainParams;
 class CTxMemPool;
 class ChainstateManager;
-class SnapshotMetadata;
 struct ChainTxData;
 struct DisconnectedBlockTransactions;
 struct PrecomputedTransactionData;
 struct LockPoints;
 struct AssumeutxoData;
+namespace node {
+class SnapshotMetadata;
+} // namespace node
 
 /** Default for -minrelaytxfee, minimum relay fee for transactions */
 static const unsigned int DEFAULT_MIN_RELAY_TX_FEE = 1000;
@@ -476,7 +478,7 @@ protected:
 public:
     //! Reference to a BlockManager instance which itself is shared across all
     //! CChainState instances.
-    BlockManager& m_blockman;
+    node::BlockManager& m_blockman;
 
     /** Chain parameters for this chainstate */
     const CChainParams& m_params;
@@ -488,7 +490,7 @@ public:
 
     explicit CChainState(
         CTxMemPool* mempool,
-        BlockManager& blockman,
+        node::BlockManager& blockman,
         ChainstateManager& chainman,
         std::optional<uint256> from_snapshot_blockhash = std::nullopt);
 
@@ -535,7 +537,7 @@ public:
      * chainstates) and as good as our current tip or better. Entries may be failed,
      * though, and pruning nodes may be missing the data for the block.
      */
-    std::set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexCandidates;
+    std::set<CBlockIndex*, node::CBlockIndexWorkComparator> setBlockIndexCandidates;
 
     //! @returns A reference to the in-memory cache of the UTXO set.
     CCoinsViewCache& CoinsTip() EXCLUSIVE_LOCKS_REQUIRED(cs_main)
@@ -803,13 +805,13 @@ private:
     bool m_snapshot_validated{false};
 
     CBlockIndex* m_best_invalid;
-    friend bool BlockManager::LoadBlockIndex(const Consensus::Params&, ChainstateManager&);
+    friend bool node::BlockManager::LoadBlockIndex(const Consensus::Params&, ChainstateManager&);
 
     //! Internal helper for ActivateSnapshot().
     [[nodiscard]] bool PopulateAndValidateSnapshot(
         CChainState& snapshot_chainstate,
         CAutoFile& coins_file,
-        const SnapshotMetadata& metadata);
+        const node::SnapshotMetadata& metadata);
 
     /**
      * If a block header hasn't already been seen, call CheckBlockHeader on it, ensure
@@ -826,7 +828,7 @@ public:
     std::thread m_load_block;
     //! A single BlockManager instance is shared across each constructed
     //! chainstate to avoid duplicating block metadata.
-    BlockManager m_blockman GUARDED_BY(::cs_main);
+    node::BlockManager m_blockman GUARDED_BY(::cs_main);
 
     /**
      * In order to efficiently track invalidity of headers, we keep the set of
@@ -886,7 +888,7 @@ public:
     //! - Move the new chainstate to `m_snapshot_chainstate` and make it our
     //!   ChainstateActive().
     [[nodiscard]] bool ActivateSnapshot(
-        CAutoFile& coins_file, const SnapshotMetadata& metadata, bool in_memory);
+        CAutoFile& coins_file, const node::SnapshotMetadata& metadata, bool in_memory);
 
     //! The most-work chain.
     CChainState& ActiveChainstate() const;
@@ -894,7 +896,7 @@ public:
     int ActiveHeight() const { return ActiveChain().Height(); }
     CBlockIndex* ActiveTip() const { return ActiveChain().Tip(); }
 
-    BlockMap& BlockIndex() EXCLUSIVE_LOCKS_REQUIRED(::cs_main)
+    node::BlockMap& BlockIndex() EXCLUSIVE_LOCKS_REQUIRED(::cs_main)
     {
         return m_blockman.m_block_index;
     }

src/wallet/bdb.cpp

@@ -15,6 +15,7 @@
 #include <sys/stat.h>
 #endif
 
+namespace wallet {
 namespace {
 
 //! Make sure database has a unique fileid within the environment. If it
@@ -846,3 +847,4 @@ std::unique_ptr<BerkeleyDatabase> MakeBerkeleyDatabase(const fs::path& path, con
     status = DatabaseStatus::SUCCESS;
     return db;
 }
+} // namespace wallet

src/wallet/bdb.h

@@ -31,6 +31,7 @@
 
 struct bilingual_str;
 
+namespace wallet {
 static const unsigned int DEFAULT_WALLET_DBLOGSIZE = 100;
 static const bool DEFAULT_WALLET_PRIVDB = true;
 
@@ -229,5 +230,6 @@ bool BerkeleyDatabaseSanityCheck();
 
 //! Return object giving access to Berkeley database at specified path.
 std::unique_ptr<BerkeleyDatabase> MakeBerkeleyDatabase(const fs::path& path, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error);
+} // namespace wallet
 
 #endif // BITCOIN_WALLET_BDB_H

src/wallet/coincontrol.cpp

@@ -6,7 +6,9 @@
 
 #include <util/system.h>
 
+namespace wallet {
 CCoinControl::CCoinControl()
 {
     m_avoid_partial_spends = gArgs.GetBoolArg("-avoidpartialspends", DEFAULT_AVOIDPARTIALSPENDS);
 }
+} // namespace wallet

src/wallet/coincontrol.h

@@ -18,6 +18,7 @@
 #include <map>
 #include <set>
 
+namespace wallet {
 const int DEFAULT_MIN_DEPTH = 0;
 const int DEFAULT_MAX_DEPTH = 9999999;
 
@@ -118,5 +119,6 @@ private:
     std::set<COutPoint> setSelected;
     std::map<COutPoint, CTxOut> m_external_txouts;
 };
+} // namespace wallet
 
 #endif // BITCOIN_WALLET_COINCONTROL_H

src/wallet/coinselection.cpp

@@ -13,6 +13,7 @@
 #include <numeric>
 #include <optional>
 
+namespace wallet {
 // Descending order comparator
 struct {
     bool operator()(const OutputGroup& a, const OutputGroup& b) const
@@ -429,3 +430,4 @@ bool SelectionResult::operator<(SelectionResult other) const
     // As this operator is only used in std::min_element, we want the result that has more inputs when waste are equal.
     return *m_waste < *other.m_waste || (*m_waste == *other.m_waste && m_selected_inputs.size() > other.m_selected_inputs.size());
 }
+} // namespace wallet

src/wallet/coinselection.h

@@ -12,6 +12,7 @@
 
 #include <optional>
 
+namespace wallet {
 //! target minimum change amount
 static constexpr CAmount MIN_CHANGE{COIN / 100};
 //! final minimum change amount after paying for fees
@@ -249,5 +250,6 @@ std::optional<SelectionResult> SelectCoinsSRD(const std::vector<OutputGroup>& ut
 
 // Original coin selection algorithm as a fallback
 std::optional<SelectionResult> KnapsackSolver(std::vector<OutputGroup>& groups, const CAmount& nTargetValue);
+} // namespace wallet
 
 #endif // BITCOIN_WALLET_COINSELECTION_H

src/wallet/context.cpp

@@ -4,5 +4,7 @@
 
 #include <wallet/context.h>
 
+namespace wallet {
 WalletContext::WalletContext() {}
 WalletContext::~WalletContext() {}
+} // namespace wallet

src/wallet/context.h

@@ -13,12 +13,13 @@
 #include <vector>
 
 class ArgsManager;
-class CWallet;
 namespace interfaces {
 class Chain;
 class Wallet;
 } // namespace interfaces
 
+namespace wallet {
+class CWallet;
 using LoadWalletFn = std::function<void(std::unique_ptr<interfaces::Wallet> wallet)>;
 
 //! WalletContext struct containing references to state shared between CWallet
@@ -46,5 +47,6 @@ struct WalletContext {
     WalletContext();
     ~WalletContext();
 };
+} // namespace wallet
 
 #endif // BITCOIN_WALLET_CONTEXT_H

src/wallet/crypter.cpp

@@ -10,6 +10,7 @@
 
 #include <vector>
 
+namespace wallet {
 int CCrypter::BytesToKeySHA512AES(const std::vector<unsigned char>& chSalt, const SecureString& strKeyData, int count, unsigned char *key,unsigned char *iv) const
 {
     // This mimics the behavior of openssl's EVP_BytesToKey with an aes256cbc
@@ -136,3 +137,4 @@ bool DecryptKey(const CKeyingMaterial& vMasterKey, const std::vector<unsigned ch
     key.Set(vchSecret.begin(), vchSecret.end(), vchPubKey.IsCompressed());
     return key.VerifyPubKey(vchPubKey);
 }
+} // namespace wallet

src/wallet/crypter.h

@@ -10,6 +10,7 @@
 #include <script/signingprovider.h>
 
 
+namespace wallet {
 const unsigned int WALLET_CRYPTO_KEY_SIZE = 32;
 const unsigned int WALLET_CRYPTO_SALT_SIZE = 8;
 const unsigned int WALLET_CRYPTO_IV_SIZE = 16;
@@ -105,5 +106,6 @@ public:
 bool EncryptSecret(const CKeyingMaterial& vMasterKey, const CKeyingMaterial &vchPlaintext, const uint256& nIV, std::vector<unsigned char> &vchCiphertext);
 bool DecryptSecret(const CKeyingMaterial& vMasterKey, const std::vector<unsigned char>& vchCiphertext, const uint256& nIV, CKeyingMaterial& vchPlaintext);
 bool DecryptKey(const CKeyingMaterial& vMasterKey, const std::vector<unsigned char>& vchCryptedSecret, const CPubKey& vchPubKey, CKey& key);
+} // namespace wallet
 
 #endif // BITCOIN_WALLET_CRYPTER_H