wallet.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_WALLET_WALLET_H
#define BITCOIN_WALLET_WALLET_H

#include <addresstype.h>
#include <consensus/amount.h>
#include <interfaces/chain.h>
#include <interfaces/handler.h>
#include <kernel/cs_main.h>
#include <logging.h>
#include <outputtype.h>
#include <policy/feerate.h>
#include <primitives/transaction.h>
#include <script/interpreter.h>
#include <script/script.h>
#include <support/allocators/secure.h>
#include <sync.h>
#include <tinyformat.h>
#include <uint256.h>
#include <util/fs.h>
#include <util/hasher.h>
#include <util/result.h>
#include <util/string.h>
#include <util/time.h>
#include <util/ui_change_type.h>
#include <wallet/crypter.h>
#include <wallet/db.h>
#include <wallet/scriptpubkeyman.h>
#include <wallet/transaction.h>
#include <wallet/types.h>
#include <wallet/walletutil.h>

#include <atomic>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <limits>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <unordered_map>
#include <utility>
#include <vector>

#include <boost/signals2/signal.hpp>

class CKey;
class CKeyID;
class CPubKey;
class Coin;
class SigningProvider;
enum class MemPoolRemovalReason;
enum class SigningResult;
namespace common {
enum class PSBTError;
} // namespace common
namespace interfaces {
class Wallet;
}
namespace wallet {
class CWallet;
class WalletBatch;
enum class DBErrors : int;
} // namespace wallet
struct CBlockLocator;
struct CExtKey;
struct FlatSigningProvider;
struct KeyOriginInfo;
struct PartiallySignedTransaction;
struct SignatureData;

using LoadWalletFn = std::function<void(std::unique_ptr<interfaces::Wallet> wallet)>;

struct bilingual_str;

namespace wallet {
struct WalletContext;

void WaitForDeleteWallet(std::shared_ptr<CWallet>&& wallet);

bool AddWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet);
bool RemoveWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet, std::optional<bool> load_on_start, std::vector<bilingual_str>& warnings);
bool RemoveWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet, std::optional<bool> load_on_start);
std::vector<std::shared_ptr<CWallet>> GetWallets(WalletContext& context);
std::shared_ptr<CWallet> GetDefaultWallet(WalletContext& context, size_t& count);
std::shared_ptr<CWallet> GetWallet(WalletContext& context, const std::string& name);
std::shared_ptr<CWallet> LoadWallet(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings);
std::shared_ptr<CWallet> CreateWallet(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings);
std::shared_ptr<CWallet> RestoreWallet(WalletContext& context, const fs::path& backup_file, const std::string& wallet_name, std::optional<bool> load_on_start, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings, bool load_after_restore = true);
std::unique_ptr<interfaces::Handler> HandleLoadWallet(WalletContext& context, LoadWalletFn load_wallet);
void NotifyWalletLoaded(WalletContext& context, const std::shared_ptr<CWallet>& wallet);
std::unique_ptr<WalletDatabase> MakeWalletDatabase(const std::string& name, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error);

constexpr CAmount DEFAULT_PAY_TX_FEE = 0;
static const CAmount DEFAULT_FALLBACK_FEE = 0;
static const CAmount DEFAULT_DISCARD_FEE = 10000;
static const CAmount DEFAULT_TRANSACTION_MINFEE = 1000;
static const CAmount DEFAULT_CONSOLIDATE_FEERATE{10000}; // 10 sat/vbyte
static const CAmount DEFAULT_MAX_AVOIDPARTIALSPEND_FEE = 0;
constexpr CAmount HIGH_APS_FEE{COIN / 10000};
static const CAmount WALLET_INCREMENTAL_RELAY_FEE = 5000;
static const bool DEFAULT_SPEND_ZEROCONF_CHANGE = true;
static const bool DEFAULT_WALLET_REJECT_LONG_CHAINS{true};
static const unsigned int DEFAULT_TX_CONFIRM_TARGET = 6;
static const bool DEFAULT_WALLET_RBF = true;
static const bool DEFAULT_WALLETBROADCAST = true;
static const bool DEFAULT_DISABLE_WALLET = false;
static const bool DEFAULT_WALLETCROSSCHAIN = false;
constexpr CAmount DEFAULT_TRANSACTION_MAXFEE{COIN / 10};
constexpr CAmount HIGH_TX_FEE_PER_KB{COIN / 100};
constexpr CAmount HIGH_MAX_TX_FEE{100 * HIGH_TX_FEE_PER_KB};
static constexpr size_t DUMMY_NESTED_P2WPKH_INPUT_SIZE = 91;

class CCoinControl;

constexpr OutputType DEFAULT_ADDRESS_TYPE{OutputType::BECH32};

static constexpr uint64_t KNOWN_WALLET_FLAGS =
        WALLET_FLAG_AVOID_REUSE
    |   WALLET_FLAG_BLANK_WALLET
    |   WALLET_FLAG_KEY_ORIGIN_METADATA
    |   WALLET_FLAG_LAST_HARDENED_XPUB_CACHED
    |   WALLET_FLAG_DISABLE_PRIVATE_KEYS
    |   WALLET_FLAG_DESCRIPTORS
    |   WALLET_FLAG_EXTERNAL_SIGNER;

static constexpr uint64_t MUTABLE_WALLET_FLAGS =
        WALLET_FLAG_AVOID_REUSE;

static const std::map<std::string,WalletFlags> WALLET_FLAG_MAP{
    {"avoid_reuse", WALLET_FLAG_AVOID_REUSE},
    {"blank", WALLET_FLAG_BLANK_WALLET},
    {"key_origin_metadata", WALLET_FLAG_KEY_ORIGIN_METADATA},
    {"last_hardened_xpub_cached", WALLET_FLAG_LAST_HARDENED_XPUB_CACHED},
    {"disable_private_keys", WALLET_FLAG_DISABLE_PRIVATE_KEYS},
    {"descriptor_wallet", WALLET_FLAG_DESCRIPTORS},
    {"external_signer", WALLET_FLAG_EXTERNAL_SIGNER}
};

class ReserveDestination
{
protected:
    const CWallet* const pwallet;
    ScriptPubKeyMan* m_spk_man{nullptr};
    OutputType const type;
    int64_t nIndex{-1};
    CTxDestination address;
    bool fInternal{false};

public:
    explicit ReserveDestination(CWallet* pwallet, OutputType type)
      : pwallet(pwallet)
      , type(type) { }

    ReserveDestination(const ReserveDestination&) = delete;
    ReserveDestination& operator=(const ReserveDestination&) = delete;

    ~ReserveDestination()
    {
        ReturnDestination();
    }

    util::Result<CTxDestination> GetReservedDestination(bool internal);
    void ReturnDestination();
    void KeepDestination();
};

struct CAddressBookData
{
    std::optional<std::string> label;

    std::optional<AddressPurpose> purpose;

    bool previously_spent{false};

    std::map<std::string, std::string> receive_requests{};

    bool IsChange() const { return !label.has_value(); }
    std::string GetLabel() const { return label ? *label : std::string{}; }
    void SetLabel(std::string name) { label = std::move(name); }
};

inline std::string PurposeToString(AddressPurpose p)
{
    switch(p) {
    case AddressPurpose::RECEIVE: return "receive";
    case AddressPurpose::SEND: return "send";
    case AddressPurpose::REFUND: return "refund";
    } // no default case so the compiler will warn when a new enum as added
    assert(false);
}

inline std::optional<AddressPurpose> PurposeFromString(std::string_view s)
{
    if (s == "receive") return AddressPurpose::RECEIVE;
    else if (s == "send") return AddressPurpose::SEND;
    else if (s == "refund") return AddressPurpose::REFUND;
    return {};
}

struct CRecipient
{
    CTxDestination dest;
    CAmount nAmount;
    bool fSubtractFeeFromAmount;
};

class WalletRescanReserver; //forward declarations for ScanForWalletTransactions/RescanFromTime
class CWallet final : public WalletStorage, public interfaces::Chain::Notifications
{
private:
    CKeyingMaterial vMasterKey GUARDED_BY(cs_wallet);

    bool Unlock(const CKeyingMaterial& vMasterKeyIn);

    std::atomic<bool> fAbortRescan{false};
    std::atomic<bool> fScanningWallet{false}; // controlled by WalletRescanReserver
    std::atomic<bool> m_attaching_chain{false};
    std::atomic<bool> m_scanning_with_passphrase{false};
    std::atomic<SteadyClock::time_point> m_scanning_start{SteadyClock::time_point{}};
    std::atomic<double> m_scanning_progress{0};
    friend class WalletRescanReserver;

    int nWalletVersion GUARDED_BY(cs_wallet){FEATURE_BASE};

    NodeClock::time_point m_next_resend{GetDefaultNextResend()};
    bool fBroadcastTransactions = false;
    // Local time that the tip block was received. Used to schedule wallet rebroadcasts.
    std::atomic<int64_t> m_best_block_time {0};

    // First created key time. Used to skip blocks prior to this time.
    // 'std::numeric_limits<int64_t>::max()' if wallet is blank.
    std::atomic<int64_t> m_birth_time{std::numeric_limits<int64_t>::max()};

    typedef std::unordered_multimap<COutPoint, uint256, SaltedOutpointHasher> TxSpends;
    TxSpends mapTxSpends GUARDED_BY(cs_wallet);
    void AddToSpends(const COutPoint& outpoint, const uint256& wtxid, WalletBatch* batch = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void AddToSpends(const CWalletTx& wtx, WalletBatch* batch = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool AddToWalletIfInvolvingMe(const CTransactionRef& tx, const SyncTxState& state, bool fUpdate, bool rescanning_old_block) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void MarkConflicted(const uint256& hashBlock, int conflicting_height, const uint256& hashTx);

    enum class TxUpdate { UNCHANGED, CHANGED, NOTIFY_CHANGED };

    using TryUpdatingStateFn = std::function<TxUpdate(CWalletTx& wtx)>;

    void RecursiveUpdateTxState(const uint256& tx_hash, const TryUpdatingStateFn& try_updating_state) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void RecursiveUpdateTxState(WalletBatch* batch, const uint256& tx_hash, const TryUpdatingStateFn& try_updating_state) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void MarkInputsDirty(const CTransactionRef& tx) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void SyncTransaction(const CTransactionRef& tx, const SyncTxState& state, bool update_tx = true, bool rescanning_old_block = false) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::atomic<uint64_t> m_wallet_flags{0};

    bool SetAddressBookWithDB(WalletBatch& batch, const CTxDestination& address, const std::string& strName, const std::optional<AddressPurpose>& strPurpose);

    void UnsetWalletFlagWithDB(WalletBatch& batch, uint64_t flag);

    void UnsetBlankWalletFlag(WalletBatch& batch) override;

    interfaces::Chain* m_chain;

    std::string m_name;

    std::unique_ptr<WalletDatabase> m_database;

    uint256 m_last_block_processed GUARDED_BY(cs_wallet);

    int m_last_block_processed_height GUARDED_BY(cs_wallet) = -1;

    std::map<OutputType, ScriptPubKeyMan*> m_external_spk_managers;
    std::map<OutputType, ScriptPubKeyMan*> m_internal_spk_managers;

    // Indexed by a unique identifier produced by each ScriptPubKeyMan using
    // ScriptPubKeyMan::GetID. In many cases it will be the hash of an internal structure
    std::map<uint256, std::unique_ptr<ScriptPubKeyMan>> m_spk_managers;

    // Appends spk managers into the main 'm_spk_managers'.
    // Must be the only method adding data to it.
    void AddScriptPubKeyMan(const uint256& id, std::unique_ptr<ScriptPubKeyMan> spkm_man);

    // Same as 'AddActiveScriptPubKeyMan' but designed for use within a batch transaction context
    void AddActiveScriptPubKeyManWithDb(WalletBatch& batch, uint256 id, OutputType type, bool internal);

    void SetWalletFlagWithDB(WalletBatch& batch, uint64_t flags);

    std::unordered_map<CScript, std::vector<ScriptPubKeyMan*>, SaltedSipHasher> m_cached_spks;

    static bool AttachChain(const std::shared_ptr<CWallet>& wallet, interfaces::Chain& chain, const bool rescan_required, bilingual_str& error, std::vector<bilingual_str>& warnings);

    static NodeClock::time_point GetDefaultNextResend();

public:
    mutable RecursiveMutex cs_wallet;

    WalletDatabase& GetDatabase() const override
    {
        assert(static_cast<bool>(m_database));
        return *m_database;
    }

    const std::string& GetName() const { return m_name; }

    typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
    MasterKeyMap mapMasterKeys;
    unsigned int nMasterKeyMaxID = 0;

    CWallet(interfaces::Chain* chain, const std::string& name, std::unique_ptr<WalletDatabase> database)
        : m_chain(chain),
          m_name(name),
          m_database(std::move(database))
    {
    }

    ~CWallet()
    {
        // Should not have slots connected at this point.
        assert(NotifyUnload.empty());
    }

    bool IsCrypted() const;
    bool IsLocked() const override;
    bool Lock();

    bool HaveChain() const { return m_chain ? true : false; }

    std::unordered_map<uint256, CWalletTx, SaltedTxidHasher> mapWallet GUARDED_BY(cs_wallet);

    typedef std::multimap<int64_t, CWalletTx*> TxItems;
    TxItems wtxOrdered;

    int64_t nOrderPosNext GUARDED_BY(cs_wallet) = 0;

    std::map<CTxDestination, CAddressBookData> m_address_book GUARDED_BY(cs_wallet);
    const CAddressBookData* FindAddressBookEntry(const CTxDestination&, bool allow_change = false) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::set<COutPoint> setLockedCoins GUARDED_BY(cs_wallet);

    std::unique_ptr<interfaces::Handler> m_chain_notifications_handler;

    interfaces::Chain& chain() const { assert(m_chain); return *m_chain; }

    const CWalletTx* GetWalletTx(const uint256& hash) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::set<uint256> GetTxConflicts(const CWalletTx& wtx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    int GetTxDepthInMainChain(const CWalletTx& wtx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    int GetTxBlocksToMaturity(const CWalletTx& wtx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool IsTxImmatureCoinBase(const CWalletTx& wtx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool CanSupportFeature(enum WalletFeature wf) const override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) { AssertLockHeld(cs_wallet); return IsFeatureSupported(nWalletVersion, wf); }

    bool IsSpent(const COutPoint& outpoint) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    // Whether this or any known scriptPubKey with the same single key has been spent.
    bool IsSpentKey(const CScript& scriptPubKey) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void SetSpentKeyState(WalletBatch& batch, const uint256& hash, unsigned int n, bool used, std::set<CTxDestination>& tx_destinations) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    util::Result<void> DisplayAddress(const CTxDestination& dest) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool IsLockedCoin(const COutPoint& output) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool LockCoin(const COutPoint& output, WalletBatch* batch = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool UnlockCoin(const COutPoint& output, WalletBatch* batch = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool UnlockAllCoins() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void ListLockedCoins(std::vector<COutPoint>& vOutpts) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    /*
     * Rescan abort properties
     */
    void AbortRescan() { fAbortRescan = true; }
    bool IsAbortingRescan() const { return fAbortRescan; }
    bool IsScanning() const { return fScanningWallet; }
    bool IsScanningWithPassphrase() const { return m_scanning_with_passphrase; }
    SteadyClock::duration ScanningDuration() const { return fScanningWallet ? SteadyClock::now() - m_scanning_start.load() : SteadyClock::duration{}; }
    double ScanningProgress() const { return fScanningWallet ? (double) m_scanning_progress : 0; }

    void UpgradeKeyMetadata() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void UpgradeDescriptorCache() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool LoadMinVersion(int nVersion) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) { AssertLockHeld(cs_wallet); nWalletVersion = nVersion; return true; }

    void LoadAddressPreviouslySpent(const CTxDestination& dest) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void LoadAddressReceiveRequest(const CTxDestination& dest, const std::string& id, const std::string& request) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    int64_t nRelockTime GUARDED_BY(cs_wallet){0};

    // Used to prevent concurrent calls to walletpassphrase RPC.
    Mutex m_unlock_mutex;
    // Used to prevent deleting the passphrase from memory when it is still in use.
    RecursiveMutex m_relock_mutex;

    bool Unlock(const SecureString& strWalletPassphrase);
    bool ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase);
    bool EncryptWallet(const SecureString& strWalletPassphrase);

    void GetKeyBirthTimes(std::map<CKeyID, int64_t> &mapKeyBirth) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    unsigned int ComputeTimeSmart(const CWalletTx& wtx, bool rescanning_old_block) const;

    int64_t IncOrderPosNext(WalletBatch *batch = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    DBErrors ReorderTransactions();

    void MarkDirty();

    using UpdateWalletTxFn = std::function<bool(CWalletTx& wtx, bool new_tx)>;

    CWalletTx* AddToWallet(CTransactionRef tx, const TxState& state, const UpdateWalletTxFn& update_wtx=nullptr, bool fFlushOnClose=true, bool rescanning_old_block = false);
    bool LoadToWallet(const uint256& hash, const UpdateWalletTxFn& fill_wtx) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void transactionAddedToMempool(const CTransactionRef& tx) override;
    void blockConnected(ChainstateRole role, const interfaces::BlockInfo& block) override;
    void blockDisconnected(const interfaces::BlockInfo& block) override;
    void updatedBlockTip() override;
    int64_t RescanFromTime(int64_t startTime, const WalletRescanReserver& reserver, bool update);

    struct ScanResult {
        enum { SUCCESS, FAILURE, USER_ABORT } status = SUCCESS;

        uint256 last_scanned_block;
        std::optional<int> last_scanned_height;

        uint256 last_failed_block;
    };
    ScanResult ScanForWalletTransactions(const uint256& start_block, int start_height, std::optional<int> max_height, const WalletRescanReserver& reserver, bool fUpdate, const bool save_progress);
    void transactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason) override;
    void SetNextResend() { m_next_resend = GetDefaultNextResend(); }
    bool ShouldResend() const;
    void ResubmitWalletTransactions(bool relay, bool force);

    OutputType TransactionChangeType(const std::optional<OutputType>& change_type, const std::vector<CRecipient>& vecSend) const;

    bool SignTransaction(CMutableTransaction& tx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool SignTransaction(CMutableTransaction& tx, const std::map<COutPoint, Coin>& coins, int sighash, std::map<int, bilingual_str>& input_errors) const;
    SigningResult SignMessage(const std::string& message, const PKHash& pkhash, std::string& str_sig) const;

    std::optional<common::PSBTError> FillPSBT(PartiallySignedTransaction& psbtx,
                  bool& complete,
                  int sighash_type = SIGHASH_DEFAULT,
                  bool sign = true,
                  bool bip32derivs = true,
                  size_t* n_signed = nullptr,
                  bool finalize = true) const;

    void CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::vector<std::pair<std::string, std::string>> orderForm);

    bool SubmitTxMemoryPoolAndRelay(CWalletTx& wtx, std::string& err_string, bool relay) const
        EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool ImportScripts(const std::set<CScript> scripts, int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool ImportPrivKeys(const std::map<CKeyID, CKey>& privkey_map, const int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool ImportPubKeys(const std::vector<std::pair<CKeyID, bool>>& ordered_pubkeys, const std::map<CKeyID, CPubKey>& pubkey_map, const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>>& key_origins, const bool add_keypool, const int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool ImportScriptPubKeys(const std::string& label, const std::set<CScript>& script_pub_keys, const bool have_solving_data, const bool apply_label, const int64_t timestamp) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void MaybeUpdateBirthTime(int64_t time);

    CFeeRate m_pay_tx_fee{DEFAULT_PAY_TX_FEE};
    unsigned int m_confirm_target{DEFAULT_TX_CONFIRM_TARGET};
    bool m_spend_zero_conf_change{DEFAULT_SPEND_ZEROCONF_CHANGE};
    bool m_signal_rbf{DEFAULT_WALLET_RBF};
    bool m_allow_fallback_fee{true}; 
    CFeeRate m_min_fee{DEFAULT_TRANSACTION_MINFEE}; 

    CFeeRate m_fallback_fee{DEFAULT_FALLBACK_FEE};

    CFeeRate m_discard_rate{DEFAULT_DISCARD_FEE};

    CFeeRate m_consolidate_feerate{DEFAULT_CONSOLIDATE_FEERATE};

    CAmount m_max_aps_fee{DEFAULT_MAX_AVOIDPARTIALSPEND_FEE}; 
    OutputType m_default_address_type{DEFAULT_ADDRESS_TYPE};
    std::optional<OutputType> m_default_change_type{};
    CAmount m_default_max_tx_fee{DEFAULT_TRANSACTION_MAXFEE};

    int64_t m_keypool_size{DEFAULT_KEYPOOL_SIZE};

    std::string m_notify_tx_changed_script;

    size_t KeypoolCountExternalKeys() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool TopUpKeyPool(unsigned int kpSize = 0);

    std::optional<int64_t> GetOldestKeyPoolTime() const;

    // Filter struct for 'ListAddrBookAddresses'
    struct AddrBookFilter {
        // Fetch addresses with the provided label
        std::optional<std::string> m_op_label{std::nullopt};
        // Don't include change addresses by default
        bool ignore_change{true};
    };

    std::vector<CTxDestination> ListAddrBookAddresses(const std::optional<AddrBookFilter>& filter) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::set<std::string> ListAddrBookLabels(const std::optional<AddressPurpose> purpose) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    using ListAddrBookFunc = std::function<void(const CTxDestination& dest, const std::string& label, bool is_change, const std::optional<AddressPurpose> purpose)>;
    void ForEachAddrBookEntry(const ListAddrBookFunc& func) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void MarkDestinationsDirty(const std::set<CTxDestination>& destinations) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    util::Result<CTxDestination> GetNewDestination(const OutputType type, const std::string label);
    util::Result<CTxDestination> GetNewChangeDestination(const OutputType type);

    isminetype IsMine(const CTxDestination& dest) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    isminetype IsMine(const CScript& script) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    CAmount GetDebit(const CTxIn& txin, const isminefilter& filter) const;
    isminetype IsMine(const CTxOut& txout) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool IsMine(const CTransaction& tx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    isminetype IsMine(const COutPoint& outpoint) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool IsFromMe(const CTransaction& tx) const;
    CAmount GetDebit(const CTransaction& tx, const isminefilter& filter) const;
    void chainStateFlushed(ChainstateRole role, const CBlockLocator& loc) override;

    DBErrors LoadWallet();

    util::Result<void> RemoveTxs(std::vector<uint256>& txs_to_remove) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    util::Result<void> RemoveTxs(WalletBatch& batch, std::vector<uint256>& txs_to_remove) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool SetAddressBook(const CTxDestination& address, const std::string& strName, const std::optional<AddressPurpose>& purpose);

    bool DelAddressBook(const CTxDestination& address);
    bool DelAddressBookWithDB(WalletBatch& batch, const CTxDestination& address);

    bool IsAddressPreviouslySpent(const CTxDestination& dest) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool SetAddressPreviouslySpent(WalletBatch& batch, const CTxDestination& dest, bool used) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::vector<std::string> GetAddressReceiveRequests() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool SetAddressReceiveRequest(WalletBatch& batch, const CTxDestination& dest, const std::string& id, const std::string& value) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool EraseAddressReceiveRequest(WalletBatch& batch, const CTxDestination& dest, const std::string& id) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    unsigned int GetKeyPoolSize() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void SetMinVersion(enum WalletFeature, WalletBatch* batch_in = nullptr) override;

    int GetVersion() const { LOCK(cs_wallet); return nWalletVersion; }

    std::set<uint256> GetConflicts(const uint256& txid) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool HasWalletSpend(const CTransactionRef& tx) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void Flush();

    void Close();

    boost::signals2::signal<void ()> NotifyUnload;

    boost::signals2::signal<void(const CTxDestination& address,
                                 const std::string& label, bool isMine,
                                 AddressPurpose purpose, ChangeType status)>
        NotifyAddressBookChanged;

    boost::signals2::signal<void(const uint256& hashTx, ChangeType status)> NotifyTransactionChanged;

    boost::signals2::signal<void (const std::string &title, int nProgress)> ShowProgress;

    boost::signals2::signal<void (bool fHaveWatchOnly)> NotifyWatchonlyChanged;

    boost::signals2::signal<void ()> NotifyCanGetAddressesChanged;

    boost::signals2::signal<void (CWallet* wallet)> NotifyStatusChanged;

    bool GetBroadcastTransactions() const { return fBroadcastTransactions; }
    void SetBroadcastTransactions(bool broadcast) { fBroadcastTransactions = broadcast; }

    bool TransactionCanBeAbandoned(const uint256& hashTx) const;

    /* Mark a transaction (and it in-wallet descendants) as abandoned so its inputs may be respent. */
    bool AbandonTransaction(const uint256& hashTx);
    bool AbandonTransaction(CWalletTx& tx) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool MarkReplaced(const uint256& originalHash, const uint256& newHash);

    /* Initializes the wallet, returns a new CWallet instance or a null pointer in case of an error */
    static std::shared_ptr<CWallet> Create(WalletContext& context, const std::string& name, std::unique_ptr<WalletDatabase> database, uint64_t wallet_creation_flags, bilingual_str& error, std::vector<bilingual_str>& warnings);

    void postInitProcess();

    bool BackupWallet(const std::string& strDest) const;

    /* Returns true if HD is enabled */
    bool IsHDEnabled() const;

    /* Returns true if the wallet can give out new addresses. This means it has keys in the keypool or can generate new keys */
    bool CanGetAddresses(bool internal = false) const;

    /* Returns the time of the first created key or, in case of an import, it could be the time of the first received transaction */
    int64_t GetBirthTime() const { return m_birth_time; }

    void BlockUntilSyncedToCurrentChain() const LOCKS_EXCLUDED(::cs_main) EXCLUSIVE_LOCKS_REQUIRED(!cs_wallet);

    void SetWalletFlag(uint64_t flags);

    void UnsetWalletFlag(uint64_t flag);

    bool IsWalletFlagSet(uint64_t flag) const override;

    void InitWalletFlags(uint64_t flags);
    bool LoadWalletFlags(uint64_t flags);

    bool IsLegacy() const;

    std::string GetDisplayName() const override
    {
        std::string wallet_name = GetName().length() == 0 ? "default wallet" : GetName();
        return strprintf("[%s]", wallet_name);
    };

    template <typename... Params>
    void WalletLogPrintf(util::ConstevalFormatString<sizeof...(Params)> wallet_fmt, const Params&... params) const
    {
        LogInfo("%s %s", GetDisplayName(), tfm::format(wallet_fmt, params...));
    };

    bool UpgradeWallet(int version, bilingual_str& error);

    std::set<ScriptPubKeyMan*> GetActiveScriptPubKeyMans() const;
    bool IsActiveScriptPubKeyMan(const ScriptPubKeyMan& spkm) const;

    std::set<ScriptPubKeyMan*> GetAllScriptPubKeyMans() const;

    ScriptPubKeyMan* GetScriptPubKeyMan(const OutputType& type, bool internal) const;

    std::set<ScriptPubKeyMan*> GetScriptPubKeyMans(const CScript& script) const;
    ScriptPubKeyMan* GetScriptPubKeyMan(const uint256& id) const;

    std::unique_ptr<SigningProvider> GetSolvingProvider(const CScript& script) const;
    std::unique_ptr<SigningProvider> GetSolvingProvider(const CScript& script, SignatureData& sigdata) const;

    std::vector<WalletDescriptor> GetWalletDescriptors(const CScript& script) const;

    LegacyScriptPubKeyMan* GetLegacyScriptPubKeyMan() const;
    LegacyScriptPubKeyMan* GetOrCreateLegacyScriptPubKeyMan();
    LegacyDataSPKM* GetLegacyDataSPKM() const;
    LegacyDataSPKM* GetOrCreateLegacyDataSPKM();

    void SetupLegacyScriptPubKeyMan();

    bool WithEncryptionKey(std::function<bool (const CKeyingMaterial&)> cb) const override;

    bool HasEncryptionKeys() const override;
    bool HaveCryptedKeys() const;

    int GetLastBlockHeight() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet)
    {
        AssertLockHeld(cs_wallet);
        assert(m_last_block_processed_height >= 0);
        return m_last_block_processed_height;
    };
    uint256 GetLastBlockHash() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet)
    {
        AssertLockHeld(cs_wallet);
        assert(m_last_block_processed_height >= 0);
        return m_last_block_processed;
    }
    void SetLastBlockProcessed(int block_height, uint256 block_hash) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet)
    {
        AssertLockHeld(cs_wallet);
        m_last_block_processed_height = block_height;
        m_last_block_processed = block_hash;
    };

    void ConnectScriptPubKeyManNotifiers();

    DescriptorScriptPubKeyMan& LoadDescriptorScriptPubKeyMan(uint256 id, WalletDescriptor& desc);

    void AddActiveScriptPubKeyMan(uint256 id, OutputType type, bool internal);

    void LoadActiveScriptPubKeyMan(uint256 id, OutputType type, bool internal);

    void DeactivateScriptPubKeyMan(uint256 id, OutputType type, bool internal);

    DescriptorScriptPubKeyMan& SetupDescriptorScriptPubKeyMan(WalletBatch& batch, const CExtKey& master_key, const OutputType& output_type, bool internal) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void SetupDescriptorScriptPubKeyMans(WalletBatch& batch, const CExtKey& master_key) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void SetupDescriptorScriptPubKeyMans() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    void SetupOwnDescriptorScriptPubKeyMans(WalletBatch& batch) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    DescriptorScriptPubKeyMan* GetDescriptorScriptPubKeyMan(const WalletDescriptor& desc) const;

    std::optional<bool> IsInternalScriptPubKeyMan(ScriptPubKeyMan* spk_man) const;

    ScriptPubKeyMan* AddWalletDescriptor(WalletDescriptor& desc, const FlatSigningProvider& signing_provider, const std::string& label, bool internal) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool MigrateToSQLite(bilingual_str& error) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::optional<MigrationData> GetDescriptorsForLegacy(bilingual_str& error) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    util::Result<void> ApplyMigrationData(WalletBatch& local_wallet_batch, MigrationData& data) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    bool CanGrindR() const;

    void CacheNewScriptPubKeys(const std::set<CScript>& spks, ScriptPubKeyMan* spkm);

    void TopUpCallback(const std::set<CScript>& spks, ScriptPubKeyMan* spkm) override;

    std::set<CExtPubKey> GetActiveHDPubKeys() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);

    std::optional<CKey> GetKey(const CKeyID& keyid) const;
};

void MaybeResendWalletTxs(WalletContext& context);

class WalletRescanReserver
{
private:
    using Clock = std::chrono::steady_clock;
    using NowFn = std::function<Clock::time_point()>;
    CWallet& m_wallet;
    bool m_could_reserve{false};
    NowFn m_now;
public:
    explicit WalletRescanReserver(CWallet& w) : m_wallet(w) {}

    bool reserve(bool with_passphrase = false)
    {
        assert(!m_could_reserve);
        if (m_wallet.fScanningWallet.exchange(true)) {
            return false;
        }
        m_wallet.m_scanning_with_passphrase.exchange(with_passphrase);
        m_wallet.m_scanning_start = SteadyClock::now();
        m_wallet.m_scanning_progress = 0;
        m_could_reserve = true;
        return true;
    }

    bool isReserved() const
    {
        return (m_could_reserve && m_wallet.fScanningWallet);
    }

    Clock::time_point now() const { return m_now ? m_now() : Clock::now(); };

    void setNow(NowFn now) { m_now = std::move(now); }

    ~WalletRescanReserver()
    {
        if (m_could_reserve) {
            m_wallet.fScanningWallet = false;
            m_wallet.m_scanning_with_passphrase = false;
        }
    }
};

bool AddWalletSetting(interfaces::Chain& chain, const std::string& wallet_name);

bool RemoveWalletSetting(interfaces::Chain& chain, const std::string& wallet_name);

struct MigrationResult {
    std::string wallet_name;
    std::shared_ptr<CWallet> wallet;
    std::shared_ptr<CWallet> watchonly_wallet;
    std::shared_ptr<CWallet> solvables_wallet;
    fs::path backup_path;
};

[[nodiscard]] util::Result<MigrationResult> MigrateLegacyToDescriptor(const std::string& wallet_name, const SecureString& passphrase, WalletContext& context);
[[nodiscard]] util::Result<MigrationResult> MigrateLegacyToDescriptor(std::shared_ptr<CWallet> local_wallet, const SecureString& passphrase, WalletContext& context, bool was_loaded);
} // namespace wallet

#endif // BITCOIN_WALLET_WALLET_H