wallet.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2020 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 <consensus/amount.h>
#include <interfaces/chain.h>
#include <interfaces/handler.h>
#include <outputtype.h>
#include <policy/feerate.h>
#include <psbt.h>
#include <tinyformat.h>
#include <util/message.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <util/system.h>
#include <util/ui_change_type.h>
#include <validationinterface.h>
#include <wallet/coinselection.h>
#include <wallet/crypter.h>
#include <wallet/scriptpubkeyman.h>
#include <wallet/transaction.h>
#include <wallet/walletdb.h>
#include <wallet/walletutil.h>
 
#include <algorithm>
#include <atomic>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <stdexcept>
#include <stdint.h>
#include <string>
#include <utility>
#include <vector>
 
#include <boost/signals2/signal.hpp>
 
struct WalletContext;
 
using LoadWalletFn = std::function<void(std::unique_ptr<interfaces::Wallet> wallet)>;
 
struct bilingual_str;
 
void UnloadWallet(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> 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::unique_ptr<interfaces::Handler> HandleLoadWallet(WalletContext& context, LoadWalletFn load_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 = false;
static const unsigned int DEFAULT_TX_CONFIRM_TARGET = 6;
static const bool DEFAULT_WALLET_RBF = false;
static const bool DEFAULT_WALLETBROADCAST = true;
static const bool DEFAULT_DISABLE_WALLET = 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;
class COutput;
class CScript;
class CWalletTx;
struct FeeCalculation;
enum class FeeEstimateMode;
class ReserveDestination;
 
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}
};
 
extern const std::map<uint64_t,std::string> WALLET_FLAG_CAVEATS;
 
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();
    }
 
    bool GetReservedDestination(CTxDestination& pubkey, bool internal, bilingual_str& error);
    void ReturnDestination();
    void KeepDestination();
};
 
class CAddressBookData
{
private:
    bool m_change{true};
    std::string m_label;
public:
    std::string purpose;
 
    CAddressBookData() : purpose("unknown") {}
 
    typedef std::map<std::string, std::string> StringMap;
    StringMap destdata;
 
    bool IsChange() const { return m_change; }
    const std::string& GetLabel() const { return m_label; }
    void SetLabel(const std::string& label) {
        m_change = false;
        m_label = label;
    }
};
 
struct CRecipient
{
    CScript scriptPubKey;
    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, bool accept_no_keys = false);
 
    std::atomic<bool> fAbortRescan{false};
    std::atomic<bool> fScanningWallet{false}; // controlled by WalletRescanReserver
    std::atomic<int64_t> m_scanning_start{0};
    std::atomic<double> m_scanning_progress{0};
    friend class WalletRescanReserver;
 
    int nWalletVersion GUARDED_BY(cs_wallet){FEATURE_BASE};
 
    int64_t nNextResend = 0;
    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};
 
    typedef std::multimap<COutPoint, uint256> 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 uint256& wtxid, WalletBatch* batch = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    bool AddToWalletIfInvolvingMe(const CTransactionRef& tx, CWalletTx::Confirmation confirm, bool fUpdate, bool rescanning_old_block) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    void MarkConflicted(const uint256& hashBlock, int conflicting_height, const uint256& hashTx);
 
    void MarkInputsDirty(const CTransactionRef& tx) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    /* Used by TransactionAddedToMemorypool/BlockConnected/Disconnected/ScanForWalletTransactions.
     * Should be called with non-zero block_hash and posInBlock if this is for a transaction that is included in a block. */
    void SyncTransaction(const CTransactionRef& tx, CWalletTx::Confirmation confirm, 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::string& 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> const 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;
 
    static bool AttachChain(const std::shared_ptr<CWallet>& wallet, interfaces::Chain& chain, const bool rescan_required, bilingual_str& error, std::vector<bilingual_str>& warnings);
 
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::map<uint256, CWalletTx> mapWallet GUARDED_BY(cs_wallet);
 
    typedef std::multimap<int64_t, CWalletTx*> TxItems;
    TxItems wtxOrdered;
 
    int64_t nOrderPosNext GUARDED_BY(cs_wallet) = 0;
    uint64_t nAccountingEntryNumber = 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);
 
    // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
    // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The annotation
    // "NO_THREAD_SAFETY_ANALYSIS" was temporarily added to avoid having to
    // resolve the issue of member access into incomplete type CWallet. Note
    // that we still have the runtime check "AssertLockHeld(pwallet->cs_wallet)"
    // in place.
    std::set<uint256> GetTxConflicts(const CWalletTx& wtx) const NO_THREAD_SAFETY_ANALYSIS;
 
    // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
    // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The annotation
    // "NO_THREAD_SAFETY_ANALYSIS" was temporarily added to avoid having to
    // resolve the issue of member access into incomplete type CWallet. Note
    // that we still have the runtime check "AssertLockHeld(pwallet->cs_wallet)"
    // in place.
    int GetTxDepthInMainChain(const CWalletTx& wtx) const NO_THREAD_SAFETY_ANALYSIS;
    bool IsTxInMainChain(const CWalletTx& wtx) const { return GetTxDepthInMainChain(wtx) > 0; }
 
    int GetTxBlocksToMaturity(const CWalletTx& wtx) const;
    bool IsTxImmatureCoinBase(const CWalletTx& wtx) const;
 
    bool CanSupportFeature(enum WalletFeature wf) const override EXCLUSIVE_LOCKS_REQUIRED(cs_wallet) { AssertLockHeld(cs_wallet); return IsFeatureSupported(nWalletVersion, wf); }
 
    bool IsSpent(const uint256& hash, unsigned int n) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    // Whether this or any known UTXO with the same single key has been spent.
    bool IsSpentKey(const uint256& hash, unsigned int n) 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);
 
    bool DisplayAddress(const CTxDestination& dest) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    bool IsLockedCoin(uint256 hash, unsigned int n) 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; }
    int64_t ScanningDuration() const { return fScanningWallet ? GetTimeMillis() - m_scanning_start : 0; }
    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 LoadDestData(const CTxDestination& dest, const std::string& key, const std::string& value) 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;
    bool Unlock(const SecureString& strWalletPassphrase, bool accept_no_keys = false);
    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 CWalletTx::Confirmation& confirm, 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, uint64_t mempool_sequence) override;
    void blockConnected(const CBlock& block, int height) override;
    void blockDisconnected(const CBlock& block, int height) 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);
    void transactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason, uint64_t mempool_sequence) override;
    void ReacceptWalletTransactions() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    void ResendWalletTransactions();
 
    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;
 
    TransactionError FillPSBT(PartiallySignedTransaction& psbtx,
                  bool& complete,
                  int sighash_type = 1 /* SIGHASH_ALL */,
                  bool sign = true,
                  bool bip32derivs = true,
                  size_t* n_signed = nullptr) const;
 
    void CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::vector<std::pair<std::string, std::string>> orderForm);
 
    bool SubmitTxMemoryPoolAndRelay(const CWalletTx& wtx, std::string& err_string, bool relay) const;
 
    bool DummySignTx(CMutableTransaction &txNew, const std::set<CTxOut> &txouts, const CCoinControl* coin_control = nullptr) const
    {
        std::vector<CTxOut> v_txouts(txouts.size());
        std::copy(txouts.begin(), txouts.end(), v_txouts.begin());
        return DummySignTx(txNew, v_txouts, coin_control);
    }
    bool DummySignTx(CMutableTransaction &txNew, const std::vector<CTxOut> &txouts, const CCoinControl* coin_control = nullptr) const;
 
    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<CKeyID>& ordered_pubkeys, const std::map<CKeyID, CPubKey>& pubkey_map, const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>>& key_origins, const bool add_keypool, const bool internal, 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);
 
    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};
 
    size_t KeypoolCountExternalKeys() const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool TopUpKeyPool(unsigned int kpSize = 0);
 
    int64_t GetOldestKeyPoolTime() const;
 
    std::set<CTxDestination> GetLabelAddresses(const std::string& label) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    void MarkDestinationsDirty(const std::set<CTxDestination>& destinations) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    bool GetNewDestination(const OutputType type, const std::string label, CTxDestination& dest, bilingual_str& error);
    bool GetNewChangeDestination(const OutputType type, CTxDestination& dest, bilingual_str& error);
 
    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);
    bool IsFromMe(const CTransaction& tx) const;
    CAmount GetDebit(const CTransaction& tx, const isminefilter& filter) const;
    void chainStateFlushed(const CBlockLocator& loc) override;
 
    DBErrors LoadWallet();
    DBErrors ZapSelectTx(std::vector<uint256>& vHashIn, std::vector<uint256>& vHashOut) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    bool SetAddressBook(const CTxDestination& address, const std::string& strName, const std::string& purpose);
 
    bool DelAddressBook(const CTxDestination& address);
 
    bool IsAddressUsed(const CTxDestination& dest) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
    bool SetAddressUsed(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);
 
    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 uint256& txid) 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,
                                 const std::string& 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 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;
 
    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;
 
    bool AddWalletFlags(uint64_t flags);
    bool LoadWalletFlags(uint64_t flags);
 
    bool IsLegacy() const;
 
    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(std::string fmt, Params... parameters) const {
        LogPrintf(("%s " + fmt).c_str(), GetDisplayName(), parameters...);
    };
 
    bool UpgradeWallet(int version, bilingual_str& error);
 
    std::set<ScriptPubKeyMan*> GetActiveScriptPubKeyMans() const;
 
    std::set<ScriptPubKeyMan*> GetAllScriptPubKeyMans() const;
 
    ScriptPubKeyMan* GetScriptPubKeyMan(const OutputType& type, bool internal) const;
 
    ScriptPubKeyMan* GetScriptPubKeyMan(const CScript& script) const;
    ScriptPubKeyMan* GetScriptPubKeyMan(const uint256& id) const;
 
    std::set<ScriptPubKeyMan*> GetScriptPubKeyMans(const CScript& script, SignatureData& sigdata) const;
 
    std::unique_ptr<SigningProvider> GetSolvingProvider(const CScript& script) const;
    std::unique_ptr<SigningProvider> GetSolvingProvider(const CScript& script, SignatureData& sigdata) const;
 
    LegacyScriptPubKeyMan* GetLegacyScriptPubKeyMan() const;
    LegacyScriptPubKeyMan* GetOrCreateLegacyScriptPubKeyMan();
 
    void SetupLegacyScriptPubKeyMan();
 
    const CKeyingMaterial& GetEncryptionKey() const override;
    bool HasEncryptionKeys() const override;
 
    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();
 
    void 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);
 
    void SetupDescriptorScriptPubKeyMans() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
    DescriptorScriptPubKeyMan* GetDescriptorScriptPubKeyMan(const WalletDescriptor& desc) const;
 
    ScriptPubKeyMan* AddWalletDescriptor(WalletDescriptor& desc, const FlatSigningProvider& signing_provider, const std::string& label, bool internal) EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
};
 
void MaybeResendWalletTxs(WalletContext& context);
 
class WalletRescanReserver
{
private:
    CWallet& m_wallet;
    bool m_could_reserve;
public:
    explicit WalletRescanReserver(CWallet& w) : m_wallet(w), m_could_reserve(false) {}
 
    bool reserve()
    {
        assert(!m_could_reserve);
        if (m_wallet.fScanningWallet.exchange(true)) {
            return false;
        }
        m_wallet.m_scanning_start = GetTimeMillis();
        m_wallet.m_scanning_progress = 0;
        m_could_reserve = true;
        return true;
    }
 
    bool isReserved() const
    {
        return (m_could_reserve && m_wallet.fScanningWallet);
    }
 
    ~WalletRescanReserver()
    {
        if (m_could_reserve) {
            m_wallet.fScanningWallet = false;
        }
    }
};
 
bool AddWalletSetting(interfaces::Chain& chain, const std::string& wallet_name);
 
bool RemoveWalletSetting(interfaces::Chain& chain, const std::string& wallet_name);
 
bool DummySignInput(const SigningProvider& provider, CTxIn &tx_in, const CTxOut &txout, bool use_max_sig);
 
#endif // BITCOIN_WALLET_WALLET_H