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// Copyright (c) 2011-2022 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_QT_WALLETMODEL_H
#define BITCOIN_QT_WALLETMODEL_H
#include <key.h>
#include <qt/walletmodeltransaction.h>
#include <interfaces/wallet.h>
#include <support/allocators/secure.h>
#include <vector>
#include <QObject>
enum class OutputType;
class AddressTableModel;
class ClientModel;
class OptionsModel;
class PlatformStyle;
class RecentRequestsTableModel;
class SendCoinsRecipient;
class TransactionTableModel;
class WalletModelTransaction;
class CKeyID;
class COutPoint;
class CPubKey;
class uint256;
namespace interfaces {
class Node;
} // namespace interfaces
namespace wallet {
class CCoinControl;
} // namespace wallet
QT_BEGIN_NAMESPACE
class QTimer;
QT_END_NAMESPACE
/** Interface to Bitcoin wallet from Qt view code. */
class WalletModel : public QObject
{
Q_OBJECT
public:
explicit WalletModel(std::unique_ptr<interfaces::Wallet> wallet, ClientModel& client_model, const PlatformStyle *platformStyle, QObject *parent = nullptr);
~WalletModel();
enum StatusCode // Returned by sendCoins
{
OK,
InvalidAmount,
InvalidAddress,
AmountExceedsBalance,
AmountWithFeeExceedsBalance,
DuplicateAddress,
TransactionCreationFailed, // Error returned when wallet is still locked
AbsurdFee
};
enum EncryptionStatus
{
NoKeys, // wallet->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)
Unencrypted, // !wallet->IsCrypted()
Locked, // wallet->IsCrypted() && wallet->IsLocked()
Unlocked // wallet->IsCrypted() && !wallet->IsLocked()
};
OptionsModel* getOptionsModel() const;
AddressTableModel* getAddressTableModel() const;
TransactionTableModel* getTransactionTableModel() const;
RecentRequestsTableModel* getRecentRequestsTableModel() const;
EncryptionStatus getEncryptionStatus() const;
// Check address for validity
bool validateAddress(const QString& address) const;
// Return status record for SendCoins, contains error id + information
struct SendCoinsReturn
{
SendCoinsReturn(StatusCode _status = OK, QString _reasonCommitFailed = "")
: status(_status),
reasonCommitFailed(_reasonCommitFailed)
{
}
StatusCode status;
QString reasonCommitFailed;
};
// prepare transaction for getting txfee before sending coins
SendCoinsReturn prepareTransaction(WalletModelTransaction &transaction, const wallet::CCoinControl& coinControl);
// Send coins to a list of recipients
void sendCoins(WalletModelTransaction& transaction);
// Wallet encryption
bool setWalletEncrypted(const SecureString& passphrase);
// Passphrase only needed when unlocking
bool setWalletLocked(bool locked, const SecureString &passPhrase=SecureString());
bool changePassphrase(const SecureString &oldPass, const SecureString &newPass);
// RAII object for unlocking wallet, returned by requestUnlock()
class UnlockContext
{
public:
UnlockContext(WalletModel *wallet, bool valid, bool relock);
~UnlockContext();
bool isValid() const { return valid; }
// Disable unused copy/move constructors/assignments explicitly.
UnlockContext(const UnlockContext&) = delete;
UnlockContext(UnlockContext&&) = delete;
UnlockContext& operator=(const UnlockContext&) = delete;
UnlockContext& operator=(UnlockContext&&) = delete;
private:
WalletModel *wallet;
const bool valid;
const bool relock;
};
UnlockContext requestUnlock();
bool bumpFee(uint256 hash, uint256& new_hash);
void displayAddress(std::string sAddress) const;
static bool isWalletEnabled();
interfaces::Node& node() const { return m_node; }
interfaces::Wallet& wallet() const { return *m_wallet; }
ClientModel& clientModel() const { return *m_client_model; }
void setClientModel(ClientModel* client_model);
QString getWalletName() const;
QString getDisplayName() const;
bool isMultiwallet() const;
void refresh(bool pk_hash_only = false);
uint256 getLastBlockProcessed() const;
// Retrieve the cached wallet balance
interfaces::WalletBalances getCachedBalance() const;
// If coin control has selected outputs, searches the total amount inside the wallet.
// Otherwise, uses the wallet's cached available balance.
CAmount getAvailableBalance(const wallet::CCoinControl* control);
private:
std::unique_ptr<interfaces::Wallet> m_wallet;
std::unique_ptr<interfaces::Handler> m_handler_unload;
std::unique_ptr<interfaces::Handler> m_handler_status_changed;
std::unique_ptr<interfaces::Handler> m_handler_address_book_changed;
std::unique_ptr<interfaces::Handler> m_handler_transaction_changed;
std::unique_ptr<interfaces::Handler> m_handler_show_progress;
std::unique_ptr<interfaces::Handler> m_handler_watch_only_changed;
std::unique_ptr<interfaces::Handler> m_handler_can_get_addrs_changed;
ClientModel* m_client_model;
interfaces::Node& m_node;
bool fHaveWatchOnly;
bool fForceCheckBalanceChanged{false};
// Wallet has an options model for wallet-specific options
// (transaction fee, for example)
OptionsModel *optionsModel;
AddressTableModel* addressTableModel{nullptr};
TransactionTableModel* transactionTableModel{nullptr};
RecentRequestsTableModel* recentRequestsTableModel{nullptr};
// Cache some values to be able to detect changes
interfaces::WalletBalances m_cached_balances;
EncryptionStatus cachedEncryptionStatus{Unencrypted};
QTimer* timer;
// Block hash denoting when the last balance update was done.
uint256 m_cached_last_update_tip{};
void subscribeToCoreSignals();
void unsubscribeFromCoreSignals();
void checkBalanceChanged(const interfaces::WalletBalances& new_balances);
Q_SIGNALS:
// Signal that balance in wallet changed
void balanceChanged(const interfaces::WalletBalances& balances);
// Encryption status of wallet changed
void encryptionStatusChanged();
// Signal emitted when wallet needs to be unlocked
// It is valid behaviour for listeners to keep the wallet locked after this signal;
// this means that the unlocking failed or was cancelled.
void requireUnlock();
// Fired when a message should be reported to the user
void message(const QString &title, const QString &message, unsigned int style);
// Coins sent: from wallet, to recipient, in (serialized) transaction:
void coinsSent(WalletModel* wallet, SendCoinsRecipient recipient, QByteArray transaction);
// Show progress dialog e.g. for rescan
void showProgress(const QString &title, int nProgress);
// Watch-only address added
void notifyWatchonlyChanged(bool fHaveWatchonly);
// Signal that wallet is about to be removed
void unload();
// Notify that there are now keys in the keypool
void canGetAddressesChanged();
void timerTimeout();
public Q_SLOTS:
/* Starts a timer to periodically update the balance */
void startPollBalance();
/* Wallet status might have changed */
void updateStatus();
/* New transaction, or transaction changed status */
void updateTransaction();
/* New, updated or removed address book entry */
void updateAddressBook(const QString &address, const QString &label, bool isMine, wallet::AddressPurpose purpose, int status);
/* Watch-only added */
void updateWatchOnlyFlag(bool fHaveWatchonly);
/* Current, immature or unconfirmed balance might have changed - emit 'balanceChanged' if so */
void pollBalanceChanged();
};
#endif // BITCOIN_QT_WALLETMODEL_H
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