aboutsummaryrefslogtreecommitdiff
path: root/src/qt/walletmodel.h
blob: 8cba10f5d27c236a6e042be14788b4b195247bd7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
#ifndef WALLETMODEL_H
#define WALLETMODEL_H

#include <QObject>

#include "allocators.h" /* for SecureString */
#include "paymentrequestplus.h"

class OptionsModel;
class AddressTableModel;
class TransactionTableModel;
class CWallet;

QT_BEGIN_NAMESPACE
class QTimer;
QT_END_NAMESPACE

class SendCoinsRecipient
{
public:
    SendCoinsRecipient() : amount(0) { }

    QString address;
    QString label;
    qint64 amount;

    // If from a payment request, paymentRequest.IsInitialized() will be true
    PaymentRequestPlus paymentRequest;
    QString authenticatedMerchant; // Empty if no authentication or invalid signature/cert/etc.
};

/** Interface to Bitcoin wallet from Qt view code. */
class WalletModel : public QObject
{
    Q_OBJECT

public:
    explicit WalletModel(CWallet *wallet, OptionsModel *optionsModel, QObject *parent = 0);
    ~WalletModel();

    enum StatusCode // Returned by sendCoins
    {
        OK,
        InvalidAmount,
        InvalidAddress,
        AmountExceedsBalance,
        AmountWithFeeExceedsBalance,
        DuplicateAddress,
        TransactionCreationFailed, // Error returned when wallet is still locked
        TransactionCommitFailed,
        Aborted
    };

    enum EncryptionStatus
    {
        Unencrypted,  // !wallet->IsCrypted()
        Locked,       // wallet->IsCrypted() && wallet->IsLocked()
        Unlocked      // wallet->IsCrypted() && !wallet->IsLocked()
    };

    OptionsModel *getOptionsModel();
    AddressTableModel *getAddressTableModel();
    TransactionTableModel *getTransactionTableModel();

    qint64 getBalance() const;
    qint64 getUnconfirmedBalance() const;
    qint64 getImmatureBalance() const;
    int getNumTransactions() const;
    EncryptionStatus getEncryptionStatus() const;

    // Check address for validity
    bool validateAddress(const QString &address);

    // Return status record for SendCoins, contains error id + information
    struct SendCoinsReturn
    {
        SendCoinsReturn(StatusCode status,
                        qint64 fee=0):
            status(status), fee(fee) {}
        StatusCode status;
        qint64 fee; // is used in case status is "AmountWithFeeExceedsBalance"
    };

    // Send coins to a list of recipients
    SendCoinsReturn sendCoins(const QList<SendCoinsRecipient> &recipients);

    // Wallet encryption
    bool setWalletEncrypted(bool encrypted, const SecureString &passphrase);
    // Passphrase only needed when unlocking
    bool setWalletLocked(bool locked, const SecureString &passPhrase=SecureString());
    bool changePassphrase(const SecureString &oldPass, const SecureString &newPass);
    // Wallet backup
    bool backupWallet(const QString &filename);

    // RAI object for unlocking wallet, returned by requestUnlock()
    class UnlockContext
    {
    public:
        UnlockContext(WalletModel *wallet, bool valid, bool relock);
        ~UnlockContext();

        bool isValid() const { return valid; }

        // Copy operator and constructor transfer the context
        UnlockContext(const UnlockContext& obj) { CopyFrom(obj); }
        UnlockContext& operator=(const UnlockContext& rhs) { CopyFrom(rhs); return *this; }
    private:
        WalletModel *wallet;
        bool valid;
        mutable bool relock; // mutable, as it can be set to false by copying

        void CopyFrom(const UnlockContext& rhs);
    };

    UnlockContext requestUnlock();

private:
    CWallet *wallet;

    // Wallet has an options model for wallet-specific options
    // (transaction fee, for example)
    OptionsModel *optionsModel;

    AddressTableModel *addressTableModel;
    TransactionTableModel *transactionTableModel;

    // Cache some values to be able to detect changes
    qint64 cachedBalance;
    qint64 cachedUnconfirmedBalance;
    qint64 cachedImmatureBalance;
    qint64 cachedNumTransactions;
    EncryptionStatus cachedEncryptionStatus;
    int cachedNumBlocks;

    QTimer *pollTimer;

    void subscribeToCoreSignals();
    void unsubscribeFromCoreSignals();
    void checkBalanceChanged();

signals:
    // Signal that balance in wallet changed
    void balanceChanged(qint64 balance, qint64 unconfirmedBalance, qint64 immatureBalance);

    // Number of transactions in wallet changed
    void numTransactionsChanged(int count);

    // Encryption status of wallet changed
    void encryptionStatusChanged(int status);

    // 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();

    // Asynchronous message notification
    void message(const QString &title, const QString &message, unsigned int style);

    // Coins sent: from wallet, to recipient, in (serialized) transaction:
    void coinsSent(CWallet* wallet, SendCoinsRecipient recipient, QByteArray transaction);

public slots:
    /* Wallet status might have changed */
    void updateStatus();
    /* New transaction, or transaction changed status */
    void updateTransaction(const QString &hash, int status);
    /* New, updated or removed address book entry */
    void updateAddressBook(const QString &address, const QString &label, bool isMine, int status);
    /* Current, immature or unconfirmed balance might have changed - emit 'balanceChanged' if so */
    void pollBalanceChanged();
};

#endif // WALLETMODEL_H