aboutsummaryrefslogtreecommitdiff
path: root/src/qt/walletmodel.cpp
blob: 8344a653d5112edc63bd84d7cdb6a22de22dc09a (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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
#include "walletmodel.h"
#include "guiconstants.h"
#include "optionsmodel.h"
#include "addresstablemodel.h"
#include "transactiontablemodel.h"

#include "headers.h"
#include "db.h" // for BackupWallet

#include <QTimer>
#include <QSet>

WalletModel::WalletModel(CWallet *wallet, OptionsModel *optionsModel, QObject *parent) :
    QObject(parent), wallet(wallet), optionsModel(optionsModel), addressTableModel(0),
    transactionTableModel(0),
    cachedBalance(0), cachedUnconfirmedBalance(0), cachedNumTransactions(0),
    cachedEncryptionStatus(Unencrypted)
{
    // Until signal notifications is built into the bitcoin core,
    //  simply update everything after polling using a timer.
    QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(update()));
    timer->start(MODEL_UPDATE_DELAY);

    addressTableModel = new AddressTableModel(wallet, this);
    transactionTableModel = new TransactionTableModel(wallet, this);
}

qint64 WalletModel::getBalance() const
{
    return wallet->GetBalance();
}

qint64 WalletModel::getUnconfirmedBalance() const
{
    return wallet->GetUnconfirmedBalance();
}

int WalletModel::getNumTransactions() const
{
    int numTransactions = 0;
    CRITICAL_BLOCK(wallet->cs_wallet)
    {
        numTransactions = wallet->mapWallet.size();
    }
    return numTransactions;
}

void WalletModel::update()
{
    qint64 newBalance = getBalance();
    qint64 newUnconfirmedBalance = getUnconfirmedBalance();
    int newNumTransactions = getNumTransactions();
    EncryptionStatus newEncryptionStatus = getEncryptionStatus();

    if(cachedBalance != newBalance || cachedUnconfirmedBalance != newUnconfirmedBalance)
        emit balanceChanged(newBalance, newUnconfirmedBalance);

    if(cachedNumTransactions != newNumTransactions)
        emit numTransactionsChanged(newNumTransactions);

    if(cachedEncryptionStatus != newEncryptionStatus)
        emit encryptionStatusChanged(newEncryptionStatus);

    cachedBalance = newBalance;
    cachedUnconfirmedBalance = newUnconfirmedBalance;
    cachedNumTransactions = newNumTransactions;

    addressTableModel->update();
}

bool WalletModel::validateAddress(const QString &address)
{
    CBitcoinAddress addressParsed(address.toStdString());
    return addressParsed.IsValid();
}

WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipient> &recipients)
{
    qint64 total = 0;
    QSet<QString> setAddress;
    QString hex;

    if(recipients.empty())
    {
        return OK;
    }

    // Pre-check input data for validity
    foreach(const SendCoinsRecipient &rcp, recipients)
    {
        if(!validateAddress(rcp.address))
        {
            return InvalidAddress;
        }
        setAddress.insert(rcp.address);

        if(rcp.amount <= 0)
        {
            return InvalidAmount;
        }
        total += rcp.amount;
    }

    if(recipients.size() > setAddress.size())
    {
        return DuplicateAddress;
    }

    if(total > getBalance())
    {
        return AmountExceedsBalance;
    }

    if((total + nTransactionFee) > getBalance())
    {
        return SendCoinsReturn(AmountWithFeeExceedsBalance, nTransactionFee);
    }

    CRITICAL_BLOCK(cs_main)
    CRITICAL_BLOCK(wallet->cs_wallet)
    {
        // Sendmany
        std::vector<std::pair<CScript, int64> > vecSend;
        foreach(const SendCoinsRecipient &rcp, recipients)
        {
            CScript scriptPubKey;
            scriptPubKey.SetBitcoinAddress(rcp.address.toStdString());
            vecSend.push_back(make_pair(scriptPubKey, rcp.amount));
        }

        CWalletTx wtx;
        CReserveKey keyChange(wallet);
        int64 nFeeRequired = 0;
        bool fCreated = wallet->CreateTransaction(vecSend, wtx, keyChange, nFeeRequired);

        if(!fCreated)
        {
            if((total + nFeeRequired) > wallet->GetBalance())
            {
                return SendCoinsReturn(AmountWithFeeExceedsBalance, nFeeRequired);
            }
            return TransactionCreationFailed;
        }
        if(!ThreadSafeAskFee(nFeeRequired, tr("Sending...").toStdString(), NULL))
        {
            return Aborted;
        }
        if(!wallet->CommitTransaction(wtx, keyChange))
        {
            return TransactionCommitFailed;
        }
        hex = QString::fromStdString(wtx.GetHash().GetHex());
    }

    // Add addresses that we've sent to to the address book
    foreach(const SendCoinsRecipient &rcp, recipients)
    {
        std::string strAddress = rcp.address.toStdString();
        CRITICAL_BLOCK(wallet->cs_wallet)
        {
            if (!wallet->mapAddressBook.count(strAddress))
                wallet->SetAddressBookName(strAddress, rcp.label.toStdString());
        }
    }

    // Update our model of the address table
    addressTableModel->updateList();

    return SendCoinsReturn(OK, 0, hex);
}

OptionsModel *WalletModel::getOptionsModel()
{
    return optionsModel;
}

AddressTableModel *WalletModel::getAddressTableModel()
{
    return addressTableModel;
}

TransactionTableModel *WalletModel::getTransactionTableModel()
{
    return transactionTableModel;
}

WalletModel::EncryptionStatus WalletModel::getEncryptionStatus() const
{
    if(!wallet->IsCrypted())
    {
        return Unencrypted;
    }
    else if(wallet->IsLocked())
    {
        return Locked;
    }
    else
    {
        return Unlocked;
    }
}

bool WalletModel::setWalletEncrypted(bool encrypted, const SecureString &passphrase)
{
    if(encrypted)
    {
        // Encrypt
        return wallet->EncryptWallet(passphrase);
    }
    else
    {
        // Decrypt -- TODO; not supported yet
        return false;
    }
}

bool WalletModel::setWalletLocked(bool locked, const SecureString &passPhrase)
{
    if(locked)
    {
        // Lock
        return wallet->Lock();
    }
    else
    {
        // Unlock
        return wallet->Unlock(passPhrase);
    }
}

bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureString &newPass)
{
    bool retval;
    CRITICAL_BLOCK(wallet->cs_wallet)
    {
        wallet->Lock(); // Make sure wallet is locked before attempting pass change
        retval = wallet->ChangeWalletPassphrase(oldPass, newPass);
    }
    return retval;
}

bool WalletModel::backupWallet(const QString &filename)
{
    return BackupWallet(*wallet, filename.toLocal8Bit().data());
}

// WalletModel::UnlockContext implementation
WalletModel::UnlockContext WalletModel::requestUnlock()
{
    bool was_locked = getEncryptionStatus() == Locked;
    if(was_locked)
    {
        // Request UI to unlock wallet
        emit requireUnlock();
    }
    // If wallet is still locked, unlock was failed or cancelled, mark context as invalid
    bool valid = getEncryptionStatus() != Locked;

    return UnlockContext(this, valid, was_locked);
}

WalletModel::UnlockContext::UnlockContext(WalletModel *wallet, bool valid, bool relock):
        wallet(wallet),
        valid(valid),
        relock(relock)
{
}

WalletModel::UnlockContext::~UnlockContext()
{
    if(valid && relock)
    {
        wallet->setWalletLocked(true);
    }
}

void WalletModel::UnlockContext::CopyFrom(const UnlockContext& rhs)
{
    // Transfer context; old object no longer relocks wallet
    *this = rhs;
    rhs.relock = false;
}