src/qt/walletmodel.cpp

   1 #include "walletmodel.h"
   2 #include "guiconstants.h"
   3 #include "optionsmodel.h"
   4 #include "addresstablemodel.h"
   5 #include "transactiontablemodel.h"
   6
   7 #include "headers.h"
   8 #include "db.h" // for BackupWallet
   9
  10 #include <QSet>
  11
  12 WalletModel::WalletModel(CWallet *wallet, OptionsModel *optionsModel, QObject *parent) :
  13     QObject(parent), wallet(wallet), optionsModel(optionsModel), addressTableModel(0),
  14     transactionTableModel(0),
  15     cachedBalance(0), cachedUnconfirmedBalance(0), cachedNumTransactions(0),
  16     cachedEncryptionStatus(Unencrypted)
  17 {
  18     addressTableModel = new AddressTableModel(wallet, this);
  19     transactionTableModel = new TransactionTableModel(wallet, this);
  20 }
  21
  22 qint64 WalletModel::getBalance() const
  23 {
  24     return wallet->GetBalance();
  25 }
  26
  27 qint64 WalletModel::getUnconfirmedBalance() const
  28 {
  29     return wallet->GetUnconfirmedBalance();
  30 }
  31
  32 int WalletModel::getNumTransactions() const
  33 {
  34     int numTransactions = 0;
  35     {
  36         LOCK(wallet->cs_wallet);
  37         numTransactions = wallet->mapWallet.size();
  38     }
  39     return numTransactions;
  40 }
  41
  42 void WalletModel::update()
  43 {
  44     qint64 newBalance = getBalance();
  45     qint64 newUnconfirmedBalance = getUnconfirmedBalance();
  46     int newNumTransactions = getNumTransactions();
  47     EncryptionStatus newEncryptionStatus = getEncryptionStatus();
  48
  49     if(cachedBalance != newBalance || cachedUnconfirmedBalance != newUnconfirmedBalance)
  50         emit balanceChanged(newBalance, newUnconfirmedBalance);
  51
  52     if(cachedNumTransactions != newNumTransactions)
  53         emit numTransactionsChanged(newNumTransactions);
  54
  55     if(cachedEncryptionStatus != newEncryptionStatus)
  56         emit encryptionStatusChanged(newEncryptionStatus);
  57
  58     cachedBalance = newBalance;
  59     cachedUnconfirmedBalance = newUnconfirmedBalance;
  60     cachedNumTransactions = newNumTransactions;
  61
  62     addressTableModel->update();
  63 }
  64
  65 void WalletModel::updateAddressList()
  66 {
  67     addressTableModel->update();
  68 }
  69
  70 bool WalletModel::validateAddress(const QString &address)
  71 {
  72     CBitcoinAddress addressParsed(address.toStdString());
  73     return addressParsed.IsValid();
  74 }
  75
  76 WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipient> &recipients)
  77 {
  78     qint64 total = 0;
  79     QSet<QString> setAddress;
  80     QString hex;
  81
  82     if(recipients.empty())
  83     {
  84         return OK;
  85     }
  86
  87     // Pre-check input data for validity
  88     foreach(const SendCoinsRecipient &rcp, recipients)
  89     {
  90         if(!validateAddress(rcp.address))
  91         {
  92             return InvalidAddress;
  93         }
  94         setAddress.insert(rcp.address);
  95
  96         if(rcp.amount <= 0)
  97         {
  98             return InvalidAmount;
  99         }
 100         total += rcp.amount;
 101     }
 102
 103     if(recipients.size() > setAddress.size())
 104     {
 105         return DuplicateAddress;
 106     }
 107
 108     if(total > getBalance())
 109     {
 110         return AmountExceedsBalance;
 111     }
 112
 113     if((total + nTransactionFee) > getBalance())
 114     {
 115         return SendCoinsReturn(AmountWithFeeExceedsBalance, nTransactionFee);
 116     }
 117
 118     {
 119         LOCK2(cs_main, wallet->cs_wallet);
 120
 121         // Sendmany
 122         std::vector<std::pair<CScript, int64> > vecSend;
 123         foreach(const SendCoinsRecipient &rcp, recipients)
 124         {
 125             CScript scriptPubKey;
 126             scriptPubKey.SetBitcoinAddress(rcp.address.toStdString());
 127             vecSend.push_back(make_pair(scriptPubKey, rcp.amount));
 128         }
 129
 130         CWalletTx wtx;
 131         CReserveKey keyChange(wallet);
 132         int64 nFeeRequired = 0;
 133         bool fCreated = wallet->CreateTransaction(vecSend, wtx, keyChange, nFeeRequired);
 134
 135         if(!fCreated)
 136         {
 137             if((total + nFeeRequired) > wallet->GetBalance())
 138             {
 139                 return SendCoinsReturn(AmountWithFeeExceedsBalance, nFeeRequired);
 140             }
 141             return TransactionCreationFailed;
 142         }
 143         if(!ThreadSafeAskFee(nFeeRequired, tr("Sending...").toStdString()))
 144         {
 145             return Aborted;
 146         }
 147         if(!wallet->CommitTransaction(wtx, keyChange))
 148         {
 149             return TransactionCommitFailed;
 150         }
 151         hex = QString::fromStdString(wtx.GetHash().GetHex());
 152     }
 153
 154     // Add addresses that we've sent to to the address book
 155     foreach(const SendCoinsRecipient &rcp, recipients)
 156     {
 157         std::string strAddress = rcp.address.toStdString();
 158         {
 159             LOCK(wallet->cs_wallet);
 160             if (!wallet->mapAddressBook.count(strAddress))
 161                 wallet->SetAddressBookName(strAddress, rcp.label.toStdString());
 162         }
 163     }
 164
 165     return SendCoinsReturn(OK, 0, hex);
 166 }
 167
 168 OptionsModel *WalletModel::getOptionsModel()
 169 {
 170     return optionsModel;
 171 }
 172
 173 AddressTableModel *WalletModel::getAddressTableModel()
 174 {
 175     return addressTableModel;
 176 }
 177
 178 TransactionTableModel *WalletModel::getTransactionTableModel()
 179 {
 180     return transactionTableModel;
 181 }
 182
 183 WalletModel::EncryptionStatus WalletModel::getEncryptionStatus() const
 184 {
 185     if(!wallet->IsCrypted())
 186     {
 187         return Unencrypted;
 188     }
 189     else if(wallet->IsLocked())
 190     {
 191         return Locked;
 192     }
 193     else
 194     {
 195         return Unlocked;
 196     }
 197 }
 198
 199 bool WalletModel::setWalletEncrypted(bool encrypted, const SecureString &passphrase)
 200 {
 201     if(encrypted)
 202     {
 203         // Encrypt
 204         return wallet->EncryptWallet(passphrase);
 205     }
 206     else
 207     {
 208         // Decrypt -- TODO; not supported yet
 209         return false;
 210     }
 211 }
 212
 213 bool WalletModel::setWalletLocked(bool locked, const SecureString &passPhrase)
 214 {
 215     if(locked)
 216     {
 217         // Lock
 218         return wallet->Lock();
 219     }
 220     else
 221     {
 222         // Unlock
 223         return wallet->Unlock(passPhrase);
 224     }
 225 }
 226
 227 bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureString &newPass)
 228 {
 229     bool retval;
 230     {
 231         LOCK(wallet->cs_wallet);
 232         wallet->Lock(); // Make sure wallet is locked before attempting pass change
 233         retval = wallet->ChangeWalletPassphrase(oldPass, newPass);
 234     }
 235     return retval;
 236 }
 237
 238 bool WalletModel::backupWallet(const QString &filename)
 239 {
 240     return BackupWallet(*wallet, filename.toLocal8Bit().data());
 241 }
 242
 243 // WalletModel::UnlockContext implementation
 244 WalletModel::UnlockContext WalletModel::requestUnlock()
 245 {
 246     bool was_locked = getEncryptionStatus() == Locked;
 247     if(was_locked)
 248     {
 249         // Request UI to unlock wallet
 250         emit requireUnlock();
 251     }
 252     // If wallet is still locked, unlock was failed or cancelled, mark context as invalid
 253     bool valid = getEncryptionStatus() != Locked;
 254
 255     return UnlockContext(this, valid, was_locked);
 256 }
 257
 258 WalletModel::UnlockContext::UnlockContext(WalletModel *wallet, bool valid, bool relock):
 259         wallet(wallet),
 260         valid(valid),
 261         relock(relock)
 262 {
 263 }
 264
 265 WalletModel::UnlockContext::~UnlockContext()
 266 {
 267     if(valid && relock)
 268     {
 269         wallet->setWalletLocked(true);
 270     }
 271 }
 272
 273 void WalletModel::UnlockContext::CopyFrom(const UnlockContext& rhs)
 274 {
 275     // Transfer context; old object no longer relocks wallet
 276     *this = rhs;
 277     rhs.relock = false;
 278 }