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 <QTimer>
  11 #include <QSet>
  12
  13 WalletModel::WalletModel(CWallet *wallet, OptionsModel *optionsModel, QObject *parent) :
  14     QObject(parent), wallet(wallet), optionsModel(optionsModel), addressTableModel(0),
  15     transactionTableModel(0),
  16     cachedBalance(0), cachedUnconfirmedBalance(0), cachedNumTransactions(0),
  17     cachedEncryptionStatus(Unencrypted)
  18 {
  19     // Until signal notifications is built into the bitcoin core,
  20     //  simply update everything after polling using a timer.
  21     QTimer *timer = new QTimer(this);
  22     connect(timer, SIGNAL(timeout()), this, SLOT(update()));
  23     timer->start(MODEL_UPDATE_DELAY);
  24
  25     addressTableModel = new AddressTableModel(wallet, this);
  26     transactionTableModel = new TransactionTableModel(wallet, this);
  27 }
  28
  29 qint64 WalletModel::getBalance() const
  30 {
  31     return wallet->GetBalance();
  32 }
  33
  34 qint64 WalletModel::getUnconfirmedBalance() const
  35 {
  36     return wallet->GetUnconfirmedBalance();
  37 }
  38
  39 int WalletModel::getNumTransactions() const
  40 {
  41     int numTransactions = 0;
  42     CRITICAL_BLOCK(wallet->cs_wallet)
  43     {
  44         numTransactions = wallet->mapWallet.size();
  45     }
  46     return numTransactions;
  47 }
  48
  49 void WalletModel::update()
  50 {
  51     qint64 newBalance = getBalance();
  52     qint64 newUnconfirmedBalance = getUnconfirmedBalance();
  53     int newNumTransactions = getNumTransactions();
  54     EncryptionStatus newEncryptionStatus = getEncryptionStatus();
  55
  56     if(cachedBalance != newBalance || cachedUnconfirmedBalance != newUnconfirmedBalance)
  57         emit balanceChanged(newBalance, newUnconfirmedBalance);
  58
  59     if(cachedNumTransactions != newNumTransactions)
  60         emit numTransactionsChanged(newNumTransactions);
  61
  62     if(cachedEncryptionStatus != newEncryptionStatus)
  63         emit encryptionStatusChanged(newEncryptionStatus);
  64
  65     cachedBalance = newBalance;
  66     cachedUnconfirmedBalance = newUnconfirmedBalance;
  67     cachedNumTransactions = newNumTransactions;
  68
  69     addressTableModel->update();
  70 }
  71
  72 bool WalletModel::validateAddress(const QString &address)
  73 {
  74     CBitcoinAddress addressParsed(address.toStdString());
  75     return addressParsed.IsValid();
  76 }
  77
  78 WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipient> &recipients)
  79 {
  80     qint64 total = 0;
  81     QSet<QString> setAddress;
  82     QString hex;
  83
  84     if(recipients.empty())
  85     {
  86         return OK;
  87     }
  88
  89     // Pre-check input data for validity
  90     foreach(const SendCoinsRecipient &rcp, recipients)
  91     {
  92         if(!validateAddress(rcp.address))
  93         {
  94             return InvalidAddress;
  95         }
  96         setAddress.insert(rcp.address);
  97
  98         if(rcp.amount <= 0)
  99         {
 100             return InvalidAmount;
 101         }
 102         total += rcp.amount;
 103     }
 104
 105     if(recipients.size() > setAddress.size())
 106     {
 107         return DuplicateAddress;
 108     }
 109
 110     if(total > getBalance())
 111     {
 112         return AmountExceedsBalance;
 113     }
 114
 115     if((total + nTransactionFee) > getBalance())
 116     {
 117         return SendCoinsReturn(AmountWithFeeExceedsBalance, nTransactionFee);
 118     }
 119
 120     CRITICAL_BLOCK(cs_main)
 121     CRITICAL_BLOCK(wallet->cs_wallet)
 122     {
 123         // Sendmany
 124         std::vector<std::pair<CScript, int64> > vecSend;
 125         foreach(const SendCoinsRecipient &rcp, recipients)
 126         {
 127             CScript scriptPubKey;
 128             scriptPubKey.SetBitcoinAddress(rcp.address.toStdString());
 129             vecSend.push_back(make_pair(scriptPubKey, rcp.amount));
 130         }
 131
 132         CWalletTx wtx;
 133         CReserveKey keyChange(wallet);
 134         int64 nFeeRequired = 0;
 135         bool fCreated = wallet->CreateTransaction(vecSend, wtx, keyChange, nFeeRequired);
 136
 137         if(!fCreated)
 138         {
 139             if((total + nFeeRequired) > wallet->GetBalance())
 140             {
 141                 return SendCoinsReturn(AmountWithFeeExceedsBalance, nFeeRequired);
 142             }
 143             return TransactionCreationFailed;
 144         }
 145         if(!ThreadSafeAskFee(nFeeRequired, tr("Sending...").toStdString(), NULL))
 146         {
 147             return Aborted;
 148         }
 149         if(!wallet->CommitTransaction(wtx, keyChange))
 150         {
 151             return TransactionCommitFailed;
 152         }
 153         hex = QString::fromStdString(wtx.GetHash().GetHex());
 154     }
 155
 156     // Add addresses / update labels that we've sent to to the address book
 157     foreach(const SendCoinsRecipient &rcp, recipients)
 158     {
 159         std::string strAddress = rcp.address.toStdString();
 160         std::string strLabel = rcp.label.toStdString();
 161         CRITICAL_BLOCK(wallet->cs_wallet)
 162         {
 163             std::map<CBitcoinAddress, std::string>::iterator mi = wallet->mapAddressBook.find(strAddress);
 164
 165             // Check if we have a new address or an updated label
 166             if (mi == wallet->mapAddressBook.end() || mi->second != strLabel)
 167             {
 168                 wallet->SetAddressBookName(strAddress, strLabel);
 169             }
 170         }
 171     }
 172
 173     // Update our model of the address table
 174     addressTableModel->updateList();
 175
 176     return SendCoinsReturn(OK, 0, hex);
 177 }
 178
 179 OptionsModel *WalletModel::getOptionsModel()
 180 {
 181     return optionsModel;
 182 }
 183
 184 AddressTableModel *WalletModel::getAddressTableModel()
 185 {
 186     return addressTableModel;
 187 }
 188
 189 TransactionTableModel *WalletModel::getTransactionTableModel()
 190 {
 191     return transactionTableModel;
 192 }
 193
 194 WalletModel::EncryptionStatus WalletModel::getEncryptionStatus() const
 195 {
 196     if(!wallet->IsCrypted())
 197     {
 198         return Unencrypted;
 199     }
 200     else if(wallet->IsLocked())
 201     {
 202         return Locked;
 203     }
 204     else
 205     {
 206         return Unlocked;
 207     }
 208 }
 209
 210 bool WalletModel::setWalletEncrypted(bool encrypted, const SecureString &passphrase)
 211 {
 212     if(encrypted)
 213     {
 214         // Encrypt
 215         return wallet->EncryptWallet(passphrase);
 216     }
 217     else
 218     {
 219         // Decrypt -- TODO; not supported yet
 220         return false;
 221     }
 222 }
 223
 224 bool WalletModel::setWalletLocked(bool locked, const SecureString &passPhrase)
 225 {
 226     if(locked)
 227     {
 228         // Lock
 229         return wallet->Lock();
 230     }
 231     else
 232     {
 233         // Unlock
 234         return wallet->Unlock(passPhrase);
 235     }
 236 }
 237
 238 bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureString &newPass)
 239 {
 240     bool retval;
 241     CRITICAL_BLOCK(wallet->cs_wallet)
 242     {
 243         wallet->Lock(); // Make sure wallet is locked before attempting pass change
 244         retval = wallet->ChangeWalletPassphrase(oldPass, newPass);
 245     }
 246     return retval;
 247 }
 248
 249 bool WalletModel::backupWallet(const QString &filename)
 250 {
 251     return BackupWallet(*wallet, filename.toLocal8Bit().data());
 252 }
 253
 254 // WalletModel::UnlockContext implementation
 255 WalletModel::UnlockContext WalletModel::requestUnlock()
 256 {
 257     bool was_locked = getEncryptionStatus() == Locked;
 258     if(was_locked)
 259     {
 260         // Request UI to unlock wallet
 261         emit requireUnlock();
 262     }
 263     // If wallet is still locked, unlock was failed or cancelled, mark context as invalid
 264     bool valid = getEncryptionStatus() != Locked;
 265
 266     return UnlockContext(this, valid, was_locked);
 267 }
 268
 269 WalletModel::UnlockContext::UnlockContext(WalletModel *wallet, bool valid, bool relock):
 270         wallet(wallet),
 271         valid(valid),
 272         relock(relock)
 273 {
 274 }
 275
 276 WalletModel::UnlockContext::~UnlockContext()
 277 {
 278     if(valid && relock)
 279     {
 280         wallet->setWalletLocked(true);
 281     }
 282 }
 283
 284 void WalletModel::UnlockContext::CopyFrom(const UnlockContext& rhs)
 285 {
 286     // Transfer context; old object no longer relocks wallet
 287     *this = rhs;
 288     rhs.relock = false;
 289 }