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 "ui_interface.h"
   8 #include "wallet.h"
   9 #include "walletdb.h" // for BackupWallet
  10
  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     addressTableModel = new AddressTableModel(wallet, this);
  20     transactionTableModel = new TransactionTableModel(wallet, this);
  21 }
  22
  23 qint64 WalletModel::getBalance() const
  24 {
  25     return wallet->GetBalance();
  26 }
  27
  28 qint64 WalletModel::getUnconfirmedBalance() const
  29 {
  30     return wallet->GetUnconfirmedBalance();
  31 }
  32
  33 int WalletModel::getNumTransactions() const
  34 {
  35     int numTransactions = 0;
  36     {
  37         LOCK(wallet->cs_wallet);
  38         numTransactions = wallet->mapWallet.size();
  39     }
  40     return numTransactions;
  41 }
  42
  43 void WalletModel::update()
  44 {
  45     qint64 newBalance = getBalance();
  46     qint64 newUnconfirmedBalance = getUnconfirmedBalance();
  47     int newNumTransactions = getNumTransactions();
  48     EncryptionStatus newEncryptionStatus = getEncryptionStatus();
  49
  50     if(cachedBalance != newBalance || cachedUnconfirmedBalance != newUnconfirmedBalance)
  51         emit balanceChanged(newBalance, newUnconfirmedBalance);
  52
  53     if(cachedNumTransactions != newNumTransactions)
  54         emit numTransactionsChanged(newNumTransactions);
  55
  56     if(cachedEncryptionStatus != newEncryptionStatus)
  57         emit encryptionStatusChanged(newEncryptionStatus);
  58
  59     cachedBalance = newBalance;
  60     cachedUnconfirmedBalance = newUnconfirmedBalance;
  61     cachedNumTransactions = newNumTransactions;
  62
  63     addressTableModel->update();
  64 }
  65
  66 void WalletModel::updateAddressList()
  67 {
  68     addressTableModel->update();
  69 }
  70
  71 bool WalletModel::validateAddress(const QString &address)
  72 {
  73     CBitcoinAddress addressParsed(address.toStdString());
  74     return addressParsed.IsValid();
  75 }
  76
  77 WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipient> &recipients)
  78 {
  79     qint64 total = 0;
  80     QSet<QString> setAddress;
  81     QString hex;
  82
  83     if(recipients.empty())
  84     {
  85         return OK;
  86     }
  87
  88     // Pre-check input data for validity
  89     foreach(const SendCoinsRecipient &rcp, recipients)
  90     {
  91         if(!validateAddress(rcp.address))
  92         {
  93             return InvalidAddress;
  94         }
  95         setAddress.insert(rcp.address);
  96
  97         if(rcp.amount <= 0)
  98         {
  99             return InvalidAmount;
 100         }
 101         total += rcp.amount;
 102     }
 103
 104     if(recipients.size() > setAddress.size())
 105     {
 106         return DuplicateAddress;
 107     }
 108
 109     if(total > getBalance())
 110     {
 111         return AmountExceedsBalance;
 112     }
 113
 114     if((total + nTransactionFee) > getBalance())
 115     {
 116         return SendCoinsReturn(AmountWithFeeExceedsBalance, nTransactionFee);
 117     }
 118
 119     {
 120         LOCK2(cs_main, wallet->cs_wallet);
 121
 122         // Sendmany
 123         std::vector<std::pair<CScript, int64> > vecSend;
 124         foreach(const SendCoinsRecipient &rcp, recipients)
 125         {
 126             CScript scriptPubKey;
 127             scriptPubKey.SetBitcoinAddress(rcp.address.toStdString());
 128             vecSend.push_back(make_pair(scriptPubKey, rcp.amount));
 129         }
 130
 131         CWalletTx wtx;
 132         CReserveKey keyChange(wallet);
 133         int64 nFeeRequired = 0;
 134         bool fCreated = wallet->CreateTransaction(vecSend, wtx, keyChange, nFeeRequired);
 135
 136         if(!fCreated)
 137         {
 138             if((total + nFeeRequired) > wallet->GetBalance())
 139             {
 140                 return SendCoinsReturn(AmountWithFeeExceedsBalance, nFeeRequired);
 141             }
 142             return TransactionCreationFailed;
 143         }
 144         if(!ThreadSafeAskFee(nFeeRequired, tr("Sending...").toStdString()))
 145         {
 146             return Aborted;
 147         }
 148         if(!wallet->CommitTransaction(wtx, keyChange))
 149         {
 150             return TransactionCommitFailed;
 151         }
 152         hex = QString::fromStdString(wtx.GetHash().GetHex());
 153     }
 154
 155     // Add addresses that we've sent to to the address book
 156     foreach(const SendCoinsRecipient &rcp, recipients)
 157     {
 158         std::string strAddress = rcp.address.toStdString();
 159         {
 160             LOCK(wallet->cs_wallet);
 161             if (!wallet->mapAddressBook.count(strAddress))
 162                 wallet->SetAddressBookName(strAddress, rcp.label.toStdString());
 163         }
 164     }
 165
 166     return SendCoinsReturn(OK, 0, hex);
 167 }
 168
 169 OptionsModel *WalletModel::getOptionsModel()
 170 {
 171     return optionsModel;
 172 }
 173
 174 AddressTableModel *WalletModel::getAddressTableModel()
 175 {
 176     return addressTableModel;
 177 }
 178
 179 TransactionTableModel *WalletModel::getTransactionTableModel()
 180 {
 181     return transactionTableModel;
 182 }
 183
 184 WalletModel::EncryptionStatus WalletModel::getEncryptionStatus() const
 185 {
 186     if(!wallet->IsCrypted())
 187     {
 188         return Unencrypted;
 189     }
 190     else if(wallet->IsLocked())
 191     {
 192         return Locked;
 193     }
 194     else
 195     {
 196         return Unlocked;
 197     }
 198 }
 199
 200 bool WalletModel::setWalletEncrypted(bool encrypted, const SecureString &passphrase)
 201 {
 202     if(encrypted)
 203     {
 204         // Encrypt
 205         return wallet->EncryptWallet(passphrase);
 206     }
 207     else
 208     {
 209         // Decrypt -- TODO; not supported yet
 210         return false;
 211     }
 212 }
 213
 214 bool WalletModel::setWalletLocked(bool locked, const SecureString &passPhrase)
 215 {
 216     if(locked)
 217     {
 218         // Lock
 219         return wallet->Lock();
 220     }
 221     else
 222     {
 223         // Unlock
 224         return wallet->Unlock(passPhrase);
 225     }
 226 }
 227
 228 bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureString &newPass)
 229 {
 230     bool retval;
 231     {
 232         LOCK(wallet->cs_wallet);
 233         wallet->Lock(); // Make sure wallet is locked before attempting pass change
 234         retval = wallet->ChangeWalletPassphrase(oldPass, newPass);
 235     }
 236     return retval;
 237 }
 238
 239 bool WalletModel::backupWallet(const QString &filename)
 240 {
 241     return BackupWallet(*wallet, filename.toLocal8Bit().data());
 242 }
 243
 244 // WalletModel::UnlockContext implementation
 245 WalletModel::UnlockContext WalletModel::requestUnlock()
 246 {
 247     bool was_locked = getEncryptionStatus() == Locked;
 248     if(was_locked)
 249     {
 250         // Request UI to unlock wallet
 251         emit requireUnlock();
 252     }
 253     // If wallet is still locked, unlock was failed or cancelled, mark context as invalid
 254     bool valid = getEncryptionStatus() != Locked;
 255
 256     return UnlockContext(this, valid, was_locked);
 257 }
 258
 259 WalletModel::UnlockContext::UnlockContext(WalletModel *wallet, bool valid, bool relock):
 260         wallet(wallet),
 261         valid(valid),
 262         relock(relock)
 263 {
 264 }
 265
 266 WalletModel::UnlockContext::~UnlockContext()
 267 {
 268     if(valid && relock)
 269     {
 270         wallet->setWalletLocked(true);
 271     }
 272 }
 273
 274 void WalletModel::UnlockContext::CopyFrom(const UnlockContext& rhs)
 275 {
 276     // Transfer context; old object no longer relocks wallet
 277     *this = rhs;
 278     rhs.relock = false;
 279 }