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// Copyright (c) 2011-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "walletmodel.h"
#include "addresstablemodel.h"
#include "consensus/validation.h"
#include "guiconstants.h"
#include "guiutil.h"
#include "paymentserver.h"
#include "recentrequeststablemodel.h"
#include "transactiontablemodel.h"
#include "base58.h"
#include "chain.h"
#include "keystore.h"
#include "validation.h"
#include "net.h" // for g_connman
#include "sync.h"
#include "ui_interface.h"
#include "util.h" // for GetBoolArg
#include "wallet/wallet.h"
#include "wallet/walletdb.h" // for BackupWallet
#include <stdint.h>
#include <QDebug>
#include <QSet>
#include <QTimer>
#include <boost/foreach.hpp>
WalletModel::WalletModel(const PlatformStyle *platformStyle, CWallet *_wallet, OptionsModel *_optionsModel, QObject *parent) :
QObject(parent), wallet(_wallet), optionsModel(_optionsModel), addressTableModel(0),
transactionTableModel(0),
recentRequestsTableModel(0),
cachedBalance(0), cachedUnconfirmedBalance(0), cachedImmatureBalance(0),
cachedEncryptionStatus(Unencrypted),
cachedNumBlocks(0)
{
fHaveWatchOnly = wallet->HaveWatchOnly();
fForceCheckBalanceChanged = false;
addressTableModel = new AddressTableModel(wallet, this);
transactionTableModel = new TransactionTableModel(platformStyle, wallet, this);
recentRequestsTableModel = new RecentRequestsTableModel(wallet, this);
// This timer will be fired repeatedly to update the balance
pollTimer = new QTimer(this);
connect(pollTimer, SIGNAL(timeout()), this, SLOT(pollBalanceChanged()));
pollTimer->start(MODEL_UPDATE_DELAY);
subscribeToCoreSignals();
}
WalletModel::~WalletModel()
{
unsubscribeFromCoreSignals();
}
CAmount WalletModel::getBalance(const CCoinControl *coinControl) const
{
if (coinControl)
{
CAmount nBalance = 0;
std::vector<COutput> vCoins;
wallet->AvailableCoins(vCoins, true, coinControl);
BOOST_FOREACH(const COutput& out, vCoins)
if(out.fSpendable)
nBalance += out.tx->tx->vout[out.i].nValue;
return nBalance;
}
return wallet->GetBalance();
}
CAmount WalletModel::getUnconfirmedBalance() const
{
return wallet->GetUnconfirmedBalance();
}
CAmount WalletModel::getImmatureBalance() const
{
return wallet->GetImmatureBalance();
}
bool WalletModel::haveWatchOnly() const
{
return fHaveWatchOnly;
}
CAmount WalletModel::getWatchBalance() const
{
return wallet->GetWatchOnlyBalance();
}
CAmount WalletModel::getWatchUnconfirmedBalance() const
{
return wallet->GetUnconfirmedWatchOnlyBalance();
}
CAmount WalletModel::getWatchImmatureBalance() const
{
return wallet->GetImmatureWatchOnlyBalance();
}
void WalletModel::updateStatus()
{
EncryptionStatus newEncryptionStatus = getEncryptionStatus();
if(cachedEncryptionStatus != newEncryptionStatus)
Q_EMIT encryptionStatusChanged(newEncryptionStatus);
}
void WalletModel::pollBalanceChanged()
{
// Get required locks upfront. This avoids the GUI from getting stuck on
// periodical polls if the core is holding the locks for a longer time -
// for example, during a wallet rescan.
TRY_LOCK(cs_main, lockMain);
if(!lockMain)
return;
TRY_LOCK(wallet->cs_wallet, lockWallet);
if(!lockWallet)
return;
if(fForceCheckBalanceChanged || chainActive.Height() != cachedNumBlocks)
{
fForceCheckBalanceChanged = false;
// Balance and number of transactions might have changed
cachedNumBlocks = chainActive.Height();
checkBalanceChanged();
if(transactionTableModel)
transactionTableModel->updateConfirmations();
}
}
void WalletModel::checkBalanceChanged()
{
CAmount newBalance = getBalance();
CAmount newUnconfirmedBalance = getUnconfirmedBalance();
CAmount newImmatureBalance = getImmatureBalance();
CAmount newWatchOnlyBalance = 0;
CAmount newWatchUnconfBalance = 0;
CAmount newWatchImmatureBalance = 0;
if (haveWatchOnly())
{
newWatchOnlyBalance = getWatchBalance();
newWatchUnconfBalance = getWatchUnconfirmedBalance();
newWatchImmatureBalance = getWatchImmatureBalance();
}
if(cachedBalance != newBalance || cachedUnconfirmedBalance != newUnconfirmedBalance || cachedImmatureBalance != newImmatureBalance ||
cachedWatchOnlyBalance != newWatchOnlyBalance || cachedWatchUnconfBalance != newWatchUnconfBalance || cachedWatchImmatureBalance != newWatchImmatureBalance)
{
cachedBalance = newBalance;
cachedUnconfirmedBalance = newUnconfirmedBalance;
cachedImmatureBalance = newImmatureBalance;
cachedWatchOnlyBalance = newWatchOnlyBalance;
cachedWatchUnconfBalance = newWatchUnconfBalance;
cachedWatchImmatureBalance = newWatchImmatureBalance;
Q_EMIT balanceChanged(newBalance, newUnconfirmedBalance, newImmatureBalance,
newWatchOnlyBalance, newWatchUnconfBalance, newWatchImmatureBalance);
}
}
void WalletModel::updateTransaction()
{
// Balance and number of transactions might have changed
fForceCheckBalanceChanged = true;
}
void WalletModel::updateAddressBook(const QString &address, const QString &label,
bool isMine, const QString &purpose, int status)
{
if(addressTableModel)
addressTableModel->updateEntry(address, label, isMine, purpose, status);
}
void WalletModel::updateWatchOnlyFlag(bool fHaveWatchonly)
{
fHaveWatchOnly = fHaveWatchonly;
Q_EMIT notifyWatchonlyChanged(fHaveWatchonly);
}
bool WalletModel::validateAddress(const QString &address)
{
CBitcoinAddress addressParsed(address.toStdString());
return addressParsed.IsValid();
}
WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransaction &transaction, const CCoinControl *coinControl)
{
CAmount total = 0;
bool fSubtractFeeFromAmount = false;
QList<SendCoinsRecipient> recipients = transaction.getRecipients();
std::vector<CRecipient> vecSend;
if(recipients.empty())
{
return OK;
}
QSet<QString> setAddress; // Used to detect duplicates
int nAddresses = 0;
// Pre-check input data for validity
Q_FOREACH(const SendCoinsRecipient &rcp, recipients)
{
if (rcp.fSubtractFeeFromAmount)
fSubtractFeeFromAmount = true;
if (rcp.paymentRequest.IsInitialized())
{ // PaymentRequest...
CAmount subtotal = 0;
const payments::PaymentDetails& details = rcp.paymentRequest.getDetails();
for (int i = 0; i < details.outputs_size(); i++)
{
const payments::Output& out = details.outputs(i);
if (out.amount() <= 0) continue;
subtotal += out.amount();
const unsigned char* scriptStr = (const unsigned char*)out.script().data();
CScript scriptPubKey(scriptStr, scriptStr+out.script().size());
CAmount nAmount = out.amount();
CRecipient recipient = {scriptPubKey, nAmount, rcp.fSubtractFeeFromAmount};
vecSend.push_back(recipient);
}
if (subtotal <= 0)
{
return InvalidAmount;
}
total += subtotal;
}
else
{ // User-entered bitcoin address / amount:
if(!validateAddress(rcp.address))
{
return InvalidAddress;
}
if(rcp.amount <= 0)
{
return InvalidAmount;
}
setAddress.insert(rcp.address);
++nAddresses;
CScript scriptPubKey = GetScriptForDestination(CBitcoinAddress(rcp.address.toStdString()).Get());
CRecipient recipient = {scriptPubKey, rcp.amount, rcp.fSubtractFeeFromAmount};
vecSend.push_back(recipient);
total += rcp.amount;
}
}
if(setAddress.size() != nAddresses)
{
return DuplicateAddress;
}
CAmount nBalance = getBalance(coinControl);
if(total > nBalance)
{
return AmountExceedsBalance;
}
{
LOCK2(cs_main, wallet->cs_wallet);
transaction.newPossibleKeyChange(wallet);
CAmount nFeeRequired = 0;
int nChangePosRet = -1;
std::string strFailReason;
CWalletTx *newTx = transaction.getTransaction();
CReserveKey *keyChange = transaction.getPossibleKeyChange();
bool fCreated = wallet->CreateTransaction(vecSend, *newTx, *keyChange, nFeeRequired, nChangePosRet, strFailReason, coinControl);
transaction.setTransactionFee(nFeeRequired);
if (fSubtractFeeFromAmount && fCreated)
transaction.reassignAmounts(nChangePosRet);
if(!fCreated)
{
if(!fSubtractFeeFromAmount && (total + nFeeRequired) > nBalance)
{
return SendCoinsReturn(AmountWithFeeExceedsBalance);
}
Q_EMIT message(tr("Send Coins"), QString::fromStdString(strFailReason),
CClientUIInterface::MSG_ERROR);
return TransactionCreationFailed;
}
// reject absurdly high fee. (This can never happen because the
// wallet caps the fee at maxTxFee. This merely serves as a
// belt-and-suspenders check)
if (nFeeRequired > maxTxFee)
return AbsurdFee;
}
return SendCoinsReturn(OK);
}
WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &transaction)
{
QByteArray transaction_array; /* store serialized transaction */
{
LOCK2(cs_main, wallet->cs_wallet);
CWalletTx *newTx = transaction.getTransaction();
Q_FOREACH(const SendCoinsRecipient &rcp, transaction.getRecipients())
{
if (rcp.paymentRequest.IsInitialized())
{
// Make sure any payment requests involved are still valid.
if (PaymentServer::verifyExpired(rcp.paymentRequest.getDetails())) {
return PaymentRequestExpired;
}
// Store PaymentRequests in wtx.vOrderForm in wallet.
std::string key("PaymentRequest");
std::string value;
rcp.paymentRequest.SerializeToString(&value);
newTx->vOrderForm.push_back(make_pair(key, value));
}
else if (!rcp.message.isEmpty()) // Message from normal bitcoin:URI (bitcoin:123...?message=example)
newTx->vOrderForm.push_back(make_pair("Message", rcp.message.toStdString()));
}
CReserveKey *keyChange = transaction.getPossibleKeyChange();
CValidationState state;
if(!wallet->CommitTransaction(*newTx, *keyChange, g_connman.get(), state))
return SendCoinsReturn(TransactionCommitFailed, QString::fromStdString(state.GetRejectReason()));
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << *newTx->tx;
transaction_array.append(&(ssTx[0]), ssTx.size());
}
// Add addresses / update labels that we've sent to to the address book,
// and emit coinsSent signal for each recipient
Q_FOREACH(const SendCoinsRecipient &rcp, transaction.getRecipients())
{
// Don't touch the address book when we have a payment request
if (!rcp.paymentRequest.IsInitialized())
{
std::string strAddress = rcp.address.toStdString();
CTxDestination dest = CBitcoinAddress(strAddress).Get();
std::string strLabel = rcp.label.toStdString();
{
LOCK(wallet->cs_wallet);
std::map<CTxDestination, CAddressBookData>::iterator mi = wallet->mapAddressBook.find(dest);
// Check if we have a new address or an updated label
if (mi == wallet->mapAddressBook.end())
{
wallet->SetAddressBook(dest, strLabel, "send");
}
else if (mi->second.name != strLabel)
{
wallet->SetAddressBook(dest, strLabel, ""); // "" means don't change purpose
}
}
}
Q_EMIT coinsSent(wallet, rcp, transaction_array);
}
checkBalanceChanged(); // update balance immediately, otherwise there could be a short noticeable delay until pollBalanceChanged hits
return SendCoinsReturn(OK);
}
OptionsModel *WalletModel::getOptionsModel()
{
return optionsModel;
}
AddressTableModel *WalletModel::getAddressTableModel()
{
return addressTableModel;
}
TransactionTableModel *WalletModel::getTransactionTableModel()
{
return transactionTableModel;
}
RecentRequestsTableModel *WalletModel::getRecentRequestsTableModel()
{
return recentRequestsTableModel;
}
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;
{
LOCK(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 wallet->BackupWallet(filename.toLocal8Bit().data());
}
// Handlers for core signals
static void NotifyKeyStoreStatusChanged(WalletModel *walletmodel, CCryptoKeyStore *wallet)
{
qDebug() << "NotifyKeyStoreStatusChanged";
QMetaObject::invokeMethod(walletmodel, "updateStatus", Qt::QueuedConnection);
}
static void NotifyAddressBookChanged(WalletModel *walletmodel, CWallet *wallet,
const CTxDestination &address, const std::string &label, bool isMine,
const std::string &purpose, ChangeType status)
{
QString strAddress = QString::fromStdString(CBitcoinAddress(address).ToString());
QString strLabel = QString::fromStdString(label);
QString strPurpose = QString::fromStdString(purpose);
qDebug() << "NotifyAddressBookChanged: " + strAddress + " " + strLabel + " isMine=" + QString::number(isMine) + " purpose=" + strPurpose + " status=" + QString::number(status);
QMetaObject::invokeMethod(walletmodel, "updateAddressBook", Qt::QueuedConnection,
Q_ARG(QString, strAddress),
Q_ARG(QString, strLabel),
Q_ARG(bool, isMine),
Q_ARG(QString, strPurpose),
Q_ARG(int, status));
}
static void NotifyTransactionChanged(WalletModel *walletmodel, CWallet *wallet, const uint256 &hash, ChangeType status)
{
Q_UNUSED(wallet);
Q_UNUSED(hash);
Q_UNUSED(status);
QMetaObject::invokeMethod(walletmodel, "updateTransaction", Qt::QueuedConnection);
}
static void ShowProgress(WalletModel *walletmodel, const std::string &title, int nProgress)
{
// emits signal "showProgress"
QMetaObject::invokeMethod(walletmodel, "showProgress", Qt::QueuedConnection,
Q_ARG(QString, QString::fromStdString(title)),
Q_ARG(int, nProgress));
}
static void NotifyWatchonlyChanged(WalletModel *walletmodel, bool fHaveWatchonly)
{
QMetaObject::invokeMethod(walletmodel, "updateWatchOnlyFlag", Qt::QueuedConnection,
Q_ARG(bool, fHaveWatchonly));
}
void WalletModel::subscribeToCoreSignals()
{
// Connect signals to wallet
wallet->NotifyStatusChanged.connect(boost::bind(&NotifyKeyStoreStatusChanged, this, _1));
wallet->NotifyAddressBookChanged.connect(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5, _6));
wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
wallet->NotifyWatchonlyChanged.connect(boost::bind(NotifyWatchonlyChanged, this, _1));
}
void WalletModel::unsubscribeFromCoreSignals()
{
// Disconnect signals from wallet
wallet->NotifyStatusChanged.disconnect(boost::bind(&NotifyKeyStoreStatusChanged, this, _1));
wallet->NotifyAddressBookChanged.disconnect(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5, _6));
wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
wallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
wallet->NotifyWatchonlyChanged.disconnect(boost::bind(NotifyWatchonlyChanged, this, _1));
}
// WalletModel::UnlockContext implementation
WalletModel::UnlockContext WalletModel::requestUnlock()
{
bool was_locked = getEncryptionStatus() == Locked;
if(was_locked)
{
// Request UI to unlock wallet
Q_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;
}
bool WalletModel::getPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const
{
return wallet->GetPubKey(address, vchPubKeyOut);
}
bool WalletModel::havePrivKey(const CKeyID &address) const
{
return wallet->HaveKey(address);
}
bool WalletModel::getPrivKey(const CKeyID &address, CKey& vchPrivKeyOut) const
{
return wallet->GetKey(address, vchPrivKeyOut);
}
// returns a list of COutputs from COutPoints
void WalletModel::getOutputs(const std::vector<COutPoint>& vOutpoints, std::vector<COutput>& vOutputs)
{
LOCK2(cs_main, wallet->cs_wallet);
BOOST_FOREACH(const COutPoint& outpoint, vOutpoints)
{
if (!wallet->mapWallet.count(outpoint.hash)) continue;
int nDepth = wallet->mapWallet[outpoint.hash].GetDepthInMainChain();
if (nDepth < 0) continue;
COutput out(&wallet->mapWallet[outpoint.hash], outpoint.n, nDepth, true /* spendable */, true /* solvable */, true /* safe */);
vOutputs.push_back(out);
}
}
bool WalletModel::isSpent(const COutPoint& outpoint) const
{
LOCK2(cs_main, wallet->cs_wallet);
return wallet->IsSpent(outpoint.hash, outpoint.n);
}
// AvailableCoins + LockedCoins grouped by wallet address (put change in one group with wallet address)
void WalletModel::listCoins(std::map<QString, std::vector<COutput> >& mapCoins) const
{
std::vector<COutput> vCoins;
wallet->AvailableCoins(vCoins);
LOCK2(cs_main, wallet->cs_wallet); // ListLockedCoins, mapWallet
std::vector<COutPoint> vLockedCoins;
wallet->ListLockedCoins(vLockedCoins);
// add locked coins
BOOST_FOREACH(const COutPoint& outpoint, vLockedCoins)
{
if (!wallet->mapWallet.count(outpoint.hash)) continue;
int nDepth = wallet->mapWallet[outpoint.hash].GetDepthInMainChain();
if (nDepth < 0) continue;
COutput out(&wallet->mapWallet[outpoint.hash], outpoint.n, nDepth, true /* spendable */, true /* solvable */, true /* safe */);
if (outpoint.n < out.tx->tx->vout.size() && wallet->IsMine(out.tx->tx->vout[outpoint.n]) == ISMINE_SPENDABLE)
vCoins.push_back(out);
}
BOOST_FOREACH(const COutput& out, vCoins)
{
COutput cout = out;
while (wallet->IsChange(cout.tx->tx->vout[cout.i]) && cout.tx->tx->vin.size() > 0 && wallet->IsMine(cout.tx->tx->vin[0]))
{
if (!wallet->mapWallet.count(cout.tx->tx->vin[0].prevout.hash)) break;
cout = COutput(&wallet->mapWallet[cout.tx->tx->vin[0].prevout.hash], cout.tx->tx->vin[0].prevout.n, 0 /* depth */, true /* spendable */, true /* solvable */, true /* safe */);
}
CTxDestination address;
if(!out.fSpendable || !ExtractDestination(cout.tx->tx->vout[cout.i].scriptPubKey, address))
continue;
mapCoins[QString::fromStdString(CBitcoinAddress(address).ToString())].push_back(out);
}
}
bool WalletModel::isLockedCoin(uint256 hash, unsigned int n) const
{
LOCK2(cs_main, wallet->cs_wallet);
return wallet->IsLockedCoin(hash, n);
}
void WalletModel::lockCoin(COutPoint& output)
{
LOCK2(cs_main, wallet->cs_wallet);
wallet->LockCoin(output);
}
void WalletModel::unlockCoin(COutPoint& output)
{
LOCK2(cs_main, wallet->cs_wallet);
wallet->UnlockCoin(output);
}
void WalletModel::listLockedCoins(std::vector<COutPoint>& vOutpts)
{
LOCK2(cs_main, wallet->cs_wallet);
wallet->ListLockedCoins(vOutpts);
}
void WalletModel::loadReceiveRequests(std::vector<std::string>& vReceiveRequests)
{
LOCK(wallet->cs_wallet);
BOOST_FOREACH(const PAIRTYPE(CTxDestination, CAddressBookData)& item, wallet->mapAddressBook)
BOOST_FOREACH(const PAIRTYPE(std::string, std::string)& item2, item.second.destdata)
if (item2.first.size() > 2 && item2.first.substr(0,2) == "rr") // receive request
vReceiveRequests.push_back(item2.second);
}
bool WalletModel::saveReceiveRequest(const std::string &sAddress, const int64_t nId, const std::string &sRequest)
{
CTxDestination dest = CBitcoinAddress(sAddress).Get();
std::stringstream ss;
ss << nId;
std::string key = "rr" + ss.str(); // "rr" prefix = "receive request" in destdata
LOCK(wallet->cs_wallet);
if (sRequest.empty())
return wallet->EraseDestData(dest, key);
else
return wallet->AddDestData(dest, key, sRequest);
}
bool WalletModel::transactionCanBeAbandoned(uint256 hash) const
{
LOCK2(cs_main, wallet->cs_wallet);
const CWalletTx *wtx = wallet->GetWalletTx(hash);
if (!wtx || wtx->isAbandoned() || wtx->GetDepthInMainChain() > 0 || wtx->InMempool())
return false;
return true;
}
bool WalletModel::abandonTransaction(uint256 hash) const
{
LOCK2(cs_main, wallet->cs_wallet);
return wallet->AbandonTransaction(hash);
}
bool WalletModel::isWalletEnabled()
{
return !GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET);
}
bool WalletModel::hdEnabled() const
{
return wallet->IsHDEnabled();
}
int WalletModel::getDefaultConfirmTarget() const
{
return nTxConfirmTarget;
}
bool WalletModel::getDefaultWalletRbf() const
{
return fWalletRbf;
}