void MultisigDialog::updateAmounts()
{
// Update inputs amount
int64_t inputsAmount = 0;
for(int i = 0; i < ui->inputs->count(); i++)
{
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(i)->widget());
if(entry)
inputsAmount += entry->getAmount();
}
QString inputsAmountStr;
inputsAmountStr.sprintf("%.6f", (double) inputsAmount / COIN);
ui->inputsAmount->setText(inputsAmountStr);
// Update outputs amount
int64_t outputsAmount = 0;
for(int i = 0; i < ui->outputs->count(); i++)
{
SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(ui->outputs->itemAt(i)->widget());
if(entry)
outputsAmount += entry->getValue().amount;
}
QString outputsAmountStr;
outputsAmountStr.sprintf("%.6f", (double) outputsAmount / COIN);
ui->outputsAmount->setText(outputsAmountStr);
// Update Fee amount
int64_t fee = inputsAmount - outputsAmount;
QString feeStr;
feeStr.sprintf("%.6f", (double) fee / COIN);
ui->fee->setText(feeStr);
}
void MultisigDialog::setModel(WalletModel *model)
{
this->model = model;
for(int i = 0; i < ui->pubkeyEntries->count(); i++)
{
MultisigAddressEntry *entry = qobject_cast<MultisigAddressEntry *>(ui->pubkeyEntries->itemAt(i)->widget());
if(entry)
entry->setModel(model);
}
for(int i = 0; i < ui->inputs->count(); i++)
{
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(i)->widget());
if(entry)
entry->setModel(model);
}
for(int i = 0; i < ui->outputs->count(); i++)
{
SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(ui->outputs->itemAt(i)->widget());
if(entry)
entry->setModel(model);
}
}
void MultisigDialog::updateRemoveEnabled()
{
bool enabled = (ui->pubkeyEntries->count() > 2);
for(int i = 0; i < ui->pubkeyEntries->count(); i++)
{
MultisigAddressEntry *entry = qobject_cast<MultisigAddressEntry *>(ui->pubkeyEntries->itemAt(i)->widget());
if(entry)
entry->setRemoveEnabled(enabled);
}
QString maxSigsStr;
maxSigsStr.setNum(ui->pubkeyEntries->count());
ui->maxSignaturesLabel->setText(QString("/ ") + maxSigsStr);
enabled = (ui->inputs->count() > 1);
for(int i = 0; i < ui->inputs->count(); i++)
{
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(i)->widget());
if(entry)
entry->setRemoveEnabled(enabled);
}
enabled = (ui->outputs->count() > 1);
for(int i = 0; i < ui->outputs->count(); i++)
{
SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(ui->outputs->itemAt(i)->widget());
if(entry)
entry->setRemoveEnabled(enabled);
}
}
MultisigInputEntry * MultisigDialog::addInput()
{
MultisigInputEntry *entry = new MultisigInputEntry(this);
entry->setModel(model);
ui->inputs->addWidget(entry);
connect(entry, SIGNAL(removeEntry(MultisigInputEntry *)), this, SLOT(removeEntry(MultisigInputEntry *)));
connect(entry, SIGNAL(updateAmount()), this, SLOT(updateAmounts()));
updateRemoveEnabled();
entry->clear();
ui->scrollAreaWidgetContents_2->resize(ui->scrollAreaWidgetContents_2->sizeHint());
QScrollBar *bar = ui->scrollArea_2->verticalScrollBar();
if(bar)
bar->setSliderPosition(bar->maximum());
return entry;
}
void MultisigDialog::on_createTransactionButton_clicked()
{
CTransaction transaction;
// Get inputs
for(int i = 0; i < ui->inputs->count(); i++)
{
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(i)->widget());
if(entry)
{
if(entry->validate())
{
CTxIn input = entry->getInput();
transaction.vin.push_back(input);
}
else
return;
}
}
// Get outputs
for(int i = 0; i < ui->outputs->count(); i++)
{
SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(ui->outputs->itemAt(i)->widget());
if(entry)
{
if(entry->validate())
{
SendCoinsRecipient recipient = entry->getValue();
CBitcoinAddress address(recipient.address.toStdString());
CScript scriptPubKey;
scriptPubKey.SetDestination(address.Get());
int64_t amount = recipient.amount;
CTxOut output(amount, scriptPubKey);
transaction.vout.push_back(output);
}
else
return;
}
}
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
ss << transaction;
ui->transaction->setText(HexStr(ss.begin(), ss.end()).c_str());
}
void MultisigDialog::on_signTransactionButton_clicked()
{
ui->signedTransaction->clear();
if(!model)
return;
CWallet *wallet = model->getWallet();
// Decode the raw transaction
std::vector<unsigned char> txData(ParseHex(ui->transaction->text().toStdString()));
CDataStream ss(txData, SER_NETWORK, PROTOCOL_VERSION);
CTransaction tx;
try
{
ss >> tx;
}
catch(std::exception &e)
{
(void)e;
return;
}
CTransaction mergedTx(tx);
// Fetch previous transactions (inputs)
std::map<COutPoint, CScript> mapPrevOut;
for(unsigned int i = 0; i < mergedTx.vin.size(); i++)
{
CTransaction tempTx;
MapPrevTx mapPrevTx;
CTxDB txdb("r");
std::map<uint256, CTxIndex> unused;
bool fInvalid;
tempTx.vin.push_back(mergedTx.vin[i]);
tempTx.FetchInputs(txdb, unused, false, false, mapPrevTx, fInvalid);
BOOST_FOREACH(const CTxIn& txin, tempTx.vin)
{
const uint256& prevHash = txin.prevout.hash;
if(mapPrevTx.count(prevHash) && mapPrevTx[prevHash].second.vout.size() > txin.prevout.n)
mapPrevOut[txin.prevout] = mapPrevTx[prevHash].second.vout[txin.prevout.n].scriptPubKey;
}
}
// Add the redeem scripts to the wallet keystore
for(int i = 0; i < ui->inputs->count(); i++)
{
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(i)->widget());
if(entry)
{
QString redeemScriptStr = entry->getRedeemScript();
if(redeemScriptStr.size() > 0)
{
std::vector<unsigned char> scriptData(ParseHex(redeemScriptStr.toStdString()));
CScript redeemScript(scriptData.begin(), scriptData.end());
wallet->AddCScript(redeemScript);
}
}
}
WalletModel::UnlockContext ctx(model->requestUnlock());
if(!ctx.isValid())
return;
// Sign what we can
bool fComplete = true;
for(unsigned int i = 0; i < mergedTx.vin.size(); i++)
{
CTxIn& txin = mergedTx.vin[i];
if(mapPrevOut.count(txin.prevout) == 0)
{
fComplete = false;
continue;
}
const CScript& prevPubKey = mapPrevOut[txin.prevout];
txin.scriptSig.clear();
SignSignature(*wallet, prevPubKey, mergedTx, i, SIGHASH_ALL);
txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, tx.vin[i].scriptSig);
if(!VerifyScript(txin.scriptSig, prevPubKey, mergedTx, i, true, 0))
{
fComplete = false;
}
}
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << mergedTx;
ui->signedTransaction->setText(HexStr(ssTx.begin(), ssTx.end()).c_str());
if(fComplete)
{
ui->statusLabel->setText(tr("Transaction signature is complete"));
ui->sendTransactionButton->setEnabled(true);
}
else
{
ui->statusLabel->setText(tr("Transaction is NOT completely signed"));
ui->sendTransactionButton->setEnabled(false);
}
}
void MultisigDialog::on_transaction_textChanged()
{
while(ui->inputs->count())
delete ui->inputs->takeAt(0)->widget();
while(ui->outputs->count())
delete ui->outputs->takeAt(0)->widget();
if(ui->transaction->text().size() > 0)
ui->signTransactionButton->setEnabled(true);
else
ui->signTransactionButton->setEnabled(false);
// Decode the raw transaction
std::vector<unsigned char> txData(ParseHex(ui->transaction->text().toStdString()));
CDataStream ss(txData, SER_NETWORK, PROTOCOL_VERSION);
CTransaction tx;
try
{
ss >> tx;
}
catch(std::exception &e)
{
(void)e;
return;
}
// Fill input list
int index = -1;
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
uint256 prevoutHash = txin.prevout.hash;
addInput();
index++;
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(index)->widget());
if(entry)
{
entry->setTransactionId(QString(prevoutHash.GetHex().c_str()));
entry->setTransactionOutputIndex(txin.prevout.n);
}
}
// Fill output list
index = -1;
BOOST_FOREACH(const CTxOut& txout, tx.vout)
{
CScript scriptPubKey = txout.scriptPubKey;
CTxDestination addr;
ExtractDestination(scriptPubKey, addr);
CBitcoinAddress address(addr);
SendCoinsRecipient recipient;
recipient.address = QString(address.ToString().c_str());
recipient.amount = txout.nValue;
addOutput();
index++;
SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(ui->outputs->itemAt(index)->widget());
if(entry)
{
entry->setValue(recipient);
}
}
updateRemoveEnabled();
}
void MultisigDialog::on_transaction_textChanged()
{
ui->fee->setStyleSheet("");
ui->statusLabel->setText("");
while(ui->inputs->count())
delete ui->inputs->takeAt(0)->widget();
while(ui->outputs->count())
delete ui->outputs->takeAt(0)->widget();
if(ui->transaction->text().size() > 0)
ui->signTransactionButton->setEnabled(true);
else
ui->signTransactionButton->setEnabled(false);
// Decode the raw transaction
std::vector<unsigned char> txData(ParseHex(ui->transaction->text().toStdString()));
CDataStream ss(txData, SER_NETWORK, PROTOCOL_VERSION);
CTransaction tx;
try
{
ss >> tx;
}
catch(std::exception &e)
{
return;
}
// Fill input list
int index = -1;
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
uint256 prevoutHash = txin.prevout.hash;
addInput();
index++;
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(index)->widget());
if(entry)
{
entry->setTransactionId(QString(prevoutHash.GetHex().c_str()));
entry->setTransactionOutputIndex(txin.prevout.n);
}
}
// Fill output list
index = -1;
BOOST_FOREACH(const CTxOut& txout, tx.vout)
{
CScript scriptPubKey = txout.scriptPubKey;
CTxDestination addr;
ExtractDestination(scriptPubKey, addr);
CBitcoinAddress address(addr);
SendCoinsRecipient recipient;
recipient.address = QString(address.ToString().c_str());
recipient.amount = txout.nValue;
addOutput();
index++;
SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(ui->outputs->itemAt(index)->widget());
if(entry)
{
entry->setValue(recipient);
}
}
updateRemoveEnabled();
// Check the fee
int64_t transactionSize = ui->transaction->text().size() / 2;
if(transactionSize == 0)
return;
transactionSize += ui->inputs->count() * 73; // Future ECDSA signatures in DER format
int64_t fee = (int64_t ) (ui->fee->text().toDouble() * COIN);
int64_t minFee = MIN_TX_FEE * (1 + (int64_t) transactionSize / 1000);
if(fee < minFee)
{
ui->fee->setStyleSheet("color:red;");
ui->statusLabel->setText(tr("The transaction fee might be too small."));
}
else if(fee > minFee)
{
ui->fee->setStyleSheet("color:red;");
ui->statusLabel->setText(tr("The transaction fee might be too big. Don't forget to add an output for the change address."));
}
}
void MultisigDialog::on_signTransactionButton_clicked()
{
ui->signedTransaction->clear();
if(!model)
return;
CWallet *wallet = model->getWallet();
// Decode the raw transaction
std::vector<unsigned char> txData(ParseHex(ui->transaction->text().toStdString()));
CDataStream ss(txData, SER_NETWORK, PROTOCOL_VERSION);
CTransaction tx;
try
{
ss >> tx;
}
catch(std::exception &e)
{
return;
}
CTransaction mergedTx(tx);
// Fetch previous transactions (inputs)
// duplicated in rpcrawtransaction.cpp:389
CCoinsView viewDummy;
CCoinsViewCache view(viewDummy);
{
LOCK(mempool.cs);
CCoinsViewCache &viewChain = *pcoinsTip;
CCoinsViewMemPool viewMempool(viewChain, mempool);
view.SetBackend(viewMempool); // temporarily switch cache backend to db+mempool view
BOOST_FOREACH(const CTxIn& txin, mergedTx.vin) {
const uint256& prevHash = txin.prevout.hash;
CCoins coins;
view.GetCoins(prevHash, coins); // this is certainly allowed to fail
}
view.SetBackend(viewDummy); // switch back to avoid locking mempool for too long
}
// Add the redeem scripts to the wallet keystore
for(int i = 0; i < ui->inputs->count(); i++)
{
MultisigInputEntry *entry = qobject_cast<MultisigInputEntry *>(ui->inputs->itemAt(i)->widget());
if(entry)
{
QString redeemScriptStr = entry->getRedeemScript();
if(redeemScriptStr.size() > 0)
{
std::vector<unsigned char> scriptData(ParseHex(redeemScriptStr.toStdString()));
CScript redeemScript(scriptData.begin(), scriptData.end());
wallet->AddCScript(redeemScript);
}
}
}
WalletModel::UnlockContext ctx(model->requestUnlock());
if(!ctx.isValid())
return;
// Sign what we can:
// mostly like rpcrawtransaction:503
bool fComplete = true;
// Sign what we can:
for (unsigned int i = 0; i < mergedTx.vin.size(); i++)
{
CTxIn& txin = mergedTx.vin[i];
CCoins coins;
if (!view.GetCoins(txin.prevout.hash, coins) || !coins.IsAvailable(txin.prevout.n))
{
fComplete = false;
continue;
}
const CScript& prevPubKey = coins.vout[txin.prevout.n].scriptPubKey;
txin.scriptSig.clear();
SignSignature(*wallet, prevPubKey, mergedTx, i, SIGHASH_ALL);
txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, tx.vin[i].scriptSig);
if (!VerifyScript(txin.scriptSig, prevPubKey, mergedTx, i, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC, 0))
fComplete = false;
}
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << mergedTx;
ui->signedTransaction->setText(HexStr(ssTx.begin(), ssTx.end()).c_str());
if(fComplete)
{
ui->statusLabel->setText(tr("Transaction signature is complete"));
ui->sendTransactionButton->setEnabled(true);
}
else
{
ui->statusLabel->setText(tr("Transaction is NOT completely signed"));
ui->sendTransactionButton->setEnabled(false);
}
}