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// Copyright (c) 2011-2020 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 <qt/psbtoperationsdialog.h>
#include <core_io.h>
#include <interfaces/node.h>
#include <key_io.h>
#include <node/psbt.h>
#include <policy/policy.h>
#include <qt/bitcoinunits.h>
#include <qt/forms/ui_psbtoperationsdialog.h>
#include <qt/guiutil.h>
#include <qt/optionsmodel.h>
#include <util/strencodings.h>
#include <iostream>
PSBTOperationsDialog::PSBTOperationsDialog(
QWidget* parent, WalletModel* wallet_model, ClientModel* client_model) : QDialog(parent),
m_ui(new Ui::PSBTOperationsDialog),
m_wallet_model(wallet_model),
m_client_model(client_model)
{
m_ui->setupUi(this);
setWindowTitle("PSBT Operations");
connect(m_ui->signTransactionButton, &QPushButton::clicked, this, &PSBTOperationsDialog::signTransaction);
connect(m_ui->broadcastTransactionButton, &QPushButton::clicked, this, &PSBTOperationsDialog::broadcastTransaction);
connect(m_ui->copyToClipboardButton, &QPushButton::clicked, this, &PSBTOperationsDialog::copyToClipboard);
connect(m_ui->saveButton, &QPushButton::clicked, this, &PSBTOperationsDialog::saveTransaction);
connect(m_ui->closeButton, &QPushButton::clicked, this, &PSBTOperationsDialog::close);
m_ui->signTransactionButton->setEnabled(false);
m_ui->broadcastTransactionButton->setEnabled(false);
}
PSBTOperationsDialog::~PSBTOperationsDialog()
{
delete m_ui;
}
void PSBTOperationsDialog::openWithPSBT(PartiallySignedTransaction psbtx)
{
m_transaction_data = psbtx;
bool complete;
size_t n_could_sign;
FinalizePSBT(psbtx); // Make sure all existing signatures are fully combined before checking for completeness.
TransactionError err = m_wallet_model->wallet().fillPSBT(SIGHASH_ALL, false /* sign */, true /* bip32derivs */, m_transaction_data, complete, &n_could_sign);
if (err != TransactionError::OK) {
showStatus(tr("Failed to load transaction: %1")
.arg(QString::fromStdString(TransactionErrorString(err).translated)), StatusLevel::ERR);
return;
}
m_ui->broadcastTransactionButton->setEnabled(complete);
m_ui->signTransactionButton->setEnabled(!complete && !m_wallet_model->wallet().privateKeysDisabled() && n_could_sign > 0);
updateTransactionDisplay();
}
void PSBTOperationsDialog::signTransaction()
{
bool complete;
size_t n_signed;
TransactionError err = m_wallet_model->wallet().fillPSBT(SIGHASH_ALL, true /* sign */, true /* bip32derivs */, m_transaction_data, complete, &n_signed);
if (err != TransactionError::OK) {
showStatus(tr("Failed to sign transaction: %1")
.arg(QString::fromStdString(TransactionErrorString(err).translated)), StatusLevel::ERR);
return;
}
updateTransactionDisplay();
if (!complete && n_signed < 1) {
showStatus(tr("Could not sign any more inputs."), StatusLevel::WARN);
} else if (!complete) {
showStatus(tr("Signed %1 inputs, but more signatures are still required.").arg(n_signed),
StatusLevel::INFO);
} else {
showStatus(tr("Signed transaction successfully. Transaction is ready to broadcast."),
StatusLevel::INFO);
m_ui->broadcastTransactionButton->setEnabled(true);
}
}
void PSBTOperationsDialog::broadcastTransaction()
{
CMutableTransaction mtx;
if (!FinalizeAndExtractPSBT(m_transaction_data, mtx)) {
// This is never expected to fail unless we were given a malformed PSBT
// (e.g. with an invalid signature.)
showStatus(tr("Unknown error processing transaction."), StatusLevel::ERR);
return;
}
CTransactionRef tx = MakeTransactionRef(mtx);
std::string err_string;
TransactionError error = BroadcastTransaction(
*m_client_model->node().context(), tx, err_string, DEFAULT_MAX_RAW_TX_FEE_RATE.GetFeePerK(), /* relay */ true, /* await_callback */ false);
if (error == TransactionError::OK) {
showStatus(tr("Transaction broadcast successfully! Transaction ID: %1")
.arg(QString::fromStdString(tx->GetHash().GetHex())), StatusLevel::INFO);
} else {
showStatus(tr("Transaction broadcast failed: %1")
.arg(QString::fromStdString(TransactionErrorString(error).translated)), StatusLevel::ERR);
}
}
void PSBTOperationsDialog::copyToClipboard() {
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << m_transaction_data;
GUIUtil::setClipboard(EncodeBase64(ssTx.str()).c_str());
showStatus(tr("PSBT copied to clipboard."), StatusLevel::INFO);
}
void PSBTOperationsDialog::saveTransaction() {
CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
ssTx << m_transaction_data;
QString selected_filter;
QString filename_suggestion = "";
bool first = true;
for (const CTxOut& out : m_transaction_data.tx->vout) {
if (!first) {
filename_suggestion.append("-");
}
CTxDestination address;
ExtractDestination(out.scriptPubKey, address);
QString amount = BitcoinUnits::format(m_wallet_model->getOptionsModel()->getDisplayUnit(), out.nValue);
QString address_str = QString::fromStdString(EncodeDestination(address));
filename_suggestion.append(address_str + "-" + amount);
first = false;
}
filename_suggestion.append(".psbt");
QString filename = GUIUtil::getSaveFileName(this,
tr("Save Transaction Data"), filename_suggestion,
tr("Partially Signed Transaction (Binary) (*.psbt)"), &selected_filter);
if (filename.isEmpty()) {
return;
}
std::ofstream out(filename.toLocal8Bit().data());
out << ssTx.str();
out.close();
showStatus(tr("PSBT saved to disk."), StatusLevel::INFO);
}
void PSBTOperationsDialog::updateTransactionDisplay() {
m_ui->transactionDescription->setText(QString::fromStdString(renderTransaction(m_transaction_data)));
showTransactionStatus(m_transaction_data);
}
std::string PSBTOperationsDialog::renderTransaction(const PartiallySignedTransaction &psbtx)
{
QString tx_description = "";
CAmount totalAmount = 0;
for (const CTxOut& out : psbtx.tx->vout) {
CTxDestination address;
ExtractDestination(out.scriptPubKey, address);
totalAmount += out.nValue;
tx_description.append(tr(" * Sends %1 to %2")
.arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, out.nValue))
.arg(QString::fromStdString(EncodeDestination(address))));
tx_description.append("<br>");
}
PSBTAnalysis analysis = AnalyzePSBT(psbtx);
tx_description.append(" * ");
if (!*analysis.fee) {
// This happens if the transaction is missing input UTXO information.
tx_description.append(tr("Unable to calculate transaction fee or total transaction amount."));
} else {
tx_description.append(tr("Pays transaction fee: "));
tx_description.append(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, *analysis.fee));
// add total amount in all subdivision units
tx_description.append("<hr />");
QStringList alternativeUnits;
for (const BitcoinUnits::Unit u : BitcoinUnits::availableUnits())
{
if(u != m_client_model->getOptionsModel()->getDisplayUnit()) {
alternativeUnits.append(BitcoinUnits::formatHtmlWithUnit(u, totalAmount));
}
}
tx_description.append(QString("<b>%1</b>: <b>%2</b>").arg(tr("Total Amount"))
.arg(BitcoinUnits::formatHtmlWithUnit(m_client_model->getOptionsModel()->getDisplayUnit(), totalAmount)));
tx_description.append(QString("<br /><span style='font-size:10pt; font-weight:normal;'>(=%1)</span>")
.arg(alternativeUnits.join(" " + tr("or") + " ")));
}
size_t num_unsigned = CountPSBTUnsignedInputs(psbtx);
if (num_unsigned > 0) {
tx_description.append("<br><br>");
tx_description.append(tr("Transaction has %1 unsigned inputs.").arg(QString::number(num_unsigned)));
}
return tx_description.toStdString();
}
void PSBTOperationsDialog::showStatus(const QString &msg, StatusLevel level) {
m_ui->statusBar->setText(msg);
switch (level) {
case StatusLevel::INFO: {
m_ui->statusBar->setStyleSheet("QLabel { background-color : lightgreen }");
break;
}
case StatusLevel::WARN: {
m_ui->statusBar->setStyleSheet("QLabel { background-color : orange }");
break;
}
case StatusLevel::ERR: {
m_ui->statusBar->setStyleSheet("QLabel { background-color : red }");
break;
}
}
m_ui->statusBar->show();
}
size_t PSBTOperationsDialog::couldSignInputs(const PartiallySignedTransaction &psbtx) {
size_t n_signed;
bool complete;
TransactionError err = m_wallet_model->wallet().fillPSBT(SIGHASH_ALL, false /* sign */, false /* bip32derivs */, m_transaction_data, complete, &n_signed);
if (err != TransactionError::OK) {
return 0;
}
return n_signed;
}
void PSBTOperationsDialog::showTransactionStatus(const PartiallySignedTransaction &psbtx) {
PSBTAnalysis analysis = AnalyzePSBT(psbtx);
size_t n_could_sign = couldSignInputs(psbtx);
switch (analysis.next) {
case PSBTRole::UPDATER: {
showStatus(tr("Transaction is missing some information about inputs."), StatusLevel::WARN);
break;
}
case PSBTRole::SIGNER: {
QString need_sig_text = tr("Transaction still needs signature(s).");
StatusLevel level = StatusLevel::INFO;
if (m_wallet_model->wallet().privateKeysDisabled()) {
need_sig_text += " " + tr("(But this wallet cannot sign transactions.)");
level = StatusLevel::WARN;
} else if (n_could_sign < 1) {
need_sig_text += " " + tr("(But this wallet does not have the right keys.)"); // XXX wording
level = StatusLevel::WARN;
}
showStatus(need_sig_text, level);
break;
}
case PSBTRole::FINALIZER:
case PSBTRole::EXTRACTOR: {
showStatus(tr("Transaction is fully signed and ready for broadcast."), StatusLevel::INFO);
break;
}
default: {
showStatus(tr("Transaction status is unknown."), StatusLevel::ERR);
break;
}
}
}
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