text: // Copyright (c) 2011-2014 The Bitcoin developers
  // Copyright (c) 2014-2015 The Dash developers
  // Copyright (c) 2015-2020 The PIVX developers
  // Copyright (c) 2021 The T-Notes developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "paymentserver.h"
  
  #include "bitcoinunits.h"
  #include "guiutil.h"
  #include "optionsmodel.h"
  #include "policy/policy.h"
  
  #include "base58.h"
  #include "chainparams.h"
  #include "guiinterface.h"
  #include "util.h"
  #include "wallet/wallet.h"
  
  #include <cstdlib>
  
  #include <QApplication>
  #include <QByteArray>
  #include <QDataStream>
  #include <QDateTime>
  #include <QDebug>
  #include <QFile>
  #include <QFileOpenEvent>
  #include <QHash>
  #include <QList>
  #include <QLocalServer>
  #include <QLocalSocket>
  #include <QNetworkAccessManager>
  #include <QNetworkProxy>
  #include <QNetworkReply>
  #include <QNetworkRequest>
  #include <QSslCertificate>
  #include <QSslConfiguration>
  #include <QSslError>
  #include <QStringList>
  #include <QTextDocument>
  #include <QUrlQuery>
  
  
  const int BITCOIN_IPC_CONNECT_TIMEOUT = 1000; // milliseconds
  const QString BITCOIN_IPC_PREFIX("t-notes:");
  // BIP70 payment protocol messages
  const char* BIP70_MESSAGE_PAYMENTACK = "PaymentACK";
  const char* BIP70_MESSAGE_PAYMENTREQUEST = "PaymentRequest";
  // BIP71 payment protocol media types
  const char* BIP71_MIMETYPE_PAYMENT = "application/t_notes-payment";
  const char* BIP71_MIMETYPE_PAYMENTACK = "application/t_notes-paymentack";
  const char* BIP71_MIMETYPE_PAYMENTREQUEST = "application/t_notes-paymentrequest";
  // BIP70 max payment request size in bytes (DoS protection)
  const qint64 BIP70_MAX_PAYMENTREQUEST_SIZE = 50000;
  
  struct X509StoreDeleter {
      void operator()(X509_STORE* b)
      {
          X509_STORE_free(b);
      }
  };
  
  struct X509Deleter {
      void operator()(X509* b) { X509_free(b); }
  };
  
  namespace // Anon namespace
  {
  std::unique_ptr<X509_STORE, X509StoreDeleter> certStore;
  }
  
  //
  // Create a name that is unique for:
  //  testnet / non-testnet
  //  data directory
  //
  static QString ipcServerName()
  {
      QString name("T-NotesQt");
  
      // Append a simple hash of the datadir
      // Note that GetDataDir(true) returns a different path
      // for -testnet versus main net
      QString ddir(QString::fromStdString(GetDataDir(true).string()));
      name.append(QString::number(qHash(ddir)));
  
      return name;
  }
  
  //
  // We store payment URIs and requests received before
  // the main GUI window is up and ready to ask the user
  // to send payment.
  
  static QList<QString> savedPaymentRequests;
  
  static void ReportInvalidCertificate(const QSslCertificate& cert)
  {
      qDebug() << QString("%1: Payment server found an invalid certificate: ").arg(__func__) << cert.serialNumber() << cert.subjectInfo(QSslCertificate::CommonName) << cert.subjectInfo(QSslCertificate::DistinguishedNameQualifier) << cert.subjectInfo(QSslCertificate::OrganizationalUnitName);
  }
  
  //
  // Load OpenSSL's list of root certificate authorities
  //
  void PaymentServer::LoadRootCAs(X509_STORE* _store)
  {
      // Unit tests mostly use this, to pass in fake root CAs:
      if (_store) {
          certStore.reset(_store);
          return;
      }
  
      // Normal execution, use either -rootcertificates or system certs:
      certStore.reset(X509_STORE_new());
  
      // Note: use "-system-" default here so that users can pass -rootcertificates=""
      // and get 'I don't like X.509 certificates, don't trust anybody' behavior:
      QString certFile = QString::fromStdString(gArgs.GetArg("-rootcertificates", "-system-"));
  
      if (certFile.isEmpty())
          return; // Empty store
  
      QList<QSslCertificate> certList;
  
      if (certFile != "-system-") {
          certList = QSslCertificate::fromPath(certFile);
          // Use those certificates when fetching payment requests, too:
          QSslConfiguration::defaultConfiguration().setCaCertificates(certList);
      } else
          certList = QSslConfiguration::systemCaCertificates();
  
      int nRootCerts = 0;
      const QDateTime currentTime = QDateTime::currentDateTime();
      for (const QSslCertificate& cert : certList) {
          if (currentTime < cert.effectiveDate() || currentTime > cert.expiryDate()) {
              ReportInvalidCertificate(cert);
              continue;
          }
  
          // Blacklisted certificate
          if (cert.isBlacklisted()) {
              ReportInvalidCertificate(cert);
              continue;
          }
          QByteArray certData = cert.toDer();
          const unsigned char* data = (const unsigned char*)certData.data();
  
          std::unique_ptr<X509, X509Deleter> x509(d2i_X509(0, &data, certData.size()));
          if (x509 && X509_STORE_add_cert(certStore.get(), x509.get())) {
              // Note: X509_STORE increases the reference count to the X509 object,
              // we still have to release our reference to it.
              ++nRootCerts;
          } else {
              ReportInvalidCertificate(cert);
              continue;
          }
      }
      qWarning() << "PaymentServer::LoadRootCAs : Loaded " << nRootCerts << " root certificates";
  
      // Project for another day:
      // Fetch certificate revocation lists, and add them to certStore.
      // Issues to consider:
      //   performance (start a thread to fetch in background?)
      //   privacy (fetch through tor/proxy so IP address isn't revealed)
      //   would it be easier to just use a compiled-in blacklist?
      //    or use Qt's blacklist?
      //   "certificate stapling" with server-side caching is more efficient
  }
  
  //
  // Sending to the server is done synchronously, at startup.
  // If the server isn't already running, startup continues,
  // and the items in savedPaymentRequest will be handled
  // when uiReady() is called.
  //
  // Warning: ipcSendCommandLine() is called early in init,
  // so don't use "emit message()", but "QMessageBox::"!
  //
  void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
  {
      for (int i = 1; i < argc; i++) {
          QString arg(argv[i]);
          if (arg.startsWith("-"))
              continue;
  
          // If the t_notes: URI contains a payment request, we are not able to detect the
          // network as that would require fetching and parsing the payment request.
          // That means clicking such an URI which contains a testnet payment request
          // will start a mainnet instance and throw a "wrong network" error.
          if (arg.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // t_notes: URI
          {
              savedPaymentRequests.append(arg);
  
              SendCoinsRecipient r;
              if (GUIUtil::parseBitcoinURI(arg, &r) && !r.address.isEmpty()) {
                  if (IsValidDestinationString(r.address.toStdString(), false, *CreateChainParams(CBaseChainParams::MAIN))) {
                      SelectParams(CBaseChainParams::MAIN);
                  } else if (IsValidDestinationString(r.address.toStdString(), false, *CreateChainParams(CBaseChainParams::TESTNET))) {
                      SelectParams(CBaseChainParams::TESTNET);
                  }
              }
          } else if (QFile::exists(arg)) // Filename
          {
              savedPaymentRequests.append(arg);
  
              PaymentRequestPlus request;
              if (readPaymentRequestFromFile(arg, request)) {
                  if (request.getDetails().network() == "main") {
                      SelectParams(CBaseChainParams::MAIN);
                  } else if (request.getDetails().network() == "test") {
                      SelectParams(CBaseChainParams::TESTNET);
                  }
              }
          } else {
              // Printing to debug.log is about the best we can do here, the
              // GUI hasn't started yet so we can't pop up a message box.
              qWarning() << "PaymentServer::ipcSendCommandLine : Payment request file does not exist: " << arg;
          }
      }
  }
  
  //
  // Sending to the server is done synchronously, at startup.
  // If the server isn't already running, startup continues,
  // and the items in savedPaymentRequest will be handled
  // when uiReady() is called.
  //
  bool PaymentServer::ipcSendCommandLine()
  {
      bool fResult = false;
      for (const QString& r : savedPaymentRequests) {
          QLocalSocket* socket = new QLocalSocket();
          socket->connectToServer(ipcServerName(), QIODevice::WriteOnly);
          if (!socket->waitForConnected(BITCOIN_IPC_CONNECT_TIMEOUT)) {
              delete socket;
              socket = NULL;
              return false;
          }
  
          QByteArray block;
          QDataStream out(&block, QIODevice::WriteOnly);
          out.setVersion(QDataStream::Qt_4_0);
          out << r;
          out.device()->seek(0);
  
          socket->write(block);
          socket->flush();
          socket->waitForBytesWritten(BITCOIN_IPC_CONNECT_TIMEOUT);
          socket->disconnectFromServer();
  
          delete socket;
          socket = NULL;
          fResult = true;
      }
  
      return fResult;
  }
  
  PaymentServer::PaymentServer(QObject* parent, bool startLocalServer) : QObject(parent),
                                                                         saveURIs(true),
                                                                         uriServer(0),
                                                                         netManager(0),
                                                                         optionsModel(0)
  {
      // Verify that the version of the library that we linked against is
      // compatible with the version of the headers we compiled against.
      GOOGLE_PROTOBUF_VERIFY_VERSION;
  
      // Install global event filter to catch QFileOpenEvents
      // on Mac: sent when you click t_notes: links
      // other OSes: helpful when dealing with payment request files (in the future)
      if (parent)
          parent->installEventFilter(this);
  
      QString name = ipcServerName();
  
      // Clean up old socket leftover from a crash:
      QLocalServer::removeServer(name);
  
      if (startLocalServer) {
          uriServer = new QLocalServer(this);
  
          if (!uriServer->listen(name)) {
              // constructor is called early in init, so don't use "emit message()" here
              QMessageBox::critical(0, tr("Payment request error"),
                  tr("Cannot start t-notes: click-to-pay handler"));
          } else {
              connect(uriServer, &QLocalServer::newConnection, this, &PaymentServer::handleURIConnection);
              connect(this, &PaymentServer::receivedPaymentACK, this, &PaymentServer::handlePaymentACK);
          }
      }
  }
  
  PaymentServer::~PaymentServer()
  {
      google::protobuf::ShutdownProtobufLibrary();
  }
  
  //
  // OSX-specific way of handling t_notes: URIs and
  // PaymentRequest mime types
  //
  bool PaymentServer::eventFilter(QObject* object, QEvent* event)
  {
      // clicking on t_notes: URIs creates FileOpen events on the Mac
      if (event->type() == QEvent::FileOpen) {
          QFileOpenEvent* fileEvent = static_cast<QFileOpenEvent*>(event);
          if (!fileEvent->file().isEmpty())
              handleURIOrFile(fileEvent->file());
          else if (!fileEvent->url().isEmpty())
              handleURIOrFile(fileEvent->url().toString());
  
          return true;
      }
  
      return QObject::eventFilter(object, event);
  }
  
  void PaymentServer::initNetManager()
  {
      if (!optionsModel)
          return;
      if (netManager != NULL)
          delete netManager;
  
      // netManager is used to fetch paymentrequests given in t_notes: URIs
      netManager = new QNetworkAccessManager(this);
  
      QNetworkProxy proxy;
  
      // Query active SOCKS5 proxy
      if (optionsModel->getProxySettings(proxy)) {
          netManager->setProxy(proxy);
  
          qDebug() << "PaymentServer::initNetManager : Using SOCKS5 proxy" << proxy.hostName() << ":" << proxy.port();
      } else
          qDebug() << "PaymentServer::initNetManager : No active proxy server found.";
  
      connect(netManager, &QNetworkAccessManager::finished, this, &PaymentServer::netRequestFinished);
      connect(netManager, &QNetworkAccessManager::sslErrors, this, &PaymentServer::reportSslErrors);
  }
  
  void PaymentServer::uiReady()
  {
      initNetManager();
  
      saveURIs = false;
      for (const QString& s : savedPaymentRequests) {
          handleURIOrFile(s);
      }
      savedPaymentRequests.clear();
  }
  
  void PaymentServer::handleURIOrFile(const QString& s)
  {
      if (saveURIs) {
          savedPaymentRequests.append(s);
          return;
      }
  
      if (s.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // t_notes: URI
      {
          QUrlQuery uri((QUrl(s)));
          if (uri.hasQueryItem("r")) // payment request URI
          {
              QByteArray temp;
              temp.append(uri.queryItemValue("r"));
              QString decoded = QUrl::fromPercentEncoding(temp);
              QUrl fetchUrl(decoded, QUrl::StrictMode);
  
              if (fetchUrl.isValid()) {
                  qDebug() << "PaymentServer::handleURIOrFile : fetchRequest(" << fetchUrl << ")";
                  fetchRequest(fetchUrl);
              } else {
                  qWarning() << "PaymentServer::handleURIOrFile : Invalid URL: " << fetchUrl;
                  Q_EMIT message(tr("URI handling"),
                      tr("Payment request fetch URL is invalid: %1").arg(fetchUrl.toString()),
                      CClientUIInterface::ICON_WARNING);
              }
  
              return;
          } else // normal URI
          {
              SendCoinsRecipient recipient;
              if (GUIUtil::parseBitcoinURI(s, &recipient)) {
                  if (!IsValidDestinationString(recipient.address.toStdString(), false, Params())) {
                      Q_EMIT message(tr("URI handling"), tr("Invalid payment address %1").arg(recipient.address),
                          CClientUIInterface::MSG_ERROR);
                  } else
                      Q_EMIT receivedPaymentRequest(recipient);
              } else
                  Q_EMIT message(tr("URI handling"),
                      tr("URI cannot be parsed! This can be caused by an invalid T-Notes address or malformed URI parameters."),
                      CClientUIInterface::ICON_WARNING);
  
              return;
          }
      }
  
      if (QFile::exists(s)) // payment request file
      {
          PaymentRequestPlus request;
          SendCoinsRecipient recipient;
          if (!readPaymentRequestFromFile(s, request)) {
              Q_EMIT message(tr("Payment request file handling"),
                  tr("Payment request file cannot be read! This can be caused by an invalid payment request file."),
                  CClientUIInterface::ICON_WARNING);
          } else if (processPaymentRequest(request, recipient))
              Q_EMIT receivedPaymentRequest(recipient);
  
          return;
      }
  }
  
  void PaymentServer::handleURIConnection()
  {
      QLocalSocket* clientConnection = uriServer->nextPendingConnection();
  
      while (clientConnection->bytesAvailable() < (int)sizeof(quint32))
          clientConnection->waitForReadyRead();
  
      connect(clientConnection, &QLocalSocket::disconnected, clientConnection, &QLocalSocket::deleteLater);
  
      QDataStream in(clientConnection);
      in.setVersion(QDataStream::Qt_4_0);
      if (clientConnection->bytesAvailable() < (int)sizeof(quint16)) {
          return;
      }
      QString msg;
      in >> msg;
  
      handleURIOrFile(msg);
  }
  
  //
  // Warning: readPaymentRequestFromFile() is used in ipcSendCommandLine()
  // so don't use "emit message()", but "QMessageBox::"!
  //
  bool PaymentServer::readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request)
  {
      QFile f(filename);
      if (!f.open(QIODevice::ReadOnly)) {
          qWarning() << QString("PaymentServer::%1: Failed to open %2").arg(__func__).arg(filename);
          return false;
      }
  
      // BIP70 DoS protection
      if (f.size() > BIP70_MAX_PAYMENTREQUEST_SIZE) {
          qWarning() << QString("PaymentServer::%1: Payment request %2 is too large (%3 bytes, allowed %4 bytes).")
                            .arg(__func__)
                            .arg(filename)
                            .arg(f.size())
                            .arg(BIP70_MAX_PAYMENTREQUEST_SIZE);
          return false;
      }
  
      QByteArray data = f.readAll();
  
      return request.parse(data);
  }
  
  bool PaymentServer::processPaymentRequest(PaymentRequestPlus& request, SendCoinsRecipient& recipient)
  {
      if (!optionsModel)
          return false;
  
      if (request.IsInitialized()) {
          const payments::PaymentDetails& details = request.getDetails();
  
          // Payment request network matches client network?
          if (details.network() != Params().NetworkIDString()) {
              Q_EMIT message(tr("Payment request rejected"), tr("Payment request network doesn't match client network."),
                  CClientUIInterface::MSG_ERROR);
  
              return false;
          }
  
          // Expired payment request?
          if (details.has_expires() && (int64_t)details.expires() < GetTime()) {
              Q_EMIT message(tr("Payment request rejected"), tr("Payment request has expired."),
                  CClientUIInterface::MSG_ERROR);
  
              return false;
          }
      } else {
          Q_EMIT message(tr("Payment request error"), tr("Payment request is not initialized."),
              CClientUIInterface::MSG_ERROR);
  
          return false;
      }
  
      recipient.paymentRequest = request;
      recipient.message = GUIUtil::HtmlEscape(request.getDetails().memo());
  
      request.getMerchant(certStore.get(), recipient.authenticatedMerchant);
  
      QList<std::pair<CScript, CAmount> > sendingTos = request.getPayTo();
      QStringList addresses;
  
      for (const std::pair<CScript, CAmount>& sendingTo : sendingTos) {
          // Extract and check destination addresses
          CTxDestination dest;
          if (ExtractDestination(sendingTo.first, dest)) {
              // Append destination address
              addresses.append(QString::fromStdString(EncodeDestination(dest)));
          } else if (!recipient.authenticatedMerchant.isEmpty()) {
              // Insecure payments to custom t_notes addresses are not supported
              // (there is no good way to tell the user where they are paying in a way
              // they'd have a chance of understanding).
              Q_EMIT message(tr("Payment request rejected"),
                  tr("Unverified payment requests to custom payment scripts are unsupported."),
                  CClientUIInterface::MSG_ERROR);
              return false;
          }
  
          // Extract and check amounts
          CTxOut txOut(sendingTo.second, sendingTo.first);
          if (IsDust(txOut, ::minRelayTxFee)) {
              Q_EMIT message(tr("Payment request error"), tr("Requested payment amount of %1 is too small (considered dust).").arg(BitcoinUnits::formatWithUnit(optionsModel->getDisplayUnit(), sendingTo.second)),
                  CClientUIInterface::MSG_ERROR);
  
              return false;
          }
  
          recipient.amount += sendingTo.second;
      }
      // Store addresses and format them to fit nicely into the GUI
      recipient.address = addresses.join("<br />");
  
      if (!recipient.authenticatedMerchant.isEmpty()) {
          qDebug() << "PaymentServer::processPaymentRequest : Secure payment request from " << recipient.authenticatedMerchant;
      } else {
          qDebug() << "PaymentServer::processPaymentRequest : Insecure payment request to " << addresses.join(", ");
      }
  
      return true;
  }
  
  void PaymentServer::fetchRequest(const QUrl& url)
  {
      QNetworkRequest netRequest;
      netRequest.setAttribute(QNetworkRequest::User, BIP70_MESSAGE_PAYMENTREQUEST);
      netRequest.setUrl(url);
      netRequest.setRawHeader("User-Agent", CLIENT_NAME.c_str());
      netRequest.setRawHeader("Accept", BIP71_MIMETYPE_PAYMENTREQUEST);
      netManager->get(netRequest);
  }
  
  void PaymentServer::fetchPaymentACK(CWallet* wallet, const SendCoinsRecipient& recipient, const QByteArray& transaction)
  {
      const payments::PaymentDetails& details = recipient.paymentRequest.getDetails();
      if (!details.has_payment_url())
          return;
  
      QNetworkRequest netRequest;
      netRequest.setAttribute(QNetworkRequest::User, BIP70_MESSAGE_PAYMENTACK);
      netRequest.setUrl(QString::fromStdString(details.payment_url()));
      netRequest.setHeader(QNetworkRequest::ContentTypeHeader, BIP71_MIMETYPE_PAYMENT);
      netRequest.setRawHeader("User-Agent", CLIENT_NAME.c_str());
      netRequest.setRawHeader("Accept", BIP71_MIMETYPE_PAYMENTACK);
  
      payments::Payment payment;
      payment.set_merchant_data(details.merchant_data());
      payment.add_transactions(transaction.data(), transaction.size());
  
      // Create a new refund address, or re-use:
      CPubKey newKey;
      if (wallet->GetKeyFromPool(newKey)) {
          CKeyID keyID = newKey.GetID();
          std::string label = tr("Refund from %1").arg(recipient.authenticatedMerchant).toStdString();
          wallet->SetAddressBook(keyID, label, "refund");
          CScript s = GetScriptForDestination(keyID);
          payments::Output* refund_to = payment.add_refund_to();
          refund_to->set_script(&s[0], s.size());
      } else {
          // This should never happen, because sending coins should have
          // just unlocked the wallet and refilled the keypool.
          qWarning() << "PaymentServer::fetchPaymentACK : Error getting refund key, refund_to not set";
      }
  
      int length = payment.ByteSize();
      netRequest.setHeader(QNetworkRequest::ContentLengthHeader, length);
      QByteArray serData(length, '\0');
      if (payment.SerializeToArray(serData.data(), length)) {
          netManager->post(netRequest, serData);
      } else {
          // This should never happen, either.
          qWarning() << "PaymentServer::fetchPaymentACK : Error serializing payment message";
      }
  }
  
  void PaymentServer::netRequestFinished(QNetworkReply* reply)
  {
      reply->deleteLater();
  
      // BIP70 DoS protection
      if (reply->size() > BIP70_MAX_PAYMENTREQUEST_SIZE) {
          QString msg = tr("Payment request %1 is too large (%2 bytes, allowed %3 bytes).")
                            .arg(reply->request().url().toString())
                            .arg(reply->size())
                            .arg(BIP70_MAX_PAYMENTREQUEST_SIZE);
  
          qWarning() << QString("PaymentServer::%1:").arg(__func__) << msg;
          Q_EMIT message(tr("Payment request DoS protection"), msg, CClientUIInterface::MSG_ERROR);
          return;
      }
  
      if (reply->error() != QNetworkReply::NoError) {
          QString msg = tr("Error communicating with %1: %2")
                            .arg(reply->request().url().toString())
                            .arg(reply->errorString());
  
          qWarning() << "PaymentServer::netRequestFinished: " << msg;
          Q_EMIT message(tr("Payment request error"), msg, CClientUIInterface::MSG_ERROR);
          return;
      }
  
      QByteArray data = reply->readAll();
  
      QString requestType = reply->request().attribute(QNetworkRequest::User).toString();
      if (requestType == BIP70_MESSAGE_PAYMENTREQUEST) {
          PaymentRequestPlus request;
          SendCoinsRecipient recipient;
          if (!request.parse(data)) {
              qWarning() << "PaymentServer::netRequestFinished : Error parsing payment request";
              Q_EMIT message(tr("Payment request error"),
                  tr("Payment request cannot be parsed!"),
                  CClientUIInterface::MSG_ERROR);
          } else if (processPaymentRequest(request, recipient))
              Q_EMIT receivedPaymentRequest(recipient);
  
          return;
      } else if (requestType == BIP70_MESSAGE_PAYMENTACK) {
          payments::PaymentACK paymentACK;
          if (!paymentACK.ParseFromArray(data.data(), data.size())) {
              QString msg = tr("Bad response from server %1")
                                .arg(reply->request().url().toString());
  
              qWarning() << "PaymentServer::netRequestFinished : " << msg;
              Q_EMIT message(tr("Payment request error"), msg, CClientUIInterface::MSG_ERROR);
          } else {
              Q_EMIT receivedPaymentACK(GUIUtil::HtmlEscape(paymentACK.memo()));
          }
      }
  }
  
  void PaymentServer::reportSslErrors(QNetworkReply* reply, const QList<QSslError>& errs)
  {
      Q_UNUSED(reply);
  
      QString errString;
      for (const QSslError& err : errs) {
          qWarning() << "PaymentServer::reportSslErrors : " << err;
          errString += err.errorString() + "\n";
      }
      Q_EMIT message(tr("Network request error"), errString, CClientUIInterface::MSG_ERROR);
  }
  
  void PaymentServer::setOptionsModel(OptionsModel* optionsModel)
  {
      this->optionsModel = optionsModel;
  }
  
  void PaymentServer::handlePaymentACK(const QString& paymentACKMsg)
  {
      // currently we don't futher process or store the paymentACK message
      Q_EMIT message(tr("Payment acknowledged"), paymentACKMsg, CClientUIInterface::ICON_INFORMATION | CClientUIInterface::MODAL);
  }
  
  X509_STORE* PaymentServer::getCertStore()
  {
      return certStore.get();
  }
  