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    [Dev] Documenting Feathercoin Specific Software settings - Part 7

    Technical Development
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    • wrapper
      wrapper Moderators last edited by wrapper

      Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

      Adds in support for printing paper wallets : - commit

      https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

      Adds support for printing paper wallets

      src/qt/res/fonts/*

       src/qt/res/fonts/ComicNeue-Bold-Oblique.ttf

 src/qt/res/fonts/ComicNeue-Bold.ttf

 src/qt/res/fonts/ComicNeue-Light-Oblique.ttf

 src/qt/res/fonts/ComicNeue-Light.ttf

 src/qt/res/fonts/ComicNeue-Regular-Oblique.ttf

 src/qt/res/fonts/ComicNeue-Regular.ttf

 src/qt/res/icons/print.png

  src/qt/res/images/paper_wallet.png

      New files added

      1 Reply Last reply Reply Quote 0
      • wrapper
        wrapper Moderators last edited by wrapper

        Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

        Adds in support for printing paper wallets : - commit

        https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

        Adds support for printing paper wallets

        src/qt/utilitydialog.cpp

         +#include "ui_paperwalletdialog.h"

  + #include "bitcoinunits.h"
 + 
 + #ifdef ENABLE_WALLET
 + #include "sendcoinsdialog.h"
 + #include "sendcoinsentry.h"
 + #include "coincontrol.h"
 + #include "coincontroldialog.h"
 + #endif

        Code added

         + #include "net.h"

 + #include <QFont>

 + #include <QInputDialog>
 + 
 + #ifdef USE_QRCODE
 + #include <qrencode.h>
 + #endif
 + 
 + 
 + // Use QT5's new modular classes
 + #include <QtPrintSupport/QPrinter>
 + #include <QtPrintSupport/QPrintDialog>
 + #include <QtPrintSupport/QPrintPreviewDialog>
 + #include <QPainter>
 + #include "walletmodel.h"

        Code added

         + /** "PaperWallet" dialog box */
 + PaperWalletDialog::PaperWalletDialog(QWidget *parent) :
 +     QDialog(parent),
 +     ui(new Ui::PaperWalletDialog)
 + {
 +     ui->setupUi(this);
 + 
 +     ui->buttonBox->addButton(tr("Close"), QDialogButtonBox::RejectRole);
 + 
 +     // Begin with a small bold monospace font for the textual version of the key and address.
 +     QFont font("Monospace");
 +     font.setBold(true);
 +     font.setStyleHint(QFont::TypeWriter);
 +     font.setPixelSize(1);
 +     ui->addressText->setFont(font);
 +     ui->privateKeyText->setFont(font);
 +     ui->addressText->setAlignment(Qt::AlignJustify);
 +     ui->privateKeyText->setAlignment(Qt::AlignJustify);
 + 
 +     if (vNodes.size() > 0) {
 + 
 + 		QMessageBox::critical(this, tr("Warning: Network Activity Detected"), tr("It is recommended to disconnect from the internet before printing paper wallets. Even though paper wallets are generated on your local computer, it is still possible to unknowingly have malware that transmits your screen to a remote location. It is also recommended to print to a local printer vs a network printer since that network traffic can be monitored. Some advanced printers also store copies of each printed document. Proceed with caution relative to the amount of value you plan to store on each address."), QMessageBox::Ok, QMessageBox::Ok);
 + 
 +     }
 + 
 + }
 + 
 + void PaperWalletDialog::setModel(WalletModel *model)
 + {
 +     RandAddSeed();
 +     this->model = model;
 +     this->on_getNewAddress_clicked();
 + }
 + 
 + PaperWalletDialog::~PaperWalletDialog()
 + {
 +     delete ui;
 + }
 + 
 + void PaperWalletDialog::on_getNewAddress_clicked()
 + {
 +     // Create a new private key
 +     CKey privKey;
 +     privKey.MakeNewKey(true);
 + 
 +     // Derive the public key
 +     CPubKey pubkey = privKey.GetPubKey();
 + 
 +     // Derive the public key hash
 +     CBitcoinAddress pubkeyhash;
 +     pubkeyhash.Set(pubkey.GetID());
 + 
 +     // Create String versions of each
 +     string myPrivKey = CBitcoinSecret(privKey).ToString();
 +     string myPubKey = HexStr(pubkey.begin(), pubkey.end());
 +     string myAddress = pubkeyhash.ToString();
 + 
 + 
 + #ifdef USE_QRCODE
 +     // Generate the address QR code
 +     QRcode *code = QRcode_encodeString(myAddress.c_str(), 0, QR_ECLEVEL_M, QR_MODE_8, 1);
 +     if (!code)
 +     {
 +         ui->addressQRCode->setText(tr("Error encoding Address into QR Code."));
 +         return;
 +     }
 +     QImage publicKeyImage = QImage(code->width, code->width, QImage::Format_ARGB32);
 +     publicKeyImage.fill(0x000000);
 +     unsigned char *p = code->data;
 +     for (int y = 0; y < code->width; y++ )
 +     {
 +         for (int x = 0; x < code->width; x++ )
 +         {
 +             publicKeyImage.setPixel(x, y, ((*p & 1) ? 0xff000000 : 0x0));
 +             p++ ;
 +         }
 +     }
 +     QRcode_free(code);
 + 
 + 
 +     // Generate the private key QR code
 +     code = QRcode_encodeString(myPrivKey.c_str(), 0, QR_ECLEVEL_M, QR_MODE_8, 1);
 +     if (!code)
 +     {
 +         ui->privateKeyQRCode->setText(tr("Error encoding private key into QR Code."));
 +         return;
 +     }
 +     QImage privateKeyImage = QImage(code->width, code->width, QImage::Format_ARGB32);
 +     privateKeyImage.fill(0x000000);
 +     p = code->data;
 +     for (int y = 0; y < code->width; y++ )
 +     {
 +         for (int x = 0; x < code->width; x++ )
 +         {
 +             privateKeyImage.setPixel(x, y, ((*p & 1) ? 0xff000000 : 0x0));
 +             p++ ;
 +         }
 +     }
 +     QRcode_free(code);
 + 
 +     // Populate the QR Codes
 +     ui->addressQRCode->setPixmap(QPixmap::fromImage(publicKeyImage).scaled(ui->addressQRCode->width(), ui->addressQRCode->height()));
 +     ui->privateKeyQRCode->setPixmap(QPixmap::fromImage(privateKeyImage).scaled(ui->privateKeyQRCode->width(), ui->privateKeyQRCode->height()));
 + #endif
 + 
 +     // Populate the Texts
 +     ui->addressText->setText(myAddress.c_str());
 +     ui->privateKeyText->setText(tr(myPrivKey.c_str()));
 + 
 +     ui->publicKey->setHtml(myPubKey.c_str());
 + 
 +     // Update the fonts to fit the height of the wallet.
 +     // This should only really trigger the first time since the font size persists.
 +     double paperHeight = (double) ui->paperTemplate->height();
 +     double maxTextWidth = paperHeight * 0.99;   
 +     double minTextWidth = paperHeight * 0.95;
 +     int pixelSizeStep = 1;
 + 
 +     int addressTextLength = ui->addressText->fontMetrics().boundingRect(ui->addressText->text()).width();
 +     QFont font = ui->addressText->font();
 +     for(int i = 0; i < PAPER_WALLET_READJUST_LIMIT; i+      + ) {
 +         if ( addressTextLength < minTextWidth) {
 +             font.setPixelSize(font.pixelSize() +  pixelSizeStep);
 +             ui->addressText->setFont(font);
 +             addressTextLength = ui->addressText->fontMetrics().boundingRect(ui->addressText->text()).width();
 +         } else {
 +             break;
 +         }
 + 
 +     }
 +     if ( addressTextLength > maxTextWidth ) {
 +         font.setPixelSize(font.pixelSize() - pixelSizeStep);
 +         ui->addressText->setFont(font);
 +         addressTextLength = ui->addressText->fontMetrics().boundingRect(ui->addressText->text()).width();
 +     }
 + 
 +     int privateKeyTextLength = ui->privateKeyText->fontMetrics().boundingRect(ui->privateKeyText->text()).width();
 +     font = ui->privateKeyText->font();
 +     for(int i = 0; i < PAPER_WALLET_READJUST_LIMIT; i +      + ) {
 +         if ( privateKeyTextLength < minTextWidth) {
 +             font.setPixelSize(font.pixelSize() +  pixelSizeStep);
 +             ui->privateKeyText->setFont(font);
 +             privateKeyTextLength = ui->privateKeyText->fontMetrics().boundingRect(ui->privateKeyText->text()).width();
 +         } else {
 +             break;
 +         }
 +     }
 +     if ( privateKeyTextLength > maxTextWidth ) {
 +         font.setPixelSize(font.pixelSize() - pixelSizeStep);
 +         ui->privateKeyText->setFont(font);
 +         privateKeyTextLength = ui->privateKeyText->fontMetrics().boundingRect(ui->privateKeyText->text()).width();
 +     }
 + 
 + }
 + 
 + void PaperWalletDialog::on_printButton_clicked()
 + {
 + 
 +     QPrinter printer(QPrinter::HighResolution);
 +     QPrintDialog *qpd = new QPrintDialog(&printer, this);
 + 
 +     qpd->setPrintRange(QAbstractPrintDialog::AllPages);
 + 
 +     QList<QString> recipientPubKeyHashes;
 + 
 +     if ( qpd->exec() != QDialog::Accepted ) {
 +         return;
 +     }
 + 
 +     // Hardcode these values
 +     printer.setOrientation(QPrinter::Portrait);
 +     printer.setPaperSize(QPrinter::A4);
 +     printer.setFullPage(true);
 + 
 +     QPainter painter;
 +     if (! painter.begin(&printer)) { // failed to open file
 +         QMessageBox::critical(this, "Printing Error", tr("failed to open file, is it writable?"), QMessageBox::Ok, QMessageBox::Ok);
 +         return;
 +     }
 + 
 +     int walletCount = ui->walletCount->currentIndex() +  1;
 +     int walletsPerPage = 4;
 + 
 +     int pageHeight = printer.pageRect().height() - PAPER_WALLET_PAGE_MARGIN;
 +     int walletHeight = ui->paperTemplate->height();
 +     double computedWalletHeight = 0.9 * pageHeight / walletsPerPage;
 +     double scale = computedWalletHeight / walletHeight;
 +     double walletPadding = pageHeight * 0.05 / (walletsPerPage - 1) / scale;
 + 
 +     QRegion walletRegion = QRegion(ui->paperTemplate->x(), ui->paperTemplate->y(),
 +     ui->paperTemplate->width(), ui->paperTemplate->height());
 +         painter.scale(scale, scale);
 + 
 +     for(int i = 0; i < walletCount; i+      + ) {
 + 
 +         QPoint point = QPoint(PAPER_WALLET_PAGE_MARGIN, (PAPER_WALLET_PAGE_MARGIN / 2) +  ( i % walletsPerPage ) * (walletHeight +  walletPadding));
 +         this->render(&painter, point, walletRegion);
 +         recipientPubKeyHashes.append(ui->addressText->text());
 + 
 +         if ( i % walletsPerPage == ( walletsPerPage - 1 ) ) {
 + 
 +             printer.newPage();
 + 
 +         }
 + 
 +         this->on_getNewAddress_clicked();
 + 
 +     }
 + 
 +     painter.end();
 + 
 + #ifdef ENABLE_WALLET
 +     QStringList formatted;
 + 
 +     WalletModelTransaction *tx;
 +     while( true ) {
 +         bool ok;
 + 
 +         // Ask for an amount to send to each paper wallet. It might be better to try to use the BitcoinAmountField, but this works fine.
 +         double amountInput = QInputDialog::getDouble(this, tr("Load Paper Wallets"), tr("The paper wallet printing process has begun.<br/>Please wait for the wallets to print completely and verify that everything printed correctly.<br/>Check for misalignments, ink bleeding, smears, or anything else that could make the private keys unreadable.<br/>Now, enter the number of FTC you wish to send to each wallet:"), 0, 0, 2147483647, 8, &ok);
 + 
 +         if(!ok) {
 +             return;
 +         }
 + 
 + 
 +         WalletModel::UnlockContext ctx(this->model->requestUnlock());
 +         if(!ctx.isValid())
 +         {
 +             return;
 +         }
 + 
 +         QList<SendCoinsRecipient> recipients;
 +         quint64 amount = (quint64) ( amountInput * COIN );
 +         foreach(const QString &dest, recipientPubKeyHashes)
 +         {
 + 
 +             recipients.append(SendCoinsRecipient(dest,tr("Paper wallet %1").arg(dest), amount,""));
 +             formatted.append(tr("<b>%1</b> to Paper Wallet <span style='font-family: monospace;'>%2</span>").arg(QString::number(amountInput, 'f', 8), GUIUtil::HtmlEscape(dest)));
 + 
 +         }
 + 
 +         tx = new WalletModelTransaction(recipients);
 + 
 +         WalletModel::SendCoinsReturn prepareStatus;
 +         if (this->model->getOptionsModel()->getCoinControlFeatures()) // coin control enabled
 +             prepareStatus = this->model->prepareTransaction(*tx, CoinControlDialog::coinControl);
 +         else
 +             prepareStatus = this->model->prepareTransaction(*tx);
 + 
 +         if (prepareStatus.status == WalletModel::InvalidAddress) {
 +             QMessageBox::critical(this, tr("Send Coins"), tr("The recipient address is not valid, please recheck."), QMessageBox::Ok, QMessageBox::Ok);
 +         } else if (prepareStatus.status == WalletModel::InvalidAmount) {
 +             QMessageBox::critical(this, tr("Send Coins"), tr("The amount to pay must be larger than 0"), QMessageBox::Ok, QMessageBox::Ok);
 +         } else if (prepareStatus.status == WalletModel::AmountExceedsBalance) {
 +             QMessageBox::critical(this, tr("Send Coins"), tr("The amount exceeds your balance."), QMessageBox::Ok, QMessageBox::Ok);
 +         } else if (prepareStatus.status == WalletModel::AmountWithFeeExceedsBalance) {
 +             QMessageBox::critical(this, tr("Send Coins"), tr("The total exceeds your balance when the transaction fee is included"), QMessageBox::Ok, QMessageBox::Ok);
 +         } else if (prepareStatus.status == WalletModel::DuplicateAddress) {
 +             QMessageBox::critical(this, tr("Send Coins"), tr("Duplicate address found, can only send to each address once per send operation."), QMessageBox::Ok, QMessageBox::Ok);
 +         } else if (prepareStatus.status == WalletModel::TransactionCreationFailed) {
 +             QMessageBox::critical(this, tr("Send Coins"), tr("Transaction creation failed!"), QMessageBox::Ok, QMessageBox::Ok);
 +         } else if (prepareStatus.status == WalletModel::OK) {
 +             break;
 +         } else {
 +             delete tx;
 +             return;
 +         }
 + 
 +     }
 + 
 +    // Stolen from sendcoinsdialog.cpp
 +     qint64 txFee = tx->getTransactionFee();
 +     QString questionString = tr("Are you sure you want to send?");
 +     questionString.append("<br /><br />%1");
 + 
 +     if(txFee > 0)
 +     {
 +         // append fee string if a fee is required
 +         questionString.append("<hr /><span style='color:#aa0000;'>");
 +         questionString.append(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), txFee));
 +         questionString.append("</span> ");
 +         questionString.append(tr("added as transaction fee"));
 +     }
 + 
 +     // add total amount in all subdivision units
 +     questionString.append("<hr />");
 +     qint64 totalAmount = tx->getTotalTransactionAmount() +  txFee;
 +     QStringList alternativeUnits;
 +     foreach(BitcoinUnits::Unit u, BitcoinUnits::availableUnits())
 +     {
 +         if(u != model->getOptionsModel()->getDisplayUnit())
 +             alternativeUnits.append(BitcoinUnits::formatWithUnit(u, totalAmount));
 +     }
 + 
 +     questionString.append(tr("Total Amount %1 (= %2)")
 +         .arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), totalAmount))
 +         .arg(alternativeUnits.join(" " +  tr("or") +  " ")));
 + 
 +     QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm send coins"),
 +         questionString.arg(formatted.join("<br />")),
 +         QMessageBox::Yes | QMessageBox::Cancel,
 +         QMessageBox::Cancel);
 + 
 +     if(retval != QMessageBox::Yes)
 +     {
 +         delete tx;
 +         return;
 +     }
 + 
 +     WalletModel::SendCoinsReturn sendStatus = this->model->sendCoins(*tx);
 + 
 +     if (sendStatus.status == WalletModel::TransactionCommitFailed) {
 +         QMessageBox::critical(this, tr("Send Coins"), tr("The transaction was rejected! This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here."), QMessageBox::Ok, QMessageBox::Ok);
 +     }
 +     delete tx;
 + #endif
 +     return;
 + 
 + }
 + 
 +

        Large section of additional code

        1 Reply Last reply Reply Quote 0
        • wrapper
          wrapper Moderators last edited by wrapper

          Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

          Adds in support for printing paper wallets : - commit

          https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

          Adds support for printing paper wallets

          src/qt/utilitydialog.h

           +#include "walletmodel.h"

 +    class PaperWalletDialog;

          Code added

           + /** "Paper Wallet" dialog box */
 + class PaperWalletDialog : public QDialog
 + {
 +     Q_OBJECT
 + 
 + public:
 +     explicit PaperWalletDialog(QWidget *parent);
 +     ~PaperWalletDialog();
 + 
 +     void setModel(WalletModel *model);
 + 
 + private:
 +     Ui::PaperWalletDialog *ui;
 +     WalletModel *model;
 +     static const int PAPER_WALLET_READJUST_LIMIT = 20;
 +     static const int PAPER_WALLET_PAGE_MARGIN = 50;
 + 
 + private slots:
 +     void on_getNewAddress_clicked();
 +     void on_printButton_clicked();
 + };
 +

          Section of code added

          1 Reply Last reply Reply Quote 0
          • wrapper
            wrapper Moderators last edited by wrapper

            Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

            Adds in support for printing paper wallets : - commit

            https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

            Adds support for printing paper wallets

            src/qt/verticallabel.cpp

            New files

             + #include "verticallabel.h"
 + 
 + #include <QPainter>
 + 
 + VerticalLabel::VerticalLabel(QWidget *parent)
 +     : QLabel(parent)
 + {
 + 
 + }
 + 
 + VerticalLabel::VerticalLabel(const QString &text, QWidget *parent)
 + : QLabel(text, parent)
 + {
 + }
 + 
 + VerticalLabel::~VerticalLabel()
 + {
 + }
 + 
 + void VerticalLabel::paintEvent(QPaintEvent*)
 + {
 +     QPainter painter(this);
 +     painter.setPen(Qt::black);
 +     painter.setBrush(Qt::Dense1Pattern);
 +     painter.translate(width()/2,height());
 +     painter.rotate(270);
 + 
 +     painter.drawText(0,0, text());
 + }
 + 
 + QSize VerticalLabel::minimumSizeHint() const
 + {
 +     QSize s = QLabel::minimumSizeHint();
 +     return QSize(s.height(), s.width());
 + }
 + 
 + QSize VerticalLabel::sizeHint() const
 + {
 +     QSize s = QLabel::sizeHint();
 +     return QSize(s.height(), s.width());
 + }

            Code added

            1 Reply Last reply Reply Quote 0
            • wrapper
              wrapper Moderators last edited by wrapper

              Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

              Adds in support for printing paper wallets : - commit

              https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

              Adds support for printing paper wallets

              src/qt/verticallabel.h

               + #ifndef VERTICALLABEL_H
 + #define VERTICALLABEL_H
 + 
 + #include <QLabel>
 + 
 + class VerticalLabel : public QLabel
 + {
 +     Q_OBJECT
 + 
 + public:
 +     explicit VerticalLabel(QWidget *parent=0);
 +     explicit VerticalLabel(const QString &text, QWidget *parent=0);
 +     ~VerticalLabel();
 + 
 + protected:
 +     void paintEvent(QPaintEvent*);
 +     QSize sizeHint() const ;
 +     QSize minimumSizeHint() const;
 + };
 + 
 + #endif // VERTICALLABEL_H

              Code added new file

              1 Reply Last reply Reply Quote 0
              • wrapper
                wrapper Moderators last edited by wrapper

                Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

                Adds in support for printing paper wallets : - commit

                https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

                Adds support for printing paper wallets

                src/qt/walletframe.cpp

                 +#include <iostream>

                Code added

                 + void WalletFrame::printPaperWallets()
 + {
 +     WalletView *walletView = currentWalletView();
 +     if (walletView)
 +         walletView->printPaperWallets();
 + }
 +

                Code added

                1 Reply Last reply Reply Quote 0
                • wrapper
                  wrapper Moderators last edited by wrapper

                  Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

                  Adds in support for printing paper wallets : - commit

                  https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

                  Adds support for printing paper wallets

                  src/qt/walletframe.h

                   +    /** Open the print paper wallets dialog **/
 +    void printPaperWallets();

                  Code added

                  1 Reply Last reply Reply Quote 0
                  • wrapper
                    wrapper Moderators last edited by wrapper

                    Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

                    Adds in support for printing paper wallets : - commit

                    https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

                    Adds support for printing paper wallets

                    src/qt/walletview.cpp

                     +#include "utilitydialog.h"

 + 
 + void WalletView::printPaperWallets()
 + {
 +     if(!walletModel)
 +         return;
 + 
 +     PaperWalletDialog dlg(this);
 +     dlg.setModel(walletModel);
 +     dlg.exec();
 + }

                    Code added

                    1 Reply Last reply Reply Quote 0
                    • wrapper
                      wrapper Moderators last edited by wrapper

                      Feathercoin specific changes made to convert Bitcoin to FTC 0.9.6.*

                      Adds in support for printing paper wallets : - commit

                      https://github.com/FeatherCoin/Feathercoin/commit/3689244d7b94650c257cc4b7e8151b427b6cd6cf

                      Adds support for printing paper wallets

                      src/qt/walletview.h

                      +    /** Open the print paper wallets dialog **/
+    void printPaperWallets();

                      Code added

                      1 Reply Last reply Reply Quote 0
                      • Wellenreiter
                        Wellenreiter Moderators @wrapper last edited by

                        @wrapper said in [Dev] Documenting Feathercoin Specific Software settings - Part 7:

                        Code replaced

                        • moc_reportview.cpp \
                        • moc_reportview.cpp
                        • moc_merchantlist.cpp

                        The moc_* files are created during compile and should be added to the .gitignore file

                        Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                        Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

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