[gui] Load PSBT from clipboard

Author: gwillen

src/qt/bitcoingui.cpp

@@ -323,6 +323,8 @@ void BitcoinGUI::createActions()
     verifyMessageAction->setStatusTip(tr("Verify messages to ensure they were signed with specified Bitcoin addresses"));
     m_load_psbt_action = new QAction(tr("&Load PSBT from file..."), this);
     m_load_psbt_action->setStatusTip(tr("Load Partially Signed Bitcoin Transaction"));
+    m_load_psbt_clipboard_action = new QAction(tr("Load PSBT from clipboard..."), this);
+    m_load_psbt_clipboard_action->setStatusTip(tr("Load Partially Signed Bitcoin Transaction from clipboard"));
 
     openRPCConsoleAction = new QAction(tr("Node window"), this);
     openRPCConsoleAction->setStatusTip(tr("Open node debugging and diagnostic console"));
@@ -381,6 +383,7 @@ void BitcoinGUI::createActions()
         connect(signMessageAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
         connect(signMessageAction, &QAction::triggered, [this]{ gotoSignMessageTab(); });
         connect(m_load_psbt_action, &QAction::triggered, [this]{ gotoLoadPSBT(); });
+        connect(m_load_psbt_clipboard_action, &QAction::triggered, [this]{ gotoLoadPSBT(true); });
         connect(verifyMessageAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
         connect(verifyMessageAction, &QAction::triggered, [this]{ gotoVerifyMessageTab(); });
         connect(usedSendingAddressesAction, &QAction::triggered, walletFrame, &WalletFrame::usedSendingAddresses);
@@ -459,6 +462,7 @@ void BitcoinGUI::createMenuBar()
         file->addAction(signMessageAction);
         file->addAction(verifyMessageAction);
         file->addAction(m_load_psbt_action);
+        file->addAction(m_load_psbt_clipboard_action);
         file->addSeparator();
     }
     file->addAction(quitAction);
@@ -878,9 +882,9 @@ void BitcoinGUI::gotoVerifyMessageTab(QString addr)
 {
     if (walletFrame) walletFrame->gotoVerifyMessageTab(addr);
 }
-void BitcoinGUI::gotoLoadPSBT()
+void BitcoinGUI::gotoLoadPSBT(bool from_clipboard)
 {
-    if (walletFrame) walletFrame->gotoLoadPSBT();
+    if (walletFrame) walletFrame->gotoLoadPSBT(from_clipboard);
 }
 #endif // ENABLE_WALLET
 

src/qt/bitcoingui.h

@@ -139,6 +139,7 @@ class BitcoinGUI : public QMainWindow
     QAction* signMessageAction = nullptr;
     QAction* verifyMessageAction = nullptr;
     QAction* m_load_psbt_action = nullptr;
+    QAction* m_load_psbt_clipboard_action = nullptr;
     QAction* aboutAction = nullptr;
     QAction* receiveCoinsAction = nullptr;
     QAction* receiveCoinsMenuAction = nullptr;
@@ -278,8 +279,8 @@ public Q_SLOTS:
     void gotoSignMessageTab(QString addr = "");
     /** Show Sign/Verify Message dialog and switch to verify message tab */
     void gotoVerifyMessageTab(QString addr = "");
-    /** Show load Partially Signed Bitcoin Transaction dialog */
-    void gotoLoadPSBT();
+    /** Load Partially Signed Bitcoin Transaction from file or clipboard */
+    void gotoLoadPSBT(bool from_clipboard = false);
 
     /** Show open dialog */
     void openClicked();

src/qt/walletframe.cpp

@@ -165,11 +165,11 @@ void WalletFrame::gotoVerifyMessageTab(QString addr)
         walletView->gotoVerifyMessageTab(addr);
 }
 
-void WalletFrame::gotoLoadPSBT()
+void WalletFrame::gotoLoadPSBT(bool from_clipboard)
 {
     WalletView *walletView = currentWalletView();
     if (walletView) {
-        walletView->gotoLoadPSBT();
+        walletView->gotoLoadPSBT(from_clipboard);
     }
 }
 

src/qt/walletframe.h

@@ -79,7 +79,7 @@ public Q_SLOTS:
     void gotoVerifyMessageTab(QString addr = "");
 
     /** Load Partially Signed Bitcoin Transaction */
-    void gotoLoadPSBT();
+    void gotoLoadPSBT(bool from_clipboard = false);
 
     /** Encrypt the wallet */
     void encryptWallet(bool status);

src/qt/walletview.cpp

@@ -28,6 +28,8 @@
 
 #include <QAction>
 #include <QActionGroup>
+#include <QApplication>
+#include <QClipboard>
 #include <QFileDialog>
 #include <QHBoxLayout>
 #include <QProgressDialog>
@@ -205,23 +207,35 @@ void WalletView::gotoVerifyMessageTab(QString addr)
         signVerifyMessageDialog->setAddress_VM(addr);
 }
 
-void WalletView::gotoLoadPSBT()
+void WalletView::gotoLoadPSBT(bool from_clipboard)
 {
-    QString filename = GUIUtil::getOpenFileName(this,
-        tr("Load Transaction Data"), QString(),
-        tr("Partially Signed Transaction (*.psbt)"), nullptr);
-    if (filename.isEmpty()) return;
-    if (GetFileSize(filename.toLocal8Bit().data(), MAX_FILE_SIZE_PSBT) == MAX_FILE_SIZE_PSBT) {
-        Q_EMIT message(tr("Error"), tr("PSBT file must be smaller than 100 MiB"), CClientUIInterface::MSG_ERROR);
-        return;
+    std::string data;
+
+    if (from_clipboard) {
+        std::string raw = QApplication::clipboard()->text().toStdString();
+        bool invalid;
+        data = DecodeBase64(raw, &invalid);
+        if (invalid) {
+            Q_EMIT message(tr("Error"), tr("Unable to decode PSBT from clipboard (invalid base64)"), CClientUIInterface::MSG_ERROR);
+            return;
+        }
+    } else {
+        QString filename = GUIUtil::getOpenFileName(this,
+            tr("Load Transaction Data"), QString(),
+            tr("Partially Signed Transaction (*.psbt)"), nullptr);
+        if (filename.isEmpty()) return;
+        if (GetFileSize(filename.toLocal8Bit().data(), MAX_FILE_SIZE_PSBT) == MAX_FILE_SIZE_PSBT) {
+            Q_EMIT message(tr("Error"), tr("PSBT file must be smaller than 100 MiB"), CClientUIInterface::MSG_ERROR);
+            return;
+        }
+        std::ifstream in(filename.toLocal8Bit().data(), std::ios::binary);
+        data = std::string(std::istreambuf_iterator<char>{in}, {});
     }
-    std::ifstream in(filename.toLocal8Bit().data(), std::ios::binary);
-    std::string data(std::istreambuf_iterator<char>{in}, {});
 
     std::string error;
     PartiallySignedTransaction psbtx;
     if (!DecodeRawPSBT(psbtx, data, error)) {
-        Q_EMIT message(tr("Error"), tr("Unable to decode PSBT file") + "\n" + QString::fromStdString(error), CClientUIInterface::MSG_ERROR);
+        Q_EMIT message(tr("Error"), tr("Unable to decode PSBT") + "\n" + QString::fromStdString(error), CClientUIInterface::MSG_ERROR);
         return;
     }
 

src/qt/walletview.h

@@ -84,7 +84,7 @@ public Q_SLOTS:
     /** Show Sign/Verify Message dialog and switch to verify message tab */
     void gotoVerifyMessageTab(QString addr = "");
     /** Load Partially Signed Bitcoin Transaction */
-    void gotoLoadPSBT();
+    void gotoLoadPSBT(bool from_clipboard = false);
 
     /** Show incoming transaction notification for new transactions.