psbt combining, transaction viewer updating

drongo

@@ -1 +1 @@
-Subproject commit 70d0b7afcd6f0575bf424a45f54dd6e039057dba
+Subproject commit 0466755883c19a9e679f5e937b2f7db55a73e05b

src/main/java/com/sparrowwallet/sparrow/AppController.java

@@ -703,7 +703,15 @@ public class AppController implements Initializable {
             TabData tabData = (TabData)tab.getUserData();
             if(tabData instanceof TransactionTabData) {
                 TransactionTabData transactionTabData = (TransactionTabData)tabData;
-                if(transactionTabData.getTransaction().getTxId().equals(transaction.getTxId())) {
+
+                //If an exact match bytewise of an existing tab, return that tab
+                if(Arrays.equals(transactionTabData.getTransaction().bitcoinSerialize(), transaction.bitcoinSerialize())) {
+                    //As per BIP174, combine PSBTs with matching transactions
+                    if(transactionTabData.getPsbt() != null && psbt != null) {
+                        transactionTabData.getPsbt().combine(psbt);
+                        EventManager.get().post(new PSBTCombinedEvent(transactionTabData.getPsbt()));
+                    }
+
                     return tab;
                 }
             }
@@ -717,7 +725,7 @@ public class AppController implements Initializable {
             }
 
             Tab tab = new Tab(tabName);
-            TabData tabData = new TransactionTabData(TabData.TabType.TRANSACTION, transaction);
+            TabData tabData = new TransactionTabData(TabData.TabType.TRANSACTION, transaction, psbt);
             tab.setUserData(tabData);
             tab.setContextMenu(getTabContextMenu(tab));
             tab.setClosable(true);
@@ -733,6 +741,8 @@ public class AppController implements Initializable {
                 controller.setTransaction(transaction);
             }
 
+            controller.setName(name);
+
             if(initialView != null) {
                 controller.setInitialView(initialView, initialIndex);
             }
@@ -919,4 +929,9 @@ public class AppController implements Initializable {
     public void requestWalletOpen(RequestWalletOpenEvent event) {
         openWallet(null);
     }
+
+    @Subscribe
+    public void requestTransactionOpen(RequestTransactionOpenEvent event) {
+        openTransactionFromFile(null);
+    }
 }

src/main/java/com/sparrowwallet/sparrow/BaseController.java

@@ -1,108 +1,37 @@
 package com.sparrowwallet.sparrow;
 
-import com.sparrowwallet.drongo.protocol.Script;
 import com.sparrowwallet.drongo.protocol.ScriptChunk;
-import com.sparrowwallet.sparrow.transaction.ScriptContextMenu;
+import com.sparrowwallet.sparrow.control.ScriptArea;
 import javafx.geometry.Point2D;
 import javafx.scene.control.Label;
 import javafx.stage.Popup;
-import org.fxmisc.richtext.CodeArea;
 import org.fxmisc.richtext.event.MouseOverTextEvent;
 import org.fxmisc.richtext.model.TwoDimensional;
 
 import java.time.Duration;
 
-import static com.sparrowwallet.drongo.protocol.ScriptType.*;
-import static com.sparrowwallet.drongo.protocol.ScriptType.P2WSH;
 import static org.fxmisc.richtext.model.TwoDimensional.Bias.Backward;
 
 public abstract class BaseController {
-    protected void appendScript(CodeArea codeArea, Script script) {
-        appendScript(codeArea, script, null, null);
-    }
-
-    protected void appendScript(CodeArea codeArea, Script script, Script redeemScript, Script witnessScript) {
-        if(P2PKH.isScriptType(script)) {
-            codeArea.append(script.getChunks().get(0).toString(), "script-opcode");
-            codeArea.append(" ", "");
-            codeArea.append(script.getChunks().get(1).toString(), "script-opcode");
-            codeArea.append(" ", "");
-            codeArea.append("<pkh>", "script-hash");
-            codeArea.append(" ", "");
-            codeArea.append(script.getChunks().get(3).toString(), "script-opcode");
-            codeArea.append(" ", "");
-            codeArea.append(script.getChunks().get(4).toString(), "script-opcode");
-        } else if(P2SH.isScriptType(script)) {
-            codeArea.append(script.getChunks().get(0).toString(), "script-opcode");
-            codeArea.append(" ", "");
-            codeArea.append("<sh>", "script-hash");
-            codeArea.append(" ", "");
-            codeArea.append(script.getChunks().get(2).toString(), "script-opcode");
-        } else if(P2WPKH.isScriptType(script)) {
-            codeArea.append(script.getChunks().get(0).toString(), "script-opcode");
-            codeArea.append(" ", "");
-            codeArea.append("<wpkh>", "script-hash");
-        } else if(P2WSH.isScriptType(script)) {
-            codeArea.append(script.getChunks().get(0).toString(), "script-opcode");
-            codeArea.append(" ", "");
-            codeArea.append("<wsh>", "script-hash");
-        } else {
-            int signatureCount = 1;
-            int pubKeyCount = 1;
-            for (int i = 0; i < script.getChunks().size(); i++) {
-                ScriptChunk chunk = script.getChunks().get(i);
-                if(chunk.isOpCode()) {
-                    codeArea.append(chunk.toString(), "script-opcode");
-                } else if(chunk.isSignature()) {
-                    codeArea.append("<signature" + signatureCount++ + ">", "script-signature");
-                } else if(chunk.isPubKey()) {
-                    codeArea.append("<pubkey" + pubKeyCount++ + ">", "script-pubkey");
-                } else if(chunk.isScript()) {
-                    Script nestedScript = chunk.getScript();
-                    if (nestedScript.equals(redeemScript)) {
-                        codeArea.append("<RedeemScript>", "script-redeem");
-                    } else if (nestedScript.equals(witnessScript)) {
-                        codeArea.append("<WitnessScript>", "script-redeem");
-                    } else {
-                        codeArea.append("(", "script-nest");
-                        appendScript(codeArea, nestedScript);
-                        codeArea.append(")", "script-nest");
-                    }
-                } else {
-                    codeArea.append(chunk.toString(), "script-other");
-                }
-
-                if(i < script.getChunks().size() - 1) {
-                    codeArea.append(" ", "");
-                }
-            }
-        }
-
-        addScriptPopup(codeArea, script);
-    }
-
-    protected void addScriptPopup(CodeArea area, Script script) {
-        ScriptContextMenu contextMenu = new ScriptContextMenu(area, script);
-        area.setContextMenu(contextMenu);
-
+    protected void initializeScriptField(ScriptArea scriptArea) {
         Popup popup = new Popup();
         Label popupMsg = new Label();
         popupMsg.getStyleClass().add("tooltip");
         popup.getContent().add(popupMsg);
 
-        area.setMouseOverTextDelay(Duration.ofMillis(150));
-        area.addEventHandler(MouseOverTextEvent.MOUSE_OVER_TEXT_BEGIN, e -> {
-            TwoDimensional.Position position = area.getParagraph(0).getStyleSpans().offsetToPosition(e.getCharacterIndex(), Backward);
+        scriptArea.setMouseOverTextDelay(Duration.ofMillis(150));
+        scriptArea.addEventHandler(MouseOverTextEvent.MOUSE_OVER_TEXT_BEGIN, e -> {
+            TwoDimensional.Position position = scriptArea.getParagraph(0).getStyleSpans().offsetToPosition(e.getCharacterIndex(), Backward);
             if(position.getMajor() % 2 == 0) {
-                ScriptChunk hoverChunk = script.getChunks().get(position.getMajor()/2);
+                ScriptChunk hoverChunk = scriptArea.getScript().getChunks().get(position.getMajor()/2);
                 if(!hoverChunk.isOpCode()) {
                     Point2D pos = e.getScreenPosition();
                     popupMsg.setText(describeScriptChunk(hoverChunk));
-                    popup.show(area, pos.getX(), pos.getY() + 10);
+                    popup.show(scriptArea, pos.getX(), pos.getY() + 10);
                 }
             }
         });
-        area.addEventHandler(MouseOverTextEvent.MOUSE_OVER_TEXT_END, e -> {
+        scriptArea.addEventHandler(MouseOverTextEvent.MOUSE_OVER_TEXT_END, e -> {
             popup.hide();
         });
     }

src/main/java/com/sparrowwallet/sparrow/TransactionTabData.java

@@ -1,16 +1,27 @@
 package com.sparrowwallet.sparrow;
 
 import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.psbt.PSBT;
 
 public class TransactionTabData extends TabData {
-    private Transaction transaction;
+    private final Transaction transaction;
+    private final PSBT psbt;
 
     public TransactionTabData(TabType type, Transaction transaction) {
+        this(type, transaction, null);
+    }
+
+    public TransactionTabData(TabType type, Transaction transaction, PSBT psbt) {
         super(type);
         this.transaction = transaction;
+        this.psbt = psbt;
     }
 
     public Transaction getTransaction() {
         return transaction;
     }
+
+    public PSBT getPsbt() {
+        return psbt;
+    }
 }

src/main/java/com/sparrowwallet/sparrow/control/ScriptArea.java

@@ -0,0 +1,99 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.sparrowwallet.drongo.protocol.Script;
+import com.sparrowwallet.drongo.protocol.ScriptChunk;
+import com.sparrowwallet.sparrow.transaction.ScriptContextMenu;
+import javafx.geometry.Pos;
+import org.controlsfx.control.decoration.Decorator;
+import org.controlsfx.control.decoration.GraphicDecoration;
+import org.fxmisc.richtext.CodeArea;
+
+import static com.sparrowwallet.drongo.protocol.ScriptType.*;
+
+public class ScriptArea extends CodeArea {
+    private Script script;
+
+    public void appendScript(Script script) {
+        appendScript(script, null, null);
+    }
+
+    public void appendScript(Script script, Script redeemScript, Script witnessScript) {
+        if(this.script == null) {
+            this.script = script;
+            ScriptContextMenu contextMenu = new ScriptContextMenu(this, script);
+            setContextMenu(contextMenu);
+        }
+
+        if(P2PKH.isScriptType(script)) {
+            append(script.getChunks().get(0).toString(), "script-opcode");
+            append(" ", "");
+            append(script.getChunks().get(1).toString(), "script-opcode");
+            append(" ", "");
+            append("<pkh>", "script-hash");
+            append(" ", "");
+            append(script.getChunks().get(3).toString(), "script-opcode");
+            append(" ", "");
+            append(script.getChunks().get(4).toString(), "script-opcode");
+        } else if(P2SH.isScriptType(script)) {
+            append(script.getChunks().get(0).toString(), "script-opcode");
+            append(" ", "");
+            append("<sh>", "script-hash");
+            append(" ", "");
+            append(script.getChunks().get(2).toString(), "script-opcode");
+        } else if(P2WPKH.isScriptType(script)) {
+            append(script.getChunks().get(0).toString(), "script-opcode");
+            append(" ", "");
+            append("<wpkh>", "script-hash");
+        } else if(P2WSH.isScriptType(script)) {
+            append(script.getChunks().get(0).toString(), "script-opcode");
+            append(" ", "");
+            append("<wsh>", "script-hash");
+        } else {
+            int signatureCount = 1;
+            int pubKeyCount = 1;
+            for (int i = 0; i < script.getChunks().size(); i++) {
+                ScriptChunk chunk = script.getChunks().get(i);
+                if(chunk.isOpCode()) {
+                    append(chunk.toString(), "script-opcode");
+                } else if(chunk.isSignature()) {
+                    append("<signature" + signatureCount++ + ">", "script-signature");
+                } else if(chunk.isPubKey()) {
+                    append("<pubkey" + pubKeyCount++ + ">", "script-pubkey");
+                } else if(chunk.isScript()) {
+                    Script nestedScript = chunk.getScript();
+                    if (nestedScript.equals(redeemScript)) {
+                        append("<RedeemScript>", "script-redeem");
+                    } else if(nestedScript.equals(witnessScript)) {
+                        append("<WitnessScript>", "script-redeem");
+                    } else {
+                        append("(", "script-nest");
+                        appendScript(nestedScript);
+                        append(")", "script-nest");
+                    }
+                } else {
+                    append(chunk.toString(), "script-other");
+                }
+
+                if(i < script.getChunks().size() - 1) {
+                    append(" ", "");
+                }
+            }
+        }
+    }
+
+    public void clear() {
+        super.clear();
+        this.script = null;
+        setDisable(false);
+        setContextMenu(null);
+        Decorator.removeAllDecorations(this);
+    }
+
+    public void addPSBTDecoration(String description, String styleClass) {
+        Decorator.addDecoration(this, new GraphicDecoration(new TextDecoration("PSBT", description, styleClass), Pos.TOP_RIGHT));
+    }
+
+    public Script getScript() {
+        return script;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/PSBTCombinedEvent.java

@@ -0,0 +1,9 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.psbt.PSBT;
+
+public class PSBTCombinedEvent extends PSBTEvent {
+    public PSBTCombinedEvent(PSBT psbt) {
+        super(psbt);
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/PSBTEvent.java

@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.psbt.PSBT;
+
+public class PSBTEvent {
+    private final PSBT psbt;
+
+    public PSBTEvent(PSBT psbt) {
+        this.psbt = psbt;
+    }
+
+    public PSBT getPsbt() {
+        return psbt;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/RequestTransactionOpenEvent.java

@@ -0,0 +1,5 @@
+package com.sparrowwallet.sparrow.event;
+
+public class RequestTransactionOpenEvent {
+    //Empty event class used to request the transaction open dialog
+}

src/main/java/com/sparrowwallet/sparrow/glyphfont/FontAwesome5.java

@@ -15,6 +15,8 @@ public class FontAwesome5 extends GlyphFont {
      * The individual glyphs offered by the FontAwesome5 font.
      */
     public static enum Glyph implements INamedCharacter {
+        ARROW_UP('\uf062'),
+        CAMERA('\uf030'),
         CHECK_CIRCLE('\uf058'),
         CIRCLE('\uf111'),
         COINS('\uf51e'),

src/main/java/com/sparrowwallet/sparrow/transaction/HeadersController.java

@@ -21,6 +21,8 @@ import javafx.fxml.Initializable;
 import javafx.scene.control.*;
 import javafx.scene.input.Clipboard;
 import javafx.scene.input.ClipboardContent;
+import javafx.stage.FileChooser;
+import javafx.stage.Stage;
 import org.controlsfx.glyphfont.Glyph;
 import tornadofx.control.DateTimePicker;
 import tornadofx.control.Field;
@@ -29,7 +31,10 @@ import com.google.common.eventbus.Subscribe;
 import tornadofx.control.Form;
 
 import java.io.File;
+import java.io.IOException;
+import java.io.PrintWriter;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.text.SimpleDateFormat;
 import java.time.*;
 import java.util.*;
@@ -434,11 +439,47 @@ public class HeadersController extends TransactionFormController implements Init
     }
 
     public void showPSBT(ActionEvent event) {
+        ToggleButton toggleButton = (ToggleButton)event.getSource();
+        toggleButton.setSelected(false);
+
         headersForm.getSignedKeystores().add(headersForm.getSigningWallet().getKeystores().get(0));
     }
 
+    public void scanPSBT(ActionEvent event) {
+        ToggleButton toggleButton = (ToggleButton)event.getSource();
+        toggleButton.setSelected(false);
+    }
+
     public void savePSBT(ActionEvent event) {
+        ToggleButton toggleButton = (ToggleButton)event.getSource();
+        toggleButton.setSelected(false);
+
+        Stage window = new Stage();
+
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("Save PSBT");
 
+        if(headersForm.getName() != null && !headersForm.getName().isEmpty()) {
+            fileChooser.setInitialFileName(headersForm.getName() + ".psbt");
+        }
+
+        File file = fileChooser.showSaveDialog(window);
+        if(file != null) {
+            try {
+                try(PrintWriter writer = new PrintWriter(file, StandardCharsets.UTF_8)) {
+                    writer.print(headersForm.getPsbt().toBase64String());
+                }
+            } catch(IOException e) {
+                AppController.showErrorDialog("Error saving PSBT", "Cannot write to " + file.getAbsolutePath());
+            }
+        }
+    }
+
+    public void loadPSBT(ActionEvent event) {
+        ToggleButton toggleButton = (ToggleButton)event.getSource();
+        toggleButton.setSelected(false);
+
+        EventManager.get().post(new RequestTransactionOpenEvent());
     }
 
     public void signPSBT(ActionEvent event) {
@@ -570,4 +611,11 @@ public class HeadersController extends TransactionFormController implements Init
             signaturesForm.setVisible(true);
         }
     }
+
+    @Subscribe
+    public void psbtCombined(PSBTCombinedEvent event) {
+        if(event.getPsbt().equals(headersForm.getPsbt()) && headersForm.getSigningWallet() != null) {
+            updateSignedKeystores(headersForm.getSigningWallet());
+        }
+    }
 }

src/main/java/com/sparrowwallet/sparrow/transaction/InputController.java

@@ -14,17 +14,12 @@ import com.sparrowwallet.sparrow.event.*;
 import javafx.collections.ListChangeListener;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
-import javafx.geometry.Pos;
-import javafx.scene.Node;
 import javafx.scene.control.*;
-import javafx.scene.control.Button;
 import org.controlsfx.control.ToggleSwitch;
-import org.controlsfx.control.decoration.Decorator;
-import org.controlsfx.control.decoration.GraphicDecoration;
+import org.fxmisc.flowless.VirtualizedScrollPane;
 import org.fxmisc.richtext.CodeArea;
 import tornadofx.control.Field;
 import tornadofx.control.Fieldset;
-import org.fxmisc.flowless.VirtualizedScrollPane;
 
 import java.net.URL;
 import java.time.Duration;
@@ -60,25 +55,25 @@ public class InputController extends TransactionFormController implements Initia
     private AddressLabel address;
 
     @FXML
-    private CodeArea scriptSigArea;
+    private ScriptArea scriptSigArea;
 
     @FXML
     private VirtualizedScrollPane<CodeArea> redeemScriptScroll;
 
     @FXML
-    private CodeArea redeemScriptArea;
+    private ScriptArea redeemScriptArea;
 
     @FXML
     private VirtualizedScrollPane<CodeArea> witnessScriptScroll;
 
     @FXML
-    private CodeArea witnessScriptArea;
+    private ScriptArea witnessScriptArea;
 
     @FXML
     private VirtualizedScrollPane<CodeArea> witnessesScroll;
 
     @FXML
-    private CodeArea witnessesArea;
+    private ScriptArea witnessesArea;
 
     @FXML
     private CopyableLabel signatures;
@@ -130,12 +125,12 @@ public class InputController extends TransactionFormController implements Initia
 
         initializeInputFields(txInput, psbtInput);
         initializeScriptFields(txInput, psbtInput);
-        initializeStatusFields(txInput);
+        initializeStatusFields(txInput, psbtInput);
         initializeLocktimeFields(txInput);
 
         if(psbtInput != null) {
             inputForm.getSignedKeystores().addListener((ListChangeListener<Keystore>) c -> {
-                updateSignatures();
+                updateSignatures(inputForm.getPsbtInput());
             });
         }
     }
@@ -223,6 +218,20 @@ public class InputController extends TransactionFormController implements Initia
     }
 
     private void initializeScriptFields(TransactionInput txInput, PSBTInput psbtInput) {
+        initializeScriptField(scriptSigArea);
+        initializeScriptField(redeemScriptArea);
+        initializeScriptField(witnessesArea);
+        initializeScriptField(witnessScriptArea);
+
+        updateScriptFields(txInput, psbtInput);
+    }
+
+    private void updateScriptFields(TransactionInput txInput, PSBTInput psbtInput) {
+        scriptSigArea.clear();
+        redeemScriptArea.clear();
+        witnessesArea.clear();
+        witnessScriptArea.clear();
+
         //TODO: While we immediately check if the referenced transaction output is P2SH, where this is not present getting the first nested script is not safe
         Script redeemScript = txInput.getScriptSig().getFirstNestedScript();
         if(redeemScript != null && inputForm.getReferencedTransactionOutput() != null) {
@@ -233,31 +242,27 @@ public class InputController extends TransactionFormController implements Initia
         }
 
         if(redeemScript == null && psbtInput != null && psbtInput.getRedeemScript() != null) {
-            addPSBTDecoration(redeemScriptArea, "PSBT Redeem Script", "non-final");
+            redeemScriptArea.addPSBTDecoration("PSBT Redeem Script", "non-final");
             redeemScript = psbtInput.getRedeemScript();
         }
         if(redeemScript == null && psbtInput != null && psbtInput.getFinalScriptSig() != null) {
-            addPSBTDecoration(redeemScriptArea, "PSBT Final ScriptSig", "final");
+            redeemScriptArea.addPSBTDecoration("PSBT Final ScriptSig", "final");
             redeemScript = psbtInput.getFinalScriptSig().getFirstNestedScript();
         }
 
-        scriptSigArea.clear();
         if(txInput.getScriptSig().isEmpty() && psbtInput != null && psbtInput.getFinalScriptSig() != null) {
-            appendScript(scriptSigArea, psbtInput.getFinalScriptSig(), redeemScript, null);
-            addPSBTDecoration(scriptSigArea, "PSBT Final ScriptSig", "final");
+            scriptSigArea.appendScript(psbtInput.getFinalScriptSig(), redeemScript, null);
+            scriptSigArea.addPSBTDecoration("PSBT Final ScriptSig", "final");
         } else {
-            appendScript(scriptSigArea, txInput.getScriptSig(), redeemScript, null);
+            scriptSigArea.appendScript(txInput.getScriptSig(), redeemScript, null);
         }
 
-        redeemScriptArea.clear();
         if(redeemScript != null) {
-            appendScript(redeemScriptArea, redeemScript);
+            redeemScriptArea.appendScript(redeemScript);
         } else {
             redeemScriptScroll.setDisable(true);
         }
 
-        witnessesArea.clear();
-        witnessScriptArea.clear();
         Script witnesses = null;
         Script witnessScript = null;
 
@@ -268,36 +273,31 @@ public class InputController extends TransactionFormController implements Initia
             if(psbtInput.getFinalScriptWitness() != null) {
                 witnesses = new Script(psbtInput.getFinalScriptWitness().asScriptChunks());
                 witnessScript = psbtInput.getFinalScriptWitness().getWitnessScript();
-                addPSBTDecoration(witnessesArea, "PSBT Final ScriptWitness", "final");
-                addPSBTDecoration(witnessScriptArea, "PSBT Final ScriptWitness", "final");
+                witnessesArea.addPSBTDecoration("PSBT Final ScriptWitness", "final");
+                witnessScriptArea.addPSBTDecoration("PSBT Final ScriptWitness", "final");
             } else if(psbtInput.getWitnessScript() != null) {
                 witnessScript = psbtInput.getWitnessScript();
-                addPSBTDecoration(witnessScriptArea, "PSBT Witness Script", "non-final");
+                witnessScriptArea.addPSBTDecoration("PSBT Witness Script", "non-final");
             }
         }
 
         if(witnesses != null) {
-            appendScript(witnessesArea, witnesses, null, witnessScript);
+            witnessesArea.appendScript(witnesses, null, witnessScript);
         } else {
             witnessesScroll.setDisable(true);
         }
 
         if(witnessScript != null) {
-            appendScript(witnessScriptArea, witnessScript);
+            witnessScriptArea.appendScript(witnessScript);
         } else {
             witnessScriptScroll.setDisable(true);
         }
     }
 
-    private void addPSBTDecoration(Node target, String description, String styleClass) {
-        Decorator.addDecoration(target, new GraphicDecoration(new TextDecoration("PSBT", description, styleClass), Pos.TOP_RIGHT));
-    }
+    private void initializeStatusFields(TransactionInput txInput, PSBTInput psbtInput) {
+        updateSignatures(psbtInput);
 
-    private void initializeStatusFields(TransactionInput txInput) {
         Transaction transaction = inputForm.getTransaction();
-
-        updateSignatures();
-
         rbf.setSelected(txInput.isReplaceByFeeEnabled());
         rbf.selectedProperty().addListener((observable, oldValue, newValue) -> {
             if(newValue) {
@@ -323,11 +323,9 @@ public class InputController extends TransactionFormController implements Initia
         rbf.setDisable(!inputForm.isEditable());
     }
 
-    private void updateSignatures() {
+    private void updateSignatures(PSBTInput psbtInput) {
         signatures.setText("Unknown");
         if(inputForm.getPsbtInput() != null) {
-            PSBTInput psbtInput = inputForm.getPsbtInput();
-
             int reqSigs = -1;
             if(psbtInput.getUtxo() != null && psbtInput.getSigningScript() != null) {
                 try {
@@ -519,4 +517,13 @@ public class InputController extends TransactionFormController implements Initia
             locktimeRelativeCombo.setDisable(true);
         }
     }
+
+    @Subscribe
+    public void psbtCombined(PSBTCombinedEvent event) {
+        if(event.getPsbt().equals(inputForm.getPsbt())) {
+            updateSpends(inputForm.getPsbtInput().getUtxo());
+            updateScriptFields(inputForm.getTransactionInput(), inputForm.getPsbtInput());
+            updateSignatures(inputForm.getPsbtInput());
+        }
+    }
 }

src/main/java/com/sparrowwallet/sparrow/transaction/InputsController.java

@@ -11,6 +11,7 @@ import com.sparrowwallet.sparrow.control.CoinLabel;
 import com.sparrowwallet.sparrow.control.CopyableLabel;
 import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
 import com.sparrowwallet.sparrow.event.BlockTransactionFetchedEvent;
+import com.sparrowwallet.sparrow.event.PSBTCombinedEvent;
 import javafx.collections.ListChangeListener;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
@@ -106,7 +107,6 @@ public class InputsController extends TransactionFormController implements Initi
             signatures.setText(foundSigs + "/?");
         }
 
-
         addPieData(inputsPie, outputs);
     }
 
@@ -173,4 +173,11 @@ public class InputsController extends TransactionFormController implements Initi
     public void bitcoinUnitChanged(BitcoinUnitChangedEvent event) {
         total.refresh(event.getBitcoinUnit());
     }
+
+    @Subscribe
+    public void psbtCombined(PSBTCombinedEvent event) {
+        if(event.getPsbt().equals(inputsForm.getPsbt())) {
+            updatePSBTInputs(inputsForm.getPsbt());
+        }
+    }
 }

src/main/java/com/sparrowwallet/sparrow/transaction/OutputController.java

@@ -10,6 +10,7 @@ import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.AddressLabel;
 import com.sparrowwallet.sparrow.control.CoinLabel;
 import com.sparrowwallet.sparrow.control.CopyableLabel;
+import com.sparrowwallet.sparrow.control.ScriptArea;
 import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
 import com.sparrowwallet.sparrow.event.BlockTransactionOutputsFetchedEvent;
 import com.sparrowwallet.sparrow.event.ViewTransactionEvent;
@@ -54,7 +55,7 @@ public class OutputController extends TransactionFormController implements Initi
     private Hyperlink spentBy;
 
     @FXML
-    private CodeArea scriptPubKeyArea;
+    private ScriptArea scriptPubKeyArea;
 
     @Override
     public void initialize(URL location, ResourceBundle resources) {
@@ -92,8 +93,9 @@ public class OutputController extends TransactionFormController implements Initi
             spent.setText("Unknown");
         }
 
+        initializeScriptField(scriptPubKeyArea);
         scriptPubKeyArea.clear();
-        appendScript(scriptPubKeyArea, txOutput.getScript(), null, null);
+        scriptPubKeyArea.appendScript(txOutput.getScript(), null, null);
     }
 
     private void updateSpent(List<BlockTransaction> outputTransactions) {

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionController.java

@@ -368,6 +368,10 @@ public class TransactionController implements Initializable {
         this.txdata = new TransactionData(transaction);
     }
 
+    public void setName(String name) {
+        this.txdata.setName(name);
+    }
+
     public PSBT getPSBT() {
         return txdata.getPsbt();
     }

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionData.java

@@ -17,6 +17,7 @@ import java.util.Map;
 
 public class TransactionData {
     private final Transaction transaction;
+    private String name;
     private PSBT psbt;
     private BlockTransaction blockTransaction;
     private Map<Sha256Hash, BlockTransaction> inputTransactions;
@@ -49,6 +50,14 @@ public class TransactionData {
         return transaction;
     }
 
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
     public PSBT getPsbt() {
         return psbt;
     }

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionForm.java

@@ -27,6 +27,10 @@ public abstract class TransactionForm {
         return txdata.getTransaction();
     }
 
+    public String getName() {
+        return txdata.getName();
+    }
+
     public PSBT getPsbt() {
         return txdata.getPsbt();
     }

src/main/java/com/sparrowwallet/sparrow/wallet/ReceiveController.java

@@ -12,6 +12,7 @@ import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.CopyableLabel;
 import com.sparrowwallet.sparrow.control.CopyableTextField;
+import com.sparrowwallet.sparrow.control.ScriptArea;
 import com.sparrowwallet.sparrow.event.ReceiveToEvent;
 import com.sparrowwallet.sparrow.event.WalletHistoryChangedEvent;
 import com.sparrowwallet.sparrow.event.WalletNodesChangedEvent;
@@ -53,7 +54,7 @@ public class ReceiveController extends WalletFormController implements Initializ
     private ImageView qrCode;
 
     @FXML
-    private CodeArea scriptPubKeyArea;
+    private ScriptArea scriptPubKeyArea;
 
     @FXML
     private CodeArea outputDescriptor;
@@ -67,7 +68,7 @@ public class ReceiveController extends WalletFormController implements Initializ
 
     @Override
     public void initializeView() {
-
+        initializeScriptField(scriptPubKeyArea);
     }
 
     public void setNodeEntry(NodeEntry nodeEntry) {
@@ -88,7 +89,7 @@ public class ReceiveController extends WalletFormController implements Initializ
         }
 
         scriptPubKeyArea.clear();
-        appendScript(scriptPubKeyArea, nodeEntry.getOutputScript(), null, null);
+        scriptPubKeyArea.appendScript(nodeEntry.getOutputScript(), null, null);
 
         outputDescriptor.clear();
         outputDescriptor.appendText(nodeEntry.getOutputDescriptor());

src/main/java/com/sparrowwallet/sparrow/wallet/SendController.java

@@ -137,6 +137,7 @@ public class SendController extends WalletFormController implements Initializabl
             targetBlocks.setTooltip(tooltip);
 
             userFeeSet.set(false);
+            revalidate(amount, amountListener);
             updateTransaction();
         }
     };

src/main/resources/com/sparrowwallet/sparrow/transaction/headers.css

@@ -41,7 +41,7 @@
     -fx-padding: 10 20 10 20;
 }
 
-.signatures-buttons .button {
+.signatures-buttons .segmented-button, .signatures-buttons .button, .signatures-buttons .toggle-button {
     -fx-pref-height: 75px;
     -fx-max-width: Infinity;
 }

src/main/resources/com/sparrowwallet/sparrow/transaction/headers.fxml

@@ -171,16 +171,34 @@
             </VBox>
             <VBox>
                 <HBox styleClass="signatures-buttons" spacing="20">
-                    <Button HBox.hgrow="ALWAYS" text="Show QR" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#showPSBT">
+                    <SegmentedButton HBox.hgrow="ALWAYS">
+                        <buttons>
+                            <ToggleButton HBox.hgrow="ALWAYS" text="Show QR" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#showPSBT">
                                 <graphic>
                                     <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="20" icon="QRCODE" />
                                 </graphic>
-                    </Button>
-                    <Button HBox.hgrow="ALWAYS" text="Save PSBT" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#savePSBT">
+                            </ToggleButton>
+                            <ToggleButton HBox.hgrow="ALWAYS" text="Scan QR" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#scanPSBT">
+                                <graphic>
+                                    <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="20" icon="CAMERA" />
+                                </graphic>
+                            </ToggleButton>
+                        </buttons>
+                    </SegmentedButton>
+                    <SegmentedButton HBox.hgrow="ALWAYS">
+                        <buttons>
+                            <ToggleButton HBox.hgrow="ALWAYS" text="Save PSBT" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#savePSBT">
                                 <graphic>
                                     <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="20" icon="SD_CARD" />
                                 </graphic>
-                    </Button>
+                            </ToggleButton>
+                            <ToggleButton HBox.hgrow="ALWAYS" text="Load PSBT" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#loadPSBT">
+                                <graphic>
+                                    <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="20" icon="ARROW_UP" />
+                                </graphic>
+                            </ToggleButton>
+                        </buttons>
+                    </SegmentedButton>
                     <Button fx:id="signButton" defaultButton="true" HBox.hgrow="ALWAYS" text="Sign" contentDisplay="TOP" wrapText="true" textAlignment="CENTER" onAction="#signPSBT">
                         <graphic>
                             <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="20" icon="PEN_FANCY" />

src/main/resources/com/sparrowwallet/sparrow/transaction/input.fxml

@@ -16,6 +16,7 @@
 <?import com.sparrowwallet.sparrow.control.CoinLabel?>
 <?import com.sparrowwallet.sparrow.control.AddressLabel?>
 <?import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch?>
+<?import com.sparrowwallet.sparrow.control.ScriptArea?>
 
 <GridPane hgap="10.0" vgap="10.0" styleClass="tx-pane" stylesheets="@input.css, @transaction.css, @../script.css, @../general.css" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.transaction.InputController">
     <padding>
@@ -55,28 +56,28 @@
             <Field text="ScriptSig:">
                 <VirtualizedScrollPane>
                     <content>
-                        <CodeArea fx:id="scriptSigArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
+                        <ScriptArea fx:id="scriptSigArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
                     </content>
                 </VirtualizedScrollPane>
             </Field>
             <Field text="RedeemScript:">
                 <VirtualizedScrollPane fx:id="redeemScriptScroll">
                     <content>
-                        <CodeArea fx:id="redeemScriptArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
+                        <ScriptArea fx:id="redeemScriptArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
                     </content>
                 </VirtualizedScrollPane>
             </Field>
             <Field text="Witnesses:">
                 <VirtualizedScrollPane fx:id="witnessesScroll">
                     <content>
-                        <CodeArea fx:id="witnessesArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
+                        <ScriptArea fx:id="witnessesArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
                     </content>
                 </VirtualizedScrollPane>
             </Field>
             <Field text="WitnessScript:">
                 <VirtualizedScrollPane fx:id="witnessScriptScroll">
                     <content>
-                        <CodeArea fx:id="witnessScriptArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
+                        <ScriptArea fx:id="witnessScriptArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
                     </content>
                 </VirtualizedScrollPane>
             </Field>

src/main/resources/com/sparrowwallet/sparrow/transaction/output.fxml

@@ -14,6 +14,7 @@
 <?import com.sparrowwallet.sparrow.control.CopyableLabel?>
 <?import com.sparrowwallet.sparrow.control.CoinLabel?>
 <?import com.sparrowwallet.sparrow.control.AddressLabel?>
+<?import com.sparrowwallet.sparrow.control.ScriptArea?>
 
 <GridPane hgap="10.0" vgap="10.0" styleClass="tx-pane" stylesheets="@output.css, @transaction.css, @../script.css, @../general.css" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.transaction.OutputController">
     <padding>
@@ -50,7 +51,7 @@
             <Field text="ScriptPubKey:">
                 <VirtualizedScrollPane>
                     <content>
-                        <CodeArea fx:id="scriptPubKeyArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
+                        <ScriptArea fx:id="scriptPubKeyArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
                     </content>
                 </VirtualizedScrollPane>
             </Field>

src/main/resources/com/sparrowwallet/sparrow/wallet/receive.fxml

@@ -16,6 +16,7 @@
 <?import com.sparrowwallet.sparrow.control.CopyableLabel?>
 <?import org.controlsfx.glyphfont.Glyph?>
 <?import com.sparrowwallet.sparrow.control.CopyableTextField?>
+<?import com.sparrowwallet.sparrow.control.ScriptArea?>
 
 <BorderPane stylesheets="@receive.css, @wallet.css, @../script.css, @../general.css" styleClass="wallet-pane" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.wallet.ReceiveController">
     <center>
@@ -59,7 +60,7 @@
                     <Field text="ScriptPubKey">
                         <VirtualizedScrollPane>
                             <content>
-                                <CodeArea fx:id="scriptPubKeyArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
+                                <ScriptArea fx:id="scriptPubKeyArea" editable="false" wrapText="true" prefHeight="42" maxHeight="42" styleClass="uneditable-codearea" />
                             </content>
                         </VirtualizedScrollPane>
                     </Field>