use cached tx0previews, only save mixconfig on apply

build.gradle

@@ -91,7 +91,7 @@ dependencies {
     implementation('org.slf4j:jul-to-slf4j:1.7.30') {
         exclude group: 'org.slf4j'
     }
-    implementation('com.sparrowwallet.nightjar:nightjar:0.2.16-SNAPSHOT')
+    implementation('com.sparrowwallet.nightjar:nightjar:0.2.17-SNAPSHOT')
     testImplementation('junit:junit:4.12')
 }
 
@@ -449,7 +449,7 @@ extraJavaModuleInfo {
     module('cbor-0.9.jar', 'co.nstant.in.cbor', '0.9') {
         exports('co.nstant.in.cbor')
     }
-    module('nightjar-0.2.16-SNAPSHOT.jar', 'com.sparrowwallet.nightjar', '0.2.16-SNAPSHOT') {
+    module('nightjar-0.2.17-SNAPSHOT.jar', 'com.sparrowwallet.nightjar', '0.2.17-SNAPSHOT') {
         requires('com.google.common')
         requires('net.sourceforge.streamsupport')
         requires('org.slf4j')

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

@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+public class MixToConfigChangedEvent {
+    private final Wallet wallet;
+
+    public MixToConfigChangedEvent(Wallet wallet) {
+        this.wallet = wallet;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+}

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

@@ -1,12 +1,11 @@
 package com.sparrowwallet.sparrow.wallet;
 
-import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.wallet.MixConfig;
 import com.sparrowwallet.drongo.wallet.StandardAccount;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.EventManager;
-import com.sparrowwallet.sparrow.event.WalletMasterMixConfigChangedEvent;
+import com.sparrowwallet.sparrow.event.MixToConfigChangedEvent;
 import com.sparrowwallet.sparrow.whirlpool.Whirlpool;
 import javafx.collections.FXCollections;
 import javafx.fxml.FXML;
@@ -31,13 +30,15 @@ public class MixToController implements Initializable {
     @FXML
     private Spinner<Integer> minMixes;
 
+    private MixConfig mixConfig;
+
     @Override
     public void initialize(URL location, ResourceBundle resources) {
 
     }
 
     public void initializeView(Wallet wallet) {
-        MixConfig mixConfig = wallet.getMasterMixConfig();
+        mixConfig = wallet.getMasterMixConfig().copy();
 
         List<Wallet> allWallets = new ArrayList<>();
         allWallets.add(NONE_WALLET);
@@ -71,14 +72,18 @@ public class MixToController implements Initializable {
                 mixConfig.setMixToWalletFile(AppServices.get().getOpenWallets().get(newValue).getWalletFile());
             }
 
-            EventManager.get().post(new WalletMasterMixConfigChangedEvent(wallet));
+            EventManager.get().post(new MixToConfigChangedEvent(wallet));
         });
 
         int initialMinMixes = mixConfig.getMinMixes() == null ? Whirlpool.DEFAULT_MIXTO_MIN_MIXES : mixConfig.getMinMixes();
         minMixes.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(1, 10000, initialMinMixes));
         minMixes.valueProperty().addListener((observable, oldValue, newValue) -> {
             mixConfig.setMinMixes(newValue);
-            EventManager.get().post(new WalletMasterMixConfigChangedEvent(wallet));
+            EventManager.get().post(new MixToConfigChangedEvent(wallet));
         });
     }
+
+    public MixConfig getMixConfig() {
+        return mixConfig;
+    }
 }

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

@@ -1,10 +1,11 @@
 package com.sparrowwallet.sparrow.wallet;
 
 import com.google.common.eventbus.Subscribe;
+import com.sparrowwallet.drongo.wallet.MixConfig;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.EventManager;
-import com.sparrowwallet.sparrow.event.WalletMixConfigChangedEvent;
+import com.sparrowwallet.sparrow.event.MixToConfigChangedEvent;
 import com.sparrowwallet.sparrow.whirlpool.Whirlpool;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.control.*;
@@ -13,7 +14,7 @@ import org.controlsfx.tools.Borders;
 import java.io.IOException;
 import java.util.NoSuchElementException;
 
-public class MixToDialog extends Dialog<Boolean> {
+public class MixToDialog extends Dialog<MixConfig> {
     private final Wallet wallet;
     private final Button applyButton;
 
@@ -47,7 +48,7 @@ public class MixToDialog extends Dialog<Boolean> {
             dialogPane.setPrefHeight(300);
             AppServices.moveToActiveWindowScreen(this);
 
-            setResultConverter(dialogButton -> dialogButton == applyButtonType);
+            setResultConverter(dialogButton -> dialogButton == applyButtonType ? mixToController.getMixConfig() : null);
 
             setOnCloseRequest(event -> {
                 EventManager.get().unregister(this);
@@ -60,8 +61,8 @@ public class MixToDialog extends Dialog<Boolean> {
     }
 
     @Subscribe
-    public void walletMixConfigChanged(WalletMixConfigChangedEvent event) {
+    public void mixToConfigChanged(MixToConfigChangedEvent event) {
-        if(event.getWallet() == (wallet.isMasterWallet() ? wallet : wallet.getMasterWallet())) {
+        if(event.getWallet() == wallet) {
             applyButton.setDisable(false);
         }
     }

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

@@ -101,7 +101,7 @@ public class UtxosController extends WalletFormController implements Initializab
         startMix.visibleProperty().bind(stopMix.visibleProperty().not());
         stopMix.visibleProperty().addListener((observable, oldValue, newValue) -> {
             stopMix.setDisable(!newValue);
-            startMix.setDisable(newValue);
+            startMix.setDisable(newValue || !AppServices.onlineProperty().get());
         });
         mixTo.managedProperty().bind(mixTo.visibleProperty());
         mixTo.setVisible(getWalletForm().getWallet().getStandardAccountType() == StandardAccount.WHIRLPOOL_POSTMIX);
@@ -338,11 +338,17 @@ public class UtxosController extends WalletFormController implements Initializab
 
     public void showMixToDialog(ActionEvent event) {
         MixToDialog mixToDialog = new MixToDialog(getWalletForm().getWallet());
-        Optional<Boolean> optApply = mixToDialog.showAndWait();
+        Optional<MixConfig> optMixConfig = mixToDialog.showAndWait();
-        if(optApply.isPresent() && optApply.get()) {
+        if(optMixConfig.isPresent()) {
-            Whirlpool whirlpool = AppServices.getWhirlpoolServices().getWhirlpool(getWalletForm().getWallet());
+            MixConfig changedMixConfig = optMixConfig.get();
             MixConfig mixConfig = getWalletForm().getWallet().getMasterMixConfig();
 
+            mixConfig.setMixToWalletName(changedMixConfig.getMixToWalletName());
+            mixConfig.setMixToWalletFile(changedMixConfig.getMixToWalletFile());
+            mixConfig.setMinMixes(changedMixConfig.getMinMixes());
+            EventManager.get().post(new WalletMasterMixConfigChangedEvent(getWalletForm().getWallet()));
+
+            Whirlpool whirlpool = AppServices.getWhirlpoolServices().getWhirlpool(getWalletForm().getWallet());
             try {
                 String mixToWalletId = AppServices.getWhirlpoolServices().getWhirlpoolMixToWalletId(mixConfig);
                 whirlpool.setMixToWallet(mixToWalletId, mixConfig.getMinMixes());

src/main/java/com/sparrowwallet/sparrow/whirlpool/Whirlpool.java

@@ -112,14 +112,10 @@ public class Whirlpool {
         return poolSupplier.getPools();
     }
 
-    public Tx0Preview getTx0Preview(Pool pool, Collection<UnspentOutput> utxos) throws Exception {
+    public Tx0Previews getTx0Previews(Collection<UnspentOutput> utxos) throws Exception {
         // preview all pools
         Tx0Config tx0Config = computeTx0Config();
-        Tx0Previews tx0Previews = tx0Service.tx0Previews(utxos, tx0Config);
+        return tx0Service.tx0Previews(utxos, tx0Config);
-
-        // pool preview
-        String poolId = pool.getPoolId();
-        return tx0Previews.getTx0Preview(poolId);
     }
 
     public Tx0 broadcastTx0(Pool pool, Collection<BlockTransactionHashIndex> utxos) throws Exception {
@@ -477,28 +473,26 @@ public class Whirlpool {
         }
     }
 
-    public static class Tx0PreviewService extends Service<Tx0Preview> {
+    public static class Tx0PreviewsService extends Service<Tx0Previews> {
         private final Whirlpool whirlpool;
         private final Wallet wallet;
-        private final Pool pool;
         private final List<UtxoEntry> utxoEntries;
 
-        public Tx0PreviewService(Whirlpool whirlpool, Wallet wallet, Pool pool, List<UtxoEntry> utxoEntries) {
+        public Tx0PreviewsService(Whirlpool whirlpool, Wallet wallet, List<UtxoEntry> utxoEntries) {
             this.whirlpool = whirlpool;
             this.wallet = wallet;
-            this.pool = pool;
             this.utxoEntries = utxoEntries;
         }
 
         @Override
-        protected Task<Tx0Preview> createTask() {
+        protected Task<Tx0Previews> createTask() {
             return new Task<>() {
-                protected Tx0Preview call() throws Exception {
+                protected Tx0Previews call() throws Exception {
                     updateProgress(-1, 1);
-                    updateMessage("Fetching premix transaction...");
+                    updateMessage("Fetching premix preview...");
 
                     Collection<UnspentOutput> utxos = utxoEntries.stream().map(utxoEntry -> Whirlpool.getUnspentOutput(wallet, utxoEntry.getNode(), utxoEntry.getBlockTransaction(), (int)utxoEntry.getHashIndex().getIndex())).collect(Collectors.toList());
-                    return whirlpool.getTx0Preview(pool, utxos);
+                    return whirlpool.getTx0Previews(utxos);
                 }
             };
         }

src/main/java/com/sparrowwallet/sparrow/whirlpool/WhirlpoolController.java

@@ -1,6 +1,7 @@
 package com.sparrowwallet.sparrow.whirlpool;
 
 import com.samourai.whirlpool.client.tx0.Tx0Preview;
+import com.samourai.whirlpool.client.tx0.Tx0Previews;
 import com.samourai.whirlpool.client.whirlpool.beans.Pool;
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.drongo.protocol.Transaction;
@@ -77,6 +78,7 @@ public class WhirlpoolController {
     private Wallet wallet;
     private MixConfig mixConfig;
     private List<UtxoEntry> utxoEntries;
+    private Tx0Previews tx0Previews;
     private final ObjectProperty<Tx0Preview> tx0PreviewProperty = new SimpleObjectProperty<>(null);
 
     public void initializeView(String walletId, Wallet wallet, List<UtxoEntry> utxoEntries) {
@@ -100,6 +102,8 @@ public class WhirlpoolController {
             return change;
         }));
         scode.textProperty().addListener((observable, oldValue, newValue) -> {
+            pool.setItems(FXCollections.emptyObservableList());
+            tx0PreviewProperty.set(null);
             mixConfig.setScode(newValue);
             EventManager.get().post(new WalletMasterMixConfigChangedEvent(wallet));
         });
@@ -151,6 +155,21 @@ public class WhirlpoolController {
         nbOutputs.managedProperty().bind(nbOutputs.visibleProperty());
         nbOutputsLoading.visibleProperty().bind(nbOutputs.visibleProperty().not());
         nbOutputs.setVisible(false);
+
+        tx0PreviewProperty.addListener((observable, oldValue, tx0Preview) -> {
+            if(tx0Preview == null) {
+                nbOutputsBox.setVisible(true);
+                nbOutputsLoading.setText("Calculating...");
+                nbOutputs.setVisible(false);
+                discountFeeBox.setVisible(false);
+            } else {
+                discountFeeBox.setVisible(tx0Preview.getPool().getFeeValue() != tx0Preview.getTx0Data().getFeeValue());
+                discountFee.setValue(tx0Preview.getTx0Data().getFeeValue());
+                nbOutputsBox.setVisible(true);
+                nbOutputs.setText(tx0Preview.getNbPremix() + " UTXOs");
+                nbOutputs.setVisible(true);
+            }
+        });
     }
 
     public boolean next() {
@@ -240,26 +259,27 @@ public class WhirlpoolController {
         }
 
         Whirlpool whirlpool = AppServices.getWhirlpoolServices().getWhirlpool(walletId);
+        if(tx0Previews != null && mixConfig.getScode().equals(whirlpool.getScode())) {
+            Tx0Preview tx0Preview = tx0Previews.getTx0Preview(pool.getPoolId());
+            tx0PreviewProperty.set(tx0Preview);
+        } else {
+            tx0Previews = null;
             whirlpool.setScode(mixConfig.getScode());
 
-        Whirlpool.Tx0PreviewService tx0PreviewService = new Whirlpool.Tx0PreviewService(whirlpool, wallet, pool, utxoEntries);
+            Whirlpool.Tx0PreviewsService tx0PreviewsService = new Whirlpool.Tx0PreviewsService(whirlpool, wallet, utxoEntries);
-        tx0PreviewService.setOnRunning(workerStateEvent -> {
+            tx0PreviewsService.setOnRunning(workerStateEvent -> {
                 nbOutputsBox.setVisible(true);
                 nbOutputsLoading.setText("Calculating...");
                 nbOutputs.setVisible(false);
                 discountFeeBox.setVisible(false);
                 tx0PreviewProperty.set(null);
             });
-        tx0PreviewService.setOnSucceeded(workerStateEvent -> {
+            tx0PreviewsService.setOnSucceeded(workerStateEvent -> {
-            Tx0Preview tx0Preview = tx0PreviewService.getValue();
+                tx0Previews = tx0PreviewsService.getValue();
-            discountFeeBox.setVisible(tx0Preview.getPool().getFeeValue() != tx0Preview.getTx0Data().getFeeValue());
+                Tx0Preview tx0Preview = tx0Previews.getTx0Preview(pool.getPoolId());
-            discountFee.setValue(tx0Preview.getTx0Data().getFeeValue());
-            nbOutputsBox.setVisible(true);
-            nbOutputs.setText(tx0Preview.getNbPremix() + " UTXOs");
-            nbOutputs.setVisible(true);
                 tx0PreviewProperty.set(tx0Preview);
             });
-        tx0PreviewService.setOnFailed(workerStateEvent -> {
+            tx0PreviewsService.setOnFailed(workerStateEvent -> {
                 Throwable exception = workerStateEvent.getSource().getException();
                 while(exception.getCause() != null) {
                     exception = exception.getCause();
@@ -267,7 +287,8 @@ public class WhirlpoolController {
 
                 nbOutputsLoading.setText("Error fetching fee: " + exception.getMessage());
             });
-        tx0PreviewService.start();
+            tx0PreviewsService.start();
+        }
     }
 
     public ObjectProperty<Tx0Preview> getTx0PreviewProperty() {