add mix config persistence and initial usage

drongo

@@ -1 +1 @@
-Subproject commit 71b5778226ef22881240143425325525c1a98d06
+Subproject commit 67836b2b557839317316a3e1c8d18b98a51d0e29

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

@@ -899,6 +899,7 @@ public class AppController implements Initializable {
             if(wallet.isWhirlpoolMasterWallet()) {
                 String walletId = storage.getWalletId(wallet);
                 Whirlpool whirlpool = AppServices.get().getWhirlpool(walletId);
+                whirlpool.setScode(wallet.getOrCreateMixConfig().getScode());
                 whirlpool.setHDWallet(storage.getWalletId(wallet), copy);
             }
 

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

@@ -469,7 +469,7 @@ public class AppServices {
         Whirlpool whirlpool = whirlpoolMap.get(walletId);
         if(whirlpool == null) {
             HostAndPort torProxy = AppServices.isTorRunning() ? HostAndPort.fromParts("localhost", TorService.PROXY_PORT) : (Config.get().getProxyServer() == null || Config.get().getProxyServer().isEmpty() || !Config.get().isUseProxy() ? null : HostAndPort.fromString(Config.get().getProxyServer()));
-            whirlpool = new Whirlpool(Network.get(), torProxy, Config.get().getScode());
+            whirlpool = new Whirlpool(Network.get(), torProxy);
             whirlpoolMap.put(walletId, whirlpool);
         }
 
@@ -477,12 +477,15 @@ public class AppServices {
     }
 
     private void startAllWhirlpool() {
-        for(Whirlpool whirlpool : whirlpoolMap.values().stream().filter(whirlpool -> whirlpool.hasWallet() && !whirlpool.isStarted()).collect(Collectors.toList())) {
+        for(Map.Entry<String, Whirlpool> entry : whirlpoolMap.entrySet().stream().filter(entry -> entry.getValue().hasWallet() && !entry.getValue().isStarted()).collect(Collectors.toList())) {
-            Whirlpool.StartupService startupService = new Whirlpool.StartupService(whirlpool);
+            Wallet wallet = getWallet(entry.getKey());
-            startupService.setOnFailed(workerStateEvent -> {
+            if(wallet.getMixConfig() != null && wallet.getMixConfig().getMixOnStartup() != Boolean.FALSE) {
-                log.error("Failed to start whirlpool", workerStateEvent.getSource().getException());
+                Whirlpool.StartupService startupService = new Whirlpool.StartupService(entry.getValue());
-            });
+                startupService.setOnFailed(workerStateEvent -> {
-            startupService.start();
+                    log.error("Failed to start whirlpool", workerStateEvent.getSource().getException());
+                });
+                startupService.start();
+            }
         }
     }
 
@@ -974,7 +977,7 @@ public class AppServices {
     public void walletOpened(WalletOpenedEvent event) {
         String walletId = event.getStorage().getWalletId(event.getWallet());
         Whirlpool whirlpool = whirlpoolMap.get(walletId);
-        if(whirlpool != null && !whirlpool.isStarted() && isConnected()) {
+        if(whirlpool != null && !whirlpool.isStarted() && isConnected() && event.getWallet().getMixConfig() != null && event.getWallet().getMixConfig().getMixOnStartup() != Boolean.FALSE) {
             Whirlpool.StartupService startupService = new Whirlpool.StartupService(whirlpool);
             startupService.setOnFailed(workerStateEvent -> {
                 log.error("Failed to start whirlpool", workerStateEvent.getSource().getException());

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

@@ -0,0 +1,9 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+public class WalletMixConfigChangedEvent extends WalletChangedEvent {
+    public WalletMixConfigChangedEvent(Wallet wallet) {
+        super(wallet);
+    }
+}

src/main/java/com/sparrowwallet/sparrow/io/Config.java

@@ -61,7 +61,6 @@ public class Config {
     private String proxyServer;
     private Double appWidth;
     private Double appHeight;
-    private String scode;
 
     private static Config INSTANCE;
 
@@ -489,15 +488,6 @@ public class Config {
         flush();
     }
 
-    public String getScode() {
-        return scode;
-    }
-
-    public void setScode(String scode) {
-        this.scode = scode;
-        flush();
-    }
-
     private synchronized void flush() {
         Gson gson = getGson();
         try {

src/main/java/com/sparrowwallet/sparrow/io/db/DbPersistence.java

@@ -272,6 +272,11 @@ public class DbPersistence implements Persistence {
                     }
                 }
 
+                if(dirtyPersistables.mixConfig) {
+                    MixConfigDao mixConfigDao = handle.attach(MixConfigDao.class);
+                    mixConfigDao.addOrUpdate(wallet, wallet.getMixConfig());
+                }
+
                 if(!dirtyPersistables.changedUtxoMixes.isEmpty()) {
                     UtxoMixDataDao utxoMixDataDao = handle.attach(UtxoMixDataDao.class);
                     for(Map.Entry<Sha256Hash, UtxoMixData> utxoMixDataEntry : dirtyPersistables.changedUtxoMixes.entrySet()) {
@@ -652,6 +657,13 @@ public class DbPersistence implements Persistence {
         }
     }
 
+    @Subscribe
+    public void walletMixConfigChanged(WalletMixConfigChangedEvent event) {
+        if(persistsFor(event.getWallet()) && event.getWallet().getMixConfig() != null) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).mixConfig = true;
+        }
+    }
+
     @Subscribe
     public void walletUtxoMixesChanged(WalletUtxoMixesChangedEvent event) {
         if(persistsFor(event.getWallet())) {
@@ -680,6 +692,7 @@ public class DbPersistence implements Persistence {
         public Integer blockHeight = null;
         public final List<Entry> labelEntries = new ArrayList<>();
         public final List<BlockTransactionHashIndex> utxoStatuses = new ArrayList<>();
+        public boolean mixConfig;
         public final Map<Sha256Hash, UtxoMixData> changedUtxoMixes = new HashMap<>();
         public final Map<Sha256Hash, UtxoMixData> removedUtxoMixes = new HashMap<>();
         public final List<Keystore> labelKeystores = new ArrayList<>();
@@ -694,6 +707,7 @@ public class DbPersistence implements Persistence {
                     "\nAddress labels:" + labelEntries.stream().filter(entry -> entry instanceof NodeEntry).map(entry -> ((NodeEntry)entry).getNode().toString() + " " + entry.getLabel()).collect(Collectors.toList()) +
                     "\nUTXO labels:" + labelEntries.stream().filter(entry -> entry instanceof HashIndexEntry).map(entry -> ((HashIndexEntry)entry).getHashIndex().toString()).collect(Collectors.toList()) +
                     "\nUTXO statuses:" + utxoStatuses +
+                    "\nMix config:" + mixConfig +
                     "\nUTXO mixes changed:" + changedUtxoMixes +
                     "\nUTXO mixes removed:" + removedUtxoMixes +
                     "\nKeystore labels:" + labelKeystores.stream().map(Keystore::getLabel).collect(Collectors.toList()) +

src/main/java/com/sparrowwallet/sparrow/io/db/MixConfigDao.java

@@ -0,0 +1,41 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.wallet.MixConfig;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import org.jdbi.v3.sqlobject.config.RegisterRowMapper;
+import org.jdbi.v3.sqlobject.statement.GetGeneratedKeys;
+import org.jdbi.v3.sqlobject.statement.SqlQuery;
+import org.jdbi.v3.sqlobject.statement.SqlUpdate;
+
+public interface MixConfigDao {
+    @SqlQuery("select id, scode, mixOnStartup, mixToWalletFile, mixToWalletName, minMixes from mixConfig where wallet = ?")
+    @RegisterRowMapper(MixConfigMapper.class)
+    MixConfig getForWalletId(Long id);
+
+    @SqlUpdate("insert into mixConfig (scode, mixOnStartup, mixToWalletFile, mixToWalletName, minMixes, wallet) values (?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insertMixConfig(String scode, Boolean mixOnStartup, String mixToWalletFile, String mixToWalletName, Integer minMixes, long wallet);
+
+    @SqlUpdate("update mixConfig set scode = ?, mixOnStartup = ?, mixToWalletFile = ?, mixToWalletName = ?, minMixes = ?, wallet = ? where id = ?")
+    void updateMixConfig(String scode, Boolean mixOnStartup, String mixToWalletFile, String mixToWalletName, Integer minMixes, long wallet, long id);
+
+    default void addMixConfig(Wallet wallet) {
+        if(wallet.getMixConfig() != null) {
+            addOrUpdate(wallet, wallet.getMixConfig());
+        }
+    }
+
+    default void addOrUpdate(Wallet wallet, MixConfig mixConfig) {
+        String mixToWalletFile = null;
+        if(mixConfig.getMixToWalletFile() != null) {
+            mixToWalletFile = mixConfig.getMixToWalletFile().getAbsolutePath();
+        }
+
+        if(mixConfig.getId() == null) {
+            long id = insertMixConfig(mixConfig.getScode(), mixConfig.getMixOnStartup(), mixToWalletFile, mixConfig.getMixToWalletName(), mixConfig.getMinMixes(), wallet.getId());
+            mixConfig.setId(id);
+        } else {
+            updateMixConfig(mixConfig.getScode(), mixConfig.getMixOnStartup(), mixToWalletFile, mixConfig.getMixToWalletName(), mixConfig.getMinMixes(), wallet.getId(), mixConfig.getId());
+        }
+    }
+}

src/main/java/com/sparrowwallet/sparrow/io/db/MixConfigMapper.java

@@ -0,0 +1,33 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.wallet.MixConfig;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.io.File;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class MixConfigMapper implements RowMapper<MixConfig> {
+    @Override
+    public MixConfig map(ResultSet rs, StatementContext ctx) throws SQLException {
+        String scode = rs.getString("scode");
+
+        Boolean mixOnStartup = rs.getBoolean("mixOnStartup");
+        if(rs.wasNull()) {
+            mixOnStartup = null;
+        }
+
+        String mixToWalletFile = rs.getString("mixToWalletFile");
+        String mixToWalletName = rs.getString("mixToWalletName");
+
+        Integer minMixes = rs.getInt("minMixes");
+        if(rs.wasNull()) {
+            minMixes = null;
+        }
+
+        MixConfig mixConfig = new MixConfig(scode, mixOnStartup, mixToWalletFile == null ? null : new File(mixToWalletFile), mixToWalletName, minMixes);
+        mixConfig.setId(rs.getLong("id"));
+        return mixConfig;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/io/db/WalletDao.java

@@ -30,6 +30,9 @@ public interface WalletDao {
     @CreateSqlObject
     BlockTransactionDao createBlockTransactionDao();
 
+    @CreateSqlObject
+    MixConfigDao createMixConfigDao();
+
     @CreateSqlObject
     UtxoMixDataDao createUtxoMixDataDao();
 
@@ -91,6 +94,8 @@ public interface WalletDao {
         Map<Sha256Hash, BlockTransaction> blockTransactions = createBlockTransactionDao().getForWalletId(wallet.getId()); //.stream().collect(Collectors.toMap(BlockTransaction::getHash, Function.identity(), (existing, replacement) -> existing, LinkedHashMap::new));
         wallet.updateTransactions(blockTransactions);
 
+        wallet.setMixConfig(createMixConfigDao().getForWalletId(wallet.getId()));
+
         Map<Sha256Hash, UtxoMixData> utxoMixes = createUtxoMixDataDao().getForWalletId(wallet.getId());
         wallet.getUtxoMixes().putAll(utxoMixes);
     }
@@ -106,6 +111,7 @@ public interface WalletDao {
             createKeystoreDao().addKeystores(wallet);
             createWalletNodeDao().addWalletNodes(wallet);
             createBlockTransactionDao().addBlockTransactions(wallet);
+            createMixConfigDao().addMixConfig(wallet);
             createUtxoMixDataDao().addUtxoMixData(wallet);
         } finally {
             setSchema(DbPersistence.DEFAULT_SCHEMA);

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

@@ -1110,7 +1110,8 @@ public class SendController extends WalletFormController implements Initializabl
 
     public void broadcastPremix(ActionEvent event) {
         //Ensure all child wallets have been saved
-        for(Wallet childWallet : getWalletForm().getWallet().getChildWallets()) {
+        Wallet masterWallet = getWalletForm().getWallet().isMasterWallet() ? getWalletForm().getWallet() : getWalletForm().getWallet().getMasterWallet();
+        for(Wallet childWallet : masterWallet.getChildWallets()) {
             Storage storage = AppServices.get().getOpenWallets().get(childWallet);
             if(!storage.isPersisted(childWallet)) {
                 try {
@@ -1122,7 +1123,7 @@ public class SendController extends WalletFormController implements Initializabl
         }
 
         //The WhirlpoolWallet has already been configured for the tx0 preview
-        Whirlpool whirlpool = AppServices.get().getWhirlpool(getWalletForm().getWalletId());
+        Whirlpool whirlpool = AppServices.get().getWhirlpool(getWalletForm().getStorage().getWalletId(masterWallet));
         Map<BlockTransactionHashIndex, WalletNode> utxos = walletTransactionProperty.get().getSelectedUtxos();
         Whirlpool.Tx0BroadcastService tx0BroadcastService = new Whirlpool.Tx0BroadcastService(whirlpool, whirlpoolProperty.get(), utxos.keySet());
         tx0BroadcastService.setOnRunning(workerStateEvent -> {

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

@@ -170,7 +170,7 @@ public class UtxosController extends WalletFormController implements Initializab
         Wallet wallet = getWalletForm().getWallet();
         String walletId = walletForm.getWalletId();
 
-        if(!wallet.isWhirlpoolMasterWallet() && wallet.isEncrypted()) {
+        if(wallet.isMasterWallet() && !wallet.isWhirlpoolMasterWallet() && wallet.isEncrypted()) {
             WalletPasswordDialog dlg = new WalletPasswordDialog(wallet.getMasterName(), WalletPasswordDialog.PasswordRequirement.LOAD);
             Optional<SecureString> password = dlg.showAndWait();
             if(password.isPresent()) {
@@ -205,7 +205,7 @@ public class UtxosController extends WalletFormController implements Initializab
                 keyDerivationService.start();
             }
         } else {
-            if(!wallet.isWhirlpoolMasterWallet()) {
+            if(wallet.isMasterWallet() && !wallet.isWhirlpoolMasterWallet()) {
                 prepareWhirlpoolWallet(wallet);
             }
 
@@ -215,7 +215,7 @@ public class UtxosController extends WalletFormController implements Initializab
 
     private void prepareWhirlpoolWallet(Wallet decryptedWallet) {
         Whirlpool whirlpool = AppServices.get().getWhirlpool(getWalletForm().getWalletId());
-        whirlpool.setScode(Config.get().getScode());
+        whirlpool.setScode(decryptedWallet.getOrCreateMixConfig().getScode());
         whirlpool.setHDWallet(getWalletForm().getWalletId(), decryptedWallet);
 
         for(StandardAccount whirlpoolAccount : StandardAccount.WHIRLPOOL_ACCOUNTS) {
@@ -227,8 +227,10 @@ public class UtxosController extends WalletFormController implements Initializab
     }
 
     private void previewPremix(Wallet wallet, Tx0Preview tx0Preview, List<UtxoEntry> utxoEntries) {
-        Wallet premixWallet = wallet.getChildWallet(StandardAccount.WHIRLPOOL_PREMIX);
+        Wallet masterWallet = wallet.isMasterWallet() ? wallet : wallet.getMasterWallet();
-        Wallet badbankWallet = wallet.getChildWallet(StandardAccount.WHIRLPOOL_BADBANK);
+
+        Wallet premixWallet = masterWallet.getChildWallet(StandardAccount.WHIRLPOOL_PREMIX);
+        Wallet badbankWallet = masterWallet.getChildWallet(StandardAccount.WHIRLPOOL_BADBANK);
 
         List<Payment> payments = new ArrayList<>();
         try {
@@ -284,6 +286,10 @@ public class UtxosController extends WalletFormController implements Initializab
             });
             startupService.start();
         }
+
+        Wallet masterWallet = getWalletForm().getWallet().isMasterWallet() ? getWalletForm().getWallet() : getWalletForm().getWallet().getMasterWallet();
+        masterWallet.getOrCreateMixConfig().setMixOnStartup(Boolean.TRUE);
+        EventManager.get().post(new WalletMixConfigChangedEvent(masterWallet));
     }
 
     public void stopMixing(ActionEvent event) {
@@ -302,6 +308,10 @@ public class UtxosController extends WalletFormController implements Initializab
             //Ensure http clients are shutdown
             whirlpool.shutdown();
         }
+
+        Wallet masterWallet = getWalletForm().getWallet().isMasterWallet() ? getWalletForm().getWallet() : getWalletForm().getWallet().getMasterWallet();
+        masterWallet.getOrCreateMixConfig().setMixOnStartup(Boolean.FALSE);
+        EventManager.get().post(new WalletMixConfigChangedEvent(masterWallet));
     }
 
     public void exportUtxos(ActionEvent event) {

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

@@ -469,6 +469,13 @@ public class WalletForm {
         }
     }
 
+    @Subscribe
+    public void walletMixConfigChanged(WalletMixConfigChangedEvent event) {
+        if(event.getWallet() == wallet) {
+            Platform.runLater(() -> EventManager.get().post(new WalletDataChangedEvent(wallet)));
+        }
+    }
+
     @Subscribe
     public void walletUtxoMixesChanged(WalletUtxoMixesChangedEvent event) {
         if(event.getWallet() == wallet) {

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

@@ -69,7 +69,7 @@ public class Whirlpool {
 
     private final BooleanProperty mixingProperty = new SimpleBooleanProperty(false);
 
-    public Whirlpool(Network network, HostAndPort torProxy, String sCode) {
+    public Whirlpool(Network network, HostAndPort torProxy) {
         this.torProxy = torProxy;
         this.whirlpoolServer = WhirlpoolServer.valueOf(network.getName().toUpperCase());
         this.httpClientService = new JavaHttpClientService(torProxy);
@@ -77,12 +77,12 @@ public class Whirlpool {
         this.torClientService = new WhirlpoolTorClientService();
 
         this.whirlpoolWalletService = new WhirlpoolWalletService();
-        this.config = computeWhirlpoolWalletConfig(sCode);
+        this.config = computeWhirlpoolWalletConfig();
 
         WhirlpoolEventService.getInstance().register(this);
     }
 
-    private WhirlpoolWalletConfig computeWhirlpoolWalletConfig(String sCode) {
+    private WhirlpoolWalletConfig computeWhirlpoolWalletConfig() {
         DataPersisterFactory dataPersisterFactory = (whirlpoolWallet, bip44w) -> new SparrowDataPersister(whirlpoolWallet);
         DataSourceFactory dataSourceFactory = (whirlpoolWallet, bip44w, dataPersister) -> new SparrowDataSource(whirlpoolWallet, bip44w, dataPersister);
 
@@ -92,7 +92,6 @@ public class Whirlpool {
 
         WhirlpoolWalletConfig whirlpoolWalletConfig = new WhirlpoolWalletConfig(dataSourceFactory, httpClientService, stompClientService, torClientService, serverApi, whirlpoolServer.getParams(), false);
         whirlpoolWalletConfig.setDataPersisterFactory(dataPersisterFactory);
-        whirlpoolWalletConfig.setScode(sCode);
 
         return whirlpoolWalletConfig;
     }
@@ -343,6 +342,14 @@ public class Whirlpool {
         config.setScode(scode);
     }
 
+    public void setExternalDestination(ExternalDestination externalDestination) {
+        if(whirlpoolWalletService.whirlpoolWallet() != null) {
+            throw new IllegalStateException("Cannot set external destination while WhirlpoolWallet is running");
+        }
+
+        config.setExternalDestination(externalDestination);
+    }
+
     public boolean isMixing() {
         return mixingProperty.get();
     }

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

@@ -4,9 +4,12 @@ import com.samourai.whirlpool.client.tx0.Tx0Preview;
 import com.samourai.whirlpool.client.whirlpool.beans.Pool;
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.drongo.protocol.Transaction;
+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.control.CoinLabel;
+import com.sparrowwallet.sparrow.event.WalletMixConfigChangedEvent;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.wallet.Entry;
 import com.sparrowwallet.sparrow.wallet.UtxoEntry;
@@ -72,6 +75,7 @@ public class WhirlpoolController {
 
     private String walletId;
     private Wallet wallet;
+    private MixConfig mixConfig;
     private List<UtxoEntry> utxoEntries;
     private final ObjectProperty<Tx0Preview> tx0PreviewProperty = new SimpleObjectProperty<>(null);
 
@@ -79,6 +83,7 @@ public class WhirlpoolController {
         this.walletId = walletId;
         this.wallet = wallet;
         this.utxoEntries = utxoEntries;
+        this.mixConfig = wallet.isMasterWallet() ? wallet.getOrCreateMixConfig() : wallet.getMasterWallet().getOrCreateMixConfig();
 
         step1.managedProperty().bind(step1.visibleProperty());
         step2.managedProperty().bind(step2.visibleProperty());
@@ -89,12 +94,13 @@ public class WhirlpoolController {
         step3.setVisible(false);
         step4.setVisible(false);
 
-        scode.setText(Config.get().getScode() == null ? "" : Config.get().getScode());
+        scode.setText(mixConfig.getScode() == null ? "" : mixConfig.getScode());
         scode.textProperty().addListener((observable, oldValue, newValue) -> {
-            Config.get().setScode(newValue);
+            mixConfig.setScode(newValue);
+            EventManager.get().post(new WalletMixConfigChangedEvent(wallet.isMasterWallet() ? wallet : wallet.getMasterWallet()));
         });
 
-        if(Config.get().getScode() != null) {
+        if(mixConfig.getScode() != null) {
             step1.setVisible(false);
             step3.setVisible(true);
         }
@@ -193,7 +199,7 @@ public class WhirlpoolController {
             List<Pool> availablePools = poolsService.getValue().stream().filter(pool1 -> totalUtxoValue >= (pool1.getPremixValueMin() + pool1.getFeeValue())).toList();
             if(availablePools.isEmpty()) {
                 pool.setVisible(false);
-                OptionalLong optMinValue = poolsService.getValue().stream().mapToLong(Pool::getMustMixBalanceMin).min();
+                OptionalLong optMinValue = poolsService.getValue().stream().mapToLong(pool1 -> pool1.getPremixValueMin() + pool1.getFeeValue()).min();
                 if(optMinValue.isPresent()) {
                     String satsValue = String.format(Locale.ENGLISH, "%,d", optMinValue.getAsLong()) + " sats";
                     String btcValue = CoinLabel.BTC_FORMAT.format((double)optMinValue.getAsLong() / Transaction.SATOSHIS_PER_BITCOIN) + " BTC";
@@ -224,17 +230,20 @@ public class WhirlpoolController {
     }
 
     private void fetchTx0Preview(Pool pool) {
-        if(Config.get().getScode() == null) {
+        if(mixConfig.getScode() == null) {
-            Config.get().setScode("");
+            mixConfig.setScode("");
+            EventManager.get().post(new WalletMixConfigChangedEvent(wallet.isMasterWallet() ? wallet : wallet.getMasterWallet()));
         }
 
         Whirlpool whirlpool = AppServices.get().getWhirlpool(walletId);
-        whirlpool.setScode(Config.get().getScode());
+        whirlpool.setScode(mixConfig.getScode());
 
         Whirlpool.Tx0PreviewService tx0PreviewService = new Whirlpool.Tx0PreviewService(whirlpool, wallet, pool, utxoEntries);
         tx0PreviewService.setOnRunning(workerStateEvent -> {
             nbOutputsBox.setVisible(true);
             nbOutputsLoading.setText("Calculating...");
+            nbOutputs.setVisible(false);
+            discountFeeBox.setVisible(false);
         });
         tx0PreviewService.setOnSucceeded(workerStateEvent -> {
             Tx0Preview tx0Preview = tx0PreviewService.getValue();

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

@@ -54,7 +54,8 @@ public class WhirlpoolDialog extends Dialog<Tx0Preview> {
             backButton.managedProperty().bind(backButton.visibleProperty());
             previewButton.managedProperty().bind(previewButton.visibleProperty());
 
-            if(Config.get().getScode() == null) {
+            Wallet masterWallet = wallet.isMasterWallet() ? wallet : wallet.getMasterWallet();
+            if(masterWallet.getOrCreateMixConfig().getScode() == null) {
                 backButton.setDisable(true);
             }
             previewButton.visibleProperty().bind(nextButton.visibleProperty().not());

src/main/resources/com/sparrowwallet/sparrow/sql/V2__Whirlpool.sql

@@ -1 +1,2 @@
+create table mixConfig (id identity not null, scode varchar(255), mixOnStartup boolean, mixToWalletFile varchar(1024), mixToWalletName varchar(255), minMixes integer, wallet bigint not null);
 create table utxoMixData (id identity not null, hash binary(32) not null, mixesDone integer not null default 0, expired bigint, wallet bigint not null);