sync blockchain depending on last used local node

core/src/main/java/haveno/core/api/CoreApi.java

@@ -260,11 +260,11 @@ public class CoreApi {
     }
 
     public void startXmrNode(XmrNodeSettings settings) throws IOException {
-        xmrLocalNode.startNode(settings);
+        xmrLocalNode.start(settings);
     }
 
     public void stopXmrNode() {
-        xmrLocalNode.stopNode();
+        xmrLocalNode.stop();
     }
 
     ///////////////////////////////////////////////////////////////////////////////////////////

core/src/main/java/haveno/core/api/XmrConnectionService.java

@@ -623,7 +623,7 @@ public final class XmrConnectionService {
         if (connectionManager.getConnection() != null && xmrLocalNode.equalsUri(connectionManager.getConnection().getUri()) && !xmrLocalNode.isDetected() && !xmrLocalNode.shouldBeIgnored()) {
             try {
                 log.info("Starting local node");
-                xmrLocalNode.startMoneroNode();
+                xmrLocalNode.start();
             } catch (Exception e) {
                 log.error("Unable to start local monero node, error={}\n", e.getMessage(), e);
             }
@@ -736,6 +736,12 @@ public final class XmrConnectionService {
                 // connected to daemon
                 isConnected = true;
 
+                // determine if blockchain is syncing locally
+                boolean blockchainSyncing = lastInfo.getHeight().equals(lastInfo.getHeightWithoutBootstrap()) || (lastInfo.getTargetHeight().equals(0l) && lastInfo.getHeightWithoutBootstrap().equals(0l)); // blockchain is syncing if height equals height without bootstrap, or target height and height without bootstrap both equal 0
+
+                // write sync status to preferences
+                preferences.getXmrNodeSettings().setSyncBlockchain(blockchainSyncing);
+
                 // throttle warnings if daemon not synced
                 if (!isSyncedWithinTolerance() && System.currentTimeMillis() - lastLogDaemonNotSyncedTimestamp > HavenoUtils.LOG_DAEMON_NOT_SYNCED_WARN_PERIOD_MS) {
                     log.warn("Our chain height: {} is out of sync with peer nodes chain height: {}", chainHeight.get(), getTargetHeight());

core/src/main/java/haveno/core/api/XmrLocalNode.java

@@ -150,16 +150,16 @@ public class XmrLocalNode {
     /**
      * Start a local Monero node from settings.
      */
-    public void startMoneroNode() throws IOException {
+    public void start() throws IOException {
         var settings = preferences.getXmrNodeSettings();
-        this.startNode(settings);
+        this.start(settings);
     }
 
     /**
      * Start local Monero node. Throws MoneroError if the node cannot be started.
      * Persist the settings to preferences if the node started successfully.
      */
-    public void startNode(XmrNodeSettings settings) throws IOException {
+    public void start(XmrNodeSettings settings) throws IOException {
         if (isDetected()) throw new IllegalStateException("Local Monero node already online");
 
         log.info("Starting local Monero node: " + settings);
@@ -177,6 +177,11 @@ public class XmrLocalNode {
             args.add("--bootstrap-daemon-address=" + bootstrapUrl);
         }
 
+        var syncBlockchain = settings.getSyncBlockchain();
+        if (syncBlockchain != null && !syncBlockchain) {
+            args.add("--no-sync");
+        }
+
         var flags = settings.getStartupFlags();
         if (flags != null) {
             args.addAll(flags);
@@ -191,7 +196,7 @@ public class XmrLocalNode {
      * Stop the current local Monero node if we own its process.
      * Does not remove the last XmrNodeSettings.
      */
-    public void stopNode() {
+    public void stop() {
         if (!isDetected()) throw new IllegalStateException("Local Monero node is not running");
         if (daemon.getProcess() == null || !daemon.getProcess().isAlive()) throw new IllegalStateException("Cannot stop local Monero node because we don't own its process"); // TODO (woodser): remove isAlive() check after monero-java 0.5.4 which nullifies internal process
         daemon.stopProcess();

core/src/main/java/haveno/core/xmr/XmrNodeSettings.java

@@ -35,6 +35,8 @@ public class XmrNodeSettings implements PersistableEnvelope {
     String bootstrapUrl;
     @Nullable
     List<String> startupFlags;
+    @Nullable
+    Boolean syncBlockchain;
 
     public XmrNodeSettings() {
     }
@@ -43,7 +45,8 @@ public class XmrNodeSettings implements PersistableEnvelope {
         return new XmrNodeSettings(
                 proto.getBlockchainPath(),
                 proto.getBootstrapUrl(),
-                proto.getStartupFlagsList());
+                proto.getStartupFlagsList(),
+                proto.getSyncBlockchain());
     }
 
     @Override
@@ -52,6 +55,7 @@ public class XmrNodeSettings implements PersistableEnvelope {
         Optional.ofNullable(blockchainPath).ifPresent(e -> builder.setBlockchainPath(blockchainPath));
         Optional.ofNullable(bootstrapUrl).ifPresent(e -> builder.setBootstrapUrl(bootstrapUrl));
         Optional.ofNullable(startupFlags).ifPresent(e -> builder.addAllStartupFlags(startupFlags));
+        Optional.ofNullable(syncBlockchain).ifPresent(e -> builder.setSyncBlockchain(syncBlockchain));
         return builder.build();
     }
 }

proto/src/main/proto/pb.proto

@@ -1754,6 +1754,7 @@ message XmrNodeSettings {
     string blockchain_path = 1;
     string bootstrap_url = 2;
     repeated string startup_flags = 3;
+    bool sync_blockchain = 4;
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////