Take a backup of local data before overwriting with a bootstrap.

Also moved the import phase to after the validation phase, so that the data returns after the bootstrap.

src/main/java/org/qortal/block/BlockChain.java

@@ -515,6 +515,7 @@ public class BlockChain {
 			if (!isTopOnly && archiveEnabled && canBootstrap) {
 				needsArchiveRebuild = (repository.getBlockArchiveRepository().fromHeight(2) == null);
 				LOGGER.info("Couldn't retrieve block 2 from archive. Bootstrapping...");
+				Controller.getInstance().exportRepositoryData();
 			}
 		}
 

src/main/java/org/qortal/controller/Controller.java

@@ -436,9 +436,6 @@ public class Controller extends Thread {
 			return; // Not System.exit() so that GUI can display error
 		}
 
-		// Import current trade bot states and minting accounts if they exist
-		Controller.importRepositoryData();
-
 		// Rebuild Names table and check database integrity
 		NamesDatabaseIntegrityCheck namesDatabaseIntegrityCheck = new NamesDatabaseIntegrityCheck();
 		namesDatabaseIntegrityCheck.rebuildAllNames();
@@ -456,6 +453,9 @@ public class Controller extends Thread {
 			return; // Not System.exit() so that GUI can display error
 		}
 
+		// Import current trade bot states and minting accounts if they exist
+		Controller.importRepositoryData();
+
 		LOGGER.info("Starting controller");
 		Controller.getInstance().start();
 
@@ -655,7 +655,7 @@ public class Controller extends Thread {
 	/**
 	 * Export current trade bot states and minting accounts.
 	 */
-	private void exportRepositoryData() {
+	public void exportRepositoryData() {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			repository.exportNodeLocalData();