Merge pull request #242 from crowetic/master

Bump version to 4.6.6 and other changes

WindowsInstaller/Install Files/AppData/settings.json

@@ -1,3 +1,4 @@
 {
-  "apiDocumentationEnabled": true
+  "apiDocumentationEnabled": true,
+  "apiWhitelistEnabled": false
 }

WindowsInstaller/README.md

@@ -2,7 +2,9 @@
 
 ## Prerequisites
 
-* AdvancedInstaller v19.4 or better, and enterprise licence if translations are required
+* AdvancedInstaller v19.4 or better, and enterprise licence. 
+* Qortal has an open source license, however it currently (as of December 2024) only supports up to version 19. (We may need to reach out to Advanced Installer again to obtain a new license at some point, if needed. 
+* Reach out to @crowetic for links to the installer install files, and license. 
 * Installed AdoptOpenJDK v17 64bit, full JDK *not* JRE
 
 ## General build instructions
@@ -10,6 +12,12 @@
 If this is your first time opening the `qortal.aip` file then you might need to adjust
 configured paths, or create a dummy `D:` drive with the expected layout.
 
+Opening the aip file from within a clone of the qortal repo also works, if you have a separate windows machine setup to do the build. 
+
+You May need to change the location of the 'jre64' files inside Advanced Installer, if it is set to a path that your build machine doesn't have. 
+
+The Java Memory Arguments can be set manually, but as of December 2024 they have been reset back to system defaults. This should include G1GC Garbage Collector.
+
 Typical build procedure:
 
 * Place the `qortal.jar` file in `Install-Files\`

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.qortal</groupId>
 	<artifactId>qortal</artifactId>
-	<version>4.6.2</version>
+	<version>4.6.6</version>
 	<packaging>jar</packaging>
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -16,7 +16,7 @@
 		<ciyam-at.version>1.4.2</ciyam-at.version>
 		<commons-net.version>3.8.0</commons-net.version>
 		<commons-text.version>1.12.0</commons-text.version>
-		<commons-io.version>2.17.0</commons-io.version>
+		<commons-io.version>2.18.0</commons-io.version>
 		<commons-compress.version>1.27.1</commons-compress.version>
 		<commons-lang3.version>3.17.0</commons-lang3.version>
 		<dagger.version>1.2.2</dagger.version>
@@ -26,9 +26,9 @@
 		<guava.version>33.3.1-jre</guava.version>
 		<hamcrest-library.version>2.2</hamcrest-library.version>
 		<homoglyph.version>1.2.1</homoglyph.version>
-		<hsqldb.version>2.5.1</hsqldb.version>
+		<hsqldb.version>2.7.4</hsqldb.version>
 		<icu4j.version>76.1</icu4j.version>
-		<java-diff-utils.version>4.12</java-diff-utils.version>
+		<java-diff-utils.version>4.15</java-diff-utils.version>
 		<javax.servlet-api.version>4.0.1</javax.servlet-api.version>
 		<jaxb-runtime.version>2.3.9</jaxb-runtime.version>
 		<jersey.version>2.42</jersey.version>

src/main/java/org/qortal/account/Account.java

@@ -198,78 +198,76 @@ public class Account {
 
 	/** Returns whether account can be considered a "minting account".
 	 * <p>
-	 * To be considered a "minting account", the account needs to pass all of these tests:<br>
+	 * To be considered a "minting account", the account needs to pass some of these tests:<br>
 	 * <ul>
 	 * <li>account's level is at least <tt>minAccountLevelToMint</tt> from blockchain config</li>
-	 * <li>account's address have registered a name</li>
-	 * <li>account's address is member of minter group</li>
+	 * <li>account's address has registered a name</li>
+	 * <li>account's address is a member of the minter group</li>
 	 * </ul>
 	 *
+	 * @param isGroupValidated true if this account has already been validated for MINTER Group membership
 	 * @return true if account can be considered "minting account"
 	 * @throws DataException
 	 */
-	public boolean canMint() throws DataException {
+	public boolean canMint(boolean isGroupValidated) throws DataException {
 		AccountData accountData = this.repository.getAccountRepository().getAccount(this.address);
 		NameRepository nameRepository = this.repository.getNameRepository();
 		GroupRepository groupRepository = this.repository.getGroupRepository();
+		String myAddress = accountData.getAddress();
 
 		int blockchainHeight = this.repository.getBlockRepository().getBlockchainHeight();
-		int nameCheckHeight = BlockChain.getInstance().getOnlyMintWithNameHeight();
 		int levelToMint = BlockChain.getInstance().getMinAccountLevelToMint();
 		int level = accountData.getLevel();
 		int groupIdToMint = BlockChain.getInstance().getMintingGroupId();
+		int nameCheckHeight = BlockChain.getInstance().getOnlyMintWithNameHeight();
 		int groupCheckHeight = BlockChain.getInstance().getGroupMemberCheckHeight();
 		int removeNameCheckHeight = BlockChain.getInstance().getRemoveOnlyMintWithNameHeight();
 
-		String myAddress = accountData.getAddress();
-		List<NameData> myName = nameRepository.getNamesByOwner(myAddress);
-		boolean isMember = groupRepository.memberExists(groupIdToMint, myAddress);
+		// Can only mint if:
+		// Account's level is at least minAccountLevelToMint from blockchain config
+		if (blockchainHeight < nameCheckHeight) {
+			if (Account.isFounder(accountData.getFlags())) {
+				return accountData.getBlocksMintedPenalty() == 0;
+			} else {
+				return level >= levelToMint;
+			}
+		}
 
-		if (accountData == null)
-			return false;
+		// Can only mint on onlyMintWithNameHeight from blockchain config if:
+		// Account's level is at least minAccountLevelToMint from blockchain config
+		// Account's address has registered a name
+		if (blockchainHeight >= nameCheckHeight && blockchainHeight < groupCheckHeight) {
+			List<NameData> myName = nameRepository.getNamesByOwner(myAddress);
+			if (Account.isFounder(accountData.getFlags())) {
+				return accountData.getBlocksMintedPenalty() == 0 && !myName.isEmpty();
+			} else {
+				return level >= levelToMint && !myName.isEmpty();
+			}
+		}
 
-		// Can only mint if level is at least minAccountLevelToMint< from blockchain config
-		if (blockchainHeight < nameCheckHeight && level >= levelToMint)
-			return true;
+		// Can only mint on groupMemberCheckHeight from blockchain config if:
+		// Account's level is at least minAccountLevelToMint from blockchain config
+		// Account's address has registered a name
+		// Account's address is a member of the minter group
+		if (blockchainHeight >= groupCheckHeight && blockchainHeight < removeNameCheckHeight) {
+			List<NameData> myName = nameRepository.getNamesByOwner(myAddress);
+			if (Account.isFounder(accountData.getFlags())) {
+				return accountData.getBlocksMintedPenalty() == 0 && !myName.isEmpty() && (isGroupValidated || groupRepository.memberExists(groupIdToMint, myAddress));
+			} else {
+				return level >= levelToMint && !myName.isEmpty() && (isGroupValidated || groupRepository.memberExists(groupIdToMint, myAddress));
+			}
+		}
 
-		// Can only mint if have registered a name
-		if (blockchainHeight >= nameCheckHeight && blockchainHeight < groupCheckHeight && level >= levelToMint && !myName.isEmpty())
-			return true;
-
-		// Can only mint if have registered a name and is member of minter group id
-		if (blockchainHeight >= groupCheckHeight && blockchainHeight < removeNameCheckHeight && level >= levelToMint && !myName.isEmpty() && isMember)
-			return true;
-
-		// Can only mint if is member of minter group id
-		if (blockchainHeight >= removeNameCheckHeight && level >= levelToMint && isMember)
-			return true;
-
-		// Founders needs to pass same tests like minters
-		if (blockchainHeight < nameCheckHeight &&
-				Account.isFounder(accountData.getFlags()) &&
-				accountData.getBlocksMintedPenalty() == 0)
-			return true;
-
-		if (blockchainHeight >= nameCheckHeight &&
-				blockchainHeight < groupCheckHeight &&
-				Account.isFounder(accountData.getFlags()) &&
-				accountData.getBlocksMintedPenalty() == 0 &&
-				!myName.isEmpty())
-			return true;
-
-		if (blockchainHeight >= groupCheckHeight &&
-				blockchainHeight < removeNameCheckHeight &&
-				Account.isFounder(accountData.getFlags()) &&
-				accountData.getBlocksMintedPenalty() == 0 &&
-				!myName.isEmpty() &&
-				isMember)
-			return true;
-
-		if (blockchainHeight >= removeNameCheckHeight &&
-				Account.isFounder(accountData.getFlags()) &&
-				accountData.getBlocksMintedPenalty() == 0 &&
-				isMember)
-			return true;
+		// Can only mint on removeOnlyMintWithNameHeight from blockchain config if:
+		// Account's level is at least minAccountLevelToMint from blockchain config
+		// Account's address is a member of the minter group
+		if (blockchainHeight >= removeNameCheckHeight) {
+			if (Account.isFounder(accountData.getFlags())) {
+				return accountData.getBlocksMintedPenalty() == 0 && (isGroupValidated || groupRepository.memberExists(groupIdToMint, myAddress));
+			} else {
+				return level >= levelToMint && (isGroupValidated || groupRepository.memberExists(groupIdToMint, myAddress));
+			}
+		}
 
 		return false;
 	}
@@ -284,7 +282,6 @@ public class Account {
 		return this.repository.getAccountRepository().getBlocksMintedPenaltyCount(this.address);
 	}
 
-
 	/** Returns whether account can build reward-shares.
 	 * <p>
 	 * To be able to create reward-shares, the account needs to pass at least one of these tests:<br>
@@ -298,6 +295,7 @@ public class Account {
 	 */
 	public boolean canRewardShare() throws DataException {
 		AccountData accountData = this.repository.getAccountRepository().getAccount(this.address);
+
 		if (accountData == null)
 			return false;
 
@@ -351,10 +349,28 @@ public class Account {
 	}
 
 	/**
-	 * Returns 'effective' minting level, or zero if reward-share does not exist.
+	 * Returns reward-share minting address, or unknown if reward-share does not exist.
 	 * 
 	 * @param repository
 	 * @param rewardSharePublicKey
+	 * @return address or unknown
+	 * @throws DataException
+	 */
+	public static String getRewardShareMintingAddress(Repository repository, byte[] rewardSharePublicKey) throws DataException {
+		// Find actual minter address
+		RewardShareData rewardShareData = repository.getAccountRepository().getRewardShare(rewardSharePublicKey);
+
+		if (rewardShareData == null)
+			return "Unknown";
+
+		return rewardShareData.getMinter();
+	}
+
+	/**
+	 * Returns 'effective' minting level, or zero if reward-share does not exist.
+	 *
+	 * @param repository
+	 * @param rewardSharePublicKey
 	 * @return 0+
 	 * @throws DataException
 	 */
@@ -367,6 +383,7 @@ public class Account {
 		Account rewardShareMinter = new Account(repository, rewardShareData.getMinter());
 		return rewardShareMinter.getEffectiveMintingLevel();
 	}
+
 	/**
 	 * Returns 'effective' minting level, with a fix for the zero level.
 	 * <p>

src/main/java/org/qortal/api/model/ApiOnlineAccount.java

@@ -1,7 +1,13 @@
 package org.qortal.api.model;
 
+import org.qortal.account.Account;
+import org.qortal.repository.DataException;
+import org.qortal.repository.RepositoryManager;
+import org.qortal.repository.Repository;
+
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlElement;
 
 // All properties to be converted to JSON via JAXB
 @XmlAccessorType(XmlAccessType.FIELD)
@@ -47,4 +53,31 @@ public class ApiOnlineAccount {
 		return this.recipientAddress;
 	}
 
+	public int getMinterLevelFromPublicKey() {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			return Account.getRewardShareEffectiveMintingLevel(repository, this.rewardSharePublicKey);
+		} catch (DataException e) {
+			return 0;
+		}
+	}
+
+	public boolean getIsMember() {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			return repository.getGroupRepository().memberExists(694, getMinterAddress());
+		} catch (DataException e) {
+			return false;
+		}
+	}
+
+	// JAXB special
+	
+	@XmlElement(name = "minterLevel")
+	protected int getMinterLevel() {
+		return getMinterLevelFromPublicKey();
+	}
+
+	@XmlElement(name = "isMinterMember")
+	protected boolean getMinterMember() {
+		return getIsMember();
+	}
 }

src/main/java/org/qortal/api/model/BlockMintingInfo.java

@@ -9,6 +9,7 @@ import java.math.BigInteger;
 public class BlockMintingInfo {
 
 	public byte[] minterPublicKey;
+	public String minterAddress;
 	public int minterLevel;
 	public int onlineAccountsCount;
 	public BigDecimal maxDistance;
@@ -19,5 +20,4 @@ public class BlockMintingInfo {
 
 	public BlockMintingInfo() {
 	}
-
 }

src/main/java/org/qortal/api/resource/BlocksResource.java

@@ -542,6 +542,7 @@ public class BlocksResource {
 				}
 			}
 
+			String minterAddress = Account.getRewardShareMintingAddress(repository, blockData.getMinterPublicKey());
 			int minterLevel = Account.getRewardShareEffectiveMintingLevel(repository, blockData.getMinterPublicKey());
 			if (minterLevel == 0)
 				// This may be unavailable when requesting a trimmed block
@@ -554,6 +555,7 @@ public class BlocksResource {
 
 			BlockMintingInfo blockMintingInfo = new BlockMintingInfo();
 			blockMintingInfo.minterPublicKey = blockData.getMinterPublicKey();
+			blockMintingInfo.minterAddress = minterAddress;
 			blockMintingInfo.minterLevel = minterLevel;
 			blockMintingInfo.onlineAccountsCount = blockData.getOnlineAccountsCount();
 			blockMintingInfo.maxDistance = new BigDecimal(block.MAX_DISTANCE);
@@ -887,5 +889,4 @@ public class BlocksResource {
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.REPOSITORY_ISSUE, e);
 		}
 	}
-
 }

src/main/java/org/qortal/api/resource/ChatResource.java

@@ -234,17 +234,21 @@ public class ChatResource {
 		}
 	)
 	@ApiErrors({ApiError.INVALID_CRITERIA, ApiError.INVALID_ADDRESS, ApiError.REPOSITORY_ISSUE})
-	public ActiveChats getActiveChats(@PathParam("address") String address, @QueryParam("encoding") Encoding encoding) {
+	public ActiveChats getActiveChats(
+		@PathParam("address") String address,
+		@QueryParam("encoding") Encoding encoding,
+		@QueryParam("haschatreference") Boolean hasChatReference
+	) {
 		if (address == null || !Crypto.isValidAddress(address))
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_ADDRESS);
-
+	
 		try (final Repository repository = RepositoryManager.getRepository()) {
-			return repository.getChatRepository().getActiveChats(address, encoding);
+			return repository.getChatRepository().getActiveChats(address, encoding, hasChatReference);
 		} catch (DataException e) {
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.REPOSITORY_ISSUE, e);
 		}
 	}
-
+	
 	@POST
 	@Operation(
 		summary = "Build raw, unsigned, CHAT transaction",

src/main/java/org/qortal/api/restricted/resource/AdminResource.java

@@ -459,7 +459,7 @@ public class AdminResource {
 
 			// Qortal: check reward-share's minting account is still allowed to mint
 			Account rewardShareMintingAccount = new Account(repository, rewardShareData.getMinter());
-			if (!rewardShareMintingAccount.canMint())
+			if (!rewardShareMintingAccount.canMint(false))
 				throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.CANNOT_MINT);
 
 			MintingAccountData mintingAccountData = new MintingAccountData(mintingAccount.getPrivateKey(), mintingAccount.getPublicKey());

src/main/java/org/qortal/api/websocket/ActiveChatsWebSocket.java

@@ -77,7 +77,9 @@ public class ActiveChatsWebSocket extends ApiWebSocket {
 		}
 
 		try (final Repository repository = RepositoryManager.getRepository()) {
-			ActiveChats activeChats = repository.getChatRepository().getActiveChats(ourAddress, getTargetEncoding(session));
+			Boolean hasChatReference = getHasChatReference(session);
+
+			ActiveChats activeChats = repository.getChatRepository().getActiveChats(ourAddress, getTargetEncoding(session), hasChatReference);
 
 			StringWriter stringWriter = new StringWriter();
 
@@ -103,4 +105,20 @@ public class ActiveChatsWebSocket extends ApiWebSocket {
 		return Encoding.valueOf(encoding);
 	}
 
+	private Boolean getHasChatReference(Session session) {
+		Map<String, List<String>> queryParams = session.getUpgradeRequest().getParameterMap();
+		List<String> hasChatReferenceList = queryParams.get("haschatreference");
+	
+		// Return null if not specified
+		if (hasChatReferenceList != null && hasChatReferenceList.size() == 1) {
+			String value = hasChatReferenceList.get(0).toLowerCase();
+			if (value.equals("true")) {
+				return true;
+			} else if (value.equals("false")) {
+				return false;
+			}
+		}
+		return null; // Ignored if not present
+	}
+
 }

src/main/java/org/qortal/arbitrary/ArbitraryDataRenderer.java

@@ -168,7 +168,7 @@ public class ArbitraryDataRenderer {
                 byte[] data = Files.readAllBytes(filePath); // TODO: limit file size that can be read into memory
                 HTMLParser htmlParser = new HTMLParser(resourceId, inPath, prefix, includeResourceIdInPrefix, data, qdnContext, service, identifier, theme, usingCustomRouting);
                 htmlParser.addAdditionalHeaderTags();
-                response.addHeader("Content-Security-Policy", "default-src 'self' 'unsafe-inline' 'unsafe-eval'; media-src 'self' data: blob:; img-src 'self' data: blob:;");
+                response.addHeader("Content-Security-Policy", "default-src 'self' 'unsafe-inline' 'unsafe-eval'; font-src 'self' data:; media-src 'self' data: blob:; img-src 'self' data: blob:; connect-src 'self' wss:;");
                 response.setContentType(context.getMimeType(filename));
                 response.setContentLength(htmlParser.getData().length);
                 response.getOutputStream().write(htmlParser.getData());

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

@@ -25,10 +25,7 @@ import org.qortal.data.block.BlockSummaryData;
 import org.qortal.data.block.BlockTransactionData;
 import org.qortal.data.network.OnlineAccountData;
 import org.qortal.data.transaction.TransactionData;
-import org.qortal.repository.ATRepository;
-import org.qortal.repository.DataException;
-import org.qortal.repository.Repository;
-import org.qortal.repository.TransactionRepository;
+import org.qortal.repository.*;
 import org.qortal.settings.Settings;
 import org.qortal.transaction.AtTransaction;
 import org.qortal.transaction.Transaction;
@@ -144,10 +141,13 @@ public class Block {
 		private final Account mintingAccount;
 		private final AccountData mintingAccountData;
 		private final boolean isMinterFounder;
+		private final boolean isMinterMember;
 
 		private final Account recipientAccount;
 		private final AccountData recipientAccountData;
 
+		final BlockChain blockChain = BlockChain.getInstance();
+
 		ExpandedAccount(Repository repository, RewardShareData rewardShareData) throws DataException {
 			this.rewardShareData = rewardShareData;
 			this.sharePercent = this.rewardShareData.getSharePercent();
@@ -157,6 +157,7 @@ public class Block {
 			this.isMinterFounder = Account.isFounder(mintingAccountData.getFlags());
 
 			this.isRecipientAlsoMinter = this.rewardShareData.getRecipient().equals(this.mintingAccount.getAddress());
+			this.isMinterMember = repository.getGroupRepository().memberExists(BlockChain.getInstance().getMintingGroupId(), this.mintingAccount.getAddress());
 
 			if (this.isRecipientAlsoMinter) {
 				// Self-share: minter is also recipient
@@ -181,7 +182,7 @@ public class Block {
 		 * <p>
 		 * This is a method, not a final variable, because account's level can change between construction and call,
 		 * e.g. during Block.process() where account levels are bumped right before Block.distributeBlockReward().
-		 * 
+		 *
 		 *  @return account-level share "bin" from blockchain config, or null if founder / none found
 		 */
 		public AccountLevelShareBin getShareBin(int blockHeight) {
@@ -192,8 +193,12 @@ public class Block {
 			if (accountLevel <= 0)
 				return null; // level 0 isn't included in any share bins
 
+			if (blockHeight >= blockChain.getFixBatchRewardHeight()) {
+				if (!this.isMinterMember)
+					return null; // not member of minter group isn't included in any share bins
+			}
+
 			// Select the correct set of share bins based on block height
-			final BlockChain blockChain = BlockChain.getInstance();
 			final AccountLevelShareBin[] shareBinsByLevel = (blockHeight >= blockChain.getSharesByLevelV2Height()) ?
 					blockChain.getShareBinsByAccountLevelV2() : blockChain.getShareBinsByAccountLevelV1();
 
@@ -262,7 +267,7 @@ public class Block {
 	 * Constructs new Block without loading transactions and AT states.
 	 * <p>
 	 * Transactions and AT states are loaded on first call to getTransactions() or getATStates() respectively.
-	 * 
+	 *
 	 * @param repository
 	 * @param blockData
 	 */
@@ -333,7 +338,7 @@ public class Block {
 
 	/**
 	 * Constructs new Block with empty transaction list, using passed minter account.
-	 * 
+	 *
 	 * @param repository
 	 * @param blockData
 	 * @param minter
@@ -351,7 +356,7 @@ public class Block {
 	 * This constructor typically used when minting a new block.
 	 * <p>
 	 * Note that CIYAM ATs will be executed and AT-Transactions prepended to this block, along with AT state data and fees.
-	 * 
+	 *
 	 * @param repository
 	 * @param parentBlockData
 	 * @param minter
@@ -377,7 +382,7 @@ public class Block {
 		byte[] encodedOnlineAccounts = new byte[0];
 		int onlineAccountsCount = 0;
 		byte[] onlineAccountsSignatures = null;
-		
+
 		if (isBatchRewardDistributionBlock(height)) {
 			// Batch reward distribution block - copy online accounts from recent block with highest online accounts count
 
@@ -409,6 +414,21 @@ public class Block {
 				});
 			}
 
+			// After feature trigger, remove any online accounts that are not minter group member
+			if (height >= BlockChain.getInstance().getGroupMemberCheckHeight()) {
+				onlineAccounts.removeIf(a -> {
+					try {
+						int groupId = BlockChain.getInstance().getMintingGroupId();
+						String address = Account.getRewardShareMintingAddress(repository, a.getPublicKey());
+						boolean isMinterGroupMember = repository.getGroupRepository().memberExists(groupId, address);
+						return !isMinterGroupMember;
+					} catch (DataException e) {
+						// Something went wrong, so remove the account
+						return true;
+					}
+				});
+			}
+
 			if (onlineAccounts.isEmpty()) {
 				LOGGER.debug("No online accounts - not even our own?");
 				return null;
@@ -512,7 +532,7 @@ public class Block {
 	 * Mints new block using this block as template, but with different minting account.
 	 * <p>
 	 * NOTE: uses the same transactions list, AT states, etc.
-	 * 
+	 *
 	 * @param minter
 	 * @return
 	 * @throws DataException
@@ -598,7 +618,7 @@ public class Block {
 
 	/**
 	 * Return composite block signature (minterSignature + transactionsSignature).
-	 * 
+	 *
 	 * @return byte[], or null if either component signature is null.
 	 */
 	public byte[] getSignature() {
@@ -613,7 +633,7 @@ public class Block {
 	 * <p>
 	 * We're starting with version 4 as a nod to being newer than successor Qora,
 	 * whose latest block version was 3.
-	 * 
+	 *
 	 * @return 1, 2, 3 or 4
 	 */
 	public int getNextBlockVersion() {
@@ -627,7 +647,7 @@ public class Block {
 	 * Return block's transactions.
 	 * <p>
 	 * If the block was loaded from repository then it's possible this method will call the repository to fetch the transactions if not done already.
-	 * 
+	 *
 	 * @return
 	 * @throws DataException
 	 */
@@ -661,7 +681,7 @@ public class Block {
 	 * If the block was loaded from repository then it's possible this method will call the repository to fetch the AT states if not done already.
 	 * <p>
 	 * <b>Note:</b> AT states fetched from repository only contain summary info, not actual data like serialized state data or AT creation timestamps!
-	 * 
+	 *
 	 * @return
 	 * @throws DataException
 	 */
@@ -697,7 +717,7 @@ public class Block {
 	 * <p>
 	 * Typically called as part of Block.process() or Block.orphan()
 	 * so ideally after any calls to Block.isValid().
-	 * 
+	 *
 	 * @throws DataException
 	 */
 	public List<ExpandedAccount> getExpandedAccounts() throws DataException {
@@ -715,10 +735,20 @@ public class Block {
 
 		List<ExpandedAccount> expandedAccounts = new ArrayList<>();
 
-		for (RewardShareData rewardShare : this.cachedOnlineRewardShares)
-			expandedAccounts.add(new ExpandedAccount(repository, rewardShare));
+		for (RewardShareData rewardShare : this.cachedOnlineRewardShares) {
+			int groupId = BlockChain.getInstance().getMintingGroupId();
+			String address = rewardShare.getMinter();
+			boolean isMinterGroupMember = repository.getGroupRepository().memberExists(groupId, address);
+
+			if (this.getBlockData().getHeight() < BlockChain.getInstance().getFixBatchRewardHeight())
+				expandedAccounts.add(new ExpandedAccount(repository, rewardShare));
+
+			if (this.getBlockData().getHeight() >= BlockChain.getInstance().getFixBatchRewardHeight() && isMinterGroupMember)
+				expandedAccounts.add(new ExpandedAccount(repository, rewardShare));
+		}
 
 		this.cachedExpandedAccounts = expandedAccounts;
+		LOGGER.trace(() -> String.format("Online reward-shares after expanded accounts %s", this.cachedOnlineRewardShares));
 
 		return this.cachedExpandedAccounts;
 	}
@@ -727,7 +757,7 @@ public class Block {
 
 	/**
 	 * Load parent block's data from repository via this block's reference.
-	 * 
+	 *
 	 * @return parent's BlockData, or null if no parent found
 	 * @throws DataException
 	 */
@@ -741,7 +771,7 @@ public class Block {
 
 	/**
 	 * Load child block's data from repository via this block's signature.
-	 * 
+	 *
 	 * @return child's BlockData, or null if no parent found
 	 * @throws DataException
 	 */
@@ -761,7 +791,7 @@ public class Block {
 	 * Used when constructing a new block during minting.
 	 * <p>
 	 * Requires block's {@code minter} being a {@code PrivateKeyAccount} so block's transactions signature can be recalculated.
-	 * 
+	 *
 	 * @param transactionData
 	 * @return true if transaction successfully added to block, false otherwise
 	 * @throws IllegalStateException
@@ -814,7 +844,7 @@ public class Block {
 	 * Used when constructing a new block during minting.
 	 * <p>
 	 * Requires block's {@code minter} being a {@code PrivateKeyAccount} so block's transactions signature can be recalculated.
-	 * 
+	 *
 	 * @param transactionData
 	 * @throws IllegalStateException
 	 *             if block's {@code minter} is not a {@code PrivateKeyAccount}.
@@ -859,7 +889,7 @@ public class Block {
 	 * previous block's minter signature + minter's public key + (encoded) online-accounts data
 	 * <p>
 	 * (Previous block's minter signature is extracted from this block's reference).
-	 * 
+	 *
 	 * @throws IllegalStateException
 	 *             if block's {@code minter} is not a {@code PrivateKeyAccount}.
 	 * @throws RuntimeException
@@ -876,7 +906,7 @@ public class Block {
 	 * Recalculate block's transactions signature.
 	 * <p>
 	 * Requires block's {@code minter} being a {@code PrivateKeyAccount}.
-	 * 
+	 *
 	 * @throws IllegalStateException
 	 *             if block's {@code minter} is not a {@code PrivateKeyAccount}.
 	 * @throws RuntimeException
@@ -998,7 +1028,7 @@ public class Block {
 	 * Recalculate block's minter and transactions signatures, thus giving block full signature.
 	 * <p>
 	 * Note: Block instance must have been constructed with a <tt>PrivateKeyAccount</tt> minter or this call will throw an <tt>IllegalStateException</tt>.
-	 * 
+	 *
 	 * @throws IllegalStateException
 	 *             if block's {@code minter} is not a {@code PrivateKeyAccount}.
 	 */
@@ -1011,7 +1041,7 @@ public class Block {
 
 	/**
 	 * Returns whether this block's signatures are valid.
-	 * 
+	 *
 	 * @return true if both minter and transaction signatures are valid, false otherwise
 	 */
 	public boolean isSignatureValid() {
@@ -1035,7 +1065,7 @@ public class Block {
 	 * <p>
 	 * Used by BlockMinter to check whether it's time to mint a new block,
 	 * and also used by Block.isValid for checks (if not a testchain).
-	 * 
+	 *
 	 * @return ValidationResult.OK if timestamp valid, or some other ValidationResult otherwise.
 	 * @throws DataException
 	 */
@@ -1128,8 +1158,17 @@ public class Block {
 		if (this.getBlockData().getHeight() >= BlockChain.getInstance().getOnlineAccountMinterLevelValidationHeight()) {
 			List<ExpandedAccount> expandedAccounts = this.getExpandedAccounts();
 			for (ExpandedAccount account : expandedAccounts) {
+				int groupId = BlockChain.getInstance().getMintingGroupId();
+				String address = account.getMintingAccount().getAddress();
+				boolean isMinterGroupMember = repository.getGroupRepository().memberExists(groupId, address);
+
 				if (account.getMintingAccount().getEffectiveMintingLevel() == 0)
 					return ValidationResult.ONLINE_ACCOUNTS_INVALID;
+
+				if (this.getBlockData().getHeight() >= BlockChain.getInstance().getFixBatchRewardHeight()) {
+					if (!isMinterGroupMember)
+						return ValidationResult.ONLINE_ACCOUNTS_INVALID;
+				}
 			}
 		}
 
@@ -1215,7 +1254,7 @@ public class Block {
 	 * <p>
 	 * Checks block's transactions by testing their validity then processing them.<br>
 	 * Hence uses a repository savepoint during execution.
-	 * 
+	 *
 	 * @return ValidationResult.OK if block is valid, or some other ValidationResult otherwise.
 	 * @throws DataException
 	 */
@@ -1258,6 +1297,7 @@ public class Block {
 
 		// Online Accounts
 		ValidationResult onlineAccountsResult = this.areOnlineAccountsValid();
+		LOGGER.trace("Accounts valid = {}", onlineAccountsResult);
 		if (onlineAccountsResult != ValidationResult.OK)
 			return onlineAccountsResult;
 
@@ -1346,7 +1386,7 @@ public class Block {
 				// Check transaction can even be processed
 				validationResult = transaction.isProcessable();
 				if (validationResult != Transaction.ValidationResult.OK) {
-					LOGGER.info(String.format("Error during transaction validation, tx %s: %s", Base58.encode(transactionData.getSignature()), validationResult.name()));
+					LOGGER.debug(String.format("Error during transaction validation, tx %s: %s", Base58.encode(transactionData.getSignature()), validationResult.name()));
 					return ValidationResult.TRANSACTION_INVALID;
 				}
 
@@ -1386,7 +1426,7 @@ public class Block {
 	 * <p>
 	 * NOTE: will execute ATs locally if not already done.<br>
 	 * This is so we have locally-generated AT states for comparison.
-	 * 
+	 *
 	 * @return OK, or some AT-related validation result
 	 * @throws DataException
 	 */
@@ -1462,11 +1502,11 @@ public class Block {
 	 * Note: this method does not store new AT state data into repository - that is handled by <tt>process()</tt>.
 	 * <p>
 	 * This method is not needed if fetching an existing block from the repository as AT state data will be loaded from repository as well.
-	 * 
+	 *
 	 * @see #isValid()
-	 * 
+	 *
 	 * @throws DataException
-	 * 
+	 *
 	 */
 	private void executeATs() throws DataException {
 		// We're expecting a lack of AT state data at this point.
@@ -1518,7 +1558,7 @@ public class Block {
 			return false;
 
 		Account mintingAccount = new PublicKeyAccount(this.repository, rewardShareData.getMinterPublicKey());
-		return mintingAccount.canMint();
+		return mintingAccount.canMint(false);
 	}
 
 	/**
@@ -1538,7 +1578,7 @@ public class Block {
 
 	/**
 	 * Process block, and its transactions, adding them to the blockchain.
-	 * 
+	 *
 	 * @throws DataException
 	 */
 	public void process() throws DataException {
@@ -1547,6 +1587,7 @@ public class Block {
 		this.blockData.setHeight(blockchainHeight + 1);
 
 		LOGGER.trace(() -> String.format("Processing block %d", this.blockData.getHeight()));
+		LOGGER.trace(() -> String.format("Online Reward Shares in process %s", this.cachedOnlineRewardShares));
 
 		if (this.blockData.getHeight() > 1) {
 
@@ -1839,7 +1880,7 @@ public class Block {
 
 	/**
 	 * Removes block from blockchain undoing transactions and adding them to unconfirmed pile.
-	 * 
+	 *
 	 * @throws DataException
 	 */
 	public void orphan() throws DataException {
@@ -1879,7 +1920,7 @@ public class Block {
 					SelfSponsorshipAlgoV3Block.orphanAccountPenalties(this);
 				}
 			}
-			
+
 			// Account levels and block rewards are only processed/orphaned on block reward distribution blocks
 			if (this.isRewardDistributionBlock()) {
 				// Block rewards, including transaction fees, removed after transactions undone
@@ -2213,6 +2254,7 @@ public class Block {
 		List<AccountBalanceData> accountBalanceDeltas = balanceChanges.entrySet().stream()
 				.map(entry -> new AccountBalanceData(entry.getKey(), Asset.QORT, entry.getValue()))
 				.collect(Collectors.toList());
+		LOGGER.trace("Account Balance Deltas: {}", accountBalanceDeltas);
 		this.repository.getAccountRepository().modifyAssetBalances(accountBalanceDeltas);
 	}
 
@@ -2225,30 +2267,30 @@ public class Block {
 
 		/*
 		 * Distribution rules:
-		 * 
+		 *
 		 * Distribution is based on the minting account of 'online' reward-shares.
-		 * 
+		 *
 		 * If ANY founders are online, then they receive the leftover non-distributed reward.
 		 * If NO founders are online, then account-level-based rewards are scaled up so 100% of reward is allocated.
-		 * 
+		 *
 		 * If ANY non-maxxed legacy QORA holders exist then they are always allocated their fixed share (e.g. 20%).
-		 * 
+		 *
 		 * There has to be either at least one 'online' account for blocks to be minted
 		 * so there is always either one account-level-based or founder reward candidate.
-		 * 
+		 *
 		 * Examples:
-		 * 
+		 *
 		 * With at least one founder online:
 		 * Level 1/2 accounts: 5%
 		 * Legacy QORA holders: 20%
 		 * Founders: ~75%
-		 * 
+		 *
 		 * No online founders:
 		 * Level 1/2 accounts: 5%
 		 * Level 5/6 accounts: 15%
 		 * Legacy QORA holders: 20%
 		 * Total: 40%
-		 * 
+		 *
 		 * After scaling account-level-based shares to fill 100%:
 		 * Level 1/2 accounts: 20%
 		 * Level 5/6 accounts: 60%
@@ -2264,7 +2306,6 @@ public class Block {
 		// Select the correct set of share bins based on block height
 		List<AccountLevelShareBin> accountLevelShareBinsForBlock = (this.blockData.getHeight() >= BlockChain.getInstance().getSharesByLevelV2Height()) ?
 				BlockChain.getInstance().getAccountLevelShareBinsV2() : BlockChain.getInstance().getAccountLevelShareBinsV1();
-
 		// Determine reward candidates based on account level
 		// This needs a deep copy, so the shares can be modified when tiers aren't activated yet
 		List<AccountLevelShareBin> accountLevelShareBins = new ArrayList<>();
@@ -2554,9 +2595,11 @@ public class Block {
 				return;
 
 			int minterLevel = Account.getRewardShareEffectiveMintingLevel(this.repository, this.getMinter().getPublicKey());
+			String minterAddress = Account.getRewardShareMintingAddress(this.repository, this.getMinter().getPublicKey());
 
 			LOGGER.debug(String.format("======= BLOCK %d (%.8s) =======", this.getBlockData().getHeight(), Base58.encode(this.getSignature())));
 			LOGGER.debug(String.format("Timestamp: %d", this.getBlockData().getTimestamp()));
+			LOGGER.debug(String.format("Minter address: %s", minterAddress));
 			LOGGER.debug(String.format("Minter level: %d", minterLevel));
 			LOGGER.debug(String.format("Online accounts: %d", this.getBlockData().getOnlineAccountsCount()));
 			LOGGER.debug(String.format("AT count: %d", this.getBlockData().getATCount()));

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

@@ -87,7 +87,8 @@ public class BlockChain {
 		enableRewardshareHeight,
 		onlyMintWithNameHeight,
 		removeOnlyMintWithNameHeight,
-		groupMemberCheckHeight
+		groupMemberCheckHeight,
+		fixBatchRewardHeight
 	}
 
 	// Custom transaction fees
@@ -657,6 +658,10 @@ public class BlockChain {
 		return this.featureTriggers.get(FeatureTrigger.groupMemberCheckHeight.name()).intValue();
 	}
 
+	public int getFixBatchRewardHeight() {
+		return this.featureTriggers.get(FeatureTrigger.fixBatchRewardHeight.name()).intValue();
+	}
+
 	// More complex getters for aspects that change by height or timestamp
 
 	public long getRewardAtHeight(int ourHeight) {

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

@@ -97,364 +97,375 @@ public class BlockMinter extends Thread {
 
 		final boolean isSingleNodeTestnet = Settings.getInstance().isSingleNodeTestnet();
 
-		try (final Repository repository = RepositoryManager.getRepository()) {
-			// Going to need this a lot...
-			BlockRepository blockRepository = repository.getBlockRepository();
-
-			// Flags for tracking change in whether minting is possible,
-			// so we can notify Controller, and further update SysTray, etc.
-			boolean isMintingPossible = false;
-			boolean wasMintingPossible = isMintingPossible;
+		// Flags for tracking change in whether minting is possible,
+		// so we can notify Controller, and further update SysTray, etc.
+		boolean isMintingPossible = false;
+		boolean wasMintingPossible = isMintingPossible;
+		try {
 			while (running) {
-				if (isMintingPossible != wasMintingPossible)
-					Controller.getInstance().onMintingPossibleChange(isMintingPossible);
+				// recreate repository for new loop iteration
+				try (final Repository repository = RepositoryManager.getRepository()) {
 
-				wasMintingPossible = isMintingPossible;
+					// Going to need this a lot...
+					BlockRepository blockRepository = repository.getBlockRepository();
 
-				try {
-					// Free up any repository locks
-					repository.discardChanges();
+					if (isMintingPossible != wasMintingPossible)
+						Controller.getInstance().onMintingPossibleChange(isMintingPossible);
 
-					// Sleep for a while.
-					// It's faster on single node testnets, to allow lots of blocks to be minted quickly.
-					Thread.sleep(isSingleNodeTestnet ? 50 : 1000);
-
-					isMintingPossible = false;
-
-					final Long now = NTP.getTime();
-					if (now == null)
-						continue;
-
-					final Long minLatestBlockTimestamp = Controller.getMinimumLatestBlockTimestamp();
-					if (minLatestBlockTimestamp == null)
-						continue;
-
-					List<MintingAccountData> mintingAccountsData = repository.getAccountRepository().getMintingAccounts();
-					// No minting accounts?
-					if (mintingAccountsData.isEmpty())
-						continue;
-
-					// Disregard minting accounts that are no longer valid, e.g. by transfer/loss of founder flag or account level
-					// Note that minting accounts are actually reward-shares in Qortal
-					Iterator<MintingAccountData> madi = mintingAccountsData.iterator();
-					while (madi.hasNext()) {
-						MintingAccountData mintingAccountData = madi.next();
-
-						RewardShareData rewardShareData = repository.getAccountRepository().getRewardShare(mintingAccountData.getPublicKey());
-						if (rewardShareData == null) {
-							// Reward-share doesn't exist - probably cancelled but not yet removed from node's list of minting accounts
-							madi.remove();
-							continue;
-						}
-
-						Account mintingAccount = new Account(repository, rewardShareData.getMinter());
-						if (!mintingAccount.canMint()) {
-							// Minting-account component of reward-share can no longer mint - disregard
-							madi.remove();
-							continue;
-						}
-
-						// Optional (non-validated) prevention of block submissions below a defined level.
-						// This is an unvalidated version of Blockchain.minAccountLevelToMint
-						// and exists only to reduce block candidates by default.
-						int level = mintingAccount.getEffectiveMintingLevel();
-						if (level < BlockChain.getInstance().getMinAccountLevelForBlockSubmissions()) {
-							madi.remove();
-                        }
-					}
-
-					// Needs a mutable copy of the unmodifiableList
-					List<Peer> peers = new ArrayList<>(Network.getInstance().getImmutableHandshakedPeers());
-					BlockData lastBlockData = blockRepository.getLastBlock();
-
-					// Disregard peers that have "misbehaved" recently
-					peers.removeIf(Controller.hasMisbehaved);
-
-					// Disregard peers that don't have a recent block, but only if we're not in recovery mode.
-					// In that mode, we want to allow minting on top of older blocks, to recover stalled networks.
-					if (!Synchronizer.getInstance().getRecoveryMode())
-						peers.removeIf(Controller.hasNoRecentBlock);
-
-					// Don't mint if we don't have enough up-to-date peers as where would the transactions/consensus come from?
-					if (peers.size() < Settings.getInstance().getMinBlockchainPeers())
-						continue;
-
-					// If we are stuck on an invalid block, we should allow an alternative to be minted
-					boolean recoverInvalidBlock = false;
-					if (Synchronizer.getInstance().timeInvalidBlockLastReceived != null) {
-						// We've had at least one invalid block
-						long timeSinceLastValidBlock = NTP.getTime() - Synchronizer.getInstance().timeValidBlockLastReceived;
-						long timeSinceLastInvalidBlock = NTP.getTime() - Synchronizer.getInstance().timeInvalidBlockLastReceived;
-						if (timeSinceLastValidBlock > INVALID_BLOCK_RECOVERY_TIMEOUT) {
-							if (timeSinceLastInvalidBlock < INVALID_BLOCK_RECOVERY_TIMEOUT) {
-								// Last valid block was more than 10 mins ago, but we've had an invalid block since then
-								// Assume that the chain has stalled because there is no alternative valid candidate
-								// Enter recovery mode to allow alternative, valid candidates to be minted
-								recoverInvalidBlock = true;
-							}
-						}
-					}
-
-					// If our latest block isn't recent then we need to synchronize instead of minting, unless we're in recovery mode.
-					if (!peers.isEmpty() && lastBlockData.getTimestamp() < minLatestBlockTimestamp)
-						if (!Synchronizer.getInstance().getRecoveryMode() && !recoverInvalidBlock)
-							continue;
-
-					// There are enough peers with a recent block and our latest block is recent
-					// so go ahead and mint a block if possible.
-					isMintingPossible = true;
-
-					// Check blockchain hasn't changed
-					if (previousBlockData == null || !Arrays.equals(previousBlockData.getSignature(), lastBlockData.getSignature())) {
-						previousBlockData = lastBlockData;
-						newBlocks.clear();
-
-						// Reduce log timeout
-						logTimeout = 10 * 1000L;
-
-						// Last low weight block is no longer valid
-						parentSignatureForLastLowWeightBlock = null;
-					}
-
-					// Discard accounts we have already built blocks with
-					mintingAccountsData.removeIf(mintingAccountData -> newBlocks.stream().anyMatch(newBlock -> Arrays.equals(newBlock.getBlockData().getMinterPublicKey(), mintingAccountData.getPublicKey())));
-
-					// Do we need to build any potential new blocks?
-					List<PrivateKeyAccount> newBlocksMintingAccounts = mintingAccountsData.stream().map(accountData -> new PrivateKeyAccount(repository, accountData.getPrivateKey())).collect(Collectors.toList());
-
-					// We might need to sit the next block out, if one of our minting accounts signed the previous one
-					// Skip this check for single node testnets, since they definitely need to mint every block
-					byte[] previousBlockMinter = previousBlockData.getMinterPublicKey();
-					boolean mintedLastBlock = mintingAccountsData.stream().anyMatch(mintingAccount -> Arrays.equals(mintingAccount.getPublicKey(), previousBlockMinter));
-					if (mintedLastBlock && !isSingleNodeTestnet) {
-						LOGGER.trace(String.format("One of our keys signed the last block, so we won't sign the next one"));
-						continue;
-					}
-
-					if (parentSignatureForLastLowWeightBlock != null) {
-						// The last iteration found a higher weight block in the network, so sleep for a while
-						// to allow is to sync the higher weight chain. We are sleeping here rather than when
-						// detected as we don't want to hold the blockchain lock open.
-						LOGGER.info("Sleeping for 10 seconds...");
-						Thread.sleep(10 * 1000L);
-					}
-
-					for (PrivateKeyAccount mintingAccount : newBlocksMintingAccounts) {
-						// First block does the AT heavy-lifting
-						if (newBlocks.isEmpty()) {
-							Block newBlock = Block.mint(repository, previousBlockData, mintingAccount);
-							if (newBlock == null) {
-								// For some reason we can't mint right now
-								moderatedLog(() -> LOGGER.info("Couldn't build a to-be-minted block"));
-								continue;
-							}
-
-							newBlocks.add(newBlock);
-						} else {
-							// The blocks for other minters require less effort...
-							Block newBlock = newBlocks.get(0).remint(mintingAccount);
-							if (newBlock == null) {
-								// For some reason we can't mint right now
-								moderatedLog(() -> LOGGER.error("Couldn't rebuild a to-be-minted block"));
-								continue;
-							}
-
-							newBlocks.add(newBlock);
-						}
-					}
-
-					// No potential block candidates?
-					if (newBlocks.isEmpty())
-						continue;
-
-					// Make sure we're the only thread modifying the blockchain
-					ReentrantLock blockchainLock = Controller.getInstance().getBlockchainLock();
-					if (!blockchainLock.tryLock(30, TimeUnit.SECONDS)) {
-						LOGGER.debug("Couldn't acquire blockchain lock even after waiting 30 seconds");
-						continue;
-					}
-
-					boolean newBlockMinted = false;
-					Block newBlock = null;
+					wasMintingPossible = isMintingPossible;
 
 					try {
-						// Clear repository session state so we have latest view of data
+						// reset the repository, to the repository recreated for this loop iteration
+						for( Block newBlock : newBlocks ) newBlock.setRepository(repository);
+
+						// Free up any repository locks
 						repository.discardChanges();
 
-						// Now that we have blockchain lock, do final check that chain hasn't changed
-						BlockData latestBlockData = blockRepository.getLastBlock();
-						if (!Arrays.equals(lastBlockData.getSignature(), latestBlockData.getSignature()))
+						// Sleep for a while.
+						// It's faster on single node testnets, to allow lots of blocks to be minted quickly.
+						Thread.sleep(isSingleNodeTestnet ? 50 : 1000);
+
+						isMintingPossible = false;
+
+						final Long now = NTP.getTime();
+						if (now == null)
 							continue;
 
-						List<Block> goodBlocks = new ArrayList<>();
-						boolean wasInvalidBlockDiscarded = false;
-						Iterator<Block> newBlocksIterator = newBlocks.iterator();
+						final Long minLatestBlockTimestamp = Controller.getMinimumLatestBlockTimestamp();
+						if (minLatestBlockTimestamp == null)
+							continue;
 
-						while (newBlocksIterator.hasNext()) {
-							Block testBlock = newBlocksIterator.next();
+						List<MintingAccountData> mintingAccountsData = repository.getAccountRepository().getMintingAccounts();
+						// No minting accounts?
+						if (mintingAccountsData.isEmpty())
+							continue;
 
-							// Is new block's timestamp valid yet?
-							// We do a separate check as some timestamp checks are skipped for testchains
-							if (testBlock.isTimestampValid() != ValidationResult.OK)
+						// Disregard minting accounts that are no longer valid, e.g. by transfer/loss of founder flag or account level
+						// Note that minting accounts are actually reward-shares in Qortal
+						Iterator<MintingAccountData> madi = mintingAccountsData.iterator();
+						while (madi.hasNext()) {
+							MintingAccountData mintingAccountData = madi.next();
+
+							RewardShareData rewardShareData = repository.getAccountRepository().getRewardShare(mintingAccountData.getPublicKey());
+							if (rewardShareData == null) {
+								// Reward-share doesn't exist - probably cancelled but not yet removed from node's list of minting accounts
+								madi.remove();
+								continue;
+							}
+
+							Account mintingAccount = new Account(repository, rewardShareData.getMinter());
+							if (!mintingAccount.canMint(true)) {
+								// Minting-account component of reward-share can no longer mint - disregard
+								madi.remove();
+								continue;
+							}
+
+							// Optional (non-validated) prevention of block submissions below a defined level.
+							// This is an unvalidated version of Blockchain.minAccountLevelToMint
+							// and exists only to reduce block candidates by default.
+							int level = mintingAccount.getEffectiveMintingLevel();
+							if (level < BlockChain.getInstance().getMinAccountLevelForBlockSubmissions()) {
+								madi.remove();
+							}
+						}
+
+						// Needs a mutable copy of the unmodifiableList
+						List<Peer> peers = new ArrayList<>(Network.getInstance().getImmutableHandshakedPeers());
+						BlockData lastBlockData = blockRepository.getLastBlock();
+
+						// Disregard peers that have "misbehaved" recently
+						peers.removeIf(Controller.hasMisbehaved);
+
+						// Disregard peers that don't have a recent block, but only if we're not in recovery mode.
+						// In that mode, we want to allow minting on top of older blocks, to recover stalled networks.
+						if (!Synchronizer.getInstance().getRecoveryMode())
+							peers.removeIf(Controller.hasNoRecentBlock);
+
+						// Don't mint if we don't have enough up-to-date peers as where would the transactions/consensus come from?
+						if (peers.size() < Settings.getInstance().getMinBlockchainPeers())
+							continue;
+
+						// If we are stuck on an invalid block, we should allow an alternative to be minted
+						boolean recoverInvalidBlock = false;
+						if (Synchronizer.getInstance().timeInvalidBlockLastReceived != null) {
+							// We've had at least one invalid block
+							long timeSinceLastValidBlock = NTP.getTime() - Synchronizer.getInstance().timeValidBlockLastReceived;
+							long timeSinceLastInvalidBlock = NTP.getTime() - Synchronizer.getInstance().timeInvalidBlockLastReceived;
+							if (timeSinceLastValidBlock > INVALID_BLOCK_RECOVERY_TIMEOUT) {
+								if (timeSinceLastInvalidBlock < INVALID_BLOCK_RECOVERY_TIMEOUT) {
+									// Last valid block was more than 10 mins ago, but we've had an invalid block since then
+									// Assume that the chain has stalled because there is no alternative valid candidate
+									// Enter recovery mode to allow alternative, valid candidates to be minted
+									recoverInvalidBlock = true;
+								}
+							}
+						}
+
+						// If our latest block isn't recent then we need to synchronize instead of minting, unless we're in recovery mode.
+						if (!peers.isEmpty() && lastBlockData.getTimestamp() < minLatestBlockTimestamp)
+							if (!Synchronizer.getInstance().getRecoveryMode() && !recoverInvalidBlock)
 								continue;
 
-							testBlock.preProcess();
+						// There are enough peers with a recent block and our latest block is recent
+						// so go ahead and mint a block if possible.
+						isMintingPossible = true;
 
-							// Is new block valid yet? (Before adding unconfirmed transactions)
-							ValidationResult result = testBlock.isValid();
-							if (result != ValidationResult.OK) {
-								moderatedLog(() -> LOGGER.error(String.format("To-be-minted block invalid '%s' before adding transactions?", result.name())));
+						// Check blockchain hasn't changed
+						if (previousBlockData == null || !Arrays.equals(previousBlockData.getSignature(), lastBlockData.getSignature())) {
+							previousBlockData = lastBlockData;
+							newBlocks.clear();
 
-								newBlocksIterator.remove();
-								wasInvalidBlockDiscarded = true;
-								/*
-								 * Bail out fast so that we loop around from the top again.
-								 * This gives BlockMinter the possibility to remint this candidate block using another block from newBlocks,
-								 * via the Blocks.remint() method, which avoids having to re-process Block ATs all over again.
-								 * Particularly useful if some aspect of Blocks changes due a timestamp-based feature-trigger (see BlockChain class).
-								 */
-								break;
-							}
+							// Reduce log timeout
+							logTimeout = 10 * 1000L;
 
-							goodBlocks.add(testBlock);
+							// Last low weight block is no longer valid
+							parentSignatureForLastLowWeightBlock = null;
 						}
 
-						if (wasInvalidBlockDiscarded || goodBlocks.isEmpty())
+						// Discard accounts we have already built blocks with
+						mintingAccountsData.removeIf(mintingAccountData -> newBlocks.stream().anyMatch(newBlock -> Arrays.equals(newBlock.getBlockData().getMinterPublicKey(), mintingAccountData.getPublicKey())));
+
+						// Do we need to build any potential new blocks?
+						List<PrivateKeyAccount> newBlocksMintingAccounts = mintingAccountsData.stream().map(accountData -> new PrivateKeyAccount(repository, accountData.getPrivateKey())).collect(Collectors.toList());
+
+						// We might need to sit the next block out, if one of our minting accounts signed the previous one
+						// Skip this check for single node testnets, since they definitely need to mint every block
+						byte[] previousBlockMinter = previousBlockData.getMinterPublicKey();
+						boolean mintedLastBlock = mintingAccountsData.stream().anyMatch(mintingAccount -> Arrays.equals(mintingAccount.getPublicKey(), previousBlockMinter));
+						if (mintedLastBlock && !isSingleNodeTestnet) {
+							LOGGER.trace(String.format("One of our keys signed the last block, so we won't sign the next one"));
 							continue;
-
-						// Pick best block
-						final int parentHeight = previousBlockData.getHeight();
-						final byte[] parentBlockSignature = previousBlockData.getSignature();
-
-						BigInteger bestWeight = null;
-
-						for (int bi = 0; bi < goodBlocks.size(); ++bi) {
-							BlockData blockData = goodBlocks.get(bi).getBlockData();
-
-							BlockSummaryData blockSummaryData = new BlockSummaryData(blockData);
-							int minterLevel = Account.getRewardShareEffectiveMintingLevel(repository, blockData.getMinterPublicKey());
-							blockSummaryData.setMinterLevel(minterLevel);
-
-							BigInteger blockWeight = Block.calcBlockWeight(parentHeight, parentBlockSignature, blockSummaryData);
-
-							if (bestWeight == null || blockWeight.compareTo(bestWeight) < 0) {
-								newBlock = goodBlocks.get(bi);
-								bestWeight = blockWeight;
-							}
 						}
 
-						try {
-							if (this.higherWeightChainExists(repository, bestWeight)) {
+						if (parentSignatureForLastLowWeightBlock != null) {
+							// The last iteration found a higher weight block in the network, so sleep for a while
+							// to allow is to sync the higher weight chain. We are sleeping here rather than when
+							// detected as we don't want to hold the blockchain lock open.
+							LOGGER.info("Sleeping for 10 seconds...");
+							Thread.sleep(10 * 1000L);
+						}
 
-								// Check if the base block has updated since the last time we were here
-								if (parentSignatureForLastLowWeightBlock == null || timeOfLastLowWeightBlock == null ||
-										!Arrays.equals(parentSignatureForLastLowWeightBlock, previousBlockData.getSignature())) {
-									// We've switched to a different chain, so reset the timer
-									timeOfLastLowWeightBlock = NTP.getTime();
-								}
-								parentSignatureForLastLowWeightBlock = previousBlockData.getSignature();
-
-								// If less than 30 seconds has passed since first detection the higher weight chain,
-								// we should skip our block submission to give us the opportunity to sync to the better chain
-								if (NTP.getTime() - timeOfLastLowWeightBlock < 30 * 1000L) {
-									LOGGER.info("Higher weight chain found in peers, so not signing a block this round");
-									LOGGER.info("Time since detected: {}", NTP.getTime() - timeOfLastLowWeightBlock);
+						for (PrivateKeyAccount mintingAccount : newBlocksMintingAccounts) {
+							// First block does the AT heavy-lifting
+							if (newBlocks.isEmpty()) {
+								Block newBlock = Block.mint(repository, previousBlockData, mintingAccount);
+								if (newBlock == null) {
+									// For some reason we can't mint right now
+									moderatedLog(() -> LOGGER.info("Couldn't build a to-be-minted block"));
 									continue;
-								} else {
-									// More than 30 seconds have passed, so we should submit our block candidate anyway.
-									LOGGER.info("More than 30 seconds passed, so proceeding to submit block candidate...");
 								}
+
+								newBlocks.add(newBlock);
 							} else {
-								LOGGER.debug("No higher weight chain found in peers");
+								// The blocks for other minters require less effort...
+								Block newBlock = newBlocks.get(0).remint(mintingAccount);
+								if (newBlock == null) {
+									// For some reason we can't mint right now
+									moderatedLog(() -> LOGGER.error("Couldn't rebuild a to-be-minted block"));
+									continue;
+								}
+
+								newBlocks.add(newBlock);
 							}
-						} catch (DataException e) {
-							LOGGER.debug("Unable to check for a higher weight chain. Proceeding anyway...");
 						}
 
-						// Discard any uncommitted changes as a result of the higher weight chain detection
-						repository.discardChanges();
+						// No potential block candidates?
+						if (newBlocks.isEmpty())
+							continue;
 
-						// Clear variables that track low weight blocks
-						parentSignatureForLastLowWeightBlock = null;
-						timeOfLastLowWeightBlock = null;
-
-						Long unconfirmedStartTime = NTP.getTime();
-
-						// Add unconfirmed transactions
-						addUnconfirmedTransactions(repository, newBlock);
-
-						LOGGER.info(String.format("Adding %d unconfirmed transactions took %d ms", newBlock.getTransactions().size(), (NTP.getTime()-unconfirmedStartTime)));
-
-						// Sign to create block's signature
-						newBlock.sign();
-
-						// Is newBlock still valid?
-						ValidationResult validationResult = newBlock.isValid();
-						if (validationResult != ValidationResult.OK) {
-							// No longer valid? Report and discard
-							LOGGER.error(String.format("To-be-minted block now invalid '%s' after adding unconfirmed transactions?", validationResult.name()));
-
-							// Rebuild block candidates, just to be sure
-							newBlocks.clear();
+						// Make sure we're the only thread modifying the blockchain
+						ReentrantLock blockchainLock = Controller.getInstance().getBlockchainLock();
+						if (!blockchainLock.tryLock(30, TimeUnit.SECONDS)) {
+							LOGGER.debug("Couldn't acquire blockchain lock even after waiting 30 seconds");
 							continue;
 						}
 
-						// Add to blockchain - something else will notice and broadcast new block to network
+						boolean newBlockMinted = false;
+						Block newBlock = null;
+
 						try {
-							newBlock.process();
+							// Clear repository session state so we have latest view of data
+							repository.discardChanges();
 
-							repository.saveChanges();
+							// Now that we have blockchain lock, do final check that chain hasn't changed
+							BlockData latestBlockData = blockRepository.getLastBlock();
+							if (!Arrays.equals(lastBlockData.getSignature(), latestBlockData.getSignature()))
+								continue;
 
-							LOGGER.info(String.format("Minted new block: %d", newBlock.getBlockData().getHeight()));
+							List<Block> goodBlocks = new ArrayList<>();
+							boolean wasInvalidBlockDiscarded = false;
+							Iterator<Block> newBlocksIterator = newBlocks.iterator();
 
-							RewardShareData rewardShareData = repository.getAccountRepository().getRewardShare(newBlock.getBlockData().getMinterPublicKey());
+							while (newBlocksIterator.hasNext()) {
+								Block testBlock = newBlocksIterator.next();
 
-							if (rewardShareData != null) {
-								LOGGER.info(String.format("Minted block %d, sig %.8s, parent sig: %.8s by %s on behalf of %s",
-										newBlock.getBlockData().getHeight(),
-										Base58.encode(newBlock.getBlockData().getSignature()),
-										Base58.encode(newBlock.getParent().getSignature()),
-										rewardShareData.getMinter(),
-										rewardShareData.getRecipient()));
-							} else {
-								LOGGER.info(String.format("Minted block %d, sig %.8s, parent sig: %.8s by %s",
-										newBlock.getBlockData().getHeight(),
-										Base58.encode(newBlock.getBlockData().getSignature()),
-										Base58.encode(newBlock.getParent().getSignature()),
-										newBlock.getMinter().getAddress()));
+								// Is new block's timestamp valid yet?
+								// We do a separate check as some timestamp checks are skipped for testchains
+								if (testBlock.isTimestampValid() != ValidationResult.OK)
+									continue;
+
+								testBlock.preProcess();
+
+								// Is new block valid yet? (Before adding unconfirmed transactions)
+								ValidationResult result = testBlock.isValid();
+								if (result != ValidationResult.OK) {
+									moderatedLog(() -> LOGGER.error(String.format("To-be-minted block invalid '%s' before adding transactions?", result.name())));
+
+									newBlocksIterator.remove();
+									wasInvalidBlockDiscarded = true;
+									/*
+									 * Bail out fast so that we loop around from the top again.
+									 * This gives BlockMinter the possibility to remint this candidate block using another block from newBlocks,
+									 * via the Blocks.remint() method, which avoids having to re-process Block ATs all over again.
+									 * Particularly useful if some aspect of Blocks changes due a timestamp-based feature-trigger (see BlockChain class).
+									 */
+									break;
+								}
+
+								goodBlocks.add(testBlock);
 							}
 
-							// Notify network after we're released blockchain lock
-							newBlockMinted = true;
+							if (wasInvalidBlockDiscarded || goodBlocks.isEmpty())
+								continue;
 
-							// Notify Controller
-							repository.discardChanges(); // clear transaction status to prevent deadlocks
-							Controller.getInstance().onNewBlock(newBlock.getBlockData());
-						} catch (DataException e) {
-							// Unable to process block - report and discard
-							LOGGER.error("Unable to process newly minted block?", e);
-							newBlocks.clear();
-						} catch (ArithmeticException e) {
-							// Unable to process block - report and discard
-							LOGGER.error("Unable to process newly minted block?", e);
-							newBlocks.clear();
+							// Pick best block
+							final int parentHeight = previousBlockData.getHeight();
+							final byte[] parentBlockSignature = previousBlockData.getSignature();
+
+							BigInteger bestWeight = null;
+
+							for (int bi = 0; bi < goodBlocks.size(); ++bi) {
+								BlockData blockData = goodBlocks.get(bi).getBlockData();
+
+								BlockSummaryData blockSummaryData = new BlockSummaryData(blockData);
+								int minterLevel = Account.getRewardShareEffectiveMintingLevel(repository, blockData.getMinterPublicKey());
+								blockSummaryData.setMinterLevel(minterLevel);
+
+								BigInteger blockWeight = Block.calcBlockWeight(parentHeight, parentBlockSignature, blockSummaryData);
+
+								if (bestWeight == null || blockWeight.compareTo(bestWeight) < 0) {
+									newBlock = goodBlocks.get(bi);
+									bestWeight = blockWeight;
+								}
+							}
+
+							try {
+								if (this.higherWeightChainExists(repository, bestWeight)) {
+
+									// Check if the base block has updated since the last time we were here
+									if (parentSignatureForLastLowWeightBlock == null || timeOfLastLowWeightBlock == null ||
+											!Arrays.equals(parentSignatureForLastLowWeightBlock, previousBlockData.getSignature())) {
+										// We've switched to a different chain, so reset the timer
+										timeOfLastLowWeightBlock = NTP.getTime();
+									}
+									parentSignatureForLastLowWeightBlock = previousBlockData.getSignature();
+
+									// If less than 30 seconds has passed since first detection the higher weight chain,
+									// we should skip our block submission to give us the opportunity to sync to the better chain
+									if (NTP.getTime() - timeOfLastLowWeightBlock < 30 * 1000L) {
+										LOGGER.info("Higher weight chain found in peers, so not signing a block this round");
+										LOGGER.info("Time since detected: {}", NTP.getTime() - timeOfLastLowWeightBlock);
+										continue;
+									} else {
+										// More than 30 seconds have passed, so we should submit our block candidate anyway.
+										LOGGER.info("More than 30 seconds passed, so proceeding to submit block candidate...");
+									}
+								} else {
+									LOGGER.debug("No higher weight chain found in peers");
+								}
+							} catch (DataException e) {
+								LOGGER.debug("Unable to check for a higher weight chain. Proceeding anyway...");
+							}
+
+							// Discard any uncommitted changes as a result of the higher weight chain detection
+							repository.discardChanges();
+
+							// Clear variables that track low weight blocks
+							parentSignatureForLastLowWeightBlock = null;
+							timeOfLastLowWeightBlock = null;
+
+							Long unconfirmedStartTime = NTP.getTime();
+
+							// Add unconfirmed transactions
+							addUnconfirmedTransactions(repository, newBlock);
+
+							LOGGER.info(String.format("Adding %d unconfirmed transactions took %d ms", newBlock.getTransactions().size(), (NTP.getTime() - unconfirmedStartTime)));
+
+							// Sign to create block's signature
+							newBlock.sign();
+
+							// Is newBlock still valid?
+							ValidationResult validationResult = newBlock.isValid();
+							if (validationResult != ValidationResult.OK) {
+								// No longer valid? Report and discard
+								LOGGER.error(String.format("To-be-minted block now invalid '%s' after adding unconfirmed transactions?", validationResult.name()));
+
+								// Rebuild block candidates, just to be sure
+								newBlocks.clear();
+								continue;
+							}
+
+							// Add to blockchain - something else will notice and broadcast new block to network
+							try {
+								newBlock.process();
+
+								repository.saveChanges();
+
+								LOGGER.info(String.format("Minted new block: %d", newBlock.getBlockData().getHeight()));
+
+								RewardShareData rewardShareData = repository.getAccountRepository().getRewardShare(newBlock.getBlockData().getMinterPublicKey());
+
+								if (rewardShareData != null) {
+									LOGGER.info(String.format("Minted block %d, sig %.8s, parent sig: %.8s by %s on behalf of %s",
+											newBlock.getBlockData().getHeight(),
+											Base58.encode(newBlock.getBlockData().getSignature()),
+											Base58.encode(newBlock.getParent().getSignature()),
+											rewardShareData.getMinter(),
+											rewardShareData.getRecipient()));
+								} else {
+									LOGGER.info(String.format("Minted block %d, sig %.8s, parent sig: %.8s by %s",
+											newBlock.getBlockData().getHeight(),
+											Base58.encode(newBlock.getBlockData().getSignature()),
+											Base58.encode(newBlock.getParent().getSignature()),
+											newBlock.getMinter().getAddress()));
+								}
+
+								// Notify network after we're released blockchain lock
+								newBlockMinted = true;
+
+								// Notify Controller
+								repository.discardChanges(); // clear transaction status to prevent deadlocks
+								Controller.getInstance().onNewBlock(newBlock.getBlockData());
+							} catch (DataException e) {
+								// Unable to process block - report and discard
+								LOGGER.error("Unable to process newly minted block?", e);
+								newBlocks.clear();
+							} catch (ArithmeticException e) {
+								// Unable to process block - report and discard
+								LOGGER.error("Unable to process newly minted block?", e);
+								newBlocks.clear();
+							}
+						} finally {
+							blockchainLock.unlock();
 						}
-					} finally {
-						blockchainLock.unlock();
-					}
 
-					if (newBlockMinted) {
-						// Broadcast our new chain to network
-						Network.getInstance().broadcastOurChain();
-					}
+						if (newBlockMinted) {
+							// Broadcast our new chain to network
+							Network.getInstance().broadcastOurChain();
+						}
 
-				} catch (InterruptedException e) {
-					// We've been interrupted - time to exit
-					return;
+					} catch (InterruptedException e) {
+						// We've been interrupted - time to exit
+						return;
+					}
+				} catch (DataException e) {
+					LOGGER.warn("Repository issue while running block minter - NO LONGER MINTING", e);
+				} catch (Exception e) {
+					LOGGER.error(e.getMessage(), e);
 				}
 			}
-		} catch (DataException e) {
-			LOGGER.warn("Repository issue while running block minter - NO LONGER MINTING", e);
+		} catch (Exception e) {
+			LOGGER.error(e.getMessage(), e);
 		}
 	}
 

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

@@ -13,6 +13,7 @@ import org.qortal.block.Block;
 import org.qortal.block.BlockChain;
 import org.qortal.block.BlockChain.BlockTimingByHeight;
 import org.qortal.controller.arbitrary.*;
+import org.qortal.controller.hsqldb.HSQLDBBalanceRecorder;
 import org.qortal.controller.hsqldb.HSQLDBDataCacheManager;
 import org.qortal.controller.repository.NamesDatabaseIntegrityCheck;
 import org.qortal.controller.repository.PruneManager;
@@ -36,7 +37,6 @@ import org.qortal.network.Peer;
 import org.qortal.network.PeerAddress;
 import org.qortal.network.message.*;
 import org.qortal.repository.*;
-import org.qortal.repository.hsqldb.HSQLDBRepository;
 import org.qortal.repository.hsqldb.HSQLDBRepositoryFactory;
 import org.qortal.settings.Settings;
 import org.qortal.transaction.Transaction;
@@ -73,6 +73,8 @@ import java.util.stream.Collectors;
 
 public class Controller extends Thread {
 
+	public static HSQLDBRepositoryFactory REPOSITORY_FACTORY;
+
 	static {
 		// This must go before any calls to LogManager/Logger
 		System.setProperty("log4j2.formatMsgNoLookups", "true");
@@ -403,23 +405,38 @@ public class Controller extends Thread {
 
 		LOGGER.info("Starting repository");
 		try {
-			RepositoryFactory repositoryFactory = new HSQLDBRepositoryFactory(getRepositoryUrl());
-			RepositoryManager.setRepositoryFactory(repositoryFactory);
+			REPOSITORY_FACTORY = new HSQLDBRepositoryFactory(getRepositoryUrl());
+			RepositoryManager.setRepositoryFactory(REPOSITORY_FACTORY);
 			RepositoryManager.setRequestedCheckpoint(Boolean.TRUE);
 
 			try (final Repository repository = RepositoryManager.getRepository()) {
 				// RepositoryManager.rebuildTransactionSequences(repository);
 				ArbitraryDataCacheManager.getInstance().buildArbitraryResourcesCache(repository, false);
+			}
 
-				if( Settings.getInstance().isDbCacheEnabled() ) {
-					LOGGER.info("Db Cache Starting ...");
-					HSQLDBDataCacheManager hsqldbDataCacheManager = new HSQLDBDataCacheManager((HSQLDBRepository) repositoryFactory.getRepository());
-					hsqldbDataCacheManager.start();
+			if( Settings.getInstance().isDbCacheEnabled() ) {
+				LOGGER.info("Db Cache Starting ...");
+				HSQLDBDataCacheManager hsqldbDataCacheManager = new HSQLDBDataCacheManager();
+				hsqldbDataCacheManager.start();
+			}
+			else {
+				LOGGER.info("Db Cache Disabled");
+			}
+
+			if( Settings.getInstance().isBalanceRecorderEnabled() ) {
+				Optional<HSQLDBBalanceRecorder> recorder = HSQLDBBalanceRecorder.getInstance();
+
+				if( recorder.isPresent() ) {
+					LOGGER.info("Balance Recorder Starting ...");
+					recorder.get().start();
 				}
 				else {
-					LOGGER.info("Db Cache Disabled");
+					LOGGER.info("Balance Recorder won't start.");
 				}
 			}
+			else {
+				LOGGER.info("Balance Recorder Disabled");
+			}
 		} catch (DataException e) {
 			// If exception has no cause or message then repository is in use by some other process.
 			if (e.getCause() == null && e.getMessage() == null) {
@@ -639,10 +656,8 @@ public class Controller extends Thread {
 				boolean canBootstrap = Settings.getInstance().getBootstrap();
 				boolean needsArchiveRebuild = false;
 				int checkHeight = 0;
-				Repository repository = null;
 
-				try {
-					repository = RepositoryManager.getRepository();
+				try (final Repository repository = RepositoryManager.getRepository()){
 					needsArchiveRebuild = (repository.getBlockArchiveRepository().fromHeight(2) == null);
 					checkHeight = repository.getBlockRepository().getBlockchainHeight();
 				} catch (DataException e) {

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

@@ -13,6 +13,7 @@ import org.qortal.crypto.MemoryPoW;
 import org.qortal.crypto.Qortal25519Extras;
 import org.qortal.data.account.MintingAccountData;
 import org.qortal.data.account.RewardShareData;
+import org.qortal.data.group.GroupMemberData;
 import org.qortal.data.network.OnlineAccountData;
 import org.qortal.network.Network;
 import org.qortal.network.Peer;
@@ -224,6 +225,12 @@ public class OnlineAccountsManager {
         Set<OnlineAccountData> onlineAccountsToAdd = new HashSet<>();
         Set<OnlineAccountData> onlineAccountsToRemove = new HashSet<>();
         try (final Repository repository = RepositoryManager.getRepository()) {
+            List<String> mintingGroupMemberAddresses
+                = repository.getGroupRepository()
+                    .getGroupMembers(BlockChain.getInstance().getMintingGroupId()).stream()
+                    .map(GroupMemberData::getMember)
+                    .collect(Collectors.toList());
+
             for (OnlineAccountData onlineAccountData : this.onlineAccountsImportQueue) {
                 if (isStopping)
                     return;
@@ -236,7 +243,7 @@ public class OnlineAccountsManager {
                     continue;
                 }
 
-                boolean isValid = this.isValidCurrentAccount(repository, onlineAccountData);
+                boolean isValid = this.isValidCurrentAccount(repository, mintingGroupMemberAddresses, onlineAccountData);
                 if (isValid)
                     onlineAccountsToAdd.add(onlineAccountData);
 
@@ -315,7 +322,7 @@ public class OnlineAccountsManager {
         return inplaceArray;
     }
 
-    private static boolean isValidCurrentAccount(Repository repository, OnlineAccountData onlineAccountData) throws DataException {
+    private static boolean isValidCurrentAccount(Repository repository, List<String> mintingGroupMemberAddresses, OnlineAccountData onlineAccountData) throws DataException {
         final Long now = NTP.getTime();
         if (now == null)
             return false;
@@ -350,9 +357,14 @@ public class OnlineAccountsManager {
             LOGGER.trace(() -> String.format("Rejecting unknown online reward-share public key %s", Base58.encode(rewardSharePublicKey)));
             return false;
         }
+        // reject account address that are not in the MINTER Group
+        else if( !mintingGroupMemberAddresses.contains(rewardShareData.getMinter())) {
+            LOGGER.trace(() -> String.format("Rejecting online reward-share that is not in MINTER Group, account %s", rewardShareData.getMinter()));
+            return false;
+        }
 
         Account mintingAccount = new Account(repository, rewardShareData.getMinter());
-        if (!mintingAccount.canMint()) {
+        if (!mintingAccount.canMint(true)) {  // group validation is a few lines above
             // Minting-account component of reward-share can no longer mint - disregard
             LOGGER.trace(() -> String.format("Rejecting online reward-share with non-minting account %s", mintingAccount.getAddress()));
             return false;
@@ -539,7 +551,7 @@ public class OnlineAccountsManager {
                     }
 
                     Account mintingAccount = new Account(repository, rewardShareData.getMinter());
-                    if (!mintingAccount.canMint()) {
+                    if (!mintingAccount.canMint(true)) {
                         // Minting-account component of reward-share can no longer mint - disregard
                         iterator.remove();
                         continue;

src/main/java/org/qortal/controller/hsqldb/HSQLDBBalanceRecorder.java

@@ -0,0 +1,117 @@
+package org.qortal.controller.hsqldb;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.qortal.data.account.AccountBalanceData;
+import org.qortal.repository.hsqldb.HSQLDBCacheUtils;
+import org.qortal.settings.Settings;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
+
+public class HSQLDBBalanceRecorder extends Thread{
+
+    private static final Logger LOGGER = LogManager.getLogger(HSQLDBBalanceRecorder.class);
+
+    private static HSQLDBBalanceRecorder SINGLETON = null;
+
+    private ConcurrentHashMap<Integer, List<AccountBalanceData>> balancesByHeight = new ConcurrentHashMap<>();
+
+    private ConcurrentHashMap<String, List<AccountBalanceData>> balancesByAddress = new ConcurrentHashMap<>();
+
+    private int priorityRequested;
+    private int frequency;
+    private int capacity;
+
+    private HSQLDBBalanceRecorder( int priorityRequested, int frequency, int capacity) {
+
+        super("Balance Recorder");
+
+        this.priorityRequested = priorityRequested;
+        this.frequency = frequency;
+        this.capacity = capacity;
+    }
+
+    public static Optional<HSQLDBBalanceRecorder> getInstance() {
+
+        if( SINGLETON == null ) {
+
+            SINGLETON
+                = new HSQLDBBalanceRecorder(
+                    Settings.getInstance().getBalanceRecorderPriority(),
+                    Settings.getInstance().getBalanceRecorderFrequency(),
+                    Settings.getInstance().getBalanceRecorderCapacity()
+            );
+
+        }
+        else if( SINGLETON == null ) {
+
+            return Optional.empty();
+        }
+
+        return Optional.of(SINGLETON);
+    }
+
+    @Override
+    public void run() {
+
+        Thread.currentThread().setName("Balance Recorder");
+
+        HSQLDBCacheUtils.startRecordingBalances(this.balancesByHeight, this.balancesByAddress, this.priorityRequested, this.frequency, this.capacity);
+    }
+
+    public List<AccountBalanceData> getLatestRecordings(int limit, long offset) {
+        ArrayList<AccountBalanceData> data;
+
+        Optional<Integer> lastHeight = getLastHeight();
+
+        if(lastHeight.isPresent() ) {
+            List<AccountBalanceData> latest = this.balancesByHeight.get(lastHeight.get());
+
+            if( latest != null ) {
+                data = new ArrayList<>(latest.size());
+                data.addAll(
+                    latest.stream()
+                        .sorted(Comparator.comparingDouble(AccountBalanceData::getBalance).reversed())
+                        .skip(offset)
+                        .limit(limit)
+                        .collect(Collectors.toList())
+                );
+            }
+            else {
+                data = new ArrayList<>(0);
+            }
+        }
+        else {
+            data = new ArrayList<>(0);
+        }
+
+        return data;
+    }
+
+    private Optional<Integer> getLastHeight() {
+        return this.balancesByHeight.keySet().stream().sorted(Comparator.reverseOrder()).findFirst();
+    }
+
+    public List<Integer> getBlocksRecorded() {
+
+        return this.balancesByHeight.keySet().stream().collect(Collectors.toList());
+    }
+
+    public List<AccountBalanceData> getAccountBalanceRecordings(String address) {
+        return this.balancesByAddress.get(address);
+    }
+
+    @Override
+    public String toString() {
+        return "HSQLDBBalanceRecorder{" +
+                "priorityRequested=" + priorityRequested +
+                ", frequency=" + frequency +
+                ", capacity=" + capacity +
+                '}';
+    }
+}

src/main/java/org/qortal/controller/hsqldb/HSQLDBDataCacheManager.java

@@ -8,11 +8,7 @@ import org.qortal.settings.Settings;
 
 public class HSQLDBDataCacheManager extends Thread{
 
-    private HSQLDBRepository respository;
-
-    public HSQLDBDataCacheManager(HSQLDBRepository respository) {
-        this.respository = respository;
-    }
+    public HSQLDBDataCacheManager() {}
 
     @Override
     public void run() {
@@ -20,8 +16,7 @@ public class HSQLDBDataCacheManager extends Thread{
 
         HSQLDBCacheUtils.startCaching(
             Settings.getInstance().getDbCacheThreadPriority(),
-            Settings.getInstance().getDbCacheFrequency(),
-            this.respository
+            Settings.getInstance().getDbCacheFrequency()
         );
     }
 }

src/main/java/org/qortal/controller/repository/AtStatesPruner.java

@@ -39,15 +39,24 @@ public class AtStatesPruner implements Runnable {
 			}
 		}
 
+		int pruneStartHeight;
+		int maxLatestAtStatesHeight;
+
 		try (final Repository repository = RepositoryManager.getRepository()) {
-			int pruneStartHeight = repository.getATRepository().getAtPruneHeight();
-			int maxLatestAtStatesHeight = PruneManager.getMaxHeightForLatestAtStates(repository);
+			pruneStartHeight = repository.getATRepository().getAtPruneHeight();
+			maxLatestAtStatesHeight = PruneManager.getMaxHeightForLatestAtStates(repository);
 
 			repository.discardChanges();
 			repository.getATRepository().rebuildLatestAtStates(maxLatestAtStatesHeight);
 			repository.saveChanges();
+		} catch (Exception e) {
+			LOGGER.error("AT States Pruning is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
+			return;
+		}
+
+		while (!Controller.isStopping()) {
+			try (final Repository repository = RepositoryManager.getRepository()) {
 
-			while (!Controller.isStopping()) {
 				try {
 					repository.discardChanges();
 
@@ -102,28 +111,25 @@ public class AtStatesPruner implements Runnable {
 
 							final int finalPruneStartHeight = pruneStartHeight;
 							LOGGER.info(() -> String.format("Bumping AT state base prune height to %d", finalPruneStartHeight));
-						}
-						else {
+						} else {
 							// We've pruned up to the upper prunable height
 							// Back off for a while to save CPU for syncing
 							repository.discardChanges();
-							Thread.sleep(5*60*1000L);
+							Thread.sleep(5 * 60 * 1000L);
 						}
 					}
 				} catch (InterruptedException e) {
-					if(Controller.isStopping()) {
+					if (Controller.isStopping()) {
 						LOGGER.info("AT States Pruning Shutting Down");
-					}
-					else {
+					} else {
 						LOGGER.warn("AT States Pruning interrupted. Trying again. Report this error immediately to the developers.", e);
 					}
 				} catch (Exception e) {
 					LOGGER.warn("AT States Pruning stopped working. Trying again. Report this error immediately to the developers.", e);
 				}
+			} catch(Exception e){
+				LOGGER.error("AT States Pruning is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 			}
-		} catch (Exception e) {
-			LOGGER.error("AT States Pruning is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 		}
 	}
-
 }

src/main/java/org/qortal/controller/repository/AtStatesTrimmer.java

@@ -26,15 +26,23 @@ public class AtStatesTrimmer implements Runnable {
 			return;
 		}
 
+		int trimStartHeight;
+		int maxLatestAtStatesHeight;
+
 		try (final Repository repository = RepositoryManager.getRepository()) {
-			int trimStartHeight = repository.getATRepository().getAtTrimHeight();
-			int maxLatestAtStatesHeight = PruneManager.getMaxHeightForLatestAtStates(repository);
+			trimStartHeight = repository.getATRepository().getAtTrimHeight();
+			maxLatestAtStatesHeight = PruneManager.getMaxHeightForLatestAtStates(repository);
 
 			repository.discardChanges();
 			repository.getATRepository().rebuildLatestAtStates(maxLatestAtStatesHeight);
 			repository.saveChanges();
+		} catch (Exception e) {
+			LOGGER.error("AT States Trimming is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
+			return;
+		}
 
-			while (!Controller.isStopping()) {
+		while (!Controller.isStopping()) {
+			try (final Repository repository = RepositoryManager.getRepository()) {
 				try {
 					repository.discardChanges();
 
@@ -92,9 +100,9 @@ public class AtStatesTrimmer implements Runnable {
 				} catch (Exception e) {
 					LOGGER.warn("AT States Trimming stopped working. Trying again. Report this error immediately to the developers.", e);
 				}
+			} catch (Exception e) {
+				LOGGER.error("AT States Trimming is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 			}
-		} catch (Exception e) {
-			LOGGER.error("AT States Trimming is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 		}
 	}
 

src/main/java/org/qortal/controller/repository/BlockArchiver.java

@@ -30,11 +30,13 @@ public class BlockArchiver implements Runnable {
 			return;
 		}
 
+		int startHeight;
+
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			// Don't even start building until initial rush has ended
 			Thread.sleep(INITIAL_SLEEP_PERIOD);
 
-			int startHeight = repository.getBlockArchiveRepository().getBlockArchiveHeight();
+			startHeight = repository.getBlockArchiveRepository().getBlockArchiveHeight();
 
 			// Don't attempt to archive if we have no ATStatesHeightIndex, as it will be too slow
 			boolean hasAtStatesHeightIndex = repository.getATRepository().hasAtStatesHeightIndex();
@@ -43,10 +45,16 @@ public class BlockArchiver implements Runnable {
 				repository.discardChanges();
 				return;
 			}
+		} catch (Exception e) {
+			LOGGER.error("Block Archiving is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
+			return;
+		}
 
-			LOGGER.info("Starting block archiver from height {}...", startHeight);
+		LOGGER.info("Starting block archiver from height {}...", startHeight);
+
+		while (!Controller.isStopping()) {
+			try (final Repository repository = RepositoryManager.getRepository()) {
 
-			while (!Controller.isStopping()) {
 				try {
 					repository.discardChanges();
 
@@ -107,20 +115,17 @@ public class BlockArchiver implements Runnable {
 						LOGGER.info("Caught exception when creating block cache", e);
 					}
 				} catch (InterruptedException e) {
-					if(Controller.isStopping()) {
+					if (Controller.isStopping()) {
 						LOGGER.info("Block Archiving Shutting Down");
-					}
-					else {
+					} else {
 						LOGGER.warn("Block Archiving interrupted. Trying again. Report this error immediately to the developers.", e);
 					}
 				} catch (Exception e) {
 					LOGGER.warn("Block Archiving stopped working. Trying again. Report this error immediately to the developers.", e);
 				}
+			} catch(Exception e){
+				LOGGER.error("Block Archiving is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 			}
-		} catch (Exception e) {
-			LOGGER.error("Block Archiving is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 		}
-
 	}
-
 }

src/main/java/org/qortal/controller/repository/BlockPruner.java

@@ -39,8 +39,10 @@ public class BlockPruner implements Runnable {
 			}
 		}
 
+		int pruneStartHeight;
+
 		try (final Repository repository = RepositoryManager.getRepository()) {
-			int pruneStartHeight = repository.getBlockRepository().getBlockPruneHeight();
+			pruneStartHeight = repository.getBlockRepository().getBlockPruneHeight();
 
 			// Don't attempt to prune if we have no ATStatesHeightIndex, as it will be too slow
 			boolean hasAtStatesHeightIndex = repository.getATRepository().hasAtStatesHeightIndex();
@@ -48,8 +50,15 @@ public class BlockPruner implements Runnable {
 				LOGGER.info("Unable to start block pruner due to missing ATStatesHeightIndex. Bootstrapping is recommended.");
 				return;
 			}
+		} catch (Exception e) {
+			LOGGER.error("Block Pruning is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
+			return;
+		}
+
+		while (!Controller.isStopping()) {
+
+			try (final Repository repository = RepositoryManager.getRepository()) {
 
-			while (!Controller.isStopping()) {
 				try {
 					repository.discardChanges();
 
@@ -122,10 +131,9 @@ public class BlockPruner implements Runnable {
 				} catch (Exception e) {
 					LOGGER.warn("Block Pruning stopped working. Trying again. Report this error immediately to the developers.", e);
 				}
+			} catch(Exception e){
+				LOGGER.error("Block Pruning is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 			}
-		} catch (Exception e) {
-			LOGGER.error("Block Pruning is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 		}
 	}
-
 }

src/main/java/org/qortal/controller/repository/OnlineAccountsSignaturesTrimmer.java

@@ -28,13 +28,21 @@ public class OnlineAccountsSignaturesTrimmer implements Runnable {
 			return;
 		}
 
+		int trimStartHeight;
+
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			// Don't even start trimming until initial rush has ended
 			Thread.sleep(INITIAL_SLEEP_PERIOD);
 
-			int trimStartHeight = repository.getBlockRepository().getOnlineAccountsSignaturesTrimHeight();
+			trimStartHeight = repository.getBlockRepository().getOnlineAccountsSignaturesTrimHeight();
+		} catch (Exception e) {
+			LOGGER.error("Online Accounts Signatures Trimming is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
+			return;
+		}
+
+		while (!Controller.isStopping()) {
+			try (final Repository repository = RepositoryManager.getRepository()) {
 
-			while (!Controller.isStopping()) {
 				try {
 					repository.discardChanges();
 
@@ -88,10 +96,9 @@ public class OnlineAccountsSignaturesTrimmer implements Runnable {
 				} catch (Exception e) {
 					LOGGER.warn("Online Accounts Signatures Trimming stopped working. Trying again. Report this error immediately to the developers.", e);
 				}
+			} catch (Exception e) {
+				LOGGER.error("Online Accounts Signatures Trimming is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 			}
-		} catch (Exception e) {
-			LOGGER.error("Online Accounts Signatures Trimming is not working! Not trying again. Restart ASAP. Report this error immediately to the developers.", e);
 		}
 	}
-
 }

src/main/java/org/qortal/data/block/BlockData.java

@@ -1,8 +1,11 @@
 package org.qortal.data.block;
 
 import com.google.common.primitives.Bytes;
+import org.qortal.account.Account;
 import org.qortal.block.BlockChain;
-import org.qortal.crypto.Crypto;
+import org.qortal.repository.DataException;
+import org.qortal.repository.Repository;
+import org.qortal.repository.RepositoryManager;
 import org.qortal.settings.Settings;
 import org.qortal.utils.NTP;
 
@@ -224,7 +227,7 @@ public class BlockData implements Serializable {
 		}
 		return 0;
 	}
-
+	
 	public boolean isTrimmed() {
 		long onlineAccountSignaturesTrimmedTimestamp = NTP.getTime() - BlockChain.getInstance().getOnlineAccountSignaturesMaxLifetime();
 		long currentTrimmableTimestamp = NTP.getTime() - Settings.getInstance().getAtStatesMaxLifetime();
@@ -232,11 +235,31 @@ public class BlockData implements Serializable {
 		return blockTimestamp < onlineAccountSignaturesTrimmedTimestamp && blockTimestamp < currentTrimmableTimestamp;
 	}
 
+	public String getMinterAddressFromPublicKey() {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			return Account.getRewardShareMintingAddress(repository, this.minterPublicKey);
+		} catch (DataException e) {
+			return "Unknown";
+		}
+	}
+
+	public int getMinterLevelFromPublicKey() {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			return Account.getRewardShareEffectiveMintingLevel(repository, this.minterPublicKey);
+		} catch (DataException e) {
+			return 0;
+		}
+	}
+	
 	// JAXB special
 
 	@XmlElement(name = "minterAddress")
 	protected String getMinterAddress() {
-		return Crypto.toAddress(this.minterPublicKey);
+		return getMinterAddressFromPublicKey();
 	}
 
+	@XmlElement(name = "minterLevel")
+	protected int getMinterLevel() {
+		return getMinterLevelFromPublicKey();
+	}
 }

src/main/java/org/qortal/network/task/PeerConnectTask.java

@@ -4,10 +4,15 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.qortal.network.Network;
 import org.qortal.network.Peer;
+import org.qortal.utils.DaemonThreadFactory;
 import org.qortal.utils.ExecuteProduceConsume.Task;
 
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 public class PeerConnectTask implements Task {
     private static final Logger LOGGER = LogManager.getLogger(PeerConnectTask.class);
+    private static final ExecutorService connectionExecutor = Executors.newCachedThreadPool(new DaemonThreadFactory(8));
 
     private final Peer peer;
     private final String name;
@@ -24,6 +29,24 @@ public class PeerConnectTask implements Task {
 
     @Override
     public void perform() throws InterruptedException {
-        Network.getInstance().connectPeer(peer);
+        // Submit connection task to a dedicated thread pool for non-blocking I/O
+        connectionExecutor.submit(() -> {
+            try {
+                connectPeerAsync(peer);
+            } catch (InterruptedException e) {
+                LOGGER.error("Connection attempt interrupted for peer {}", peer, e);
+                Thread.currentThread().interrupt();  // Reset interrupt flag
+            }
+        });
+    }
+
+    private void connectPeerAsync(Peer peer) throws InterruptedException {
+        // Perform peer connection in a separate thread to avoid blocking main task execution
+        try {
+            Network.getInstance().connectPeer(peer);
+            LOGGER.trace("Successfully connected to peer {}", peer);
+        } catch (Exception e) {
+            LOGGER.error("Error connecting to peer {}", peer, e);
+        }
     }
 }

src/main/java/org/qortal/repository/ChatRepository.java

@@ -22,6 +22,6 @@ public interface ChatRepository {
 
 	public ChatMessage toChatMessage(ChatTransactionData chatTransactionData, Encoding encoding) throws DataException;
 
-	public ActiveChats getActiveChats(String address, Encoding encoding) throws DataException;
+	public ActiveChats getActiveChats(String address, Encoding encoding, Boolean hasChatReference) throws DataException;
 
 }

src/main/java/org/qortal/repository/hsqldb/HSQLDBCacheUtils.java

@@ -5,10 +5,13 @@ import org.apache.logging.log4j.Logger;
 import org.qortal.api.SearchMode;
 import org.qortal.arbitrary.misc.Category;
 import org.qortal.arbitrary.misc.Service;
+import org.qortal.controller.Controller;
+import org.qortal.data.account.AccountBalanceData;
 import org.qortal.data.arbitrary.ArbitraryResourceCache;
 import org.qortal.data.arbitrary.ArbitraryResourceData;
 import org.qortal.data.arbitrary.ArbitraryResourceMetadata;
 import org.qortal.data.arbitrary.ArbitraryResourceStatus;
+import org.qortal.repository.DataException;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -48,6 +51,11 @@ public class HSQLDBCacheUtils {
         }
     };
     private static final String DEFAULT_IDENTIFIER = "default";
+    private static final int ZERO = 0;
+    public static final String DB_CACHE_TIMER = "DB Cache Timer";
+    public static final String DB_CACHE_TIMER_TASK = "DB Cache Timer Task";
+    public static final String BALANCE_RECORDER_TIMER = "Balance Recorder Timer";
+    public static final String BALANCE_RECORDER_TIMER_TASK = "Balance Recorder Timer Task";
 
     /**
      *
@@ -351,13 +359,124 @@ public class HSQLDBCacheUtils {
      * Start Caching
      *
      * @param priorityRequested the thread priority to fill cache in
-     * @param frequency the frequency to fill the cache (in seconds)
-     * @param respository the data source
+     * @param frequency         the frequency to fill the cache (in seconds)
      *
      * @return the data cache
      */
-    public static void startCaching(int priorityRequested, int frequency, HSQLDBRepository respository) {
+    public static void startCaching(int priorityRequested, int frequency) {
 
+        Timer timer = buildTimer(DB_CACHE_TIMER, priorityRequested);
+
+        TimerTask task = new TimerTask() {
+            @Override
+            public void run() {
+
+                Thread.currentThread().setName(DB_CACHE_TIMER_TASK);
+
+                try (final HSQLDBRepository respository = (HSQLDBRepository) Controller.REPOSITORY_FACTORY.getRepository()) {
+                    fillCache(ArbitraryResourceCache.getInstance(), respository);
+                }
+                catch( DataException e ) {
+                    LOGGER.error(e.getMessage(), e);
+                }
+            }
+        };
+
+        // delay 1 second
+        timer.scheduleAtFixedRate(task, 1000, frequency * 1000);
+    }
+
+    /**
+     * Start Recording Balances
+     *
+     * @param queue             the queue to add to, remove oldest data if necssary
+     * @param repository        the db repsoitory
+     * @param priorityRequested the requested thread priority
+     * @param frequency         the recording frequencies, in minutes
+     */
+    public static void startRecordingBalances(
+            final ConcurrentHashMap<Integer, List<AccountBalanceData>> balancesByHeight,
+            final ConcurrentHashMap<String, List<AccountBalanceData>> balancesByAddress,
+            int priorityRequested,
+            int frequency,
+            int capacity) {
+
+        Timer timer = buildTimer(BALANCE_RECORDER_TIMER, priorityRequested);
+
+        TimerTask task = new TimerTask() {
+            @Override
+            public void run() {
+
+                Thread.currentThread().setName(BALANCE_RECORDER_TIMER_TASK);
+
+                try (final HSQLDBRepository repository = (HSQLDBRepository) Controller.REPOSITORY_FACTORY.getRepository()) {
+                    while (balancesByHeight.size() > capacity + 1) {
+                        Optional<Integer> firstHeight = balancesByHeight.keySet().stream().sorted().findFirst();
+
+                        if (firstHeight.isPresent()) balancesByHeight.remove(firstHeight.get());
+                    }
+
+                    // get current balances
+                    List<AccountBalanceData> accountBalances = getAccountBalances(repository);
+
+                    // get anyone of the balances
+                    Optional<AccountBalanceData> data = accountBalances.stream().findAny();
+
+                    // if there are any balances, then record them
+                    if (data.isPresent()) {
+                        // map all new balances to the current height
+                        balancesByHeight.put(data.get().getHeight(), accountBalances);
+
+                        // for each new balance, map to address
+                        for (AccountBalanceData accountBalance : accountBalances) {
+
+                            // get recorded balances for this address
+                            List<AccountBalanceData> establishedBalances
+                                    = balancesByAddress.getOrDefault(accountBalance.getAddress(), new ArrayList<>(0));
+
+                            // start a new list of recordings for this address, add the new balance and add the established
+                            // balances
+                            List<AccountBalanceData> balances = new ArrayList<>(establishedBalances.size() + 1);
+                            balances.add(accountBalance);
+                            balances.addAll(establishedBalances);
+
+                            // reset tha balances for this address
+                            balancesByAddress.put(accountBalance.getAddress(), balances);
+
+                            // TODO: reduce account balances to capacity
+                        }
+
+                        // reduce height balances to capacity
+                        while( balancesByHeight.size() > capacity ) {
+                            Optional<Integer> lowestHeight
+                                = balancesByHeight.entrySet().stream()
+                                    .min(Comparator.comparingInt(Map.Entry::getKey))
+                                    .map(Map.Entry::getKey);
+
+                            if (lowestHeight.isPresent()) balancesByHeight.entrySet().remove(lowestHeight);
+                        }
+                    }
+                } catch (DataException e) {
+                    LOGGER.error(e.getMessage(), e);
+                }
+            }
+        };
+
+        // wait 5 minutes
+        timer.scheduleAtFixedRate(task, 300_000, frequency * 60_000);
+    }
+
+    /**
+     * Build Timer
+     *
+     * Build a timer for scheduling a timer task.
+     *
+     * @param name the name for the thread running the timer task
+     * @param priorityRequested the priority for the thread running the timer task
+     *
+     * @return a timer for scheduling a timer task
+     */
+    private static Timer buildTimer( final String name, int priorityRequested) {
         // ensure priority is in between 1-10
         final int priority = Math.max(0, Math.min(10, priorityRequested));
 
@@ -365,7 +484,7 @@ public class HSQLDBCacheUtils {
         Timer timer = new Timer(true) { // 'true' to make the Timer daemon
             @Override
             public void schedule(TimerTask task, long delay) {
-                Thread thread = new Thread(task) {
+                Thread thread = new Thread(task, name) {
                     @Override
                     public void run() {
                         this.setPriority(priority);
@@ -376,17 +495,7 @@ public class HSQLDBCacheUtils {
                 thread.start();
             }
         };
-
-        TimerTask task = new TimerTask() {
-            @Override
-            public void run() {
-
-                fillCache(ArbitraryResourceCache.getInstance(), respository);
-            }
-        };
-
-        // delay 1 second
-        timer.scheduleAtFixedRate(task, 1000, frequency * 1000);
+        return timer;
     }
 
     /**
@@ -541,4 +650,43 @@ public class HSQLDBCacheUtils {
 
         return resources;
     }
+
+    public static List<AccountBalanceData> getAccountBalances(HSQLDBRepository repository) {
+
+        StringBuilder sql = new StringBuilder();
+
+        sql.append("SELECT account, balance, height ");
+        sql.append("FROM ACCOUNTBALANCES as balances ");
+        sql.append("JOIN (SELECT height FROM BLOCKS ORDER BY height DESC LIMIT 1) AS max_height ON true ");
+        sql.append("WHERE asset_id=0");
+
+        List<AccountBalanceData> data = new ArrayList<>();
+
+        LOGGER.info( "Getting account balances ...");
+
+        try {
+            Statement statement = repository.connection.createStatement();
+
+            ResultSet resultSet = statement.executeQuery(sql.toString());
+
+            if (resultSet == null || !resultSet.next())
+                return new ArrayList<>(0);
+
+            do {
+                String account = resultSet.getString(1);
+                long balance = resultSet.getLong(2);
+                int height = resultSet.getInt(3);
+
+                data.add(new AccountBalanceData(account, ZERO, balance, height));
+            } while (resultSet.next());
+        } catch (SQLException e) {
+            LOGGER.warn(e.getMessage());
+        } catch (Exception e) {
+            LOGGER.error(e.getMessage(), e);
+        }
+
+        LOGGER.info("Retrieved account balances: count = " + data.size());
+
+        return data;
+    }
 }

src/main/java/org/qortal/repository/hsqldb/HSQLDBChatRepository.java

@@ -23,7 +23,7 @@ public class HSQLDBChatRepository implements ChatRepository {
 	public HSQLDBChatRepository(HSQLDBRepository repository) {
 		this.repository = repository;
 	}
-
+	
 	@Override
 	public List<ChatMessage> getMessagesMatchingCriteria(Long before, Long after, Integer txGroupId, byte[] referenceBytes,
 														 byte[] chatReferenceBytes, Boolean hasChatReference, List<String> involving, String senderAddress,
@@ -176,14 +176,14 @@ public class HSQLDBChatRepository implements ChatRepository {
 	}
 
 	@Override
-	public ActiveChats getActiveChats(String address, Encoding encoding) throws DataException {
-		List<GroupChat> groupChats = getActiveGroupChats(address, encoding);
-		List<DirectChat> directChats = getActiveDirectChats(address);
+	public ActiveChats getActiveChats(String address, Encoding encoding, Boolean hasChatReference) throws DataException {
+		List<GroupChat> groupChats = getActiveGroupChats(address, encoding, hasChatReference);
+		List<DirectChat> directChats = getActiveDirectChats(address, hasChatReference);
 
 		return new ActiveChats(groupChats, directChats);
 	}
-
-	private List<GroupChat> getActiveGroupChats(String address, Encoding encoding) throws DataException {
+	
+	private List<GroupChat> getActiveGroupChats(String address, Encoding encoding, Boolean hasChatReference) throws DataException {
 		// Find groups where address is a member and potential latest message details
 		String groupsSql = "SELECT group_id, group_name, latest_timestamp, sender, sender_name, signature, data "
 				+ "FROM GroupMembers "
@@ -194,11 +194,19 @@ public class HSQLDBChatRepository implements ChatRepository {
 					+ "JOIN Transactions USING (signature) "
 					+ "LEFT OUTER JOIN Names AS SenderNames ON SenderNames.owner = sender "
 					// NOTE: We need to qualify "Groups.group_id" here to avoid "General error" bug in HSQLDB v2.5.0
-					+ "WHERE tx_group_id = Groups.group_id AND type = " + TransactionType.CHAT.value + " "
-					+ "ORDER BY created_when DESC "
+					+ "WHERE tx_group_id = Groups.group_id AND type = " + TransactionType.CHAT.value + " ";
+
+					if (hasChatReference != null) {
+						if (hasChatReference) {
+							groupsSql += "AND chat_reference IS NOT NULL ";
+						} else {
+							groupsSql += "AND chat_reference IS NULL ";
+						}
+					}
+					groupsSql += "ORDER BY created_when DESC "
 					+ "LIMIT 1"
-				+ ") AS LatestMessages ON TRUE "
-				+ "WHERE address = ?";
+					+ ") AS LatestMessages ON TRUE "
+					+ "WHERE address = ?";
 
 		List<GroupChat> groupChats = new ArrayList<>();
 		try (ResultSet resultSet = this.repository.checkedExecute(groupsSql, address)) {
@@ -230,8 +238,16 @@ public class HSQLDBChatRepository implements ChatRepository {
 				+ "JOIN Transactions USING (signature) "
 				+ "LEFT OUTER JOIN Names AS SenderNames ON SenderNames.owner = sender "
 				+ "WHERE tx_group_id = 0 "
-				+ "AND recipient IS NULL "
-				+ "ORDER BY created_when DESC "
+				+ "AND recipient IS NULL ";
+
+				if (hasChatReference != null) {
+					if (hasChatReference) {
+						grouplessSql += "AND chat_reference IS NOT NULL ";
+					} else {
+						grouplessSql += "AND chat_reference IS NULL ";
+					}
+				}
+				grouplessSql += "ORDER BY created_when DESC "
 				+ "LIMIT 1";
 
 		try (ResultSet resultSet = this.repository.checkedExecute(grouplessSql)) {
@@ -259,7 +275,7 @@ public class HSQLDBChatRepository implements ChatRepository {
 		return groupChats;
 	}
 
-	private List<DirectChat> getActiveDirectChats(String address) throws DataException {
+	private List<DirectChat> getActiveDirectChats(String address, Boolean hasChatReference) throws DataException {
 		// Find chat messages involving address
 		String directSql = "SELECT other_address, name, latest_timestamp, sender, sender_name "
 				+ "FROM ("
@@ -275,11 +291,21 @@ public class HSQLDBChatRepository implements ChatRepository {
 					+ "NATURAL JOIN Transactions "
 					+ "LEFT OUTER JOIN Names AS SenderNames ON SenderNames.owner = sender "
 					+ "WHERE (sender = other_address AND recipient = ?) "
-					+ "OR (sender = ? AND recipient = other_address) "
-					+ "ORDER BY created_when DESC "
-					+ "LIMIT 1"
-				+ ") AS LatestMessages "
-				+ "LEFT OUTER JOIN Names ON owner = other_address";
+					+ "OR (sender = ? AND recipient = other_address) ";
+
+			    // Apply hasChatReference filter
+				if (hasChatReference != null) {
+					if (hasChatReference) {
+						directSql += "AND chat_reference IS NOT NULL ";
+					} else {
+						directSql += "AND chat_reference IS NULL ";
+					}
+				}
+			
+				directSql += "ORDER BY created_when DESC "
+						+ "LIMIT 1"
+						+ ") AS LatestMessages "
+						+ "LEFT OUTER JOIN Names ON owner = other_address";
 
 		Object[] bindParams = new Object[] { address, address, address, address };
 

src/main/java/org/qortal/repository/hsqldb/HSQLDBDatabaseUpdates.java

@@ -454,40 +454,41 @@ public class HSQLDBDatabaseUpdates {
 
 				case 12:
 					// Groups
-					stmt.execute("CREATE TABLE Groups (group_id GroupID, owner QortalAddress NOT NULL, group_name GroupName NOT NULL, "
+					// NOTE: We need to set Groups to `Groups` here to avoid SQL Standard Keywords in HSQLDB v2.7.4
+					stmt.execute("CREATE TABLE `Groups` (group_id GroupID, owner QortalAddress NOT NULL, group_name GroupName NOT NULL, "
 							+ "created_when EpochMillis NOT NULL, updated_when EpochMillis, is_open BOOLEAN NOT NULL, "
 							+ "approval_threshold TINYINT NOT NULL, min_block_delay INTEGER NOT NULL, max_block_delay INTEGER NOT NULL, "
 							+ "reference Signature, creation_group_id GroupID, reduced_group_name GroupName NOT NULL, "
 							+ "description GenericDescription NOT NULL, PRIMARY KEY (group_id))");
 					// For finding groups by name
-					stmt.execute("CREATE INDEX GroupNameIndex on Groups (group_name)");
+					stmt.execute("CREATE INDEX GroupNameIndex on `Groups` (group_name)");
 					// For finding groups by reduced name
-					stmt.execute("CREATE INDEX GroupReducedNameIndex on Groups (reduced_group_name)");
+					stmt.execute("CREATE INDEX GroupReducedNameIndex on `Groups` (reduced_group_name)");
 					// For finding groups by owner
-					stmt.execute("CREATE INDEX GroupOwnerIndex ON Groups (owner)");
+					stmt.execute("CREATE INDEX GroupOwnerIndex ON `Groups` (owner)");
 
 					// We need a corresponding trigger to make sure new group_id values are assigned sequentially starting from 1
-					stmt.execute("CREATE TRIGGER Group_ID_Trigger BEFORE INSERT ON Groups "
+					stmt.execute("CREATE TRIGGER Group_ID_Trigger BEFORE INSERT ON `Groups` "
 							+ "REFERENCING NEW ROW AS new_row FOR EACH ROW WHEN (new_row.group_id IS NULL) "
-							+ "SET new_row.group_id = (SELECT IFNULL(MAX(group_id) + 1, 1) FROM Groups)");
+							+ "SET new_row.group_id = (SELECT IFNULL(MAX(group_id) + 1, 1) FROM `Groups`)");
 
 					// Admins
 					stmt.execute("CREATE TABLE GroupAdmins (group_id GroupID, admin QortalAddress, reference Signature NOT NULL, "
-							+ "PRIMARY KEY (group_id, admin), FOREIGN KEY (group_id) REFERENCES Groups (group_id) ON DELETE CASCADE)");
+							+ "PRIMARY KEY (group_id, admin), FOREIGN KEY (group_id) REFERENCES `Groups` (group_id) ON DELETE CASCADE)");
 					// For finding groups by admin address
 					stmt.execute("CREATE INDEX GroupAdminIndex ON GroupAdmins (admin)");
 
 					// Members
 					stmt.execute("CREATE TABLE GroupMembers (group_id GroupID, address QortalAddress, "
 							+ "joined_when EpochMillis NOT NULL, reference Signature NOT NULL, "
-							+ "PRIMARY KEY (group_id, address), FOREIGN KEY (group_id) REFERENCES Groups (group_id) ON DELETE CASCADE)");
+							+ "PRIMARY KEY (group_id, address), FOREIGN KEY (group_id) REFERENCES `Groups` (group_id) ON DELETE CASCADE)");
 					// For finding groups by member address
 					stmt.execute("CREATE INDEX GroupMemberIndex ON GroupMembers (address)");
 
 					// Invites
 					stmt.execute("CREATE TABLE GroupInvites (group_id GroupID, inviter QortalAddress, invitee QortalAddress, "
 							+ "expires_when EpochMillis, reference Signature, "
-							+ "PRIMARY KEY (group_id, invitee), FOREIGN KEY (group_id) REFERENCES Groups (group_id) ON DELETE CASCADE)");
+							+ "PRIMARY KEY (group_id, invitee), FOREIGN KEY (group_id) REFERENCES `Groups` (group_id) ON DELETE CASCADE)");
 					// For finding invites sent by inviter
 					stmt.execute("CREATE INDEX GroupInviteInviterIndex ON GroupInvites (inviter)");
 					// For finding invites by group
@@ -503,7 +504,7 @@ public class HSQLDBDatabaseUpdates {
 					// NULL expires_when means does not expire!
 					stmt.execute("CREATE TABLE GroupBans (group_id GroupID, offender QortalAddress, admin QortalAddress NOT NULL, "
 							+ "banned_when EpochMillis NOT NULL, reason GenericDescription NOT NULL, expires_when EpochMillis, reference Signature NOT NULL, "
-							+ "PRIMARY KEY (group_id, offender), FOREIGN KEY (group_id) REFERENCES Groups (group_id) ON DELETE CASCADE)");
+							+ "PRIMARY KEY (group_id, offender), FOREIGN KEY (group_id) REFERENCES `Groups` (group_id) ON DELETE CASCADE)");
 					// For expiry maintenance
 					stmt.execute("CREATE INDEX GroupBanExpiryIndex ON GroupBans (expires_when)");
 					break;

src/main/java/org/qortal/settings/Settings.java

@@ -213,7 +213,7 @@ public class Settings {
 	public long recoveryModeTimeout = 9999999999999L;
 
 	/** Minimum peer version number required in order to sync with them */
-	private String minPeerVersion = "4.6.1";
+	private String minPeerVersion = "4.6.5";
 	/** Whether to allow connections with peers below minPeerVersion
 	 * If true, we won't sync with them but they can still sync with us, and will show in the peers list
 	 * If false, sync will be blocked both ways, and they will not appear in the peers list */
@@ -222,7 +222,7 @@ public class Settings {
 	/** Minimum time (in seconds) that we should attempt to remain connected to a peer for */
 	private int minPeerConnectionTime = 2 * 60 * 60; // seconds
 	/** Maximum time (in seconds) that we should attempt to remain connected to a peer for */
-	private int maxPeerConnectionTime = 4 * 60 * 60; // seconds
+	private int maxPeerConnectionTime = 6 * 60 * 60; // seconds
 	/** Maximum time (in seconds) that a peer should remain connected when requesting QDN data */
 	private int maxDataPeerConnectionTime = 30 * 60; // seconds
 
@@ -281,7 +281,10 @@ public class Settings {
 	// Auto-update sources
 	private String[] autoUpdateRepos = new String[] {
 		"https://github.com/Qortal/qortal/raw/%s/qortal.update",
-		"https://raw.githubusercontent.com@151.101.16.133/Qortal/qortal/%s/qortal.update"
+		"https://raw.githubusercontent.com@151.101.16.133/Qortal/qortal/%s/qortal.update",
+	    "https://qortal.link/Auto-Update/%s/qortal.update",
+	    "https://qortal.name/Auto-Update/%s/qortal.update",
+	    "https://update.qortal.org/Auto-Update/%s/qortal.update"
 	};
 
 	// Lists
@@ -441,6 +444,14 @@ public class Settings {
 	 */
 	private long archivingPause = 3000;
 
+	private boolean balanceRecorderEnabled = false;
+
+	private int balanceRecorderPriority = 1;
+
+	private int balanceRecorderFrequency = 2*60*1000;
+
+	private int balanceRecorderCapacity = 1000;
+
 	// Domain mapping
 	public static class ThreadLimit {
 		private String messageType;
@@ -1230,4 +1241,20 @@ public class Settings {
 	public long getArchivingPause() {
 		return archivingPause;
 	}
+
+	public int getBalanceRecorderPriority() {
+		return balanceRecorderPriority;
+	}
+
+	public int getBalanceRecorderFrequency() {
+		return balanceRecorderFrequency;
+	}
+
+	public int getBalanceRecorderCapacity() {
+		return balanceRecorderCapacity;
+	}
+
+	public boolean isBalanceRecorderEnabled() {
+		return balanceRecorderEnabled;
+	}
 }

src/main/java/org/qortal/transaction/RewardShareTransaction.java

@@ -123,7 +123,7 @@ public class RewardShareTransaction extends Transaction {
 		final boolean isCancellingSharePercent = this.rewardShareTransactionData.getSharePercent() < 0;
 
 		// Creator themselves needs to be allowed to mint (unless cancelling)
-		if (!isCancellingSharePercent && !creator.canMint())
+		if (!isCancellingSharePercent && !creator.canMint(false))
 			return ValidationResult.NOT_MINTING_ACCOUNT;
 
 		// Qortal: special rules in play depending whether recipient is also minter

src/main/resources/blockchain.json

@@ -112,7 +112,8 @@
 		"enableRewardshareHeight": 1905100,
 		"onlyMintWithNameHeight": 1900300,
 		"removeOnlyMintWithNameHeight": 1935500,
-		"groupMemberCheckHeight": 1902700
+		"groupMemberCheckHeight": 1902700,
+		"fixBatchRewardHeight": 1945900
 	},
 	"checkpoints": [
 		{ "height": 1136300, "signature": "3BbwawEF2uN8Ni5ofpJXkukoU8ctAPxYoFB7whq9pKfBnjfZcpfEJT4R95NvBDoTP8WDyWvsUvbfHbcr9qSZuYpSKZjUQTvdFf6eqznHGEwhZApWfvXu6zjGCxYCp65F4jsVYYJjkzbjmkCg5WAwN5voudngA23kMK6PpTNygapCzXt" }

src/main/resources/q-apps/q-apps.js

@@ -614,6 +614,7 @@ function getDefaultTimeout(action) {
         switch (action) {
             case "GET_USER_ACCOUNT":
             case "SAVE_FILE":
+            case "SIGN_TRANSACTION":
             case "DECRYPT_DATA":
                 // User may take a long time to accept/deny the popup
                 return 60 * 60 * 1000;
@@ -635,6 +636,11 @@ function getDefaultTimeout(action) {
                 // Chat messages rely on PoW computations, so allow extra time
                 return 60 * 1000;
 
+            case "CREATE_TRADE_BUY_ORDER":
+            case "CREATE_TRADE_SELL_ORDER":
+            case "CANCEL_TRADE_SELL_ORDER":
+            case "VOTE_ON_POLL":
+            case "CREATE_POLL":
             case "JOIN_GROUP":
             case "DEPLOY_AT":
             case "SEND_COIN":
@@ -649,7 +655,7 @@ function getDefaultTimeout(action) {
                 break;
         }
     }
-    return 10 * 1000;
+    return 30 * 1000;
 }
 
 /**

src/test/java/org/qortal/test/BlockArchiveV1Tests.java

@@ -54,26 +54,39 @@ public class BlockArchiveV1Tests extends Common {
 	public void testWriter() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testWriter");
+
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// 900 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(901);
 			repository.getATRepository().setAtTrimHeight(901);
+			System.out.println("Set trim heights to 901.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 900): " + maximumArchiveHeight);
 			assertEquals(900, maximumArchiveHeight);
 
 			// Write blocks 2-900 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 899)");
 			assertEquals(900 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -84,6 +97,9 @@ public class BlockArchiveV1Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
+
+			System.out.println("testWriter completed successfully.");
 		}
 	}
 
@@ -91,26 +107,39 @@ public class BlockArchiveV1Tests extends Common {
 	public void testWriterAndReader() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testWriterAndReader");
+
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// 900 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(901);
 			repository.getATRepository().setAtTrimHeight(901);
+			System.out.println("Set trim heights to 901.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 900): " + maximumArchiveHeight);
 			assertEquals(900, maximumArchiveHeight);
 
 			// Write blocks 2-900 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 899)");
 			assertEquals(900 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -121,8 +150,10 @@ public class BlockArchiveV1Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Read block 2 from the archive
+			System.out.println("Reading block 2 from the archive...");
 			BlockArchiveReader reader = BlockArchiveReader.getInstance();
 			BlockTransformation block2Info = reader.fetchBlockAtHeight(2);
 			BlockData block2ArchiveData = block2Info.getBlockData();
@@ -131,6 +162,7 @@ public class BlockArchiveV1Tests extends Common {
 			BlockData block2RepositoryData = repository.getBlockRepository().fromHeight(2);
 
 			// Ensure the values match
+			System.out.println("Comparing block 2 data...");
 			assertEquals(block2ArchiveData.getHeight(), block2RepositoryData.getHeight());
 			assertArrayEquals(block2ArchiveData.getSignature(), block2RepositoryData.getSignature());
 
@@ -138,6 +170,7 @@ public class BlockArchiveV1Tests extends Common {
 			assertEquals(1, block2ArchiveData.getOnlineAccountsCount());
 
 			// Read block 900 from the archive
+			System.out.println("Reading block 900 from the archive...");
 			BlockTransformation block900Info = reader.fetchBlockAtHeight(900);
 			BlockData block900ArchiveData = block900Info.getBlockData();
 
@@ -145,12 +178,14 @@ public class BlockArchiveV1Tests extends Common {
 			BlockData block900RepositoryData = repository.getBlockRepository().fromHeight(900);
 
 			// Ensure the values match
+			System.out.println("Comparing block 900 data...");
 			assertEquals(block900ArchiveData.getHeight(), block900RepositoryData.getHeight());
 			assertArrayEquals(block900ArchiveData.getSignature(), block900RepositoryData.getSignature());
 
 			// Test some values in the archive
 			assertEquals(1, block900ArchiveData.getOnlineAccountsCount());
 
+			System.out.println("testWriterAndReader completed successfully.");
 		}
 	}
 
@@ -158,33 +193,48 @@ public class BlockArchiveV1Tests extends Common {
 	public void testArchivedAtStates() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testArchivedAtStates");
+
 			// Deploy an AT so that we have AT state data
+			System.out.println("Deploying AT...");
 			PrivateKeyAccount deployer = Common.getTestAccount(repository, "alice");
 			byte[] creationBytes = AtUtils.buildSimpleAT();
 			long fundingAmount = 1_00000000L;
 			DeployAtTransaction deployAtTransaction =  AtUtils.doDeployAT(repository, deployer, creationBytes, fundingAmount);
 			String atAddress = deployAtTransaction.getATAccount().getAddress();
+			System.out.println("AT deployed at address: " + atAddress);
 
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// 9 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(10);
 			repository.getATRepository().setAtTrimHeight(10);
+			System.out.println("Set trim heights to 10.");
 
 			// Check the max archive height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 9): " + maximumArchiveHeight);
 			assertEquals(9, maximumArchiveHeight);
 
 			// Write blocks 2-9 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 8)");
 			assertEquals(9 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -195,10 +245,13 @@ public class BlockArchiveV1Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Check blocks 3-9
+			System.out.println("Checking blocks 3 to 9...");
 			for (Integer testHeight = 2; testHeight <= 9; testHeight++) {
 
+				System.out.println("Reading block " + testHeight + " from the archive...");
 				// Read a block from the archive
 				BlockArchiveReader reader = BlockArchiveReader.getInstance();
 				BlockTransformation blockInfo = reader.fetchBlockAtHeight(testHeight);
@@ -216,6 +269,7 @@ public class BlockArchiveV1Tests extends Common {
 
 				// Check the archived AT state
 				if (testHeight == 2) {
+					System.out.println("Checking block " + testHeight + " AT state data (expected null)...");
 					// Block 2 won't have an AT state hash because it's initial (and has the DEPLOY_AT in the same block)
 					assertNull(archivedAtStateData);
 
@@ -223,6 +277,7 @@ public class BlockArchiveV1Tests extends Common {
 					assertEquals(Transaction.TransactionType.DEPLOY_AT, archivedTransactions.get(0).getType());
 				}
 				else {
+					System.out.println("Checking block " + testHeight + " AT state data...");
 					// For blocks 3+, ensure the archive has the AT state data, but not the hashes
 					assertNotNull(archivedAtStateData.getStateHash());
 					assertNull(archivedAtStateData.getStateData());
@@ -255,10 +310,12 @@ public class BlockArchiveV1Tests extends Common {
 			}
 
 			// Check block 10 (unarchived)
+			System.out.println("Checking block 10 (should not be in archive)...");
 			BlockArchiveReader reader = BlockArchiveReader.getInstance();
 			BlockTransformation blockInfo = reader.fetchBlockAtHeight(10);
 			assertNull(blockInfo);
 
+			System.out.println("testArchivedAtStates completed successfully.");
 		}
 
 	}
@@ -267,32 +324,46 @@ public class BlockArchiveV1Tests extends Common {
 	public void testArchiveAndPrune() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testArchiveAndPrune");
+
 			// Deploy an AT so that we have AT state data
+			System.out.println("Deploying AT...");
 			PrivateKeyAccount deployer = Common.getTestAccount(repository, "alice");
 			byte[] creationBytes = AtUtils.buildSimpleAT();
 			long fundingAmount = 1_00000000L;
 			AtUtils.doDeployAT(repository, deployer, creationBytes, fundingAmount);
 
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// Assume 900 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(901);
 			repository.getATRepository().setAtTrimHeight(901);
+			System.out.println("Set trim heights to 901.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 900): " + maximumArchiveHeight);
 			assertEquals(900, maximumArchiveHeight);
 
 			// Write blocks 2-900 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 899)");
 			assertEquals(900 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -303,17 +374,21 @@ public class BlockArchiveV1Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Ensure the SQL repository contains blocks 2 and 900...
 			assertNotNull(repository.getBlockRepository().fromHeight(2));
 			assertNotNull(repository.getBlockRepository().fromHeight(900));
+			System.out.println("Blocks 2 and 900 exist in the repository.");
 
 			// Prune all the archived blocks
+			System.out.println("Pruning blocks 2 to 900...");
 			int numBlocksPruned = repository.getBlockRepository().pruneBlocks(0, 900);
 			assertEquals(900-1, numBlocksPruned);
 			repository.getBlockRepository().setBlockPruneHeight(901);
 
 			// Prune the AT states for the archived blocks
+			System.out.println("Pruning AT states up to height 900...");
 			repository.getATRepository().rebuildLatestAtStates(900);
 			repository.saveChanges();
 			int numATStatesPruned = repository.getATRepository().pruneAtStates(0, 900);
@@ -323,14 +398,19 @@ public class BlockArchiveV1Tests extends Common {
 			// Now ensure the SQL repository is missing blocks 2 and 900...
 			assertNull(repository.getBlockRepository().fromHeight(2));
 			assertNull(repository.getBlockRepository().fromHeight(900));
+			System.out.println("Blocks 2 and 900 have been pruned from the repository.");
 
 			// ... but it's not missing blocks 1 and 901 (we don't prune the genesis block)
 			assertNotNull(repository.getBlockRepository().fromHeight(1));
 			assertNotNull(repository.getBlockRepository().fromHeight(901));
+			System.out.println("Blocks 1 and 901 still exist in the repository.");
 
 			// Validate the latest block height in the repository
-			assertEquals(1002, (int) repository.getBlockRepository().getLastBlock().getHeight());
+			int lastBlockHeight = repository.getBlockRepository().getLastBlock().getHeight();
+			System.out.println("Latest block height in repository (Expected 1002): " + lastBlockHeight);
+			assertEquals(1002, lastBlockHeight);
 
+			System.out.println("testArchiveAndPrune completed successfully.");
 		}
 	}
 
@@ -338,137 +418,190 @@ public class BlockArchiveV1Tests extends Common {
 	public void testTrimArchivePruneAndOrphan() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testTrimArchivePruneAndOrphan");
+
 			// Deploy an AT so that we have AT state data
+			System.out.println("Deploying AT...");
 			PrivateKeyAccount deployer = Common.getTestAccount(repository, "alice");
 			byte[] creationBytes = AtUtils.buildSimpleAT();
 			long fundingAmount = 1_00000000L;
 			AtUtils.doDeployAT(repository, deployer, creationBytes, fundingAmount);
+			System.out.println("AT deployed successfully.");
 
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// Make sure that block 500 has full AT state data and data hash
+			System.out.println("Verifying block 500 AT state data...");
 			List<ATStateData> block500AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(500);
 			ATStateData atStatesData = repository.getATRepository().getATStateAtHeight(block500AtStatesData.get(0).getATAddress(), 500);
 			assertNotNull(atStatesData.getStateHash());
 			assertNotNull(atStatesData.getStateData());
+			System.out.println("Block 500 AT state data verified.");
 
 			// Trim the first 500 blocks
+			System.out.println("Trimming first 500 blocks...");
 			repository.getBlockRepository().trimOldOnlineAccountsSignatures(0, 500);
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(501);
 			repository.getATRepository().rebuildLatestAtStates(500);
 			repository.getATRepository().trimAtStates(0, 500, 1000);
 			repository.getATRepository().setAtTrimHeight(501);
+			System.out.println("Trimming completed.");
 
 			// Now block 499 should only have the AT state data hash
+			System.out.println("Checking block 499 AT state data...");
 			List<ATStateData> block499AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(499);
 			atStatesData = repository.getATRepository().getATStateAtHeight(block499AtStatesData.get(0).getATAddress(), 499);
 			assertNotNull(atStatesData.getStateHash());
 			assertNull(atStatesData.getStateData());
+			System.out.println("Block 499 AT state data contains only state hash as expected.");
 
 			// ... but block 500 should have the full data (due to being retained as the "latest" AT state in the trimmed range
+			System.out.println("Verifying block 500 AT state data again...");
 			block500AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(500);
 			atStatesData = repository.getATRepository().getATStateAtHeight(block500AtStatesData.get(0).getATAddress(), 500);
 			assertNotNull(atStatesData.getStateHash());
 			assertNotNull(atStatesData.getStateData());
+			System.out.println("Block 500 AT state data contains full data.");
 
 			// ... and block 501 should also have the full data
+			System.out.println("Verifying block 501 AT state data...");
 			List<ATStateData> block501AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(501);
 			atStatesData = repository.getATRepository().getATStateAtHeight(block501AtStatesData.get(0).getATAddress(), 501);
 			assertNotNull(atStatesData.getStateHash());
 			assertNotNull(atStatesData.getStateData());
+			System.out.println("Block 501 AT state data contains full data.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height determined (Expected 500): " + maximumArchiveHeight);
 			assertEquals(500, maximumArchiveHeight);
 
 			BlockData block3DataPreArchive = repository.getBlockRepository().fromHeight(3);
 
 			// Write blocks 2-500 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Number of blocks written to archive (Expected 499): " + writer.getWrittenCount());
 			assertEquals(500 - 1, writer.getWrittenCount()); // -1 for the genesis block
 
 			// Increment block archive height
 			repository.getBlockArchiveRepository().setBlockArchiveHeight(writer.getWrittenCount());
 			repository.saveChanges();
 			assertEquals(500 - 1, repository.getBlockArchiveRepository().getBlockArchiveHeight());
+			System.out.println("Block archive height updated to: " + (500 - 1));
 
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Ensure the SQL repository contains blocks 2 and 500...
+			System.out.println("Verifying that blocks 2 and 500 exist in the repository...");
 			assertNotNull(repository.getBlockRepository().fromHeight(2));
 			assertNotNull(repository.getBlockRepository().fromHeight(500));
+			System.out.println("Blocks 2 and 500 are present in the repository.");
 
 			// Prune all the archived blocks
+			System.out.println("Pruning blocks 2 to 500...");
 			int numBlocksPruned = repository.getBlockRepository().pruneBlocks(0, 500);
+			System.out.println("Number of blocks pruned (Expected 499): " + numBlocksPruned);
 			assertEquals(500-1, numBlocksPruned);
 			repository.getBlockRepository().setBlockPruneHeight(501);
 
 			// Prune the AT states for the archived blocks
+			System.out.println("Pruning AT states up to height 500...");
 			repository.getATRepository().rebuildLatestAtStates(500);
 			repository.saveChanges();
 			int numATStatesPruned = repository.getATRepository().pruneAtStates(2, 500);
+			System.out.println("Number of AT states pruned (Expected 498): " + numATStatesPruned);
 			assertEquals(498, numATStatesPruned); // Minus 1 for genesis block, and another for the latest AT state
 			repository.getATRepository().setAtPruneHeight(501);
 
 			// Now ensure the SQL repository is missing blocks 2 and 500...
+			System.out.println("Verifying that blocks 2 and 500 have been pruned...");
 			assertNull(repository.getBlockRepository().fromHeight(2));
 			assertNull(repository.getBlockRepository().fromHeight(500));
+			System.out.println("Blocks 2 and 500 have been successfully pruned.");
 
 			// ... but it's not missing blocks 1 and 501 (we don't prune the genesis block)
+			System.out.println("Verifying that blocks 1 and 501 still exist...");
 			assertNotNull(repository.getBlockRepository().fromHeight(1));
 			assertNotNull(repository.getBlockRepository().fromHeight(501));
+			System.out.println("Blocks 1 and 501 are present in the repository.");
 
 			// Validate the latest block height in the repository
-			assertEquals(1002, (int) repository.getBlockRepository().getLastBlock().getHeight());
+			int lastBlockHeight = repository.getBlockRepository().getLastBlock().getHeight();
+			System.out.println("Latest block height in repository (Expected 1002): " + lastBlockHeight);
+			assertEquals(1002, lastBlockHeight);
 
 			// Now orphan some unarchived blocks.
+			System.out.println("Orphaning 500 blocks...");
 			BlockUtils.orphanBlocks(repository, 500);
-			assertEquals(502, (int) repository.getBlockRepository().getLastBlock().getHeight());
+			int currentLastBlockHeight = repository.getBlockRepository().getLastBlock().getHeight();
+			System.out.println("New last block height after orphaning (Expected 502): " + currentLastBlockHeight);
+			assertEquals(502, currentLastBlockHeight);
 
 			// We're close to the lower limit of the SQL database now, so
 			// we need to import some blocks from the archive
+			System.out.println("Importing blocks 401 to 500 from the archive...");
 			BlockArchiveUtils.importFromArchive(401, 500, repository);
 
 			// Ensure the SQL repository now contains block 401 but not 400...
+			System.out.println("Verifying that block 401 exists and block 400 does not...");
 			assertNotNull(repository.getBlockRepository().fromHeight(401));
 			assertNull(repository.getBlockRepository().fromHeight(400));
+			System.out.println("Block 401 exists, block 400 does not.");
 
 			// Import the remaining 399 blocks
+			System.out.println("Importing blocks 2 to 400 from the archive...");
 			BlockArchiveUtils.importFromArchive(2, 400, repository);
 
 			// Verify that block 3 matches the original
+			System.out.println("Verifying that block 3 matches the original data...");
 			BlockData block3DataPostArchive = repository.getBlockRepository().fromHeight(3);
 			assertArrayEquals(block3DataPreArchive.getSignature(), block3DataPostArchive.getSignature());
 			assertEquals(block3DataPreArchive.getHeight(), block3DataPostArchive.getHeight());
+			System.out.println("Block 3 data matches the original.");
 
 			// Orphan 1 more block, which should be the last one that is possible to be orphaned
+			System.out.println("Orphaning 1 more block...");
 			BlockUtils.orphanBlocks(repository, 1);
+			System.out.println("Orphaned 1 block successfully.");
 
 			// Orphan another block, which should fail
+			System.out.println("Attempting to orphan another block, which should fail...");
 			Exception exception = null;
 			try {
 				BlockUtils.orphanBlocks(repository, 1);
 			} catch (DataException e) {
 				exception = e;
+				System.out.println("Caught expected DataException: " + e.getMessage());
 			}
 
 			// Ensure that a DataException is thrown because there is no more AT states data available
 			assertNotNull(exception);
 			assertEquals(DataException.class, exception.getClass());
+			System.out.println("DataException confirmed due to lack of AT states data.");
 
 			// FUTURE: we may be able to retain unique AT states when trimming, to avoid this exception
 			// and allow orphaning back through blocks with trimmed AT states.
 
+			System.out.println("testTrimArchivePruneAndOrphan completed successfully.");
 		}
 	}
 
@@ -482,16 +615,26 @@ public class BlockArchiveV1Tests extends Common {
 	public void testMissingAtStatesHeightIndex() throws DataException, SQLException {
 		try (final HSQLDBRepository repository = (HSQLDBRepository) RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testMissingAtStatesHeightIndex");
+
 			// Firstly check that we're able to prune or archive when the index exists
+			System.out.println("Checking existence of ATStatesHeightIndex...");
 			assertTrue(repository.getATRepository().hasAtStatesHeightIndex());
 			assertTrue(RepositoryManager.canArchiveOrPrune());
+			System.out.println("ATStatesHeightIndex exists. Archiving and pruning are possible.");
 
 			// Delete the index
+			System.out.println("Dropping ATStatesHeightIndex...");
 			repository.prepareStatement("DROP INDEX ATSTATESHEIGHTINDEX").execute();
+			System.out.println("ATStatesHeightIndex dropped.");
 
 			// Ensure check that we're unable to prune or archive when the index doesn't exist
+			System.out.println("Verifying that ATStatesHeightIndex no longer exists...");
 			assertFalse(repository.getATRepository().hasAtStatesHeightIndex());
 			assertFalse(RepositoryManager.canArchiveOrPrune());
+			System.out.println("ATStatesHeightIndex does not exist. Archiving and pruning are disabled.");
+
+			System.out.println("testMissingAtStatesHeightIndex completed successfully.");
 		}
 	}
 
@@ -501,8 +644,10 @@ public class BlockArchiveV1Tests extends Common {
 		Path archivePath = Paths.get(Settings.getInstance().getRepositoryPath(), "archive").toAbsolutePath();
 		try {
 			FileUtils.deleteDirectory(archivePath.toFile());
+			System.out.println("Deleted archive directory at: " + archivePath);
 		} catch (IOException e) {
-
+			
+			System.out.println("Failed to delete archive directory: " + e.getMessage());
 		}
 	}
 

src/test/java/org/qortal/test/BlockArchiveV2Tests.java

@@ -54,26 +54,39 @@ public class BlockArchiveV2Tests extends Common {
 	public void testWriter() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testWriter");
+
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// 900 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(901);
 			repository.getATRepository().setAtTrimHeight(901);
+			System.out.println("Set trim heights to 901.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 900): " + maximumArchiveHeight);
 			assertEquals(900, maximumArchiveHeight);
 
 			// Write blocks 2-900 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 899)");
 			assertEquals(900 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -84,6 +97,9 @@ public class BlockArchiveV2Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
+
+			System.out.println("testWriter completed successfully.");
 		}
 	}
 
@@ -91,26 +107,39 @@ public class BlockArchiveV2Tests extends Common {
 	public void testWriterAndReader() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testWriterAndReader");
+
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// 900 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(901);
 			repository.getATRepository().setAtTrimHeight(901);
+			System.out.println("Set trim heights to 901.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 900): " + maximumArchiveHeight);
 			assertEquals(900, maximumArchiveHeight);
 
 			// Write blocks 2-900 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 899)");
 			assertEquals(900 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -121,8 +150,10 @@ public class BlockArchiveV2Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Read block 2 from the archive
+			System.out.println("Reading block 2 from the archive...");
 			BlockArchiveReader reader = BlockArchiveReader.getInstance();
 			BlockTransformation block2Info = reader.fetchBlockAtHeight(2);
 			BlockData block2ArchiveData = block2Info.getBlockData();
@@ -131,6 +162,7 @@ public class BlockArchiveV2Tests extends Common {
 			BlockData block2RepositoryData = repository.getBlockRepository().fromHeight(2);
 
 			// Ensure the values match
+			System.out.println("Comparing block 2 data...");
 			assertEquals(block2ArchiveData.getHeight(), block2RepositoryData.getHeight());
 			assertArrayEquals(block2ArchiveData.getSignature(), block2RepositoryData.getSignature());
 
@@ -138,6 +170,7 @@ public class BlockArchiveV2Tests extends Common {
 			assertEquals(1, block2ArchiveData.getOnlineAccountsCount());
 
 			// Read block 900 from the archive
+			System.out.println("Reading block 900 from the archive...");
 			BlockTransformation block900Info = reader.fetchBlockAtHeight(900);
 			BlockData block900ArchiveData = block900Info.getBlockData();
 
@@ -145,12 +178,14 @@ public class BlockArchiveV2Tests extends Common {
 			BlockData block900RepositoryData = repository.getBlockRepository().fromHeight(900);
 
 			// Ensure the values match
+			System.out.println("Comparing block 900 data...");
 			assertEquals(block900ArchiveData.getHeight(), block900RepositoryData.getHeight());
 			assertArrayEquals(block900ArchiveData.getSignature(), block900RepositoryData.getSignature());
 
 			// Test some values in the archive
 			assertEquals(1, block900ArchiveData.getOnlineAccountsCount());
 
+			System.out.println("testWriterAndReader completed successfully.");
 		}
 	}
 
@@ -158,47 +193,66 @@ public class BlockArchiveV2Tests extends Common {
 	public void testArchivedAtStates() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testArchivedAtStates");
+
 			// Deploy an AT so that we have AT state data
+			System.out.println("Deploying AT...");
 			PrivateKeyAccount deployer = Common.getTestAccount(repository, "alice");
 			byte[] creationBytes = AtUtils.buildSimpleAT();
 			long fundingAmount = 1_00000000L;
 			DeployAtTransaction deployAtTransaction =  AtUtils.doDeployAT(repository, deployer, creationBytes, fundingAmount);
 			String atAddress = deployAtTransaction.getATAccount().getAddress();
+			System.out.println("AT deployed at address: " + atAddress);
 
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// 9 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(10);
 			repository.getATRepository().setAtTrimHeight(10);
+			System.out.println("Set trim heights to 10.");
 
 			// Check the max archive height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 9): " + maximumArchiveHeight);
 			assertEquals(9, maximumArchiveHeight);
 
 			// Write blocks 2-9 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 8)");
 			assertEquals(9 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
 			repository.getBlockArchiveRepository().setBlockArchiveHeight(writer.getWrittenCount());
 			repository.saveChanges();
 			assertEquals(9 - 1, repository.getBlockArchiveRepository().getBlockArchiveHeight());
+			System.out.println("Block archive height updated to: " + (9 - 1));
 
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Check blocks 3-9
+			System.out.println("Checking blocks 2 to 9...");
 			for (Integer testHeight = 2; testHeight <= 9; testHeight++) {
 
+				System.out.println("Reading block " + testHeight + " from the archive...");
 				// Read a block from the archive
 				BlockArchiveReader reader = BlockArchiveReader.getInstance();
 				BlockTransformation blockInfo = reader.fetchBlockAtHeight(testHeight);
@@ -216,15 +270,18 @@ public class BlockArchiveV2Tests extends Common {
 
 				// Check the archived AT state
 				if (testHeight == 2) {
+					System.out.println("Checking block " + testHeight + " AT state data (expected transactions)...");
 					assertEquals(1, archivedTransactions.size());
 					assertEquals(Transaction.TransactionType.DEPLOY_AT, archivedTransactions.get(0).getType());
 				}
 				else {
+					System.out.println("Checking block " + testHeight + " AT state data (no transactions expected)...");
 					// Blocks 3+ shouldn't have any transactions
 					assertTrue(archivedTransactions.isEmpty());
 				}
 
 				// Ensure the archive has the AT states hash
+				System.out.println("Checking block " + testHeight + " AT states hash...");
 				assertNotNull(archivedAtStateHash);
 
 				// Also check the online accounts count and height
@@ -232,6 +289,7 @@ public class BlockArchiveV2Tests extends Common {
 				assertEquals(testHeight, archivedBlockData.getHeight());
 
 				// Ensure the values match
+				System.out.println("Comparing block " + testHeight + " data...");
 				assertEquals(archivedBlockData.getHeight(), repositoryBlockData.getHeight());
 				assertArrayEquals(archivedBlockData.getSignature(), repositoryBlockData.getSignature());
 				assertEquals(archivedBlockData.getOnlineAccountsCount(), repositoryBlockData.getOnlineAccountsCount());
@@ -249,10 +307,12 @@ public class BlockArchiveV2Tests extends Common {
 			}
 
 			// Check block 10 (unarchived)
+			System.out.println("Checking block 10 (should not be in archive)...");
 			BlockArchiveReader reader = BlockArchiveReader.getInstance();
 			BlockTransformation blockInfo = reader.fetchBlockAtHeight(10);
 			assertNull(blockInfo);
 
+			System.out.println("testArchivedAtStates completed successfully.");
 		}
 
 	}
@@ -261,32 +321,47 @@ public class BlockArchiveV2Tests extends Common {
 	public void testArchiveAndPrune() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testArchiveAndPrune");
+
 			// Deploy an AT so that we have AT state data
+			System.out.println("Deploying AT...");
 			PrivateKeyAccount deployer = Common.getTestAccount(repository, "alice");
 			byte[] creationBytes = AtUtils.buildSimpleAT();
 			long fundingAmount = 1_00000000L;
 			AtUtils.doDeployAT(repository, deployer, creationBytes, fundingAmount);
+			System.out.println("AT deployed successfully.");
 
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// Assume 900 blocks are trimmed (this specifies the first untrimmed height)
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(901);
 			repository.getATRepository().setAtTrimHeight(901);
+			System.out.println("Set trim heights to 901.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height (Expected 900): " + maximumArchiveHeight);
 			assertEquals(900, maximumArchiveHeight);
 
 			// Write blocks 2-900 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Archive contains " + writer.getWrittenCount() + " blocks. (Expected 899)");
 			assertEquals(900 - 1, writer.getWrittenCount());
 
 			// Increment block archive height
@@ -297,34 +372,48 @@ public class BlockArchiveV2Tests extends Common {
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Ensure the SQL repository contains blocks 2 and 900...
+			System.out.println("Verifying that blocks 2 and 900 exist in the repository...");
 			assertNotNull(repository.getBlockRepository().fromHeight(2));
 			assertNotNull(repository.getBlockRepository().fromHeight(900));
+			System.out.println("Blocks 2 and 900 are present in the repository.");
 
 			// Prune all the archived blocks
+			System.out.println("Pruning blocks 2 to 900...");
 			int numBlocksPruned = repository.getBlockRepository().pruneBlocks(0, 900);
+			System.out.println("Number of blocks pruned (Expected 899): " + numBlocksPruned);
 			assertEquals(900-1, numBlocksPruned);
 			repository.getBlockRepository().setBlockPruneHeight(901);
 
 			// Prune the AT states for the archived blocks
+			System.out.println("Pruning AT states up to height 900...");
 			repository.getATRepository().rebuildLatestAtStates(900);
 			repository.saveChanges();
 			int numATStatesPruned = repository.getATRepository().pruneAtStates(0, 900);
+			System.out.println("Number of AT states pruned (Expected 898): " + numATStatesPruned);
 			assertEquals(900-2, numATStatesPruned); // Minus 1 for genesis block, and another for the latest AT state
 			repository.getATRepository().setAtPruneHeight(901);
 
 			// Now ensure the SQL repository is missing blocks 2 and 900...
+			System.out.println("Verifying that blocks 2 and 900 have been pruned...");
 			assertNull(repository.getBlockRepository().fromHeight(2));
 			assertNull(repository.getBlockRepository().fromHeight(900));
+			System.out.println("Blocks 2 and 900 have been successfully pruned.");
 
 			// ... but it's not missing blocks 1 and 901 (we don't prune the genesis block)
+			System.out.println("Verifying that blocks 1 and 901 still exist...");
 			assertNotNull(repository.getBlockRepository().fromHeight(1));
 			assertNotNull(repository.getBlockRepository().fromHeight(901));
+			System.out.println("Blocks 1 and 901 are present in the repository.");
 
 			// Validate the latest block height in the repository
-			assertEquals(1002, (int) repository.getBlockRepository().getLastBlock().getHeight());
+			int lastBlockHeight = repository.getBlockRepository().getLastBlock().getHeight();
+			System.out.println("Latest block height in repository (Expected 1002): " + lastBlockHeight);
+			assertEquals(1002, lastBlockHeight);
 
+			System.out.println("testArchiveAndPrune completed successfully.");
 		}
 	}
 
@@ -332,138 +421,191 @@ public class BlockArchiveV2Tests extends Common {
 	public void testTrimArchivePruneAndOrphan() throws DataException, InterruptedException, TransformationException, IOException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testTrimArchivePruneAndOrphan");
+
 			// Deploy an AT so that we have AT state data
+			System.out.println("Deploying AT...");
 			PrivateKeyAccount deployer = Common.getTestAccount(repository, "alice");
 			byte[] creationBytes = AtUtils.buildSimpleAT();
 			long fundingAmount = 1_00000000L;
 			AtUtils.doDeployAT(repository, deployer, creationBytes, fundingAmount);
+			System.out.println("AT deployed successfully.");
 
 			// Mint some blocks so that we are able to archive them later
+			System.out.println("Minting 1000 blocks...");
 			for (int i = 0; i < 1000; i++) {
 				BlockMinter.mintTestingBlock(repository, Common.getTestAccount(repository, "alice-reward-share"));
+				// Log every 100 blocks
+				if ((i + 1) % 100 == 0) {
+					System.out.println("Minted block " + (i + 1));
+				}
 			}
+			System.out.println("Finished minting blocks.");
 
 			// Make sure that block 500 has full AT state data and data hash
+			System.out.println("Verifying block 500 AT state data...");
 			List<ATStateData> block500AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(500);
 			ATStateData atStatesData = repository.getATRepository().getATStateAtHeight(block500AtStatesData.get(0).getATAddress(), 500);
 			assertNotNull(atStatesData.getStateHash());
 			assertNotNull(atStatesData.getStateData());
+			System.out.println("Block 500 AT state data verified.");
 
 			// Trim the first 500 blocks
+			System.out.println("Trimming first 500 blocks...");
 			repository.getBlockRepository().trimOldOnlineAccountsSignatures(0, 500);
 			repository.getBlockRepository().setOnlineAccountsSignaturesTrimHeight(501);
 			repository.getATRepository().rebuildLatestAtStates(500);
 			repository.getATRepository().trimAtStates(0, 500, 1000);
 			repository.getATRepository().setAtTrimHeight(501);
+			System.out.println("Trimming completed.");
 
 			// Now block 499 should only have the AT state data hash
+			System.out.println("Checking block 499 AT state data...");
 			List<ATStateData> block499AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(499);
 			atStatesData = repository.getATRepository().getATStateAtHeight(block499AtStatesData.get(0).getATAddress(), 499);
 			assertNotNull(atStatesData.getStateHash());
 			assertNull(atStatesData.getStateData());
+			System.out.println("Block 499 AT state data contains only state hash as expected.");
 
 			// ... but block 500 should have the full data (due to being retained as the "latest" AT state in the trimmed range
+			System.out.println("Verifying block 500 AT state data again...");
 			block500AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(500);
 			atStatesData = repository.getATRepository().getATStateAtHeight(block500AtStatesData.get(0).getATAddress(), 500);
 			assertNotNull(atStatesData.getStateHash());
 			assertNotNull(atStatesData.getStateData());
+			System.out.println("Block 500 AT state data contains full data.");
 
 			// ... and block 501 should also have the full data
+			System.out.println("Verifying block 501 AT state data...");
 			List<ATStateData> block501AtStatesData = repository.getATRepository().getBlockATStatesAtHeight(501);
 			atStatesData = repository.getATRepository().getATStateAtHeight(block501AtStatesData.get(0).getATAddress(), 501);
 			assertNotNull(atStatesData.getStateHash());
 			assertNotNull(atStatesData.getStateData());
+			System.out.println("Block 501 AT state data contains full data.");
 
 			// Check the max archive height - this should be one less than the first untrimmed height
 			final int maximumArchiveHeight = BlockArchiveWriter.getMaxArchiveHeight(repository);
+			System.out.println("Maximum archive height determined (Expected 500): " + maximumArchiveHeight);
 			assertEquals(500, maximumArchiveHeight);
 
 			BlockData block3DataPreArchive = repository.getBlockRepository().fromHeight(3);
 
 			// Write blocks 2-500 to the archive
+			System.out.println("Writing blocks 2 to " + maximumArchiveHeight + " to the archive...");
 			BlockArchiveWriter writer = new BlockArchiveWriter(0, maximumArchiveHeight, repository);
 			writer.setShouldEnforceFileSizeTarget(false); // To avoid the need to pre-calculate file sizes
 			BlockArchiveWriter.BlockArchiveWriteResult result = writer.write();
+			System.out.println("Finished writing blocks to archive. Result: " + result);
 			assertEquals(BlockArchiveWriter.BlockArchiveWriteResult.OK, result);
 
 			// Make sure that the archive contains the correct number of blocks
+			System.out.println("Number of blocks written to archive (Expected 499): " + writer.getWrittenCount());
 			assertEquals(500 - 1, writer.getWrittenCount()); // -1 for the genesis block
 
 			// Increment block archive height
 			repository.getBlockArchiveRepository().setBlockArchiveHeight(writer.getWrittenCount());
 			repository.saveChanges();
 			assertEquals(500 - 1, repository.getBlockArchiveRepository().getBlockArchiveHeight());
+			System.out.println("Block archive height updated to: " + (500 - 1));
 
 			// Ensure the file exists
 			File outputFile = writer.getOutputPath().toFile();
 			assertTrue(outputFile.exists());
+			System.out.println("Archive file exists at: " + outputFile.getAbsolutePath());
 
 			// Ensure the SQL repository contains blocks 2 and 500...
+			System.out.println("Verifying that blocks 2 and 500 exist in the repository...");
 			assertNotNull(repository.getBlockRepository().fromHeight(2));
 			assertNotNull(repository.getBlockRepository().fromHeight(500));
+			System.out.println("Blocks 2 and 500 are present in the repository.");
 
 			// Prune all the archived blocks
+			System.out.println("Pruning blocks 2 to 500...");
 			int numBlocksPruned = repository.getBlockRepository().pruneBlocks(0, 500);
+			System.out.println("Number of blocks pruned (Expected 499): " + numBlocksPruned);
 			assertEquals(500-1, numBlocksPruned);
 			repository.getBlockRepository().setBlockPruneHeight(501);
 
 			// Prune the AT states for the archived blocks
+			System.out.println("Pruning AT states up to height 500...");
 			repository.getATRepository().rebuildLatestAtStates(500);
 			repository.saveChanges();
 			int numATStatesPruned = repository.getATRepository().pruneAtStates(2, 500);
+			System.out.println("Number of AT states pruned (Expected 498): " + numATStatesPruned);
 			assertEquals(498, numATStatesPruned); // Minus 1 for genesis block, and another for the latest AT state
 			repository.getATRepository().setAtPruneHeight(501);
 
 			// Now ensure the SQL repository is missing blocks 2 and 500...
+			System.out.println("Verifying that blocks 2 and 500 have been pruned...");
 			assertNull(repository.getBlockRepository().fromHeight(2));
 			assertNull(repository.getBlockRepository().fromHeight(500));
+			System.out.println("Blocks 2 and 500 have been successfully pruned.");
 
 			// ... but it's not missing blocks 1 and 501 (we don't prune the genesis block)
+			System.out.println("Verifying that blocks 1 and 501 still exist...");
 			assertNotNull(repository.getBlockRepository().fromHeight(1));
 			assertNotNull(repository.getBlockRepository().fromHeight(501));
+			System.out.println("Blocks 1 and 501 are present in the repository.");
 
 			// Validate the latest block height in the repository
-			assertEquals(1002, (int) repository.getBlockRepository().getLastBlock().getHeight());
+			int lastBlockHeight = repository.getBlockRepository().getLastBlock().getHeight();
+			System.out.println("Latest block height in repository (Expected 1002): " + lastBlockHeight);
+			assertEquals(1002, lastBlockHeight);
 
 			// Now orphan some unarchived blocks.
+			System.out.println("Orphaning 500 blocks...");
 			BlockUtils.orphanBlocks(repository, 500);
-			assertEquals(502, (int) repository.getBlockRepository().getLastBlock().getHeight());
+			int currentLastBlockHeight = repository.getBlockRepository().getLastBlock().getHeight();
+			System.out.println("New last block height after orphaning (Expected 502): " + currentLastBlockHeight);
+			assertEquals(502, currentLastBlockHeight);
 
 			// We're close to the lower limit of the SQL database now, so
 			// we need to import some blocks from the archive
+			System.out.println("Importing blocks 401 to 500 from the archive...");
 			BlockArchiveUtils.importFromArchive(401, 500, repository);
 
 			// Ensure the SQL repository now contains block 401 but not 400...
+			System.out.println("Verifying that block 401 exists and block 400 does not...");
 			assertNotNull(repository.getBlockRepository().fromHeight(401));
 			assertNull(repository.getBlockRepository().fromHeight(400));
+			System.out.println("Block 401 exists, block 400 does not.");
 
 			// Import the remaining 399 blocks
+			System.out.println("Importing blocks 2 to 400 from the archive...");
 			BlockArchiveUtils.importFromArchive(2, 400, repository);
 
 			// Verify that block 3 matches the original
+			System.out.println("Verifying that block 3 matches the original data...");
 			BlockData block3DataPostArchive = repository.getBlockRepository().fromHeight(3);
 			assertArrayEquals(block3DataPreArchive.getSignature(), block3DataPostArchive.getSignature());
 			assertEquals(block3DataPreArchive.getHeight(), block3DataPostArchive.getHeight());
+			System.out.println("Block 3 data matches the original.");
 
 			// Orphan 2 more block, which should be the last one that is possible to be orphaned
 			// TODO: figure out why this is 1 block more than in the equivalent block archive V1 test
+			System.out.println("Orphaning 2 more blocks...");
 			BlockUtils.orphanBlocks(repository, 2);
+			System.out.println("Orphaned 2 blocks successfully.");
 
 			// Orphan another block, which should fail
+			System.out.println("Attempting to orphan another block, which should fail...");
 			Exception exception = null;
 			try {
 				BlockUtils.orphanBlocks(repository, 1);
 			} catch (DataException e) {
 				exception = e;
+				System.out.println("Caught expected DataException: " + e.getMessage());
 			}
 
 			// Ensure that a DataException is thrown because there is no more AT states data available
 			assertNotNull(exception);
 			assertEquals(DataException.class, exception.getClass());
+			System.out.println("DataException confirmed due to lack of AT states data.");
 
 			// FUTURE: we may be able to retain unique AT states when trimming, to avoid this exception
 			// and allow orphaning back through blocks with trimmed AT states.
 
+			System.out.println("testTrimArchivePruneAndOrphan completed successfully.");
 		}
 	}
 
@@ -477,16 +619,26 @@ public class BlockArchiveV2Tests extends Common {
 	public void testMissingAtStatesHeightIndex() throws DataException, SQLException {
 		try (final HSQLDBRepository repository = (HSQLDBRepository) RepositoryManager.getRepository()) {
 
+			System.out.println("Starting testMissingAtStatesHeightIndex");
+
 			// Firstly check that we're able to prune or archive when the index exists
+			System.out.println("Checking existence of ATStatesHeightIndex...");
 			assertTrue(repository.getATRepository().hasAtStatesHeightIndex());
 			assertTrue(RepositoryManager.canArchiveOrPrune());
+			System.out.println("ATStatesHeightIndex exists. Archiving and pruning are possible.");
 
 			// Delete the index
+			System.out.println("Dropping ATStatesHeightIndex...");
 			repository.prepareStatement("DROP INDEX ATSTATESHEIGHTINDEX").execute();
+			System.out.println("ATStatesHeightIndex dropped.");
 
 			// Ensure check that we're unable to prune or archive when the index doesn't exist
+			System.out.println("Verifying that ATStatesHeightIndex no longer exists...");
 			assertFalse(repository.getATRepository().hasAtStatesHeightIndex());
 			assertFalse(RepositoryManager.canArchiveOrPrune());
+			System.out.println("ATStatesHeightIndex does not exist. Archiving and pruning are disabled.");
+
+			System.out.println("testMissingAtStatesHeightIndex completed successfully.");
 		}
 	}
 
@@ -496,8 +648,10 @@ public class BlockArchiveV2Tests extends Common {
 		Path archivePath = Paths.get(Settings.getInstance().getRepositoryPath(), "archive").toAbsolutePath();
 		try {
 			FileUtils.deleteDirectory(archivePath.toFile());
+			System.out.println("Deleted archive directory at: " + archivePath);
 		} catch (IOException e) {
 
+			System.out.println("Failed to delete archive directory: " + e.getMessage());
 		}
 	}
 

src/test/java/org/qortal/test/RepositoryTests.java

@@ -411,13 +411,20 @@ public class RepositoryTests extends Common {
 		}
 	}
 
-	/** Specifically test LATERAL() usage in Chat repository */
+	/** Specifically test LATERAL() usage in Chat repository with hasChatReference */
 	@Test
 	public void testChatLateral() {
 		try (final HSQLDBRepository hsqldb = (HSQLDBRepository) RepositoryManager.getRepository()) {
 			String address = Crypto.toAddress(new byte[32]);
 
-			hsqldb.getChatRepository().getActiveChats(address, ChatMessage.Encoding.BASE58);
+			// Test without hasChatReference
+			hsqldb.getChatRepository().getActiveChats(address, ChatMessage.Encoding.BASE58, null);
+
+			// Test with hasChatReference = true
+			hsqldb.getChatRepository().getActiveChats(address, ChatMessage.Encoding.BASE58, true);
+
+			// Test with hasChatReference = false
+			hsqldb.getChatRepository().getActiveChats(address, ChatMessage.Encoding.BASE58, false);
 		} catch (DataException e) {
 			fail("HSQLDB bug #1580");
 		}

src/test/java/org/qortal/test/TransferPrivsTests.java

@@ -74,7 +74,7 @@ public class TransferPrivsTests extends Common {
 	public void testAliceIntoNewAccountTransferPrivs() throws DataException {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			TestAccount alice = Common.getTestAccount(repository, "alice");
-			assertTrue(alice.canMint());
+			assertTrue(alice.canMint(false));
 
 			PrivateKeyAccount aliceMintingAccount = Common.getTestAccount(repository, "alice-reward-share");
 
@@ -86,8 +86,8 @@ public class TransferPrivsTests extends Common {
 
 			combineAccounts(repository, alice, randomAccount, aliceMintingAccount);
 
-			assertFalse(alice.canMint());
-			assertTrue(randomAccount.canMint());
+			assertFalse(alice.canMint(false));
+			assertTrue(randomAccount.canMint(false));
 		}
 	}
 
@@ -97,8 +97,8 @@ public class TransferPrivsTests extends Common {
 			TestAccount alice = Common.getTestAccount(repository, "alice");
 			TestAccount dilbert = Common.getTestAccount(repository, "dilbert");
 
-			assertTrue(alice.canMint());
-			assertTrue(dilbert.canMint());
+			assertTrue(alice.canMint(false));
+			assertTrue(dilbert.canMint(false));
 
 			// Dilbert has level, Alice does not so we need Alice to mint enough blocks to bump Dilbert's level post-combine
 			final int expectedPostCombineLevel = dilbert.getLevel() + 1;
@@ -118,11 +118,11 @@ public class TransferPrivsTests extends Common {
 
 			// Post-combine sender checks
 			checkSenderPostTransfer(postCombineAliceData);
-			assertFalse(alice.canMint());
+			assertFalse(alice.canMint(false));
 
 			// Post-combine recipient checks
 			checkRecipientPostTransfer(preCombineAliceData, preCombineDilbertData, postCombineDilbertData, expectedPostCombineLevel);
-			assertTrue(dilbert.canMint());
+			assertTrue(dilbert.canMint(false));
 
 			// Orphan previous block
 			BlockUtils.orphanLastBlock(repository);
@@ -130,12 +130,12 @@ public class TransferPrivsTests extends Common {
 			// Sender checks
 			AccountData orphanedAliceData = repository.getAccountRepository().getAccount(alice.getAddress());
 			checkAccountDataRestored("sender", preCombineAliceData, orphanedAliceData);
-			assertTrue(alice.canMint());
+			assertTrue(alice.canMint(false));
 
 			// Recipient checks
 			AccountData orphanedDilbertData = repository.getAccountRepository().getAccount(dilbert.getAddress());
 			checkAccountDataRestored("recipient", preCombineDilbertData, orphanedDilbertData);
-			assertTrue(dilbert.canMint());
+			assertTrue(dilbert.canMint(false));
 		}
 	}
 
@@ -145,8 +145,8 @@ public class TransferPrivsTests extends Common {
 			TestAccount alice = Common.getTestAccount(repository, "alice");
 			TestAccount dilbert = Common.getTestAccount(repository, "dilbert");
 
-			assertTrue(dilbert.canMint());
-			assertTrue(alice.canMint());
+			assertTrue(dilbert.canMint(false));
+			assertTrue(alice.canMint(false));
 
 			// Dilbert has level, Alice does not so we need Alice to mint enough blocks to surpass Dilbert's level post-combine
 			final int expectedPostCombineLevel = dilbert.getLevel() + 1;
@@ -166,11 +166,11 @@ public class TransferPrivsTests extends Common {
 
 			// Post-combine sender checks
 			checkSenderPostTransfer(postCombineDilbertData);
-			assertFalse(dilbert.canMint());
+			assertFalse(dilbert.canMint(false));
 
 			// Post-combine recipient checks
 			checkRecipientPostTransfer(preCombineDilbertData, preCombineAliceData, postCombineAliceData, expectedPostCombineLevel);
-			assertTrue(alice.canMint());
+			assertTrue(alice.canMint(false));
 
 			// Orphan previous block
 			BlockUtils.orphanLastBlock(repository);
@@ -178,12 +178,12 @@ public class TransferPrivsTests extends Common {
 			// Sender checks
 			AccountData orphanedDilbertData = repository.getAccountRepository().getAccount(dilbert.getAddress());
 			checkAccountDataRestored("sender", preCombineDilbertData, orphanedDilbertData);
-			assertTrue(dilbert.canMint());
+			assertTrue(dilbert.canMint(false));
 
 			// Recipient checks
 			AccountData orphanedAliceData = repository.getAccountRepository().getAccount(alice.getAddress());
 			checkAccountDataRestored("recipient", preCombineAliceData, orphanedAliceData);
-			assertTrue(alice.canMint());
+			assertTrue(alice.canMint(false));
 		}
 	}
 
@@ -202,8 +202,8 @@ public class TransferPrivsTests extends Common {
 			TestAccount chloe = Common.getTestAccount(repository, "chloe");
 			TestAccount dilbert = Common.getTestAccount(repository, "dilbert");
 
-			assertTrue(dilbert.canMint());
-			assertFalse(chloe.canMint());
+			assertTrue(dilbert.canMint(false));
+			assertFalse(chloe.canMint(false));
 
 			// COMBINE DILBERT INTO CHLOE
 
@@ -225,16 +225,16 @@ public class TransferPrivsTests extends Common {
 
 			// Post-combine sender checks
 			checkSenderPostTransfer(post1stCombineDilbertData);
-			assertFalse(dilbert.canMint());
+			assertFalse(dilbert.canMint(false));
 
 			// Post-combine recipient checks
 			checkRecipientPostTransfer(pre1stCombineDilbertData, pre1stCombineChloeData, post1stCombineChloeData, expectedPost1stCombineLevel);
-			assertTrue(chloe.canMint());
+			assertTrue(chloe.canMint(false));
 
 			// COMBINE ALICE INTO CHLOE
 
-			assertTrue(alice.canMint());
-			assertTrue(chloe.canMint());
+			assertTrue(alice.canMint(false));
+			assertTrue(chloe.canMint(false));
 
 			// Alice needs to mint enough blocks to surpass Chloe's level post-combine
 			final int expectedPost2ndCombineLevel = chloe.getLevel() + 1;
@@ -254,11 +254,11 @@ public class TransferPrivsTests extends Common {
 
 			// Post-combine sender checks
 			checkSenderPostTransfer(post2ndCombineAliceData);
-			assertFalse(alice.canMint());
+			assertFalse(alice.canMint(false));
 
 			// Post-combine recipient checks
 			checkRecipientPostTransfer(pre2ndCombineAliceData, pre2ndCombineChloeData, post2ndCombineChloeData, expectedPost2ndCombineLevel);
-			assertTrue(chloe.canMint());
+			assertTrue(chloe.canMint(false));
 
 			// Orphan 2nd combine
 			BlockUtils.orphanLastBlock(repository);
@@ -266,12 +266,12 @@ public class TransferPrivsTests extends Common {
 			// Sender checks
 			AccountData orphanedAliceData = repository.getAccountRepository().getAccount(alice.getAddress());
 			checkAccountDataRestored("sender", pre2ndCombineAliceData, orphanedAliceData);
-			assertTrue(alice.canMint());
+			assertTrue(alice.canMint(false));
 
 			// Recipient checks
 			AccountData orphanedChloeData = repository.getAccountRepository().getAccount(chloe.getAddress());
 			checkAccountDataRestored("recipient", pre2ndCombineChloeData, orphanedChloeData);
-			assertTrue(chloe.canMint());
+			assertTrue(chloe.canMint(false));
 
 			// Orphan 1nd combine
 			BlockUtils.orphanToBlock(repository, pre1stCombineBlockHeight);
@@ -279,7 +279,7 @@ public class TransferPrivsTests extends Common {
 			// Sender checks
 			AccountData orphanedDilbertData = repository.getAccountRepository().getAccount(dilbert.getAddress());
 			checkAccountDataRestored("sender", pre1stCombineDilbertData, orphanedDilbertData);
-			assertTrue(dilbert.canMint());
+			assertTrue(dilbert.canMint(false));
 
 			// Recipient checks
 			orphanedChloeData = repository.getAccountRepository().getAccount(chloe.getAddress());
@@ -287,7 +287,7 @@ public class TransferPrivsTests extends Common {
 
 			// Chloe canMint() would return true here due to Alice-Chloe reward-share minting at top of method, so undo that minting by orphaning back to block 1
 			BlockUtils.orphanToBlock(repository, 1);
-			assertFalse(chloe.canMint());
+			assertFalse(chloe.canMint(false));
 		}
 	}
 

src/test/resources/test-chain-v2-block-timestamps.json

@@ -81,7 +81,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 9999999999999,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -91,7 +91,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-disable-reference.json

@@ -84,7 +84,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 0,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -94,7 +94,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-founder-rewards.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-leftover-reward.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-minting.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 0,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 9999999999999,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-penalty-fix.json

@@ -83,16 +83,24 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
-		"selfSponsorshipAlgoV1Height": 99999999,
+		"selfSponsorshipAlgoV1Height": 999999999,
+		"selfSponsorshipAlgoV2Height": 999999999,
+		"selfSponsorshipAlgoV3Height": 999999999,
 		"feeValidationFixTimestamp": 0,
 		"chatReferenceTimestamp": 0,
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
-		"selfSponsorshipAlgoV2Height": 9999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
 		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999,
 		"penaltyFixHeight": 5
 	},
 	"genesisInfo": {

src/test/resources/test-chain-v2-qora-holder-extremes.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-qora-holder-reduction.json

@@ -86,7 +86,7 @@
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
 		"aggregateSignatureTimestamp": 0,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -96,7 +96,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-qora-holder.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-reward-levels.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-reward-scaling.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 500,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-reward-shares.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-self-sponsorship-algo-v1.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 20,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-self-sponsorship-algo-v2.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 30,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2-self-sponsorship-algo-v3.json

@@ -85,7 +85,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -95,7 +95,14 @@
 		"arbitraryOptionalFeeTimestamp": 0,
 		"unconfirmableRewardSharesHeight": 99999999,
 		"disableTransferPrivsTimestamp": 9999999999500,
-		"enableTransferPrivsTimestamp": 9999999999950
+		"enableTransferPrivsTimestamp": 9999999999950,
+		"cancelSellNameValidationTimestamp": 9999999999999,
+		"disableRewardshareHeight": 9999999999990,
+		"enableRewardshareHeight": 9999999999999,
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

src/test/resources/test-chain-v2.json

@@ -86,7 +86,7 @@
 		"transactionV5Timestamp": 0,
 		"transactionV6Timestamp": 0,
 		"disableReferenceTimestamp": 9999999999999,
-		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"increaseOnlineAccountsDifficultyTimestamp": 9999999999990,
 		"onlineAccountMinterLevelValidationHeight": 0,
 		"selfSponsorshipAlgoV1Height": 999999999,
 		"selfSponsorshipAlgoV2Height": 999999999,
@@ -100,8 +100,10 @@
 		"cancelSellNameValidationTimestamp": 9999999999999,
 		"disableRewardshareHeight": 9999999999990,
 		"enableRewardshareHeight": 9999999999999,
-		"onlyMintWithNameHeight": 9999999999999,
-		"groupMemberCheckHeight": 9999999999999
+		"onlyMintWithNameHeight": 9999999999990,
+		"groupMemberCheckHeight": 9999999999999,
+		"decreaseOnlineAccountsDifficultyTimestamp": 9999999999999,
+		"removeOnlyMintWithNameHeight": 9999999999999
 	},
 	"genesisInfo": {
 		"version": 4,

start.sh

@@ -33,8 +33,13 @@ fi
 # Limits Java JVM stack size and maximum heap usage.
 # Comment out for bigger systems, e.g. non-routers
 # or when API documentation is enabled
-# Uncomment (remove '#' sign) line below if your system has less than 12GB of RAM for optimal RAM defaults
-JVM_MEMORY_ARGS="-Xss256m -XX:+UseSerialGC"
+# JAVA MEMORY SETTINGS BELOW - These settings are essentially optimized default settings.
+# Combined with the latest changes on the Qortal Core in version 4.6.6 and beyond,
+# should give a dramatic increase In performance due to optimized Garbage Collection.
+# These memory arguments should work on machines with as little as 6GB of RAM.
+# If you want to run on a machine with less than 6GB of RAM, it is suggested to increase the '50' below to '75'
+# The Qortal Core will utilize only as much RAM as it needs, but up-to the amount set in percentage below.
+JVM_MEMORY_ARGS="-XX:MaxRAMPercentage=50 -XX:+UseG1GC -Xss1024k"
 
 # Although java.net.preferIPv4Stack is supposed to be false
 # by default in Java 11, on some platforms (e.g. FreeBSD 12),