Changelog — v2.0.0 (Release)

New Features

Economy Statistics Dashboard

• Real-time economy overview in the admin Economy Management screen (Statistics tab)
• Tracks: total accounts, money in circulation, average balance, richest player, inflation rate
• Marketplace stats: active listings, template counts
• Gambling stats: total bets, wins, amounts wagered/won
• Transaction breakdown: purchases, sales, transfers, free rewards
• Color-coded inflation indicator (green/yellow/red)
• Refresh button for live data updates

Transaction Recording System

• All economy operations now record typed transactions: MINEBAY_PURCHASE, MINEBAY_SALE, GAMBLING_BET, GAMBLING_WIN, FREE_REWARD, PLAYER_TRANSFER_SENT, PLAYER_TRANSFER_RECEIVED, TASK_REWARD
• Bank screen displays transaction type icons and color-coded entries
• Full audit trail across all economy features

Action Bar Notifications

• Success/error messages now display as action bar text (above hotbar) instead of chat messages
• Applied across all MineBay, gambling, overflow, and economy operations
• Consistent color scheme: green checkmarks for success, red crosses for errors, gold for MineBay prefix

Overflow Inventory — Creative Mode Fix

• Fixed items being silently destroyed when added to a creative mode player's inventory
• Added safeAddToInventory() with pre-check for available inventory space
• Overflow items are now correctly stored for later pickup in both survival and creative mode

Bug Fixes

Economy Management Screen

• Fixed search box overlapping with "+ New Template" button (moved to separate positions)
• Fixed edit template not loading existing values (description, goal, reward fields were empty when editing)
• Fixed Free Reward tab Save button overlapping with tip text

MineBay

• Fixed "Listing created" message missing MineBay prefix and formatting
• Fixed listing creation notification now uses action bar display

Overflow System

• Fixed "You have no overflow items" and "All overflow items claimed" text formatting
• Added consistent gold-bordered, green-checkmark action bar messages

Security & Performance Improvements

Critical Fixes

• ConcurrentModificationException prevention: Transaction iteration in SyncEconomyStatsPacket now uses snapshot copies
• Null safety: Added null checks for server and data in stats sync to prevent crashes during shutdown
• Synchronized singletons: EconomyManager.getInstance(), OverflowInventoryManager.getInstance(), MineBayManager.getInstance(), and TransactionManager.getInstance() are now thread-safe
• Gambling payout validation: Payouts are validated against NaN, Infinity, and negative values with automatic refund on invalid results — now applied to both money bets and item bets
• Stale player reference fix: PlaceGamblingBetWithItemPacket re-looks up player by UUID in delayed gambling result callback instead of using captured reference

Item Duplication Prevention

• CreateListingPacket server-authoritative items: Listing creation now reads the item from the server-side menu container instead of trusting client packet data, preventing item spoofing
• CreateListingPacket race-condition fix: The offering slot is cleared before listing creation (not after), preventing item duplication if the menu closes between listing creation and slot clearing
• PurchaseListingPacket listing status check: Listings are validated as ACTIVE before purchase and immediately marked as COMPLETED before payment processing, preventing double-purchase exploits
• AcceptOfferPacket early completion: Listing status is set to COMPLETED at the start of accept processing to prevent concurrent accept operations
• HoldItemPacket item safety: Previously held items are returned to the player before holding a new one, preventing item loss when rapidly placing different items

Escrow & Transaction Integrity

• CreateOfferPacket atomic escrow: Money escrow now uses tryWithdraw() (atomic check-and-deduct) and the entire escrow+offer creation is wrapped in try-catch with automatic rollback on failure — money is returned if anything fails
• BankAccount synchronized operations: All balance-modifying methods (deposit, withdraw, setBalance, tryWithdraw) are now synchronized to prevent concurrent modification race conditions
• BankAccount atomic tryWithdraw: New tryWithdraw() method combines balance check and withdrawal in one synchronized operation, eliminating TOCTOU race conditions

High Priority Fixes

• Margin clamp: Seller price margins clamped to -50% to +200% (was incorrectly allowing up to 500%)
• Packet validation: PurchaseListingPacket rejects invalid slot counts instead of silently truncating
• Offer packet bounds: SyncListingOffersPacket caps offer count (50) and items per offer (27) to prevent memory exhaustion
• Negative money guard: CreateOfferPacket clamps negative money offers to zero on deserialization
• Counteroffers snapshot: RequestListingOffersPacket uses snapshot copy when iterating counteroffers to prevent CME from scheduled tasks
• NBT size limits: OverflowInventoryManager.load(), MineBayManager.load(), TransactionManager.load(), and EconomyManager.loadBankInventories() all use 10MB NbtAccounter limits instead of unlimited heap to prevent memory exhaustion from corrupted data files
• HoldItemPacket slot validation: Added bounds check on slot index before accessing player inventory

Performance Fixes

• Overflow I/O debounce: OverflowInventoryManager uses markDirty() with 3-second debounce instead of saving to disk on every add/claim operation

Network Protocol

• Added SyncEconomyStatsPacket (server → client, 20 stat fields)
• Added RequestEconomyStatsPacket (client → server, admin-only with permission level 2)
• Stats auto-sync when admin opens Economy Management screen

Version Info

• Mod version: 2.0.0
• Release type: release
• Minecraft: 1.20.1
• Forge: 47.4.0+
• Java: 21+