VoltrazAntiEsp - Block X-Ray & FreeCam v2.3.5

• Refactored server executor and Left Click Block signatures for Paper 26.2 compatibility
• Registered 26.1 and 26.2 modules

Fix ghost block

Fix version compability 1.21.1 - 1.21.5

Stability

• Fixed Folia scheduler compatibility for the update checker.

Features

• Added update checker to alert server operators and administrators when a new version of the plugin is available.

Bug Fixes

• Fixed a bug where list configurations without inline values (such as blacklisted-worlds) were incorrectly reset to defaults during config migrations.

Bug Fixes

• Fixed ghost block bugs by triggering immediate BFS recalculations upon block breaks (onBlockBreak calls forceNextBfs).
• Bypassed ESP checks for air and non-solid block updates to prevent visual ghost block accumulation.
• Fixed the configuration updater (ConfigUpdater.java) failing to migrate older config versions.
• Fixed the hide level reveal logic to accurately calculate world section boundaries.

Performance

• BFS Engine Optimization: Reduces CPU usage by up to 50% during visibility checks by rewriting the pathfinding algorithm logic.
• Memory Allocation Overhaul: Decreases Garbage Collection (GC) overhead by up to 80% using direct arrays and bitwise operations, significantly preventing server micro-stutters and TPS drops.
• Smart Chunk Caching: Up to 30% faster visibility updates by caching chunk states and eliminating redundant Bukkit API lookups.
• Efficient Task Scheduling: Minimizes redundant thread workloads by only queueing updates when players move significantly.

Stability

• Added rehide-on-ascend config option to control whether chunks re-hide when players climb back above the hide level.
• Refactored code structure into a Gradle multi-module project layout (common, nms-*, plugin) to cleanly isolate version-specific NMS dependencies.
• Implemented double-buffered atomic map reads in ConfigManager to prevent thread contention and TOCTOU (Time-of-Check to Time-of-Use) issues during reload.
• Prevented potential memory leaks and race conditions during chunk unloading by improving cleanup inside unloadChunk.

Compatibility

• Added native multi-version Minecraft 1.21 support with separated NMS submodules (nms-v1_21_R1 through nms-v1_21_R8).
• Updated internal configuration version schema to 5 (config-version: 5).
• Added support for custom hide-style options (AIR or DEEPSLATE).

Security

• Improved Anti-ESP validation logic for Y-levels below the configured hide level to prevent client-side ESP bypasses.
• Hardened block occlusion checks (strict block occlusion) in the ray-trace Anti-Xray module.

Bug Fixes

• Fixed NoSuchFieldError crash on 1.21.1 servers (chunkMap field incompatibility)
• Fixed entity hiding not working on player join/reconnect
• Fixed entities not being revealed when player crosses below hideLevel
• Fixed double ESP chunk processing causing packet corruption
• Fixed EspChunk section parser crash on malformed chunk data
• Fixed ViaVersion compatibility issue with chunk refresh packets

Performance

• Skip empty-air chunks during anti-freecam resend (~30-50% fewer packets)
• Reduced chunk burst rate from 40→20 per player to prevent bandwidth saturation
• Eliminated Arrays.copyOf() allocation in EspChunk hot path (GC reduction)
• Anti-freecam crossing cooldown increased to 8s to prevent exploit spam
• Copy-on-Write chunk block maps (deferred 34KB allocation per player)
• All optimizations synchronized across all NMS modules (R1—R8)

Stability

• Cross-version entity tracker uses reflection with Bukkit API fallback
• Entity hiding runs at 20 + 60 ticks after join (catches late-loading entities)
• Fixed thread safety issues during plugin reload and shutdown
• Fixed race condition in entity hiding between Netty I/O and main thread
• Defensive sanity checks in EspChunk to prevent IndexOutOfBoundsException

Compatibility

• Auto-detect server version (supports 1.21.1 — 1.21.11)
• All NMS modules synchronized (R1—R8)
• Proper Folia scheduler support for entity hide/unhide operations

Security

• Entity hiding cap overflow protection with oldest-entry eviction
• Rehide cooldown enforcement to prevent bypass

Bug Fixes

• Fixed Anti-Freecam (Rehide) not working
• Fixed players not receiving ESP protection on join/respawn

Performance

• ~93% memory allocation reduction on network threads
• Copy-on-Write chunk block maps
• Optimized anti-xray filtering
• Object pooling for hot-path allocations
• Reduced redundant lookups per packet

Stability

• Fixed memory leak in entity tracking
• Fixed race condition during chunk resend
• Fixed thread safety issue on plugin reload
• Eliminated network thread contention
• Thread-safe shutdown

Security

• Entity hiding cap overflow protection
• Rehide cooldown enforcement