NoChance AntiCheat

# NoChance - Multi-Layer Anti-Cheat **PacketEvents Required for 1.21.x** (https://modrinth.com/plugin/packetevents) **Note**: Plugin can work without it but it may cause problems --- ## Description NoChance is a anti-cheat with a 4-layer validation cascade system and also with packet-level detection. Designed to catch cheaters while minimizing false positives through trust scoring, adaptive sampling, and statistical analysis. ## Features - **18 Detection Modules** - Fly, Speed, KillAura, FastBreak, Reach, NoClip, Jesus, Blink, Timer, and more - **4-Layer Validation System** - Multi-stage verification to eliminate false positives - **PacketEvents Integration** - Deep packet analysis for advanced cheat detection (1.21-1.21.8 support) - **Trust Score System** - Players build trust over time, reducing false flags for legitimate skilled players - **In-Game GUI Configuration** - Edit all settings via interactive menu, no file editing needed - **Database Support** - SQLite & MySQL support with HikariCP connection pooling for optimal performance - **Staff Alerts** - Real-time notifications with customizable thresholds and alert throttling - **Discord Webhooks** - Send violation alerts directly to Discord with rich embeds - **Punishment System** - Automatic kicks, warnings, and configurable actions - **Per-Check Configuration** - Fine-tune every detection module independently - **Server Optimizations** - Adaptive sampling, async processing, and batch operations ## Commands - **/nochance menu** - Open configuration GUI - **/nochance reload** - Reload configuration - **/nochance info <player>** - View player statistics - **/nochance violations <player>** - View violation history - **/nochance reset <player>** - Reset player data - **/nochance toggle <check>** - Enable/disable specific check - **/nochance stats** - View global statistics - **/nochance alerts** - Toggle staff alerts **Aliases:** `/nc`, `/ac`, `/anticheat` ## Permissions - **nochance.admin** - Access to all NoChance commands (default: op) - **nochance.alerts** - Receive staff alert notifications (default: op) - **nochance.bypass** - Bypass ALL anti-cheat checks (default: false) - **nochance.bypass.<check>** - Bypass specific check (default: false) ### Individual Check Bypasses - nochance.bypass.fly - nochance.bypass.speed - nochance.bypass.noclip - nochance.bypass.jesus - nochance.bypass.fastbreak - nochance.bypass.fastplace - nochance.bypass.nuker - nochance.bypass.killaura - nochance.bypass.nofall - nochance.bypass.autoclicker - nochance.bypass.reach - nochance.bypass.inventory - nochance.bypass.scaffold - nochance.bypass.timer - nochance.bypass.velocity - nochance.bypass.criticals - nochance.bypass.phase - nochance.bypass.step - nochance.bypass.blink ## Default Config Preview <details> <summary>Click to view config.yml</summary> ```yaml general: time_window_seconds: 60 grace_period_seconds: 5 min_samples: 5 op_exempt: true notify_player_on_flag: true thresholds: low_confidence: 0.70 medium_confidence: 0.85 high_confidence: 0.95 extreme_confidence: 0.98 advanced_filtering: enabled: true bayesian_prior: 0.05 z_score_threshold: 2.5 min_trust_score: 0.3 established_baseline_checks: 50 established_baseline_time_seconds: 60 actions: kick_on_extreme_confidence: true kick_on_high_confidence: false warn_on_high_confidence: true warn_on_medium_confidence: true log_low_confidence: true statistical: std_dev_multiplier: 3.0 outlier_forgiveness: 3 performance: async_thread_pool_size: 4 database_max_pool_size: 10 database_min_idle: 2 database_connection_timeout_ms: 30000 database_idle_timeout_ms: 600000 database_max_lifetime_ms: 1800000 database_batch_size: 50 database_batch_interval_ms: 500 adaptive_sampling_enabled: true adaptive_sampling_warmup_checks: 100 advanced_analysis_warmup_checks: 100 advanced_analysis_strict_threshold: 500 checks: fly: enabled: true threshold: 4 severity_multiplier: 2.2 max_velocity_y: 0.52 speed: enabled: true threshold: 5 severity_multiplier: 2.8 max_speed: 0.36 sprint_multiplier: 1.32 ice_multiplier: 2.6 killaura: enabled: true threshold: 4 severity_multiplier: 3.4 max_reach: 3.2 max_angle: 48.0 max_rotation_speed: 650.0 max_cps: 17.0 cps_trusted_bonus: 2.0 cps_untrusted_penalty: 2.0 instant_flag_cps_over: 6.0 angle_trusted_bonus: 8.0 angle_untrusted_penalty: 5.0 instant_flag_angle_over: 18.0 rotation_trusted_bonus: 60.0 rotation_untrusted_penalty: 50.0 instant_flag_rotation_over: 140.0 rotation_variance_threshold: 40.0 rotation_variance_strict: 20.0 required_violations: 2 packet_variance_threshold: 25.0 packet_variance_strict: 12.0 packet_attack_rate_limit: 22 fastbreak: enabled: true threshold: 10 severity_multiplier: 1.8 min_check_interval_ms: 25 max_rapid_checks: 15 trust_