AntiLavaCast

AntiLavaCast

Prevents high altitude lava placement to stop lava casting on Paper 1.21.x.

Features

- Cancels lava bucket placement, flow or both if it is more than the configured height above natural ground. - Uses CoreProtect history (when available) to identify player-placed blocks for accurate ground detection. - Logs a server alert when a placement is blocked. - Supports live config reload and runtime toggling. - Lava casting attribution, optional logs will tell you who tried to place lava and where. - Maintains natural world lava flow.

```[AntiLavaCast] Blocked lava placement by CevAPI at -85,164,-29 (heightAboveGround=96, groundY=68)```

Requirements

- Paper 1.21.x - Java 21+

Install

1. Download the jar. 2. Drop the jar into your server `plugins` folder. 3. Start the server to generate the config.

Commands

- `/lavacast reload` - `/lavacast enable` - `/lavacast disable` - `/lavacast setheight <blocks>` - `/lavacast drop <on|off>` on allows dropping - `/lavacast flow <on|off>` on allows flowing - `/lavacast logs <on|off>` on logs blocked placements - `/lavacast coreprotect <on|off>` toggles CoreProtect integration - `/lavacast coreprotectlookback <seconds|1m|2h|7d|4w>` sets how far back CoreProtect history is searched - `/lavacast mark <radius>` marks nearby blocks as player-placed for height checks (max radius 100)

Permissions

`lavacast.admin` (default: op)

Config

`plugins/AntiLavaCast/config.yml` ```yaml max-height-above-ground: 20 enabled: true allow-lava-drop: false allow-lava-flow: false log-blocked-placements: true coreprotect-enabled: true coreprotect-lookback-seconds: 31536000 ```

Notes

- The ground scan ignores player-placed blocks; when CoreProtect is available it will also treat historical placements as player-placed. - Use `/lavacast mark <radius>` around old builds to mark them as player-placed if CoreProtect is not available. - Marked blocks are stored on disk in `plugins/AntiLavaCast/marks` and persist across restarts. - When CoreProtect is enabled and detected, mark storage is disabled and lookups rely on CoreProtect instead.