That One Chest Lock

Lock your trapped chests using renamed trial keys.

The name of the trial key becomes the chest’s password. Anyone holding a trial key with the exact same name can open the chest normally, making it easy to create spare keys and share access with other players.

Features

• Lock trapped chests using /trigger lock
• Unlock them using /trigger unlock
• Open locked chests normally with a matching trial key
• Supports single and double trapped chests
• Share access by creating another key with the same name
• Change the password by unlocking and relocking with a newly named key
• Restores locked chests after players mine them
• Protects against TNT and Creeper explosions
• Removes hoppers and hopper minecarts placed underneath
• Works entirely server-side
• No client-side installation required
• Compatible with Bedrock players joining through Geyser

Regular chests are intentionally ignored. Trapped chests provide a clear visual indicator that the container can be locked.

How to Use

Create a Key

Obtain a trial key and rename it using an anvil. Its name will be used as the password.

Lock a Chest

Place a trapped chest, hold your renamed trial key, look directly at the chest, and run:

/trigger lock

Open a Chest

Hold a trial key with the matching name and right-click the chest normally.

Unlock a Chest

Hold the matching trial key, look at the chest, and run:

/trigger unlock

Installation

1. Place the datapack ZIP inside your world's datapacks folder.
2. Run /reload.
3. Run /datapack list to confirm that the datapack is enabled.

Important Limitations

• Anyone who knows or guesses the key name can create a matching key.
• Renamed trial keys cannot be used to open trial chamber vaults.
• Hoppers directly underneath locked chests are removed, including your own automation hoppers.
• Server operators can bypass locks using commands.
• Waterlogged chests are restored without their waterlogged state.

Protect your diamonds, valuables, and suspicious stacks of dirt with That One Chest Lock.