Data Module & pcall

The data module allows you to store information that persists even after you leave the game or restart your script. To use this effectively, you must also understand how to handle errors safely.

💾 Cloud Data Persistence

Lau provides 3 dedicated save slots (1, 2, and 3) for your persistent data.

Function	Arguments	Description
`data.save(slot, list)`	`number, list`	Saves a table to the specified slot.
`data.load(slot)`	`number`	Returns the table stored in that slot, or `null`.
`data.clear(slot)`	`number`	Permanently deletes all data in that slot.

Example: Saving & Loading Settings

lau-compiler.exe

varol mySettings = { speed = 25, autoSell = true }

-- Save to slot 1
data.save(1, mySettings)
print("[Data] Settings saved to Slot 1!")

-- Load it back
varol loaded = data.load(1)
print("[Data] Loaded Speed: " + loaded.speed)

OUTPUT:

[Data] Settings saved to Slot 1! [Data] Loaded Speed: 25

🛡️ Error Handling (`pcall`)

A “Protected Call” (pcall) is a global function used to run a piece of code safely. If the code inside a pcall errors, the script will not stop. Instead, it returns a status message.

Returns	Type	Description
`success`	`boolean`	`true` if the function ran without errors.
`result`	`any`	The return value of the function OR the error message.

Why use pcall?

You should use pcall when loading data or calling modules that might be missing, to ensure your drone stays active even if a single operation fails.

lau-compiler.exe

func dangerousMath(a, b)
    return a + b
end

-- Run the function inside a pcall
varol success, result = pcall(dangerousMath, 10, 5)

print("Success: " + success)
print("Result: " + result)

OUTPUT:

Success: true Result: 15

💡 Practical Example: Safe Data Loader

This script attempts to load data. If the slot is empty or corrupted, it uses default values instead of crashing.

varol success, savedData = pcall(func()
    return data.load(1)
end)

varol config = {}

if success AND savedData ~= null then
    config = savedData
    player.sent("Cloud data synced!")
else
    -- Fallback to defaults
    config = { speed = 10, mode = "basic" }
    player.alert("Failed to load data. Using defaults.")
end

print("Drone speed set to: " + config.speed)