I build the systems that make Roblox games work_

1--!strict
2-- Validates and rate-limits incoming remote calls
3local Players = game:GetService("Players")
4
5local RemoteGuard = {}
6local lastCall: {[Player]: number} = {}
7local COOLDOWN = 0.15
8
9function RemoteGuard.wrap(remote: RemoteEvent, schema: {string}, handler)
10	remote.OnServerEvent:Connect(function(player, ...)
11		local now = os.clock()
12		if now - (lastCall[player] or 0) < COOLDOWN then
13			return -- throttled
14		end
15		lastCall[player] = now
16
17		local args = table.pack(...)
18		if args.n ~= #schema then return end
19		for i, expected in schema do
20			if typeof(args[i]) ~= expected then
21				warn(("[Guard] %s sent bad arg #%d"):format(player.Name, i))
22				return
23			end
24		end
25		handler(player, table.unpack(args, 1, args.n))
26	end)
27end
28
29Players.PlayerRemoving:Connect(function(player)
30	lastCall[player] = nil
31end)
32
33return RemoteGuard