roblox datastores 2 tutorial
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")
local ServerScriptService = game:GetService("ServerScriptService")
local DataStore2 = require(ServerScriptService.DataStore2)
-- Always "combine" any key you use! To understand why, read the "Gotchas" page.
DataStore2.Combine("DATA", "coins")
Players.PlayerAdded:Connect(function(player)
	local coinStore = DataStore2("coins", player)
	local function callRemote(value)
		ReplicatedStorage.CoinAmount:FireClient(player, value)
	end
	-- Fire a remote event to the player telling them how many coins they have.
	-- If this is their first time playing the game, they'll start out with 100.
	callRemote(coinStore:Get(100))
	-- Everytime the coin store updates, we'll send the RemoteEvent again.
	coinStore:OnUpdate(callRemote)
end)
-- This is a RemoteEvent where a player can purchase a product by its name.
local Products = require(ReplicatedStorage.Products)
ReplicatedStorage.BuyProduct.OnServerEvent:connect(function(player, productName)
	if not Products[productName] then return end -- Make sure the player is buying a real product
	local coinStore = DataStore2("coins", player)
	local productPrice = Products[productName].price
	if coinStore:Get(100) >= productPrice then
		print("Buying product", productName)
		coinStore:Increment(-productPrice)
	end
end)
