local ds = game:GetService("DataStoreService"):GetDataStore("-tCodes01")

game.Players.PlayerAdded:Connect(function(player)
    local key = "codes-"..player.userId
    local folder = Instance.new("Folder",player)
    folder.Name = "Codes"
    local save = ds:GetAsync(key)
    if save then
        for i = 1,#save do
            local temp = Instance.new("BoolValue",folder)
            temp.Name = save[i]
        end
    end
end)

game.ReplicatedStorage.EnterCode.OnServerEvent:Connect(function(player,reward,code)
    local key = "codes-"..player.userId
    local currency = player.leaderstats:FindFirstChild("Cash") -- Name of your currency
    currency.Value = currency.Value + reward

    local bool = Instance.new("BoolValue",player.Codes)
    bool.Name = code
    bool.Value = true

    local activated = {}
    for i,v in pairs(player.Codes:GetChildren()) do
        if v:isA("BoolValue") then
            table.insert(activated, v.Name)
            ds:SetAsync(key,activated)
        end
    end
end)