alguem gentilmente poderia me ajudar

function onUse(cid, item)

    local runes = {

        [7005] = {id = 2273, backpackId = 1988,  count = 20, cost = 5000, },

        [7006] = {id = 2268, backpackId = 1988, count = 20, cost = 4000, },

        [7007] = {id = 2304, backpackId = 1988, count = 20, cost = 2000, },

}


    local rune = runes[item.actionid]


    if not(getPlayerFreeCap(cid) >= getItemWeightById(rune.id, rune.count)) then

        return doPlayerSendCancel(cid, "Sorry, you don't have capacity.")

    end


    if not(doPlayerRemoveMoney(cid, rune.cost) == true) then

        return doPlayerSendCancel(cid, "You need "..rune.cost.." gps to buy "..rune.count.." "..getItemNameById(rune.id))

    end


    bp = doPlayerAddItem(cid, rune.backpackId)

    doAddContainerItem(bp, rune.id, rune.count)

    doPlayerSendCancel(cid, "You bought "..rune.count.." "..getItemNameById(rune.id))

    return true

end

o que faz com isso?

em que arquivo eu adiciono?