attempt to call global 'getItemNameById' when say trade with NPC

[VictorOtInfinit]

Hello, i'm doing a NPC that sell things for another coin. So, i got this error on my console:


Code:

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid)            npcHandler:onCreatureAppear(cid)            end
function onCreatureDisappear(cid)        npcHandler:onCreatureDisappear(cid)            end
function onCreatureSay(cid, type, msg)        npcHandler:onCreatureSay(cid, type, msg)        end
function onThink()                npcHandler:onThink()                    end

local talkState = {}

function creatureSayCallback(cid, type, msg)

    if not npcHandler:isFocused(cid) then
        return false
    end
    
local talkUser = NPCHANDLER_CONVbehavior == CONVERSATION_DEFAULT and 0 or cid
local itemid = 10169 -- Novos points
local shopWindow = {}

local t = { -- [ID do item] e o preço que ele irá custar em points.
 [2260] = {price = 1}, -- blank rune
 [21394] = {price = 10}, -- explode hearth
 [6574] = {price = 100}, -- chocolate bar
 [36460] = {price = 150} -- infinity backpack
 }

 
local onBuy = function(cid, item, subType, amount, ignoreCap, inBackpacks)
    if  t[item] and getPlayerItemCount(cid, itemid) < t[item].price then
        selfSay("you do not have "..t[item].price.." Crystal Tokens.", cid)
    else
        doPlayerAddItem(cid, item)
        doPlayerRemoveItem(cid, itemid, (t[item].price))
        selfSay("Here you item", cid)
    end
    
return true
end

if (msgcontains(msg, 'trade') or msgcontains(msg, 'TRADE'))then
    for var, ret in pairs(t) do
        table.insert(shopWindow, {itemId = var, subType = 0, buy = ret.quant, sell = 0, name = getItemNameById(var)})
    end
    openShopWindow(cid, shopWindow, onBuy, onSell)
end
    
return true
end

npcHandler:setCallback(CALLBACK_MESSAGE_DEFAULT, creatureSayCallback)
npcHandler:addModule(FocusModule:new())

Need help with this pls!!

 

[Evil Puncker]

add the following line to the end of file to your data/lib/compat/compat.lua:

getItemNameById = getItemName

 

[VictorOtInfinit]

The error is gone, but when i say TRADE the npc open a window with nothing: