Lua Problem with NPC Trade, lua script

[ligus]

Hey, I have problem with NPC Trade window. When I have in .lua script

elseif msgcontains(msg, "trade") then
        local items = { (...)

then:
Player: hi
Player: trade
Pompan: Keep in mind you won't find better offers here. Just browse through my wares.

And there appears NPC Trade window with items list but when I click on any then I can not sell/buy something :/

And while I'm trying to buy/sell something then:

[14/1/2014 14:11:46] [Error - NpcScript Interface]
[14/1/2014 14:11:46] (Unknown script file)
[14/1/2014 14:11:46] Description:
[14/1/2014 14:11:47] data/npc/scripts/Pompan.lua:77: attempt to call global 'customCallbackOnBuy' (a nil value)
[14/1/2014 14:11:47] stack traceback:
[14/1/2014 14:11:47]    data/npc/scripts/Pompan.lua:77: in function <data/npc/scripts/Pompan.lua:76>

What's wrong?


script

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

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
function onPlayerEndTrade(cid)                npcHandler:onPlayerEndTrade(cid)            end
function onPlayerCloseChannel(cid)            npcHandler:onPlayerCloseChannel(cid)        end

function creatureSayCallback(cid, type, msg)
    local talkUser = NPCHANDLER_CONVBEHAVIOR == CONVERSATION_DEFAULT and 0 or cid
    if (msgcontains(msg, "hello") or msgcontains(msg, "hi")) and (not npcHandler:isFocused(cid)) then
        npcHandler:say("Hello.", cid, TRUE)
        npcHandler:addFocus(cid)
    elseif(not npcHandler:isFocused(cid)) then
        return false
    elseif msgcontains(msg, "bye") or msgcontains(msg, "farewell") then
        npcHandler:say("It was a pleasure to help you, "..getCreatureName(cid)..".", cid, TRUE)
        npcHandler:releaseFocus(cid)
    elseif msgcontains(msg, "trade") then
        local items = {
            {name="arrow", id=2544, buy=3},
            {name="backpack", id=1988, buy=20},
            {name="bag", id=1987, buy=5},
            {name="basket", id=1989, buy=6},
            {name="bolt", id=2543, buy=4},
            {name="bow", id=2456, buy=400, sell=100},
            {name="bucket", id=2005, buy=4},
            {name="candlestick", id=2047, buy=2},
            {name="crossbow", id=2455, buy=500, sell=120},
            {name="crowbar", id=2416, buy=260, sell=50},
            {name="earth arrow", id=7850, buy=5},
            {name="expedition backpack", id=11235, buy=100},
            {name="expedition bag", id=11236, buy=50},
            {name="fishing rod", id=2580, buy=150, sell=40},
            {name="flaming arrow", id=7840, buy=5},
            {name="flash arrow", id=7838, buy=5},
            {name="inkwell", id=2600, sell=8},
            {name="lamp", id=2044, buy=8},
            {name="mirror", id=2560, sell=10},
            {name="onyx arrow", id=7365, buy=7},
            {name="pick", id=2553, buy=50, sell=15},
            {name="piercing bolt", id=7363, buy=5},
            {name="power bolt", id=2547, buy=7},
            {name="rope", id=2120, buy=50, sell=15},
            {name="royal spear", id=7378, buy=15},
            {name="scythe", id=2550, buy=50, sell=10},
            {name="shiver arrow", id=7839, buy=5},
            {name="shovel", id=2554, buy=50, sell=8},
            {name="sickle", id=2405, sell=3},
            {name="sniper arrow", id=7364, buy=5},
            {name="spear", id=2389, buy=10, sell=3},
            {name="throwing star", id=2399, buy=42},
            {name="torch", id=2050, buy=2},
            {name="closed trap", id=2578, buy=280, sell=75},
            {name="watch", id=2036, buy=20, sell=6},
            {name="worm", id=3976, buy=1}
        }
        if getPlayerStorageValue(cid, 85300) >= 1 then
            table.insert(items, {name="dragon tapestry", id=11258, buy=80})
        end
        if getPlayerStorageValue(cid, 85300) >= 2 then
            table.insert(items, {name="minotaur backpack", id=11238, buy=200})
            table.insert(items, {name="corrupted flag", id=11320, sell=700})
            table.insert(items, {name="high guard flag", id=11326, sell=550})
            table.insert(items, {name="legionnaire flags", id=11328, sell=500})
            table.insert(items, {name="zaogun flag", id=11324, sell=600})
        end
        if getPlayerStorageValue(cid, 85300) >= 5 then
            table.insert(items, {name="dragon backpack", id=11237, buy=200})
        end
        openShopWindow(cid, items,
            function(cid, itemid, subType, amount, ignoreCap, inBackpacks)
                customCallbackOnBuy(cid, itemid, subType, amount, ignoreCap, inBackpacks, items)
            end,
            function(cid, itemid, subType, amount, ignoreCap, inBackpacks)
                customCallbackOnSell(cid, itemid, subType, amount, ignoreCap, inBackpacks, items)
            end
        )
        npcHandler:say("Keep in mind you won't find better offers here. Just browse through my wares.", cid)
    end
    return TRUE
end

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

 

[ligus]

I think that I should add somewhere in libs customCallbackOnBuy, but where and what?

 

[ligus]

Does anyone know?

 

[ligus]

Is there any easy way to let trade with NPC when player has special storage?

 

[Rosestylah]

I'd copy you npchandler and modules here from /npc/lib/ but I can't go over 10000 characters.
pm me if you still need it