Pessoal, estou apanhando pra colocar um storage nesse script, de modo que os itens só possam ser trocados 1 vez..

Se alguém puder ajudar dou rep+

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   


function GSS(cid, message, keywords, parameters, node)   
   if(not npcHandler:isFocused(cid)) then   
       return false   
   end   
       if getPlayerItemCount(cid,5879) >= 1 then   
       if doPlayerRemoveItem(cid,5879,1) then   
           npcHandler:say('Here is your spool of yarn!', cid)   
           doPlayerAddItem(cid,5886,1)   
       end   
       else   
           npcHandler:say('Sorry, you don\'t have the giant spider silk!', cid)   
  end      
end 


keywordHandler:addKeyword({'giant spider silk'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you wanna exchange a giant spider silk into a {spool of yarn}?.'}) 

local node1 = keywordHandler:addKeyword({'spool of yarn'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Are you sure?'})   
   node1:addChildKeyword({'yes'}, GSS, {npcHandler = npcHandler, onlyFocus = true, reset = true})   
   node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Come back when you want.', reset = true})

       npcHandler:addModule(FocusModule:new())

Tente assim:

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   


function GSS(cid, message, keywords, parameters, node)   
if(not npcHandler:isFocused(cid)) then   
   	return false   
end
if getPlayerStorageValue(cid, 9899) <= 0 then
   	if getPlayerItemCount(cid,5879) >= 1 then   
		if doPlayerRemoveItem(cid,5879,1) then   
			npcHandler:say('Here is your spool of yarn!', cid)   
			doPlayerAddItem(cid,5886,1) 
			setPlayerStorageValue(cid, 9899, 1)
		end   
   	else   
       	npcHandler:say('Sorry, you don\'t have the giant spider silk!', cid)   
	end 
else
	npcHandler:say('Sorry, you have already traded with me.', cid)
end
end 


keywordHandler:addKeyword({'giant spider silk'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Do you wanna exchange a giant spider silk into a {spool of yarn}?.'}) 

local node1 = keywordHandler:addKeyword({'spool of yarn'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Are you sure?'})   
node1:addChildKeyword({'yes'}, GSS, {npcHandler = npcHandler, onlyFocus = true, reset = true})   
node1:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Come back when you want.', reset = true})

npcHandler:addModule(FocusModule:new())

flw

Apocarai, brigadao cara funfo certinho

Só nao do Rep+ agora porque só mais tarde libera, mas é seu. Flws