[WARNING] Custom OTC/OTCv8 Game Store hack

function onExtendedOpcode(cid, opcode, buffer)
    if opcode == OpCode.store then
    local json_status, json_data =
    pcall(
      function()
        return json.decode(buffer)
      end
      )
    if not json_status then
      print("SHOP json error: " .. json_data)
      return false
    end
    local action = json_data["action"]
    local data = json_data["data"]

local storeWindow, interface, msgWindow, itemsPanel, historyPanel, confirmWindow, transferPoints = nil
local itemsInfo, historyInfo = nil
local code = 52
local donateURL = "https://xxx.com/donate"

(...)

function init()
  storeWindow = g_ui.displayUI('store')
  storeWindow:hide()
  interface = storeWindow:getChildById("storeInterFace")
  itemsPanel = storeWindow:getChildById("ItemsPanels")
  historyPanel = storeWindow:getChildById("historyTextListt")
  storeWindow.transferPoints.onClick = transfer

function sendAction(code, action, data)
  local protocolGame = g_game.getProtocolGame()
  if data == nil then data = {} end
  if protocolGame then
    protocolGame:sendExtendedOpcode(code, json.encode({ action = action, data = data }))
  end
end

sendAction(52, "buy", {item = "my fake name", count = 100, itemid = 2160, catId = 1, price = -500})

local clientAction = jsonData.clientAction or nil
local clientData = jsonData.clientData or {}

if type(clientAction) ~= "string" and #clientAction > 10 then return end
if type(clientData.offerID) ~= "number" then return end

local offerID = clientData.offerID or -1
local offerName, serverData = findOnOfferList(offerID, nil)

offerName = offerName or "Unknown Offer"
serverData = serverData or {}