防挂机验证：随机时刻的应答检查

local function onGather(actor)
    giveitem(actor, "矿石", 1, 0, "采矿")   -- 不设防，脚本通宵挂
end

local PENDING = {}
local function onGather(actor)
    if math.random(1, 20) == 1 then
        PENDING[actor] = os.time()
        sendmsg(actor, 1, "请回话1确认在线")
        return
    end
    giveitem(actor, "矿石", 1, 0, "采矿")
end
local function onReply(actor)
    local t = PENDING[actor]
    if t and os.time() - t <= 60 then
        PENDING[actor] = nil
        giveitem(actor, "矿石", 1, 0, "采矿")
    end
end