帮会宝阁：帮会宝物兑换的积分商店

local EXCHANGE = {
    [1] = {cost = 100, item = 9801},
    [2] = {cost = 300, item = 9802},
    [3] = {cost = 800, item = 9803},
}
local function redeem(actor, tier)
    local info = EXCHANGE[tier]
    if info == nil then
        sendmsg(actor, 1, "无此兑换档位")
        return
    end
    local pts = getplayvar(actor, "guildPts") or 0
    if pts < info.cost then
        sendmsg(actor, 1, "积分不足，需 "
            .. info.cost)
        return
    end
    setplayvar(actor, "guildPts", pts - info.cost)
    giveitem(actor, info.item, 1)
    sendmsg(actor, 1, "兑换成功，剩余积分 " .. pts - info.cost)
end

local function queryPts(actor)
    sendmsg(actor, 1, "当前积分 "
        .. (getplayvar(actor, "guildPts") or 0))
end