【框架设计】点券寄售：付费道具的流通管控

function Voucher.list(plr, slot, goldPrice)
    local item = plr.bag[slot]
    if not VOUCHER_DEF[item.id] then return false, "该物品不可寄售" end
    if goldPrice > 50000000 then return false, "超过限价" end
    plr.bag[slot] = nil
    voucherBoard[#voucherBoard + 1] = {
        owner = plr.id, item = item, price = goldPrice, at = os.time(),
    }
    return true
end

function Voucher.buy(buyer, index)
    local v = voucherBoard[index]
    if not v then return false end
    if not QF_CostGold(buyer, v.price) then return false, "金币不足" end
    QF_GiveItem(buyer, v.item)
    QF_MailGold(v.owner, math.floor(v.price * 0.9), "寄售成交")
    voucherBoard[index] = nil
    if v.price / math.max(VOUCHER_DEF[v.item.id].ref, 1) > 3 then
        QF_Alarm("异常溢价寄售", v.item.id)
    end
    return true
end