【进阶实战】Lua指数退避：裁决之杖鉴定重试的翻倍节奏

for i = 1, 5 do
    local ok = fetchRemote()
    if ok then break end             -- 立刻连试5次，雪上加霜
end

-- 裁决之杖鉴定接口：指数退避重试
local function retryFetch(actor)
    local wait = 1
    for attempt = 1, 5 do
        if fetchRemote() then return true end
        sendmsg(actor, 1, "第 " .. attempt
            .. " 次失败，" .. wait .. " 秒后重试")
        wait = wait * 2                   -- 指数退避翻倍
    end
    return false
end