> For the complete documentation index, see [llms.txt](https://doc.outrun.build/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.outrun.build/en/zh/outstake-shou-yi-ji-chu-she-shi/omnichain.md).

# 跨链与速率限制

## uAsset 天生可跨链

uAsset（UETH / UUSD / UBNB）基于 **LayerZero OFT** 标准，可以在不同链之间 1:1 流转：从源链转出时销毁，在目标链上等量铸造。总量不变，只是跨越了链的边界。

发送跨链时，需以源链原生代币按系统报价支付一笔消息费，费用会随通道状态变化。跨链金额按 6 位小数精度传递：余额超出 6 位小数的部分会留在源链，不随跨链移动。例如持有 100.000000123 UUSD 并整额跨链，实际转出并到账的是 100.000000，尾数 0.000000123 留在源链钱包。

这意味着你可以在一条链上铸出 UUSD，跨到另一条链上使用，或把 UETH 从以太坊送到 Base —— uAsset 不绑死在任何一条链上。

## 速率限制：防止异常流出

跨链桥存在风险（桥本身的安全、突发的大额流出）。因此每条跨链路径都有一个**速率限制**：

* 设定一个额度上限和恢复时间窗口。
* 已转出在途的量，会随时间**逐步恢复**可用额度。
* 正常使用不受影响；但如果短期内出现**异常的大额跨链流出**，超出额度的部分会被暂时卡住。

效果是：日常跨链畅通，一旦出现异常，系统有缓冲时间应对，不至于在短时间内被抽空。

## 已发跨链不受暂停影响

一个细节保障：即使 uAsset 处于临时暂停状态，**已经发出的跨链转账仍会在目标链上完成到账**——跨链消息到达时，目标链会铸造出对应的 uAsset，暂停约束不作用于这条到账路径。这是为了让用户资金不因状态问题滞留。对称地，暂停期间**新发起的跨链发送会暂时受阻**，待恢复后自动可用。需注意，跨链到账并非绝对保证：极端的配置或通道问题下，仍可能出现源链已销毁、目标链尚未到账的滞留状态。

## 可按链调整

每条目标链、每种 uAsset 的速率限额都可以单独设置，由协议根据实际安全需要调整。

## 跨链带来什么

跨链能力让 uAsset 真正成为**全链通用媒介**：它可以从 OutStake 流向 Memeverse 部署的任意一条链，参与任意链上的创世与杠杆，不被链的边界困住。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://doc.outrun.build/en/zh/outstake-shou-yi-ji-chu-she-shi/omnichain.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.