> For the complete documentation index, see [llms.txt](https://axon-finance.gitbook.io/axon-finance-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://axon-finance.gitbook.io/axon-finance-docs/part-iii-ji-shu-jia-gou/part3-architecture.md).

# 引读：把确定性做进地基

> 支付链最难的不是吞吐，是确定性、授权与恢复。

Part I 与 Part II 论证了 **为什么** 需要一条为 PayFi + AI 代理支付而生的 L1。本部分回答 **怎么建**。

我们会自上而下地拆解 AXON 的技术设计：从「为什么必须自有 L1」的根本论证，到五层架构的全景，再到共识、支付最终性、喂价安全、合规网关与账户抽象的逐层细节。

本部分的章节地图：

* **3.1** 为什么必须自有 L1 —— 四个无法回避的理由。
* **3.2** 五层架构总览 —— 一笔支付自上而下的旅程。
* **3.3** 共识、亚秒最终性与性能目标 —— 以及我们如何诚实地对待性能数字。
* **3.4** 支付最终性与反双花 —— 支付链最难的那件事。
* **3.5** 稳定币与喂价 —— 多源校验与偏差熔断。
* **3.6** 可插拔合规网关 —— 把合规做进地基。
* **3.7** 账户抽象、会话密钥与 Paymaster —— 为 AI 代理支付铺原语。


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