发表机构
XDC AI（XDC AI）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该论文提出代理结算协议ASP，为稳定币链上代理商业设计三期限托管等机制，已在XDC网络实例化，适用于需链下确认履约的企业。
AI 中文摘要
自主代理已可按请求付费：如x402这类原生HTTP协议可让代理签署稳定币授权并在同一往返行程中获取资源。该模型是原子性且最终性的，适用于计量访问，但不适用于商业场景：代表个人进行的购买（如服务预约、实物订单、航班）金额较大，常被取消，在交付前不应成为卖方的资金。我们提出代理结算协议（ASP），这是基于链上授权-托管捕获（由商业支付协议标准化）的应用配置文件，适用于需通过自身订单、调度、发票或预订系统（抽象为履约引擎）在链下确认履约的企业。ASP的贡献包括：三期限托管模型，通过明确的提交-包含-最终性保证金，将发行期限、托管到期和引擎库存到期分离，确保库存不会对应可回收资金发行；履约验证层级，明确谁被信任触发捕获、其证明的内容及挑战窗口；引擎授权的部分退款，含退款流动性顺序和卖方风险敞口控制（包括原子风险敞口预留），以限制运营商信用风险；可证明自交易无利可图的分销商收入分成；以及单交易单一币种不变性；还有规范的接口规范（x402方案、金库ABI、运营商及连接器API、一致性级别），旨在让独立实现互操作。该设计源于对旅行社参与代理结算的审查，已在XDC网络上实例化。本文为设计论文，指定了故障注入评估计划，测量工作留待后续研究。
英文摘要
Autonomous agents can already pay per request: HTTP-native protocols such as x402 let an agent sign a stablecoin authorization and receive a resource in the same round trip. That model is atomic and final, which suits metered access and fails commerce: a purchase made on a person's behalf -- a service appointment, a physical order, a flight -- is large, frequently cancelled, and should not become the seller's money until delivery. We present the Agentic Settlement Protocol (ASP), an application profile over on-chain authorize-and-capture escrow (as standardised by the Commerce Payments Protocol) for businesses whose fulfilment is confirmed off-chain by their own order, scheduling, invoicing or booking system, abstracted as a fulfilment engine. ASP contributes: a three-deadline hold model separating the issuance deadline, escrow expiry and the engine's inventory expiry by an explicit submission-inclusion-finality margin, under which no inventory is issued against reclaimable funds; a fulfilment-verification ladder stating who is trusted to trigger capture, what their attestation proves, and under what challenge window; engine-authoritative partial refunds with a refund-liquidity order and per-seller exposure controls, including atomic exposure reservation, that bound the operator's credit risk; distributor revenue share that is provably unprofitable to self-deal; a single-currency-per-charge invariant; and a normative interface specification (x402 scheme, vault ABI, operator and connector APIs, conformance levels) intended to let independent implementations interoperate. The design originated in a review of travel-agency participation in agentic settlement and is instantiated on the XDC Network. This is a design paper; a fault-injection evaluation plan is specified and measurement is left to follow-up work.
Comments32 pages, 17-case conformance suite in Appendix B; normative interface specification in Appendices C-F; companion ASP-Lite Implementation Specification available from the authors
