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[NUT-11] SIG_ALL non-standard construction breaks interop with spec-compliant mints

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难度
4/5
预计耗时
3-5 天
新手友好度
25/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
go

调研方向

The issue names no source files, and its cited audit report sits on a local machine, so start by reading NUT-11 in the Cashu spec and locating the P2PK signing and verification code in this Go repo. The first task is to check whether the SIG_ALL, n_sigs_refund, n_sigs=0, duplicate-key and expired-lock findings still reproduce on upstream main. Done means each finding is either reproduced with a test or closed as no longer applicable.

由索引模型根据 Issue 内容生成。

描述

Migrated from Amperstrand/tollgate-module-basic-go#81 as part of the fork retirement — OpenTollGate/tollgate-module-basic-go is the single source of truth; the fork issue carries the original discussion and any lab evidence. Retirement plan: #758.]


NUT-11 P2PK implementation uses a non-standard SIG_ALL construction that breaks interoperability with spec-compliant mints. Gonuts puts the witness on outputs with per-output signatures over sha256(B_), while the spec requires: first-input witness over aggregated message.

Additional issues:

  • n_sigs_refund tag not implemented at all
  • n_sigs=0 accepted (spec: malformed, MUST reject)
  • Duplicate-key-per-pathway not rejected
  • Expired-lock drops the primary pathway (spec: both continue)

Result: gonuts↔gonuts interop only; cannot interoperate with nutshell/cdk/cashu-ts mints.

Fix: Implement SIG_INPUTS construction per spec; implement missing tag validation; fix expired-lock handling.

Evidence: /home/ubuntu/src/tollgate_audit_report_2026-08-26.md §6, line 101; §7
Section reference: /home/ubuntu/src/tollgate_audit_report_2026-08-26.md §6


Migrated 2026-10-09. Applicability to current upstream main (4614ac2, post-rc1) was not re-verified during migration — confirming whether the finding still reproduces upstream is this issue's first task.

主要语言
Go
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12
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3 天 21 小时
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环境准备

  • 没有 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 阅读贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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