E-VMAS

A protocol and API for anonymous payments on blockchains, designed for real-world deployment. E-VMAS (Epoch-based Verifiable Minimum Anonymity Set) lets anyone verify on-chain that a withdrawal is indistinguishable from at least k depositors.

Overview

• E-VMAS: Deposits are grouped into epoch-based commitment trees whose sizes are published on-chain. On withdrawal, users prove in zero knowledge that they belong to an epoch of size ≥ k_min, so third parties can verify a lower bound on the anonymity set.
• Deliverables: Protocol spec (spec/), API spec (api/), and reference implementation (circuits, contracts, client). Compliance (KYC/AML, Travel Rule) is handled outside the protocol by VASPs and applications.

How to Use

• Read the spec: See spec/ for the protocol and message formats.
• Inspect the API: Use api/openapi.yaml for deposit, withdraw, and related endpoints.
• Run the implementation: Follow the README in circuits/, contracts/, and client/ for build, test, and local runs.
• Read the paper: The paper PDF lives in paper/ when available. See paper/README.md for a short summary.

Docs

• Technical novelty & roadmap
• Research & strategy
• References & links