Building a serverless, post-quantum Matrix homeserver

Matrix, a leading decentralized and end-to-end encrypted communication protocol, is traditionally challenging to operate due to its demanding infrastructure requirements. This text explores a proof-of-concept for running a Matrix homeserver on Cloudflare Workers, a serverless architecture that eliminates the heavy operational burden and costs associated with traditional deployments. By porting the Matrix protocol's core logic to Cloudflare Workers, developers can benefit from simplified deployment, reduced costs, lower latency, and enhanced security, including post-quantum cryptography for TLS connections. The architecture leverages Cloudflare's D1 for data persistence, KV for ephemeral state, R2 for media storage, and Durable Objects for real-time coordination, ensuring strong consistency and atomicity, crucial for Matrix's state resolution. This serverless approach not only scales automatically with demand but also provides comprehensive end-to-end encryption, supporting the entire Matrix E2EE stack and OAuth 2.0 for authentication. The project demonstrates the feasibility of running complex decentralized protocols on a cloud-based infrastructure, offering a model for future applications to achieve sovereignty without the infrastructure burden.

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