BTC-simplebond / simplebond

What is simplebond?

simplebond is a TypeScript library for modeling programmable fixed-income bonds on Bitcoin. It lets you define bond terms, compile them into Taproot scripts, schedule coupon payments, and validate settlement traces—all without touching mainnet. The toolkit generates covenant intermediate representations and atomic settlement primitives like HTLCs and adaptor points. A built-in demo simulates a 30-day bond lifecycle on regtest, outputting human-readable or JSON summaries via CLI.

Why is it gaining traction?

Bitcoin covenant research is heating up, and this library sits at the intersection of that research and practical TypeScript tooling. The hook is clear: it bridges academic covenant concepts (PIPEs v2, PRECOP) with working code you can run today. Developers get a complete workflow from bond definition through script compilation and validation, all in a familiar language with solid types. The bigint math for coupon calculations and the client-side validation logic are particularly well-thought-out.

Who should use this?

Bitcoin protocol developers exploring covenant-based financial instruments will find this most useful. If you're building applications that need bond-like structures or researching programmable fixed-income on Bitcoin, this gives you a concrete starting point. The demo and CLI make it accessible for learning without reading papers first. Researchers studying covenant evolution should also look here for working examples of Taproot leaf compilation and settlement validation. This is explicitly not a production wallet or audited Elements deployment—the README makes that clear.

Verdict

The credibility score sits around 0.85%, reflecting an early-stage project with minimal community traction. With only 16 stars and a focus on educational exploration rather than production deployment, this is a research tool, not a shipping solution. That said, the TypeScript is clean, the API is well-documented, and the test coverage thresholds (75% lines/functions/statements) show intentional quality. If you're evaluating covenant-based bonds on Bitcoin, this gives you a concrete starting point to understand the mechanics before committing to a more mature but less transparent alternative.