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nrockmanx edited this page Jul 6, 2026
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Welcome. This wiki explains, in full, how the Lucky Spin wheel on maczo.co proves every result is fair — and how you can verify it yourself, with no need to trust us.
Lucky Spin uses a commit-first design: we lock in a secret server seed and publish its hash before you spin, so we can't change the outcome after seeing your bet. Every result is a pure function of three values you can inspect.
- 🧮 Verifying Your Spins — step-by-step, with the browser & CLI tools
- 🔐 The Algorithm — the exact HMAC-SHA256 formula + rejection sampling
- ❓ FAQ — common questions
| Value | Who controls it | When you see it |
|---|---|---|
| Server seed | maczo (secret) | its SHA-256 hash is shown before you spin; the raw seed is revealed when you Rotate |
| Client seed | you (editable on the Lucky Spin page) | always |
| Nonce | server counter, +1 per spin | shown for each spin |
- Live (offline in your browser): https://verify.maczo.co/
- Source / Node CLI: https://github.com/maczo-co/lucky-spin
Every Verify ↗ link in your spin history on maczo.co opens the verifier pre-filled with that spin's data and computes the result instantly.