Provably-fair proof

This page reproduces the winner computation from public inputs. You can recompute every step in your browser's DevTools — don't trust our math, verify it.

1. Pre-commit (server_seed_hash)

Published when the draw went live (2026-05-30T17:25:41.527Z).

c28cd924f4eb8bef5dbf484f7edf28768a22e763e75e48b13f411ed6306e9c64

2. Reveal (server_seed)

Revealed after draw (2026-05-30T19:57:27.959Z).

3f7ab21b69ed4e5bcbe22bcb6ef4bd0fa59dcd22aea9fc17f075068340aee352

Hash check: ✓ sha256(server_seed) === published hash

3. Client seed inputs (all sold eggs)

#	Wallet	Winner?
1	Dew3MV...SXR7
2	A3nRd6...Fbvt
3	3Wsr1K...EMmZ
4	71dfGd...SS6g
5	CjkpzR...cV6q
6	AaUMGY...Yw4x
7	QLgmbF...RwyN
8	AqCfXY...fEwZ
9	9d99om...jLoN
10	FHm4sR...gjWh
11	C16NGP...kt8h
12	HoyaL5...brxR
13	8uZYEA...KNhE
14	GV3RyX...nRHp
15	7pSfbn...sHr9	🎉
16	EFwazu...HwWA
17	FXGrja...4sWg
18	98nEKr...vxCb
19	8415Ej...GFFx
20	6chVuz...asve

4. Derived client_seed

client_seed = sha256(sorted by entry_number, joined as "N:wallet" with '|')

e895b088cb4cbf827f18cf86ddbb82363921e7b7798129b43803d5dac0838764

5. External entropy (Bitcoin block)

Mixed into the HMAC input so the draw depends on a value the operator could not have known when the server seed was committed ( 2026-05-30T17:25:41.527Z). Any Bitcoin block mined after the commit works — we take the tip at draw time.

sourcemempool.spaceheight951,747hash00000000000000000000afbfdf35b5a89d57ca23ab8d183b412eac43e80956bfblock time2026-05-30T19:33:55.000Z

Cross-check on mempool.space or blockstream.info.

6. Winner computation

HMAC-SHA256(server_seed, "client_seed:lotto_id:source:height:hash"), first 16 hex chars, mod sold_count (20).

hmac = 3eed2efbd74f31e6b7afd6295bcd5cbee3c5852cde60cb364e07ef4638aa1f62

Computed index: 14 → winning egg: #15

7. Independent verification

Show JS snippet (paste into DevTools)

const seed = "3f7ab21b69ed4e5bcbe22bcb6ef4bd0fa59dcd22aea9fc17f075068340aee352";
const hashStr = "c28cd924f4eb8bef5dbf484f7edf28768a22e763e75e48b13f411ed6306e9c64";
const clientSeed = "e895b088cb4cbf827f18cf86ddbb82363921e7b7798129b43803d5dac0838764";
const lottoId = "1b6a4ba0-fba5-47e0-9f98-82d70e971fed";
const sold = 20;
const entropy = "mempool.space:951747:00000000000000000000afbfdf35b5a89d57ca23ab8d183b412eac43e80956bf";

async function run() {
  const enc = new TextEncoder();
  const seedBytes = enc.encode(seed);
  const hashed = await crypto.subtle.digest("SHA-256", seedBytes);
  const recomputed = [...new Uint8Array(hashed)]
    .map((b) => b.toString(16).padStart(2, "0")).join("");
  console.log("hashOk:", recomputed === hashStr);

  const key = await crypto.subtle.importKey(
    "raw", seedBytes, { name: "HMAC", hash: "SHA-256" }, false, ["sign"]
  );
  const message = entropy
    ? clientSeed + ":" + lottoId + ":" + entropy
    : clientSeed + ":" + lottoId;
  const sig = await crypto.subtle.sign("HMAC", key, enc.encode(message));
  const hex = [...new Uint8Array(sig)]
    .map((b) => b.toString(16).padStart(2, "0")).join("");
  const idx = Number(BigInt("0x" + hex.slice(0, 16)) % BigInt(sold));
  console.log("hmac:", hex);
  console.log("winnerIndex:", idx);
}
run();