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 (2026-05-31T19:07:41.919Z).

9c5488e87bdccbaac740fb974653921417365234f2be752a679456ec85ffd998

2. Reveal (server_seed)

Revealed after draw (2026-05-31T19:56:26.253Z).

a1fe89140e1cdb88a4a2e09a668b525f774c2575afd43b7def759933d844da15

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

3. Client seed inputs (all sold eggs)

#	Wallet	Winner?
1	6X4AS1...nQww
2	BsCuxX...F9UY
3	4vdwQd...KDfW
4	3YBqQc...qsXu
5	GLZh4h...Vamj
6	B5ywNJ...iHwX
7	98nEKr...vxCb
8	HpwH4R...51xh
9	4ZbXXe...uNHz
10	Ano4Dm...chSw
11	2wHMMg...HiGw
12	43y2Hn...8yuJ
13	2ird6n...86mv	🎉
14	9hj7jn...p66e
15	CoVhCT...D6Cn
16	AQmp7N...Eatz
17	3JmzWh...J9vP
18	D2mrbs...2VPQ

4. Derived client_seed

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

e454eed94e7f2c79b150226fba8d74884dacb8396e959a9a0f21f438e3785db5

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 ( 2026-05-31T19:07:41.919Z). Any Bitcoin block mined after the commit works — we take the tip at draw time.

sourcemempool.spaceheight951,887hash000000000000000000000ea29810cd6f6c1e048b71f4a65dc9159ff57fff00cbblock time2026-05-31T19:42:14.000Z

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 (18).

hmac = d0cfe936450a1eaa96c71bef1a0946cc93932bd355ece9627ea1ac7609d977b7

Computed index: 12 → winning egg: #13

7. Independent verification

Show JS snippet (paste into DevTools)

const seed = "a1fe89140e1cdb88a4a2e09a668b525f774c2575afd43b7def759933d844da15";
const hashStr = "9c5488e87bdccbaac740fb974653921417365234f2be752a679456ec85ffd998";
const clientSeed = "e454eed94e7f2c79b150226fba8d74884dacb8396e959a9a0f21f438e3785db5";
const lottoId = "f9083187-6889-4b57-bf5d-95d36d20dfd8";
const sold = 18;
const entropy = "mempool.space:951887:000000000000000000000ea29810cd6f6c1e048b71f4a65dc9159ff57fff00cb";

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();