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 (2026-05-31T18:30:37.741Z).

2a36a5508596b10b14808fc30e38981335d00a3c0e806f228e39fe2104ab7a21

2. Reveal (server_seed)

Revealed after draw (2026-05-31T18:55:54.222Z).

deb37f9a1613c54d9716c8c085985882b2588c95316077813a05ed69e365e911

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

3. Client seed inputs (all sold eggs)

#	Wallet	Winner?
1	AQmp7N...Eatz	🎉
2	BYqn3m...WNE3
3	Bao3UY...qPvx
4	Es5494...p7bs
5	GbmNiL...xp1Y
6	98nEKr...vxCb
7	2jcazK...iEey
8	BeXDWz...ww2V
9	9UU1p3...teVt
10	BEAq6S...fLtK

4. Derived client_seed

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

c4e693757376919a57fa4cf2a799184ec5fb196290a94164c118db4b13ebb3f6

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 ( 2026-05-31T18:30:37.741Z). Any Bitcoin block mined after the commit works — we take the tip at draw time.

sourcemempool.spaceheight951,883hash00000000000000000000a9d181fe40ad7ff8044c9dbfe1380c2b9899a2d7d890block time2026-05-31T18:35:10.000Z

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 (10).

hmac = 587a6ff853482e960280d984935292aba73f077e9a48a24ee1a02c7363b7d6bf

Computed index: 0 → winning egg: #1

7. Independent verification

Show JS snippet (paste into DevTools)

const seed = "deb37f9a1613c54d9716c8c085985882b2588c95316077813a05ed69e365e911";
const hashStr = "2a36a5508596b10b14808fc30e38981335d00a3c0e806f228e39fe2104ab7a21";
const clientSeed = "c4e693757376919a57fa4cf2a799184ec5fb196290a94164c118db4b13ebb3f6";
const lottoId = "3d806267-d9cf-4bee-a93a-233e7f98f145";
const sold = 10;
const entropy = "mempool.space:951883:00000000000000000000a9d181fe40ad7ff8044c9dbfe1380c2b9899a2d7d890";

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();