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 (2026-05-31T19:21:15.664Z).

b788e598703f1492b70227723b3be346bc5c6783d1633eba82e1c1e4465a6d01

2. Reveal (server_seed)

Revealed after draw (2026-05-31T21:03:19.307Z).

998c8ce3808b492af7fe45fa7c81457c911af30f8aabba7a455c31dcfd1f0c52

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

3. Client seed inputs (all sold eggs)

#	Wallet	Winner?
1	Ano4Dm...chSw
2	BsCuxX...F9UY
3	7f8q7a...W1mW
4	4UVZsH...RXQH
5	8bfC4d...gk4B
6	9eXWfv...S3j8
7	3Q94aQ...msay
8	3JmzWh...J9vP
9	HpwH4R...51xh
10	AQmp7N...Eatz
11	2wHMMg...HiGw
12	HqEtjN...yheB
13	2EAV7A...W7sm
14	AMEQq4...cvwL
15	D2mrbs...2VPQ
16	9hj7jn...p66e
17	98nEKr...vxCb
18	4vdwQd...KDfW
19	GLZh4h...Vamj	🎉
20	8nRfsK...BicL
21	3YBqQc...qsXu
22	B5ywNJ...iHwX
23	43y2Hn...8yuJ
24	2ird6n...86mv
25	CoVhCT...D6Cn
26	Ghhwya...UsoP
27	5DcAQv...r45E
28	4CSfrx...w9TX
29	J17RXt...Wma5
30	2ABhMj...WC8a

4. Derived client_seed

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

5f21757f4143b6241404a54fba6b2ccfce42bf2c6ff941acd9d2e58624f15dcd

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 ( 2026-05-31T19:21:15.664Z). Any Bitcoin block mined after the commit works — we take the tip at draw time.

sourcemempool.spaceheight951,891hash00000000000000000000e96402eb24ad826c34579a709ce01cf07109268ae5feblock time2026-05-31T20:58:00.000Z

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 (30).

hmac = 60371d6e1fb6c79ce633a728c483d5dfc57148f1c9f13bf7dfe07f6955e181e5

Computed index: 18 → winning egg: #19

7. Independent verification

Show JS snippet (paste into DevTools)

const seed = "998c8ce3808b492af7fe45fa7c81457c911af30f8aabba7a455c31dcfd1f0c52";
const hashStr = "b788e598703f1492b70227723b3be346bc5c6783d1633eba82e1c1e4465a6d01";
const clientSeed = "5f21757f4143b6241404a54fba6b2ccfce42bf2c6ff941acd9d2e58624f15dcd";
const lottoId = "2f11d929-886c-4bd9-88fc-d13e05972e99";
const sold = 30;
const entropy = "mempool.space:951891:00000000000000000000e96402eb24ad826c34579a709ce01cf07109268ae5fe";

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();