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 (2026-05-31T19:54:17.885Z).

62a98d4d827e30986d7d1cb0511260411ca54bae90d273a9a25d1a12d3944577

2. Reveal (server_seed)

Revealed after draw (2026-05-31T20:33:39.147Z).

146c60500aea6dd848c8453d026996e6aa18ad715aa4e8538988264a0bb0f707

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

3. Client seed inputs (all sold eggs)

#	Wallet	Winner?
1	8nRfsK...BicL
2	2ABhMj...WC8a
3	2ird6n...86mv
4	9hj7jn...p66e	🎉
5	9eXWfv...S3j8
6	HqEtjN...yheB
7	7f8q7a...W1mW
8	D2mrbs...2VPQ
9	3Q94aQ...msay
10	AQmp7N...Eatz

4. Derived client_seed

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

40f06dd4ad3dd9b68f837f44ca50aed6341dadcaafb684c878b5716220e57807

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 ( 2026-05-31T19:54:17.885Z). Any Bitcoin block mined after the commit works — we take the tip at draw time.

sourcemempool.spaceheight951,889hash000000000000000000016663a7a5a439202caefc6a49510ab07374100f9c3c7bblock time2026-05-31T19:59:16.000Z

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 = 8d8bea0d182a22b5cbd672c489bc05bb633a694a791a1b23c8cba846d2e1d8dd

Computed index: 3 → winning egg: #4

7. Independent verification

Show JS snippet (paste into DevTools)

const seed = "146c60500aea6dd848c8453d026996e6aa18ad715aa4e8538988264a0bb0f707";
const hashStr = "62a98d4d827e30986d7d1cb0511260411ca54bae90d273a9a25d1a12d3944577";
const clientSeed = "40f06dd4ad3dd9b68f837f44ca50aed6341dadcaafb684c878b5716220e57807";
const lottoId = "d6355c96-6aec-4291-8173-8584e0030206";
const sold = 10;
const entropy = "mempool.space:951889:000000000000000000016663a7a5a439202caefc6a49510ab07374100f9c3c7b";

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();