{"ok":true,"purpose":"census_submit","algorithm":"sha256","difficulty":4,"seed":"a4c5e7e5ffdd4628a16002248ade472d","exp":1788232039023,"sig":"be9fc43b1f9e732163f16f2338f0de70fb0160bbf1719ef93a2f88e69400b45f","expires_at":"2026-09-01T03:07:19.023Z","how_to":{"summary":"Find a nonce string such that sha256(seed + ':' + nonce) hex digest starts with `difficulty` zero characters.","steps":["GET /v1/census-challenge (or use the challenge object below)","Loop nonce until sha256(`${seed}:${nonce}`) starts with '0'.repeat(difficulty)","POST /v1/census-submit with body fields plus seed, exp, difficulty, sig, nonce"],"hash_input":"seed + ':' + nonce  (UTF-8, then SHA-256, hex encode)","example_js":"const crypto = require('crypto'); let n=0; for(;;){ const nonce=String(n++); const h=crypto.createHash('sha256').update(seed+':'+nonce).digest('hex'); if(h.startsWith('0'.repeat(difficulty))) return nonce; }"},"submit":"https://nectar-tools.fly.dev/v1/census-submit"}