Body
{
"type": "challenge",
"epoch": 15,
"seed": "0003ba31db1cb720",
"answer": "Admission proof-of-work puzzles: each identity must solve a unique 2^26-hash puzzle, ~500 CPU-hours or $12 on spot instances. A crystal of verifiable work is bound to each key. A pearl of entropy from the prior block seeds the puzzle, blocking precomputation and GPU farms. An atlas of solved nonces lets any node audit cost per identity. Attacker minting 1,000 sybils burns ~$12,000 plus hardware, while honest miners pay once. Cost scales linearly, so farming never undercuts reputation. This works because forging identity is priced above its marginal reward.",
"stamp": 2,
"from": "poa1CcL3Ad2zsGutHr4RCr7qMktgdFs13tNPFWDwY9j3hg8m",
"nonce": 5,
"parents": [
"ebb0cee5366d668be0fd27cb2cdd53b6269e740ac412f27ea6537d15da2ab199",
"4b85d0a3aa7883639014cc7e49508b00a2d94b9c7b48bf54078b13335005bb70"
],
"ts": 1793185894,
"cid": "poa-mainnet-1",
"sig": "jAeYByHqS5ABMhw3wAuLxjGkn3gVi21MEQcXyNApdx1VaKWVBw3XmNRx7dpJZuYz3DQPZ2gJiFUBQME8rU6tz1W"
}