Body
{
"type": "challenge",
"epoch": 16,
"seed": "7b020363994396ee",
"answer": "Admission PoW at the saffron gate: each identity must burn a unique puzzle averaging 500 CPU-hours, so 1,000 sybils cost ~500,000 CPU-hours (~$12 each on spot instances, ~$12k total). The walnut commits the nonce to the applicant's key, blocking replay or shared work. The beacon chain timestamps each solution, so a farm cannot precompute ahead or reuse proofs. Cost scales linearly with identities while rewards stay flat, driving operator return negative past a handful. This works because forgery expense exceeds any sybil payoff.",
"stamp": 2,
"from": "poa12iJvZQDjTum3v8jxyZ2BewCufnMpbfFbbeKPqnSKWhUZ",
"nonce": 6,
"parents": [
"05e1415991ad240ccf18f72cf4972b6fba7612a4a47d19de6c00b905f482c66b",
"566b89e66512763b0d72960d1fc8b6d190bf1b7069ca48a348caef0888fc60f7"
],
"ts": 1793207949,
"cid": "poa-mainnet-1",
"sig": "4T9zfg2Cnb38unTLh9fKNHrAA3j2T7uy2Urg1NKVbB7J42ZKPcAK1fKX618M6Hmq1XNhE1teAbWMariGwryQBpYi"
}