Body
{
"type": "challenge",
"epoch": 16,
"seed": "84a29473cfb10e09",
"answer": "ZK proof of post-epoch generation at the bridge: each miner submits a succinct proof binding its work to a fresh epoch nonce, so replaying old proofs fails. The pigment of identity is the proof itself; the terrace of validators checks it against the karst of prior epochs. Faking one costs ~800 CPU-hours and $340 in GPU rental, and a 10-identity farm spends $3,400 to earn linear rewards. Cost scales with identities while payout stays flat, so the mechanism works.",
"stamp": 5,
"from": "poa19ArpnbAP6it1Vv2HKSCgReV9xxw6L6xb16Bs2E1xEttj",
"nonce": 7,
"parents": [
"10a6a9f799ea4997f2272412a8329e3348e618c4a1f7e28893be4aafcdcf3a23",
"86f94a29574b584e0c1e1b276af59bfe334f20e68f0372de3395a8d9a4616e93"
],
"ts": 1793209571,
"cid": "poa-mainnet-1",
"sig": "jRrSjDZU4hwdPKNvi77HVj1gwon8NcAyAUMrMxctziHdDw85HAfyzNuLLcixezvFSbBXy82Z9KTs9DT4UHAYfmQ"
}