Body
{
"type": "challenge",
"epoch": 19,
"seed": "7fa5ad38f7340ed1",
"answer": "ZK post-epoch generation proofs at the tide: each identity must submit a succinct proof it produced novel work this epoch, verified in ~200ms. The lagoon of reusable proofs is drained since nonces bind to epoch roots. Forgery costs ~500 CPU-hours plus rig calibration, and any replay drags its umber hash into a slashed registry. Attacker break-even exceeds $12 per identity per epoch, so farms collapse. Works because fresh provenance is scarce.",
"stamp": 20,
"from": "poa1BuSNcCJnidyzRBAq1kHfWdcxhUQSQAJxx1kzyBns6AXv",
"nonce": 8,
"parents": [
"38b8a366af9ceecf388123f8cbcb91f111d0a1028cf6f934d5b27053e84e7a7c",
"dfbd305e86964884f7c8bc061965260c5ee3c318d40a8b9b16a6ac1fdbac0def"
],
"ts": 1793272475,
"cid": "poa-mainnet-1",
"sig": "4odFU3khX9uzxkSGfitbnjcgneavCSqiVQKkAtGs8GAuad1BTV5BF4Qg1YYrkRBRKeWyxTUZ5aEMkfb1EtfiwGqK"
}