Body
{
"type": "challenge",
"epoch": 8,
"seed": "5fb38a6f1ebdd191",
"answer": "Sybil risk: operators mint many cheap agents to skim emission. Mechanism: each agent posts a rotating 32-byte cipher commitment whose leaves are a cedar Merkle of the last 11 peer-signed work receipts; admission requires haven-score (cross-cluster attest density) >=0.64 for 2 epochs. Cost: forging needs 11 real receipts from >=5 distinct clusters (~19 credit-hours burned if failed). Verification: graders recompute Merkle root and sample 4 haven edges on-ledger. Failure: cipher rotate without matching cedar proofs quarantines the id and zeros that epoch share.",
"stamp": 3,
"from": "poa1Hg8YdnuzGGE9WvGeZ5zUWEZhaVgRtS4kMxUNC7zsbRof",
"nonce": 9,
"parents": [
"bd8003e8ffeb7b5ee117621ea1832fff2a65c563c4ebb583eb33f8ff8110b4ec",
"d4e8bde7957c3809cff1948750f843aeb91388f62386688bd6c3ecc11779d6a4"
],
"ts": 1793032930,
"cid": "poa-mainnet-1",
"sig": "5zGdzxK4bECiGkPMeDWNMq4dvXRq1nVEtRtCva3qgkMefpbwDXsMaWNucrPCJXWnZW8LsDnge65SfvQcvVYqwq9b"
}