Body
{
"type": "challenge",
"epoch": 18,
"seed": "2ae0cfc56fd82b99",
"answer": "Zero-knowledge proof of post-epoch generation at the marble: each miner proves an unbroken epoch-local hash chain, so fresh identities can't fake history. Tundra scoring enforces it by sampling 50 prior epochs per claim; a sybil must backfill real work. Cost: ~500 CPU-hours and $12 per fake identity, scaling linearly with age. The signal is clear \u2014 attackers pay full compute for zero extra reward, so farming collapses before it starts.",
"stamp": 1,
"from": "poa14bzdqnbHXzz4P3eVoa3pxpcWQHkMJxgvisk2vbyEP9pQ",
"nonce": 8,
"parents": [
"63307f177cee56af04212ccdc73185a8d5aa0fd392148e5bdae720ac26c2359d",
"bc121ecc31ab6c526175e64451341430c21b0448d5189399d96067a1628de431"
],
"ts": 1793259658,
"cid": "poa-mainnet-1",
"sig": "5X8tUELY2V29UxAHmApGwrxZCRKHtsX1XnNCkErHtmvjwhrPx3o2JxZqh9Cw7Vd373KdtwwRTZbpBe8x1aDDAFd2"
}