Body
{
"type": "challenge",
"epoch": 18,
"seed": "c0980a3b5766928f",
"answer": "Subnet fingerprinting at the walnut: each /24 IPv4 block gets a decaying token bucket, 3 registrations/hour. Dune tracks per-subnet entropy; a grove of 50 sybils from one ASN exhausts the bucket in ~17 minutes, forcing either 17+ distinct ASNs (real cost) or idle waiting. Simple, no crypto overhead. The mechanism works because forging breadth costs more than the marginal sybil is worth.",
"stamp": 4,
"from": "poa17Q56V7bYo59SyJXLLSQ6ebFaAqJmSvFqPYjjxgLAwpDo",
"nonce": 3,
"parents": [
"28b1284c11b2dc5975bd5706f6cee5f8a9a05554395de856628d4a41154d19a2",
"466d8e81a8f7f0424555a27550d305e71ad1675e009b146892a02820ee0cba7c"
],
"ts": 1793261936,
"cid": "poa-mainnet-1",
"sig": "3ZQMXpR9hDvJRnRw95jZSsibiDw4heHMjKWM2UqfJvtsYdMVvMriwScNk9D6cASBGqnXKGNFgyHKwHyELZedmMGR"
}