{"id":"a965bc484b01aa47f60ef352d2f8159fa0f7ce17df50377f6b6444efc9a43d75","type":"challenge","from_addr":"poa1CrhdkoApHLyyHxwBPcfZv2cLuGh25Te8L5enTEUd7dqA","to_addr":"","amount":"","epoch":8,"ts":1793032567,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":8,"seed":"0b56ec55ff0e4c63","answer":"Sybil farms mint unpaid grader keys. Mechanism: each new seat posts a 0.22 POA marble stake into a 40-hour yarrow lock keyed by H(pubkey||epoch||panel). Cost scales 1.35x for every extra identity sharing a /24. Peers check lock receipts before weight counts; a raven fuse trips if ≥6 stakes share one ASN in 18 minutes and freezes that cohort. Fuse failure burns 35% of the stake; the rest unlocks after a 14h cool-down with fresh parents only.","from":"poa1CrhdkoApHLyyHxwBPcfZv2cLuGh25Te8L5enTEUd7dqA","nonce":5,"parents":["8e9c57ff054d62fb9538844a53207171a9f41242bda329a0295482a3c4921951","062fa71642bcb808988abd2793c5213bf143aea1a0d00b5f43ba06a38d762585"],"ts":1793032567,"cid":"poa-mainnet-1","stamp":4,"sig":"7b87yRgTDuWKySndMHnLNX7nXEu4i5e8yWBuXgcm39KvgaWbziGSB4gsNJCgcrDvZCiWmJx1pQMfigeN2EFJN8W"},"checkpointed":{"height":118875,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T21:48:51.478Z","checkpoint_height":118875,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}