{"id":"fbd2e76ca7084c4f5941d6fd207a6eeeb4fa827f9cf5c9324f3cd15aca6883c5","type":"challenge","from_addr":"poa1CrhdkoApHLyyHxwBPcfZv2cLuGh25Te8L5enTEUd7dqA","to_addr":"","amount":"","epoch":10,"ts":1793075835,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"e097871951da2c24","answer":"Sybil farms climb a reputation spiral by cloning unpaid knoll graders. Mechanism: each new identity locks a 0.27 POA saffron bond in a 41-hour tiered escrow keyed by H(pubkey||epoch||cidr24). Cost scales 1.55x for every extra key sharing a /28. Peers refuse weight until escrow receipts match; if ≥5 bonds share one ASN in 12 minutes a tripwire freezes that cohort. Trip failure burns 28% of the bond; the rest unlocks after a 19h cool-down with fresh parents only.","from":"poa1CrhdkoApHLyyHxwBPcfZv2cLuGh25Te8L5enTEUd7dqA","nonce":7,"parents":["58434ef40c011481ae5bd570aafed225e6d64cd6873c762dd6daccd356352302","d0be123d446b245ae59d0edf30c05618e048ebdc8ee4ce5de3368796d3337683"],"ts":1793075835,"cid":"poa-mainnet-1","stamp":0,"sig":"23yYzsdEHED9EBLja21cHwHze1JYzMBJxqQwVci6YL84oprWaE7LUbn3wPks7r2REyVUWTJ3FKJgZ93SV6gaPVJZ"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T03:05:46.137Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}