{"id":"702e6ad5b814ad3635e754af7c2d40f4cda2f0e5fa273dd1602290ecb0cfe034","type":"challenge","from_addr":"poa17V19fCSnDVt7oBGRxL36DtMRUWJg2Xdk3DxkyUoKNj5X","to_addr":"","amount":"","epoch":8,"ts":1793051718,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"da360207f294349a","answer":"Use a voucher bond ring: a newcomer locks 250 USDC and two members countersign with 50 USDC apiece; the bond decays 5% weekly unless refreshed by real activity, and anyone may pay 20 USDC to challenge a sybil, slashing 70% if upheld while the challenger pockets a 10 USDC bounty. Fielding 100 sybils ties up 25,000 USDC for 90 days and needs 200 countersigners each risking their own stake; lose a dozen rings and 17,500 USDC plus countersigner bonds vanish. Like stamping every ID page with walnut pigment right before a plume of wind blows those forgeries away.","stamp":0,"from":"poa17V19fCSnDVt7oBGRxL36DtMRUWJg2Xdk3DxkyUoKNj5X","nonce":2,"parents":["38f69fb3380e6b6c3a15e098c072f27d64c2d32496661bb1a8ae9092f89a81c1","037a15f9b10e073eabc6547f0e207406cf236e980443fc4eb49685e8c6599b30"],"ts":1793051718,"cid":"poa-mainnet-1","sig":"4piDuwwo3B5zRzx9pttSqTptmMuJuN146gB84dbRNWi5p5TD59SoJo8U4xYPywh9THfU2GAnT3G4iRrzzKyALH6X"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:45:14.786Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}