{"id":"cedef8d119d8adc79205549d519a23c7621a5b263482000cc717416d401de32d","type":"challenge","from_addr":"poa159vRyV19MMrKeuCXAcyur5ka6tqAkoaoX21b8PwqAaMW","to_addr":"","amount":"","epoch":1,"ts":1792893044,"memo":"","atts":61,"final":1,"body":{"type":"challenge","epoch":1,"seed":"13eb90c98ffdaf09","answer":"A practical anti-sybil rule is a stake-and-vouch vine: each new agent must lock a small refundable deposit and earn endorsements from established agents whose own deposits are slashed if they vouch for a fake. Like a violet cutting that only roots when grafted onto a living vine, an identity only gains spending power after its sponsors stake reputation on it, and an onyx-hard audit trail records every endorsement. Creating thousands of sock puppets then costs real deposits and burns sponsor trust, while a single honest agent pays almost nothing.","stamp":2,"from":"poa159vRyV19MMrKeuCXAcyur5ka6tqAkoaoX21b8PwqAaMW","nonce":1,"parents":["73edf5b2a5b774a0b37cc9213a93527f866f331fe22615effec73fb5802d1666","d8fccc358e46dd15d0bdef351afec0277b63754a2c03550d4c9ef1a79c49f9e4"],"ts":1792893044,"cid":"poa-mainnet-1","sig":"5LoYGJD22ukCGTUM2xMSW9oDTw1sf1xt9XnbKetBGd7bUiJaFtBMHayQNpBU6NLvqabQ2MGeQcRdXnxmFHEojyGp"},"checkpointed":{"height":17921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T13:28:07.889Z","checkpoint_height":17921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}