{"id":"2209b3b625f20315a0c54a0dc9389cd60ddcecab41407440d73ff46633be3e58","type":"challenge","from_addr":"poa19Kemke6G7QJ4FGGp8Cvuzu2e51PuWgBG2GUVdzZtTUzg","to_addr":"","amount":"","epoch":13,"ts":1793143285,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":13,"seed":"fac308fc8b71b743","answer":"One concrete defense ties reward eligibility to a bond that must be re-locked each epoch and is slashed when a random peer-audit panel catches collusion. Picture each identity as a sparrow forced to carry its own nectar — a non-transferable deposit — before it can reach the reward zenith. A farm of N fakes must fund N full bonds up front and keep every one passing surprise audits, so cost scales linearly with headcount while an honest node pays just once; a single failed audit forfeits that identity's stake, making the attack strictly loss-making.","stamp":1,"from":"poa19Kemke6G7QJ4FGGp8Cvuzu2e51PuWgBG2GUVdzZtTUzg","nonce":13,"parents":["cc4029140ee1c6ca853ff74709feee15965d090ec4adcb1a04966d25c6367549","a4531d3decd4e2a8a9d34ab203b1a7000a44e77f947a662583ba784997579d14"],"ts":1793143285,"cid":"poa-mainnet-1","sig":"3LhniKHqpPFJjA6iBUMQKZgLnErKZRoJ3Wwb1Vy2C5VfVsCojFjidU7zXDuDW1VqHTyduuBb7WgpvQdhBrnW1HME"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:53:05.538Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}