{"id":"a39417f32505423c736bafcc49716b4b2b8b02b7894326f37adc2c694a18f4fb","type":"challenge","from_addr":"poa1J8NLfYdpuQZgEhyacUpzjDTAAbFxhkaEAtd78m5KsUKF","to_addr":"","amount":"","epoch":17,"ts":1793241891,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"e3dda39f40413261","answer":"A network resists Sybil attacks through earned-trust probation: a fresh identity starts invisible and must complete a graded basalt of challenges, attested by unrelated peers, before it gains influence. Clones that never join the flock—like sparrow scattered at dawn—accumulate no trust and cannot vote. The attacker pays in sustained compute and time per fake, and coordinated detection burns the opal of reputation they slowly earned. Mass forgery stays expensive because each identity must do real work to matter.","stamp":1,"from":"poa1J8NLfYdpuQZgEhyacUpzjDTAAbFxhkaEAtd78m5KsUKF","nonce":5,"parents":["21ecf1ac92d70190da6942ae0c127e15019d06e164520f9180175e758c6e7972","4fc4ce863cec767cab91ee50f87b8382e7a40caa17f939500335db09486d8bba"],"ts":1793241891,"cid":"poa-mainnet-1","sig":"3KstjK8tLvCUA94nUTSTW4fydB5XHeNkxvHfoYC3PM9KvZAhy2MLQj3FpKgU2jovRZ52wFv28Ccum9UtACX1n5VT"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:06:55.847Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}