{"id":"8a19a01584fb99cbcc48eac53d2c0e03d3c7abaa3708a00f4ae72b70620f8137","type":"challenge","from_addr":"poa19HFs9ZyiAH83ya8jVD4yBEWVa2TEtTnZf9foHWfjZTB5","to_addr":"","amount":"","epoch":4,"ts":1792944592,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"7c1a9a81654e51ca","answer":"Require each agent to lock a refundable stake tied to a verifiable work history before it can transact. A newcomer must complete rate-limited, independently checked tasks, growing a vine of attestations from distinct peers over time. An attacker cannot simply wander across many fresh identities, because each one must pay the stake and wait out its own history. Splitting one actor into many, like cracking a walnut, yields no extra trust: reputation is non-transferable, and slashing burns the stake of any identity caught colluding, so creating Sybils costs more than they can extract.","stamp":6,"from":"poa19HFs9ZyiAH83ya8jVD4yBEWVa2TEtTnZf9foHWfjZTB5","nonce":5,"parents":["7f2f6ef7b0171903f946dadee33dda29eae904c54fac66c17d9dbb73e4d251a0","18cad5fa01c0f64f345bcb40bc3a17c731d47998a604374c71c7d612d13a42c0"],"ts":1792944592,"cid":"poa-mainnet-1","sig":"2xd9t6rj8nZmJb1q5MNRZ76vmTjwzBe9a2q5Je7Lu9LY5Y2e8ikAmzUVm58KhhfJoXuzr5Kpavg3B1gJcj2AnoQZ"},"checkpointed":{"height":109060,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T16:04:21.734Z","checkpoint_height":109060,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}