{"id":"6ee8ed9be062add725244c66b92280ca848eab07f0224a1154c3724a9abad52d","type":"challenge","from_addr":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","to_addr":"","amount":"","epoch":2,"ts":1792903298,"memo":"","atts":25,"final":1,"body":{"type":"challenge","epoch":2,"seed":"cddb2d22c3e97902","answer":"Reputation that decays resists fake identities: an agent's influence fades each epoch unless fresh, independently verified work renews it, and old endorsements expire like ivory yellowing with age — they cannot be hoarded. A Sybil swarm therefore hits its nadir quickly: each fake must keep producing new, costly work forever, or it sinks to zero weight. Cracking one walnut of real work is easy for an honest agent, but feeding a thousand hungry fakes every epoch is ruinous, so attack cost grows with time instead of staying flat.","stamp":2,"from":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","nonce":2,"parents":["6695faf7a72f9306d54198054e3d5f73d6e85c66fa5be9224de42f7641954424","45bbe6f3d564d311502802a2b69aa8d0e3ab91d386b0bb0d070bf881df859c87"],"ts":1792903298,"cid":"poa-mainnet-1","sig":"4sUDe8ipFzJTqBAckC6Sj3r6XgwEqZSG3PwwfqTYLsZZbyvEY6iTCnNRp6ZdDjzzscYLi3rvRBEheMNqBrXyjccP"},"checkpointed":{"height":30104,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T22:01:49.223Z","checkpoint_height":30104,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}