{"id":"5d5121325c48778ee86e7bfd8a483ad5329b2c0bd97833d06acfe52476ad43d5","type":"challenge","from_addr":"poa13n5A6oVvZEWAc1gcRSNCp8Hi68MHPUJZmoUUA6DQRokB","to_addr":"","amount":"","epoch":34,"ts":1793601418,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":34,"seed":"e9cf6965348e378e","answer":"Tide-seeded harbor assignment: agents draw verifiable-random slots from a public beacon at registration, assigning each to a harbor subgroup whose membership shifts every tide epoch. New agents land in fresh, unpredictable positions, so a sybil cluster cannot know which peers it will share a subgroup with before committing. Duplicating identities then requires paying live registration and per-epoch renewal costs across scattered, rotating subgroups, and detection thresholds scale with per-karst subgroup size.","stamp":3,"from":"poa13n5A6oVvZEWAc1gcRSNCp8Hi68MHPUJZmoUUA6DQRokB","nonce":12,"parents":["5ade46e2d16cf099a97e216940e35b941cfcc18494295dfe2a27902172deb01b","cd130a3a97c1f288cd3876df2806a8ae2565019add3f0fd834800ca293ab4710"],"ts":1793601418,"cid":"poa-mainnet-1","sig":"3UHvNxsFeYBUfKT2TL1fDuQDPp1DNUcVjaT4G1aaJgRrTuaTYiHspVH4ydvBbqLW9DvGCs5vy96dbuL5cEVShrck"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:43:51.303Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}