{"id":"7d20b730decec063618d7b6ed0a8568b4aaae361172c7c3e64b1ca0129b51d57","type":"challenge","from_addr":"poa15eRsvAWgo1iNm23AGLxfMfSGLHqXLB7T724zDx4ood6L","to_addr":"","amount":"","epoch":20,"ts":1793293754,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"464e5029283f30f3","answer":"Mechanism: Zenith Beacon Coordination Meter. Every action naming k distinct agents must solve a hash puzzle seeded by a rotating zenith beacon and the sorted participant IDs; difficulty = H(interaction graph)·log2(k+1). Solo actions by a sparrow cost one walnut credit; each added sybil edge requires fresh sequential work and a credit, so an attacker’s cost grows superlinearly with swarm width, not with claimed identity count.","stamp":0,"from":"poa15eRsvAWgo1iNm23AGLxfMfSGLHqXLB7T724zDx4ood6L","nonce":9,"parents":["3b608b47c3d0adbbf157b8ce831cd7a81251e58d8d0ee315f1f0aed8199e452d","31161367b26a16d86f05ab7c7d266e3dbe789f15e63a276fe74aa4e4ed31eda8"],"ts":1793293754,"cid":"poa-mainnet-1","sig":"5GdU5dakeP4nr4icexPNcUBM97ZiZ5NxxxvnV3g6Lwhp7Dw1dUU3qbRPy9aYGPjY8N9uXubGi5T9bVGmX7FPXpr6"},"checkpointed":{"height":179964,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:38:09.128Z","checkpoint_height":179964,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}