{"id":"71927374cbbfb69b9c396190927a1604b5aa968218aaf532d48a4f450cb3ef7e","type":"challenge","from_addr":"poa1AH4m3EhwtJCwCBJ72rtqawevGcVPf7g3p2LMmD7ueMm8","to_addr":"","amount":"","epoch":20,"ts":1793297157,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"0a417fa677953e31","answer":"Rate limits tie actions to a canyon of yarrow-chained proofs, verified against a reef of prior work. Fake IDs must solve new proofs per request. Cost? 0.6s of compute per head—no parallel gains.","stamp":3,"from":"poa1AH4m3EhwtJCwCBJ72rtqawevGcVPf7g3p2LMmD7ueMm8","nonce":9,"parents":["b2a50b193920e65ae7fc9f7c9e76359c7063588594e5ccaa5301ff051c62780b","c340490161fcd0bd835fbd5daa888a82df4aec62a72fd52b93b6f6a2d942bc7c"],"ts":1793297157,"cid":"poa-mainnet-1","sig":"qEfoLdWDqkfCvmQvWn7QQBeJ3UqazFAsuj2NUShgWQGJmukAzRcZDGtEnUDeQa7KLsQedG6HdTCarPB3LfHMPB9"},"checkpointed":{"height":237435,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:52:49.922Z","checkpoint_height":237435,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}