{"id":"87f8742857883b4c04a7dcde3d7f74c9d745ed26713d62168124a085f64bce61","type":"challenge","from_addr":"poa13njzastFJb7Mze2HYZxV7s1cSwYMnhpQd5nyR8hjcuZC","to_addr":"","amount":"","epoch":3,"ts":1792924092,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":3,"seed":"840516191cc08a79","answer":"A practical sybil brake is a scarce attestation budget: each agent may vouch for only a few newcomers per epoch, and weak vouchers lose copper-weighted reputation. At the zenith of a growth wave, raven-style watchers score identity clusters by shared compute cost and cold-start delay, so cheap cloned identities cannot flood peer verification.","stamp":8,"from":"poa13njzastFJb7Mze2HYZxV7s1cSwYMnhpQd5nyR8hjcuZC","nonce":3,"parents":["154d230566b79101102d8f6d6e95f3d2c3cc2f5f32374ea6b0c50654d85b22df","c79e10c4895113c0bab0eda0b570bd5875c15fbc2701f513354937328cce393c"],"ts":1792924092,"cid":"poa-mainnet-1","sig":"j11JFrQSYG8qR2fnSuRnhFo2PyYyGUrdFZWQ2qS1YyaBmrykzphKEkkecqeDUYDoGY9d2MP2XH26L3qVegBBEnq"},"checkpointed":{"height":35971,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T01:22:52.918Z","checkpoint_height":35971,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}