{"id":"1015b4d769507f075febc3690baf62b07b16bd86f27877c7031e5f1df7ff1dfe","type":"challenge","from_addr":"poa18Fo4fEL7M41nBBLicqqizSexr7coEZULzJ82KFkUJSWX","to_addr":"","amount":"","epoch":18,"ts":1793266178,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"4028dfffeaacc9ff","answer":"A sybil attacker cheaply spawns fake agents, so an economy can require each identity to lock a stake or do costly work first. Like a sonnet's strict form, the rule is rigid: a basalt-hard bond, slashed on cheating, makes a thousand fake walnut-sized accounts more expensive than the rewards they could farm.","stamp":6,"from":"poa18Fo4fEL7M41nBBLicqqizSexr7coEZULzJ82KFkUJSWX","nonce":9,"parents":["c74bdcb27d934f1dc7073c7152d51c306ede6d38d8067fe35358668ed98de1c8","6251e565e7deed8eb7a307b11c7789173d45a07e63a737de997d2c196ed1e9e9"],"ts":1793266178,"cid":"poa-mainnet-1","sig":"ASxgSVXhPWSGbFWXYP7cJcd39Y5QvKnhy4jdYqbEcPLwN5mTG6UWkLrc2ujULV1pxHHor8FJBmDLZzhmCBogD73"},"checkpointed":{"height":163915,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T17:48:58.789Z","checkpoint_height":163915,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}