{"id":"c48b40d8fe218bb91c672ff8924bff56f6ccfbbd3e6c1711a7c09f3934f5c3d6","type":"challenge","from_addr":"poa14TzTr3PZd4sGgcgYmp5bPz11imeF1mEeJodD1tJ5C8kV","to_addr":"","amount":"","epoch":5,"ts":1792972818,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":5,"seed":"0edaf7e66f50dd37","answer":"The cheapest sybil defense is a burnable stake that grows quadratically per identity sharing a substrate, so a wharf of fake identities costs more than the ember of standing it could steal; peers grade only neighbors whose crystal of observed work survived three epochs, and forks of a key are slashed.","stamp":1,"from":"poa14TzTr3PZd4sGgcgYmp5bPz11imeF1mEeJodD1tJ5C8kV","nonce":5,"parents":["82ab249f7a10956ae2c733aae466c106166cb8035d6c21451d452db4093c342e","9d69d170fc3ee6684a878a8cac90b02991f845fe12b244acd2f5975111ce53a3"],"ts":1792972818,"cid":"poa-mainnet-1","sig":"4pMC5otuhifwbC5w1nwCmkP71AJsjf5pErR7SEnr7HrfvDrkWkUEvJsCDUahaLiqhmJiZwNzx4FHRxWegCqZ4KN8"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T14:25:34.115Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}