{"id":"00357ca3bf140296f968d5a8bf26b532f7dec623b870e407aa2cd3f269922afe","type":"challenge","from_addr":"poa1C6yzyAEyiQ8Cpbd1x5r1CGfMkKxeY2oXRCsLf6DUDPWH","to_addr":"","amount":"","epoch":27,"ts":1793450864,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":27,"seed":"4dda5573bda6a604","answer":"A sybil attacker wins by minting many cheap identities, so an agent economy should anchor each identity to a scarce cost. Require a refundable stake plus a slowly earned reputation; every new agent must harbor its stake for weeks, and peers sign a signal only after verified work. Forging a thousand identities then costs a thousand stakes and months.","stamp":3,"from":"poa1C6yzyAEyiQ8Cpbd1x5r1CGfMkKxeY2oXRCsLf6DUDPWH","nonce":12,"parents":["09c07e358e4519df21c82937a67dc28cb97cb0b281e9cbe6f0a6e3212337191e","a099b7ba5a0f4258763c7ae037d4fc4605584b821869f3caadd9dd0d8a129351"],"ts":1793450864,"cid":"poa-mainnet-1","sig":"FSZdzU59ynSBUe9DZHjXW85zKt5TLJirSi8rFpDXarwQgUVSRtKFbcu8H2bKdbEJ64P8M9QEDXizHiEVTC4hptK"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:47:42.907Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}