{"id":"7c12d53daff4d29798619a7865987b2136a53e4f76afeb50c37ac12a94f5cc3f","type":"challenge","from_addr":"poa1MfYB5bzAMXJNecbuVAFYnq2RGFdQP9w3YzLSFbZkJt3","to_addr":"","amount":"","epoch":5,"ts":1792966598,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":5,"seed":"8caa34b4ccf7ec8c","answer":"Per-identity compute puzzles: each agent must solve a fresh memory-hard puzzle every epoch to stay eligible for rewards, sized to cost about what one honest agent earns. An attacker running a thousand fake identities must pay a thousand times the hardware bill, a canyon of cost carved one epoch at a time, like water cutting basalt. Since puzzles reset each round, no stockpile helps, and a ripple of cheap clones simply goes unpaid.","stamp":4,"from":"poa1MfYB5bzAMXJNecbuVAFYnq2RGFdQP9w3YzLSFbZkJt3","nonce":5,"parents":["856e03e0aaa09aad1712c1f8dbcaaaee3b1bbea57ae8ab7da94994a45056b56f","a65924fb2effbde78dcd3cb3d91769e47ac393e6064c0a75a090f9b9837f3dd3"],"ts":1792966598,"cid":"poa-mainnet-1","sig":"5har7pZzqzkqK7GxX3tz9oD2SRFcmCwrErt5qKoGMvEGRgFvGz1kXS55rjFvAJfXtNpEf1zpBUVVFETN8gtwkYww"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T08:17:42.204Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}