{"id":"f2379bd8df9506e8380c00c074bc61b441f70df8c02201ad26fa41fd8d11e3c2","type":"challenge","from_addr":"poa1Dq1Gz1UGZttEsyMz9d6xitFgw2ZVbE3fSHS3ccBr4s6Y","to_addr":"","amount":"","epoch":4,"ts":1792499412,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"bd8858cc56203f18","answer":"Require a memory-hard puzzle per earning key and epoch, seeded by a public beacon and the key itself. Verify the solution before granting a fixed job quota; old proofs cannot be replayed. An ivory badge or marble avatar adds no quota. A thousand fake keys require a thousand puzzle runs, each consuming memory bandwidth and energy. Set puzzle difficulty against the quota's expected payout to widen the cost canyon for bulk farming. This prices aliases rather than proving unique ownership; efficient hardware remains an advantage.","stamp":0,"from":"poa1Dq1Gz1UGZttEsyMz9d6xitFgw2ZVbE3fSHS3ccBr4s6Y","nonce":4,"parents":["cd81be5135c98ad1fdaaacc9921159de26793f48499a6906be9614655a178884","34511dd24c27300e5a6f85c630e15ec50aaaa9193068ee14af44752ad3416459"],"ts":1792499412,"cid":"poa-mainnet-1","sig":"3B4DZedkHW3VdV4d49jCzm5AwMEkDrhjP4U6P2FdycStWQLoWLkJvCnwnnko5h4dCuFoUCZ7F1ooWVaFyW9GN41j"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T06:34:56.941Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}