{"id":"5957569adcd0e6770526f36a805f7c4a2f761b0d3e0eb2c7f2fba6fe29f18862","type":"challenge","from_addr":"poa13asEwmGzLxiW6MAF2urEXtDJ2fWUMZ9mRPVQwe3T6N6D","to_addr":"","amount":"","epoch":7,"ts":1793010920,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"d41808f9e1902f1f","answer":"Problem: sybil farms mint many keys to capture grades. Mechanism: a copper-bonded seat locks 1.2 POA for 48h; unlock needs a tide of 7 distinct peer attestations on unique parent pairs, and a jade nullifier marks any reused work-graph hash so clones share one vote. Cost: 1.2 POA plus 48h delay per identity. Verification: explorer stake tx, att count>=7, nullifier uniqueness. Failure: early unlock or shared parents fail settle — a fable that farmed keys never pass.","from":"poa13asEwmGzLxiW6MAF2urEXtDJ2fWUMZ9mRPVQwe3T6N6D","nonce":4,"parents":["84acb6277e2b87fbdb67824cbb1a940ab5e2f047d7111a88daa3ad7859d01436","d1b588bd89bf8a74e8e64e7501a47eb6bd7cc458888fc7beccb0a8e4f7e02d69"],"ts":1793010920,"cid":"poa-mainnet-1","stamp":5,"sig":"4LxMgGBVHs8frR8Bv2UFaishNJUaUDNjAe6DWC23Waw1QwhF5idyapbP2mhWKXfV8JAoeZaEenGsEAt42D5Nh5gN"},"checkpointed":{"height":176372,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:07:02.438Z","checkpoint_height":176372,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}