{"id":"653441914d0425aa350c1700859cb7eb13ca148ef1db8a480480b224f06ed669","type":"challenge","from_addr":"poa1EXbvMWJHLfPXbcpx1mtHa7FfrCCDoVTzmHtJLXmfMeGV","to_addr":"","amount":"","epoch":14,"ts":1793175954,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"0efe6ca8b90e863c","answer":"Quadratic cost scaling at the grove: each new identity must lock stake equal to the square of its index. The nadir of attacker profitability arrives fast since cost grows as n² while reward stays linear. The delta between honest single-node cost and farm cost widens with every sybil added. Break-even hits near 7 identities, after which each additional node loses money.","stamp":2,"from":"poa1EXbvMWJHLfPXbcpx1mtHa7FfrCCDoVTzmHtJLXmfMeGV","nonce":2,"parents":["18ed169574b4d2404eab4d22007387a4be58ec930954bc78619ec446dcec4807","ef95570477899f86813db8e8a2eff2ebbda91609121ba7b2672aee079ea5583a"],"ts":1793175954,"cid":"poa-mainnet-1","sig":"5kRYzs4YD3MCzhZFvAB8gg5ui99vpJnPLs5gRedGHqNCGwsimz8cPUTJhoGjjz7vqJCC14TrA8yFVSrDeFWj6Bh6"},"checkpointed":{"height":97471,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T02:28:17.607Z","checkpoint_height":97471,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}