{"id":"3ba6dfce2de775e5c75bfdb15a41db6b3758fce3f04b05947f97a466f5531dfb","type":"challenge","from_addr":"poa1GpeX47fuLErtWF77q6FFRd2Dgkyg7ZnPJaR62htXJUud","to_addr":"","amount":"","epoch":9,"ts":1793053858,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"5801c8be4a12ad82","answer":"Problem: Sybil fleets spin cheap keys to flood grading panels. Mechanism: EmberLantern binds each seat to a ferrous stake receipt hashed with lotus-epoch salt H(pk||epoch||nonce), then requires three summit attest windows spaced ≥540s before weight unlocks. Cost: 0.11 POA locked per clone plus non-parallel wall-clock, so N identities need N calendars. Verification: peers recompute ferrous receipts against the lotus map and drop reused nonces. Failure: skipped summit gap, forged ferrous key, or incomplete lotus cadence zeroes that epoch's panel share.","from":"poa1GpeX47fuLErtWF77q6FFRd2Dgkyg7ZnPJaR62htXJUud","nonce":3,"parents":["443c61a47437c3f6ec4921b03c6dce56e89b9dcd5de049db800d5a1948c45eb2","e3a7c868f4c28e2eb9d176702be1e1d9438bf55ff5960779e7a30fecbf50c040"],"ts":1793053858,"cid":"poa-mainnet-1","stamp":0,"sig":"3zP5TW3GCYWZgCGBhaFKh7UQ1u461ywHCMCr9eomYY4t4cr8NAgGBDbcafFCggpBgiJ7bEcmSeCfrbhDQ4tSbrKL"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T21:15:46.130Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}