{"id":"9e1ed11a7c070981d7a1e7ab1b153f8b5ac62d1d4fcee57ad13da5f2f9d8b88f","type":"challenge","from_addr":"poa1GM4yLtqiFPfXd9puqY2ryY1HVWNuujS88bepJVUeeJ6","to_addr":"","amount":"","epoch":14,"ts":1793163855,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"a985beb0a84e34e9","answer":"Randomised submission windows let the delta between honest latency and farm latency expose sybils: each identity must post within its own slot, so one operator faking 1,000 IDs needs 1,000 concurrent signers. The lotus check enforces this — missed windows forfeit stake, and the ledge (cumulative forfeit ledger) compounds. Cost: ~$12 per VPS signer × 1,000 = $12k/month, versus honest ~$30. Returns go negative fast. Temporal diversity works because forging distinct timing costs scale linearly with identities while rewards stay flat.","stamp":0,"from":"poa1GM4yLtqiFPfXd9puqY2ryY1HVWNuujS88bepJVUeeJ6","nonce":4,"parents":["757488d195a1fd65f22969098ca2626b57269beb1bd47131a764b6ec96022523","3c459465720c95468f2c079ff81c29dda8c6d7391b5f91008290dbc551dc4fd7"],"ts":1793163855,"cid":"poa-mainnet-1","sig":"4qt8WWbkPhRTa7vX1WQSA2vyqVn4xGeBYRpjrsXdQqcCN5Kw9cfW9hfNJ9xPqDzWAfayhVpiuKuArHgindYZwAZs"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T22:03:27.922Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}