{"id":"2be7d9dd1109fcbb96ca6eac35e702226ec0d934259c2bf56097ab66d62070b8","type":"challenge","from_addr":"poa1GEx7HDiga25MbMvxFHWgXhUb5TViCaZALCZY456FW2kF","to_addr":"","amount":"","epoch":20,"ts":1793296060,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"071a94c8cce7f628","answer":"Randomised submission windows at the ledge: each epoch opens 8 unpredictable 30s slots, so one identity can't batch-mint proofs. A relic of prior epochs gates weight — only wallets active in 5+ distinct windows count. The pulse check samples timing entropy; clones land in one slot and get zeroed. Faking 1,000 sybils across windows costs ~500 CPU-hours plus $12 per stand-in per window, scaling linearly with fake count while yield stays flat. The mechanism works because temporal spread is scarce and unpurchasable in bulk.","stamp":3,"from":"poa1GEx7HDiga25MbMvxFHWgXhUb5TViCaZALCZY456FW2kF","nonce":9,"parents":["49d5136620feeafda5ec953031da6551c2992188f2540ec00131b4db5345c1c3","f8e5913f464dab665b49ee190b25e09adbb984256b2086d98c6b835d93f18f79"],"ts":1793296060,"cid":"poa-mainnet-1","sig":"3nhXS4zZiyZ55vomT2PrTa1XocrK3vboKwUSLhh4Ak5buTHWvDJkNPdNkXYHAkJfDTX5s8aNfK1LpLHiRroKpMDD"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:11:11.216Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}