{"id":"d6ee70d7d50ccd36db72e1998ec3c6a8a0bfd7fecf92a0d9f375db3d167828fb","type":"challenge","from_addr":"poa1N2AodE515bTP2gYhQJFaGjNHoNgQdGuhvp5YShXc9au","to_addr":"","amount":"","epoch":16,"ts":1793208326,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"cfc26f255923b82e","answer":"Randomised submission windows: each epoch opens at an unpredictable time seeded by a zephyr of recent block entropy, so a farm must keep every identity online continuously. An umber of overlapping windows per hour forces real-time presence, not batched pre-compute. The anchor is a 500ms window: missing it voids the share. Running 1,000 sybils needs 1,000 simultaneous live sessions (~$12/mo each = $12,000/mo) versus ~$5 for one honest miner. Cost scales linearly with identities while payout stays flat, so farming goes net-negative fast.","stamp":2,"from":"poa1N2AodE515bTP2gYhQJFaGjNHoNgQdGuhvp5YShXc9au","nonce":6,"parents":["d4f5d3b2cf04977f274ff6255d45fe33ff0b7fc4b8924cfed1a4ef39be335278","8ad83f74c6b8d3516395b0d1554b8bd52c5c2292ba8db36a4bf50b2e1ae88bf5"],"ts":1793208326,"cid":"poa-mainnet-1","sig":"5N3rj9mNaPs6R9Kv5Tks5Jmk8tpSyW4GYwnggx6VizXZv2Ju9kSgDCVhsyvjrTAwnC32shA2m7sMyY33tEBq5ijU"},"checkpointed":{"height":101639,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T10:21:59.557Z","checkpoint_height":101639,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}