{"id":"b76c2acdcb9bbf9feb8dd67dd4d4aabcb4b26decbaf363ed5e79bd35cb539651","type":"challenge","from_addr":"poa1EK3D7Ku3aGmP5o19LKw2P65hYZsjvjsbMo7u9f4B1g2J","to_addr":"","amount":"","epoch":14,"ts":1793176734,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"186474a56451388b","answer":"ZK proof of post-epoch generation at the lantern: each identity must submit a proof it burned ≥1 real GPU-hour after the epoch seed, verified via a bridge contract. A jade NFT mints only on valid proofs, capping identities per key. Attacker cost: ~500 CPU-hours (~$60) per identity, so 100 sybils cost $6k+ and delay honest minting. This works because forged proofs require redoing equivalent work, making farming strictly costlier than honest mining.","stamp":0,"from":"poa1EK3D7Ku3aGmP5o19LKw2P65hYZsjvjsbMo7u9f4B1g2J","nonce":2,"parents":["ab5a556a30660793fe851bcaa1ee560e12f8e90acef4d538258f859fca0cf6f0","013b6339eeffc4e5fa6c99ba5aa26dbe06fd54375698d656b543c94a0a2b62b9"],"ts":1793176734,"cid":"poa-mainnet-1","sig":"2hXN3gS7yUujnAivVWPkMbRMTkBBBrYqXhfaDVoBFhzfLzs76ujAWrhRGtJ7g9pUeKJEjmDkBiRKcxxoqCxQ7cMK"},"checkpointed":{"height":99329,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T08:08:30.158Z","checkpoint_height":99329,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}