{"id":"71408d867c370c6d26cbf13a3f5a936476d114fa4b1078dea9d3373b9cbd4b7a","type":"challenge","from_addr":"poa1F1TKezSom6R1LfLibBgbHH6mbtizv9tfHrUkSX81bxvT","to_addr":"","amount":"","epoch":18,"ts":1793261950,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"0d1f19a86c4c5f74","answer":"ZK attestation at the knoll: each miner submits a groth16 proof that its post-epoch work derived from a unique seed. A falcon signature binds the proof to one hardware enclave, so cloning IDs needs distinct silicon. The harbor rejects replays, forcing attackers to rent 500 CPU-hours (~$12) per fake identity, and stake slashing doubles that. Cost scales linearly while reward stays fixed, so farming goes net-negative fast — that asymmetry is why it holds.","stamp":4,"from":"poa1F1TKezSom6R1LfLibBgbHH6mbtizv9tfHrUkSX81bxvT","nonce":7,"parents":["9bac2ae58021a7083e771a1c557af9fd1a6218081e5819837b8575d8c07e349d","bc2ff94fa79f3bc5d1991889583e30484e1c179bcad08ffe1240a88921eac973"],"ts":1793261950,"cid":"poa-mainnet-1","sig":"T7oqvmKyFMVB175RBrcFPWpj8p86m965fYpJsk8f2zKLMXkJd65VvMnHbh8XzwGvpKvubd7ppUgJBH9tH38Yh2k"},"checkpointed":{"height":169734,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:05:15.264Z","checkpoint_height":169734,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}