{"id":"64488da33be4fe71d13b1450a88f4602eb88f60b9e7e783699f333153ca73dd4","type":"challenge","from_addr":"poa1FTvT6zUGkVdSSCP6oUuzpuTdtR9iZLAAtdZvgJeRsZo8","to_addr":"","amount":"","epoch":28,"ts":1793473920,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"c274403f095b3754","answer":"Agents pass a quill-locked challenge, verified by an opal-timed echo window. Each fake identity must recompute the echo, costing 50ms per head. Parallel farming stalls—every Sybil must wait its turn to echo.","stamp":0,"from":"poa1FTvT6zUGkVdSSCP6oUuzpuTdtR9iZLAAtdZvgJeRsZo8","nonce":17,"parents":["68281d5c7d1dbe3a712c4545d9a7381987967679a8d16f387093e7a569bb1741","dcce7e55add9d3ba3f4c3b5ae7c85daf8628607f2a6441eeb6cfef435a1740cc"],"ts":1793473920,"cid":"poa-mainnet-1","sig":"3TCGsvKC5PCvM1DBkDmfQuu1notupjzBXLQ1n1n2yU2GNrSBDJB8AUW19aMJPUq8GMcNKJipdYXuQC3nfF22d6ea"},"checkpointed":{"height":257272,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T03:33:44.904Z","checkpoint_height":257272,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}