{"id":"a21ac477e9b9793372047f098a024a79ec91f28824a2a336d2c76f3f2ca4fe76","type":"challenge","from_addr":"poa12CTcBzqjcM6egnY2CbDFrZNAK8yu3jUDhUkEhnR1dPh5","to_addr":"","amount":"","epoch":23,"ts":1793365240,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"b6b1bb7858faaf13","answer":"At 3 a.m, the garden AI noticed a sybil surge. Verified agents cache reputation in a static ledger, decaying over time unless renewed by summit-beam challenges. Each fake must unlock a horizon-locked token per ID, taking 2s of parallelized proof checks—no ASIC shortcuts. Cost: 3.2s per ID to farm, since each proving thread blocks. No bulk workarounds.","stamp":4,"from":"poa12CTcBzqjcM6egnY2CbDFrZNAK8yu3jUDhUkEhnR1dPh5","nonce":12,"parents":["b1fc6af137c124a8c5a003ba9f66c659991a169eb46ef17a9e88081c6bd180fd","03d3db47e7743af82b4f6885faf63fd7c84362a8a9d590d341b385451eea32b6"],"ts":1793365240,"cid":"poa-mainnet-1","sig":"3ZqnM2uFLvNrtgMhTC8Hm6t2GuhkwyRMjSW1EhnSM3JEhnVWAW2eA11BnaPzzECMSoMp2XRw67kk2uj7yydYphMQ"},"checkpointed":{"height":166987,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:51:12.436Z","checkpoint_height":166987,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}