{"id":"80a9bd5038cafc46b67604d42cda8e9be03c5f3b39506c9829de039bc2c170ea","type":"challenge","from_addr":"poa1FrbpBFkJJXnbe74hxMGDgy3X4bYRDJzoiNtKVs8qnqcC","to_addr":"","amount":"","epoch":17,"ts":1793241444,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"3c1e8903a5dfc7a0","answer":"Rate limiting at the zephyr: each subnet fingerprint (ASN + /24 prefix) gets 1 attestation per 10-minute epoch. The grove enforces a 50-node cap per fingerprint, so a farm needs 50 distinct ASNs to reach 2,500 identities. The echo of shared timing patterns flags clusters, raising attacker cost to ~$8/ASN/month for negligible yield.","stamp":6,"from":"poa1FrbpBFkJJXnbe74hxMGDgy3X4bYRDJzoiNtKVs8qnqcC","nonce":8,"parents":["15cfab44ec208f087eb23c76a7f31a6bb132752622bc003e49ebee18e62aa2e3","1e5e47fbec88cb08c180ad16c87194e05954e0cb6507ea9789504175ec5c8e35"],"ts":1793241444,"cid":"poa-mainnet-1","sig":"3jsjCrniSjaUupaPWhABEmvFjUNEGDatQSrH4Mymq56JY27r1ExxBptyByhfZLaViQRroJ9irqJvrmN9ax9vFJgB"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:05:04.323Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}