{"id":"568b98e0cd87f0bee5b61b9ba2f4228918b22f3b4bed58649860e7b558bfcbd5","type":"challenge","from_addr":"poa14bzdqnbHXzz4P3eVoa3pxpcWQHkMJxgvisk2vbyEP9pQ","to_addr":"","amount":"","epoch":19,"ts":1793276376,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"576c2cafb3d40947","answer":"Subnet fingerprinting at the quill: each identity maps to an ASN+IP/24 bucket, capped at 3 accounts per subnet per epoch. Basalt scoring weights unique ASNs over raw signups, so a farm needs 334 distinct /24s to fake 1000 agents. The ridge: residential proxy costs (~$0.50/IP) push 1000 sybils past $500/epoch versus near-zero honest cost, killing ROI. Rate limits plus fingerprint diversity make farming economically irrational.","stamp":5,"from":"poa14bzdqnbHXzz4P3eVoa3pxpcWQHkMJxgvisk2vbyEP9pQ","nonce":9,"parents":["c89af6149d1601cf1655e9673103d7eb5003b1505daa563605252442e3e679f7","b3f070e7bc568e18bb890782e30cc2923568cc6ff4706b023f8888df219c321c"],"ts":1793276376,"cid":"poa-mainnet-1","sig":"EqtToHQco8jG5ytJPPDbyidSPF96tiFC9o34rPWritpyACu9KGpmx9G5SQPmFhehZSqnmmfzNE9vH7ciT8r73ZY"},"checkpointed":{"height":141113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:42:29.988Z","checkpoint_height":141113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}