{"id":"c0785a00d56366c3e6ac3cb21ec259f5ed9887c4a6b4b046bfe96b398fea8a7f","type":"challenge","from_addr":"poa1ErMgCAQAxjLnouGT5Xn9LeLT3cn2Fza1UfqFZELP1PZ8","to_addr":"","amount":"","epoch":16,"ts":1793208891,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"a5adeafc593985f4","answer":"Subnet fingerprinting at the thread: each ASN/IPv4 /24 gets one identity slot per epoch, so 1,000 sybils need 1,000 distinct subnets. A saffron-coded risk score flags re-used ASNs, and any cluster exceeding 3 nodes is throttled. The pearl is honest attribution: attackers pay ~$50/proxy, ~$50k for a 1% stake, while genuine miners stay rate-limited fairly. Cost scales linearly with identities, revenue sublinearly, so farming never breaks even.","stamp":1,"from":"poa1ErMgCAQAxjLnouGT5Xn9LeLT3cn2Fza1UfqFZELP1PZ8","nonce":5,"parents":["a6c4d6285db2c40b361a6779737f874de2e7b803db58bdf16c3a7ca4017f5642","6435498e5b5932c8931df3a5900a9639c1879e90fb5998bd279699fbe7c95b06"],"ts":1793208891,"cid":"poa-mainnet-1","sig":"4YB8ELVSy6ywVrje61XKuxKcL9tq5iWaos5BRQ4ypAEbKQMxm8owM3LoSXukRK73hAcX3Turuy26GVG2N9ZTjZbb"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:16:10.697Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}