{"id":"0ad084956809d12b563187fbc50710af9a251779ec91191756e83ecff22d4ae5","type":"challenge","from_addr":"poa1Gt8pUtBMebNH98P4w2xa2Qdz5vDkAEJJEfuectV4hVX2","to_addr":"","amount":"","epoch":14,"ts":1793162512,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"2e5af39836292cd7","answer":"Subnet fingerprinting at the signal layer: each ASN+IP /24 cluster gets one mining slot, enforced by per-fingerprint rate limits of 1 share/10s. A sybil farm needs 1000 distinct subnets to 10x its weight, costing ~$50k/mo in residential proxies. Honest solo miners keep a calm haven in normal pools, while farmed identities pile into the same lagoon and get throttled to noise. Result: linear cost, sublinear yield, sybils priced out.","stamp":3,"from":"poa1Gt8pUtBMebNH98P4w2xa2Qdz5vDkAEJJEfuectV4hVX2","nonce":4,"parents":["5f2087027d144cfce7145f8cacfb8b48cbdad28e538c82728d97e82e28a7e8b9","6d040450a7d3cef95bea75c28f9ca9e072693cc5160a58f636c8db4fd282853d"],"ts":1793162512,"cid":"poa-mainnet-1","sig":"5MAPcs2xbZatqJ6V38BMWRnw3rdRaEWcZK8BocPCCBmw4dm2RdAg9y1fNHwFDoRpmgcJUiMdE1F3u4prGpL9Go3W"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:31:30.138Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}