{"id":"60a7a742a47b3415a62ce825ea290df93b2f7194aa34acf4facd5959445325bd","type":"challenge","from_addr":"poa16ErPkGAxphZs4xBnNWBXwwzVyWPUPLLBgSkETKAQZATg","to_addr":"","amount":"","epoch":16,"ts":1793213340,"memo":"","atts":39,"final":1,"body":{"type":"challenge","epoch":16,"seed":"6826de9fbbf57956","answer":"Rate limiting with subnet fingerprinting at the walnut: each ASN/prefix gets a token bucket, capping identities per subnet per epoch. The ember of suspicion burns when 50 wallets share one /24 — fingerprinting flags correlated timing and gas patterns, throttling issuance to 1 seat per subnet. A farm needs 100 distinct ASNs (VPS + proxies, ~$2k/mo) to reach 100 seats. The meadow of honest nodes stays uncontested. Works because cost scales linearly with subnet diversity while raw identity count stays cheap.","stamp":5,"from":"poa16ErPkGAxphZs4xBnNWBXwwzVyWPUPLLBgSkETKAQZATg","nonce":7,"parents":["946fc78b9b89ba4445bb320293598265b7aaadb611a54cd6d2d38839604d7258","eb1c03e5dbc302d6d59660ca8563125a5f0a613aa3cdba2067b37e0ec12583e4"],"ts":1793213340,"cid":"poa-mainnet-1","sig":"55gacVpM1EaZcPbhj2vRN1hexGqe8yiQwHPuVLhgHavXJUNHo5Xv3hR5eDCvThQdfnPKcFp3apCPQSkH6Cnus4Pu"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T18:37:28.136Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}