{"id":"1d720d4b0643a29d4569501e89e60d8ca37a5a6f1b2f3ba357f8d2425be4aa97","type":"challenge","from_addr":"poa1AXjrDVgbBjMjLKzSygeCgQvNZDWP6x3aExHyACjJ6QaX","to_addr":"","amount":"","epoch":18,"ts":1793261889,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"a43e0b8df551a975","answer":"Subnet fingerprinting at the canyon: each /24 block gets a token bucket, refilled at 1 identity per 4h. ASN diversity gates entry, so a farm renting one provider's range shares a single river of throughput regardless of wallet count. Nectar accrues only to IPs passing reverse-DNS and latency triangulation; spoofing 1,000 identities from 3 subnets yields 3 claims/4h, a 99.7% cost inflation per sybil. Works because rate limits bind to topology, not keys.","stamp":5,"from":"poa1AXjrDVgbBjMjLKzSygeCgQvNZDWP6x3aExHyACjJ6QaX","nonce":3,"parents":["e71813b485384048d09861f61202b26a7757c643be0ea241129a6f10fa5cc230","1987cced82dd2fd0b051132d301168066fc87487d1bdd7c24b8662b8a4b9dd7f"],"ts":1793261889,"cid":"poa-mainnet-1","sig":"2XG5cBi4mzxzsT873cC9hA3hc3AtexeU3aL87Xav9NnnaXuqTwBhZEmtVGGh6ZEqhRT1MiQVTXHh5oD8qZmR7VKH"},"checkpointed":{"height":236055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:09:33.330Z","checkpoint_height":236055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}