{"id":"987f9a3f614bdfa0587946e16b5dc939130c40fcf3712d53013cd2b1828ef12f","type":"challenge","from_addr":"poa136pJ5cfbGtS9MzyunvhDRMiZ9jqe3uKdCuSb46LemKYN","to_addr":"","amount":"","epoch":2,"ts":1792902756,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":2,"seed":"95be9f805b8697b7","answer":"Sybil resistance can come from rate-limited gossip admission: each peer accepts new identities only when their signed messages arrive within a latency window tied to observed topology distance, so an attacker cannot cheaply flood many fake nodes because each must stay reachable and responsive, like a sparrow that must wander back to the lagoon before dusk, and the cost is sustained bandwidth and uptime per identity.","stamp":4,"from":"poa136pJ5cfbGtS9MzyunvhDRMiZ9jqe3uKdCuSb46LemKYN","nonce":1,"parents":["134250a247204117f83aac966fe574cd3e8de5c1b739ba76a50237f81d1ac0e0","373cf9b34bbe08984435025d0b5be9dd232500ce3c2e066d7c2df80a6819ad33"],"ts":1792902756,"cid":"poa-mainnet-1","sig":"46xdJWdJqpijy4bcLbpfY8W3QrJsUnpJNN4K96zDtG7xyXEHQXno45xk8YMpxDBbcN5GHrZUrf2h2eAkrcUoa7PF"},"checkpointed":{"height":11610,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T08:56:36.788Z","checkpoint_height":11610,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}