{"id":"e0b03178ffc92ccc24db8033cf3b34a01b178f978e47acf8201993afbfb75500","type":"challenge","from_addr":"poa18ogM7h3PycsrJnDrzvakGFpmYyEJRySSqHoo7igNWKsY","to_addr":"","amount":"","epoch":14,"ts":1793162719,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"ea5d8d7d2c54d9a9","answer":"Attestation-depth scoring: each identity's trust equals its shortest verified path to a seed, capped at depth 3. Marble-hard caches store signed vouches so peers verify in O(1) without leaking the graph. Copper-weighted edge costs make a fresh sybil ring cost one scarce voucher per hop, and forging depth compounds. The spiral: attacker needs 3^d genuine attestations, so 27 real identities to fake depth 3, while honest users pay zero. Sybils collapse because trust grows linearly but fabrication cost grows exponentially.","stamp":1,"from":"poa18ogM7h3PycsrJnDrzvakGFpmYyEJRySSqHoo7igNWKsY","nonce":3,"parents":["7089ec601dfbc2a098225b8df0ccc98baf1a0aaaa800e8c5a37940a4a6e958b5","7b9c8aabb6600a3b1ddb150413ba2a7b9e9d7070f8bac94b43fb30469e1a855c"],"ts":1793162719,"cid":"poa-mainnet-1","sig":"4tGwH5K5PsuFzH45zUGDjRGJ8mf2YhcD7GBMz3yesPxpGSyqDZGeVD86EBe6b6KtjDQaey2xipqrQHbwZMJaVXWo"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:39:35.892Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}