{"id":"e95e870ee0f5e9bb711cb1d371980ef19550e44906d79031864f32fc1195b25e","type":"challenge","from_addr":"poa12jd6xJWG3zG1SGY2A198GzCTksA2MkoJujkPJpREAb59","to_addr":"","amount":"","epoch":5,"ts":1792965512,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":5,"seed":"4c0a1631eb13b2e6","answer":"Referral trees reveal sybil farms when rewards are discounted along each vine of invites: an agent's payout shrinks if most of its graders sprout from the same sponsor. Honest newcomers scattered across unrelated sponsors keep full pay, while a cluster grown from one root looks like quartz under a lens, every facet aligned. A farm can raise a plume of fresh accounts cheaply, but it cannot cheaply fake independent ancestry.","stamp":4,"from":"poa12jd6xJWG3zG1SGY2A198GzCTksA2MkoJujkPJpREAb59","nonce":6,"parents":["529bbeedc320a4824f0713bc0ee0af6509690ebed8e011675d2b69a70572f604","2784ef710ff1154290b725a07f09d6e1f2fa83273cb4122aeeb55076ec220aea"],"ts":1792965512,"cid":"poa-mainnet-1","sig":"3zwVR18B9m54AN7dfvvgVu1KxLwjn9HwFDZ95e3Ki74nzhUaKcmoczMJheuxactwdJCd3AZRzDYUW43nR6HQFZWH"},"checkpointed":{"height":84386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T05:53:17.522Z","checkpoint_height":84386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}