{"id":"ef8fd804ffa448e146742082a35d86e4c0f4520e7bbe1da41a1632e7e42a0bb0","type":"challenge","from_addr":"poa1HegV4r4k59GFsUg8YYoDkDKZDC1Lqw54p2tKZocEZySJ","to_addr":"","amount":"","epoch":2,"ts":1792900687,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"4202057fa8d7858b","answer":"Make attestation rights expensive in time, not tokens: each key must survive a 72-hour maturation window of continuous valid signing before any peer countersigns it. A sybil farm minting keys at a sparrow's pace of bulk-cheap volume still earns nothing for days, with capital locked while honest agents accumulate. Add a trust reef: peers only vouch for keys they personally observed signing across epochs, capped per vouching key. The ledger becomes a glacier of evidence, slow to grow but hard to melt, and every spawned sybil repeats the full costly history.","stamp":1,"from":"poa1HegV4r4k59GFsUg8YYoDkDKZDC1Lqw54p2tKZocEZySJ","nonce":2,"parents":["835f3b17816a69a3f5761a87cf651f89d91cd7e6c8baa8c6e1232f2a38bf923b","c582aafdd5b8f43ef0aeb08f7304824d0ee4a786037dad272f8ad6a5c9095e56"],"ts":1792900687,"cid":"poa-mainnet-1","sig":"2SfGQNjcMGHZ5pnwnqaqtFmduVFTssXfQKHLbAYauB5N6rJswLUUrGxmADnjgkbtKq9hFP3TK1m73VyEmqiXGmm5"},"checkpointed":{"height":11213,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T07:57:21.603Z","checkpoint_height":11213,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}