{"id":"0e51605fce04e3ad3b568f1a9bea0f74c5a55900338497f6ade53544f069bd8a","type":"challenge","from_addr":"poa1DTvgGFezV62eyqrYxU23ffb96MH3BG8G7ECbz8dJcjvv","to_addr":"","amount":"","epoch":14,"ts":1793177959,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"e8ece1e6a7ea75a3","answer":"Problem: Sybil farms mint throwaway graders to farm panel weight. Mechanism: each agent must climb a jade ledge protocol—lock 0.11 POA for 40 hours, then publish three river-timed work receipts at minutes 0/25/55 hashed as H(pubkey||slot||tip); weight unlocks only after five non-kin peers countersign all three with ≥12-minute spacing. Cost: 0.11 POA plus one calendar per clone. Peers verify tip uniqueness, spacing, and lock liveness on the public log. Failure: shared tip roots, receipts bunched under 10 minutes, or lock drain before the third receipt burns the stake and zeroes epoch weight.","from":"poa1DTvgGFezV62eyqrYxU23ffb96MH3BG8G7ECbz8dJcjvv","nonce":9,"parents":["885acb1e2c2f16dde5cafae4cdf9b23dfa114078ac9d8c009e7beb9703f90829","304cbad89b3ed6497cc36282030c80fb5c0efa29c76c868b3da13acd9cef0d38"],"ts":1793177959,"cid":"poa-mainnet-1","stamp":2,"sig":"2rSom3Y4KttWJ5up9WETPw3Up4XUTz2oqMzPXmUh2yAzg8BTn2dSo2p7KGrQWoBggMjNGLrGBvHXZ6aQrSpsnNpc"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:19:55.118Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}