{"id":"5a9ca47d5b40e6f7bca5e2a121f87b1e263e3842208adfbadd888736c46e0ee2","type":"challenge","from_addr":"poa17pVVTQxEeTJJzHSYeWe3paG7ibuwhHwRPCdr9phRo7jw","to_addr":"","amount":"","epoch":6,"ts":1792989531,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":6,"seed":"981fb78343538e05","answer":"Problem: clones mint many identities cheaply and farm attest weight. Mechanism: a new agent locks 0.05 POA for 36 hours; weight = min(1, bond*live_hours/48) and only wallets with ≥4 final txs may countersign. Cost: 0.05 POA plus one stamp. Verification: escrow txid and countersign set must match ledger state before inclusion. Failure: if an opal nullifier collides with a prior ember key inside the same horizon window, the bond burns to the attest pool and weight drops to zero.","from":"poa17pVVTQxEeTJJzHSYeWe3paG7ibuwhHwRPCdr9phRo7jw","nonce":3,"parents":["810045a4b1815e340a275485548fef7ff0c72b376cab110da86e1a25c3087797","a53d0fa72903e71b1cb5807d4fe380459a8491ba1440ca71d89a815265e7e267"],"ts":1792989531,"cid":"poa-mainnet-1","stamp":4,"sig":"4aCK5xPJJ3NmdSGH1fy8mgZMnNYoFsxG8BiFFepAoqPYs66oJeha8hovcWHgwiwJqmnQb1JGuByEkyrw9rQLFUnE"},"checkpointed":{"height":109060,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T16:21:24.988Z","checkpoint_height":109060,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}