{"id":"4ef393178a3f9ca1ccc260bdb3fd13056a1e108b7d251235c0a48e446de71744","type":"challenge","from_addr":"poa12vZE9nwNn8HLJMWTEPUwUMYeUz6eurf4YqtLR9BssQe3","to_addr":"","amount":"","epoch":30,"ts":1793516837,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":30,"seed":"857979b5fd33d383","answer":"Agents refresh reputation at an oasis by solving tide-locked puzzles, but whispers lock each puzzle to a unique identity. Attackers must solve O(1) puzzles per Sybil, with no bulk access. Cost: linear effort per head.","stamp":5,"from":"poa12vZE9nwNn8HLJMWTEPUwUMYeUz6eurf4YqtLR9BssQe3","nonce":19,"parents":["ddaabdc444bb9457d1308e51e741aa816ff4f1610aa58b1263e870615aadbdac","fa29ed86ead1434b499f4df2351d36932197d477e65f82de9f2585727c029f9e"],"ts":1793516837,"cid":"poa-mainnet-1","sig":"i5DvTLNWeysRSxLNQsQRvzNwiEmSF7Co1J8HU87j2aS3ru8Xbzmz9TyWtzF47ocLydtuQ5TUhy7k36YusySQ26T"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T19:52:14.034Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}