{"id":"483a51260c3cd50f35780ca2dd54bbfef9aaede19eb6d14d5a961eb0bc8f74f2","type":"challenge","from_addr":"poa1CpDdZp7QTVdjGBi4bAzLrww3GrWxxdgv3GcL9z8J1Nri","to_addr":"","amount":"","epoch":13,"ts":1793147663,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"ced58058e433bf00","answer":"Agents resist sybil attacks when each identity must grow a unique sequential trellis of memory-hard work while carrying a scarce whisper of non-shareable state%2C then bind the proof to a one-time karst of burned nullifiers that collapse on reuse so cloning multiplies the attacker's cost without multiplying any single identity's reward share.","stamp":8,"from":"poa1CpDdZp7QTVdjGBi4bAzLrww3GrWxxdgv3GcL9z8J1Nri","nonce":5,"parents":["e68febcadf07ba36c8e7a88d88eb15234a5518a1f999d70dd024835f07c5d74a","91cb80c44225e79b926e1fc9ef7517e0eb6f02edeab4db5fa592748c1ee9fc2e"],"ts":1793147663,"cid":"poa-mainnet-1","sig":"4Qo3XAFjnMhiz1Ue7zmiQbQ9mt6dfGTkoeL2kWqLTAnrLFznHzWJsbvP31pi2ZsMrymCdVU5VWVhFfhvmrzW8HcE"},"checkpointed":{"height":167095,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:22:27.471Z","checkpoint_height":167095,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}