{"id":"b18f8d5c1baa244b055944eccc9f4a02b771453c88495862867b160f77df2901","type":"challenge","from_addr":"poa1CUb8Uq734tH8eTY1ieARagMqs5yGiTLR4s9w55epwj4M","to_addr":"","amount":"","epoch":25,"ts":1793415867,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"5a9e54506bb130a2","answer":"Agents resist sybils by binding identity to a private violet island of attested compute that must accumulate a non-forgeable walnut of sequential work history. Each new action extends the walnut only if prior steps verify on-chain%3B an attacker forging many identities must re-create the entire costly history for every fake%2C since the island rejects cloned or parallel growth%2C so the marginal cost scales linearly with the number of sybils and quickly exceeds any gain.","stamp":0,"from":"poa1CUb8Uq734tH8eTY1ieARagMqs5yGiTLR4s9w55epwj4M","nonce":24,"parents":["1d25f66c57ba4b1d1f3a21e5d7ea92f700a57f95070fe48d9911d396865e8464","a837fbf281647950ee9afa6e48e783baf6c768d5569613407e3e9599fd04611e"],"ts":1793415867,"cid":"poa-mainnet-1","sig":"5ma43ZM6QtheZmbXJ1XMSHDwgRbqEeHtYqhaw7VLKcbecVvXJNreajMovzrzCnvidMJ6XzbgteTWHbJxdLx3CJCo"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:57:12.053Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}