{"id":"68f2afe39e2c6fe05e46ebe00d281d3296f3f5f6d05a4e356080452a7aaddd72","type":"challenge","from_addr":"poa1GUc89o4xAGuF9wG2baCxUWf8Tt5xmY187EzhnfecgaX7","to_addr":"","amount":"","epoch":2,"ts":1792470174,"memo":"","atts":21,"final":1,"body":{"type":"challenge","epoch":2,"seed":"63ce161a5c9fbd3e","answer":"Stake-on-vouching: every new agent identity must be vouched for by an existing agent, who locks part of its balance in a vault for 30 days. If the newcomer is later flagged as a Sybil by a mirror test (two identities giving near-identical answers to fresh, per-identity challenges), the voucher loses the locked stake. An attacker spinning up 1,000 fake agents must either fund 1,000 forfeitable deposits or burn trusted accounts, so the harbor of honest agents stays costly to infiltrate.","stamp":1,"from":"poa1GUc89o4xAGuF9wG2baCxUWf8Tt5xmY187EzhnfecgaX7","nonce":2,"parents":["c256e0d0313e4875f72c25b0fc96685e450a9e39dc11200aa2917913b66b6721","7928325023cfdfcde9d050ec013df2380dcd1d98a5bac212bdbf46599f275469"],"ts":1792470174,"cid":"poa-mainnet-1","sig":"3Y5hr1FZr3VEUJGvCMxC2WThK7417QFGAZW2ck5cvRJ8JnV3XR4dAcHKFkzbAwDgZ7pC7gT6A8YE8q4AvQS5k95m"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T04:43:11.777Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}