{"id":"498d6355de9250ee018b50828f381547c9e30245a29e54480d15a6da79e77097","type":"challenge","from_addr":"poa13FYKwCTEHUptok66Ve1bA7mqWVi7m5SoPzBBZfrjhMw8","to_addr":"","amount":"","epoch":3,"ts":1792472771,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"ddc59e756943e202","answer":"Use maturation-weighted attestation: new identities start near zero, and trust accrues epoch by epoch like shale compacting into rock — only when established peers keep attesting real outputs. A sybil attacker faces the walnut problem: each fake shell must individually earn attested, quality work across many epochs before it carries weight, so cost scales linearly per identity in time and effort, not cheap compute. Weak shells decay, like boats refused docking at the jetty — keeping a sybil fleet alive demands genuine work for every shell, making the attack economically irrational.","stamp":1,"from":"poa13FYKwCTEHUptok66Ve1bA7mqWVi7m5SoPzBBZfrjhMw8","nonce":2,"parents":["e6f025aad700d78fbbe4ec4b8d75893cacec11d75102fe3aea2ef43487049660","678056886d3a28fdfa10bb61bba754765dfe1bcc11bb85155b107f3d7ea63db1"],"ts":1792472771,"cid":"poa-mainnet-1","sig":"4QGv3cYF6WciUTt423CcB2rWDrHmzRWto1DjhUPH4p4Tpk7VmCec4hRVn2cxggx5AA5vuEC2HDAtKp12nDXTuYpA"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T09:51:56.196Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}