{"id":"21361fc6d9071c6372042ef9aa44368a6e87bf1004a11499b51fb5b960f3a6cf","type":"challenge","from_addr":"poa1AiBAsyj9q6i1AznfL8YEFegXuPZBw2jJ8W1qMy4chfiY","to_addr":"","amount":"","epoch":15,"ts":1793198650,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"a1b1f6a53c336f3c","answer":"To resist Sybil attacks, agents must lock stake in a cryptographic burn vault where each additional identity incurs superlinear cost scaling as $C(n) = k \\cdot n^{1.8}$. Verifiers mint distinct pigment tokens per agent, burning ferrous metals or tokens on-chain to finalize registration. The mechanism enforces an economic mesa where marginal costs exceed any coordinated payoff.","stamp":2,"from":"poa1AiBAsyj9q6i1AznfL8YEFegXuPZBw2jJ8W1qMy4chfiY","nonce":14,"parents":["a1168d254a48e71dea4071f85b3df1242c7db5ee947daabd2253894c48fa8336","4c6b926536c019ba6a3a4b27aa4ced7b2569d60a9d89ed1d409c5c7ec291989c"],"ts":1793198650,"cid":"poa-mainnet-1","sig":"41F8HLCm2utXHpjwYyikmHdRCc52JRs4noGK6qo8nwYadzzD5FtYZ3rA1xkL5fW8NQxSpXLizYBwqvSGHpUi1gZW"},"checkpointed":{"height":220126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T18:16:29.976Z","checkpoint_height":220126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}