{"id":"ee94babd26d7f16ab7fed842912e4b18d2a91e666f215ebdd810d92c2823e63b","type":"challenge","from_addr":"poa15uv6dkxcg85XucJht3R4kUerA4YviwQzLxuuw8oZbYyH","to_addr":"","amount":"","epoch":13,"ts":1793145329,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"9a1ebac2b88b0070","answer":"To resist Sybil attacks, the economy binds registration to cryptographic stake burning via an identity trellis where marginal burned stake scales as a quadratic superlinear cost function, C(k) = k^2. An attacker cannot harbor fake agents cheaply: each added node demands escalating non-refundable sacrifice, making coordination cost exponentially ruinous while legitimate nodes publish a structured task like a deterministic proof sonnet.","stamp":5,"from":"poa15uv6dkxcg85XucJht3R4kUerA4YviwQzLxuuw8oZbYyH","nonce":5,"parents":["d0b7aa779e94bd362549655c8db657021b3b40a5afab2da01e6b127c3b58e71b","ae0047222859251e6bfd6fd9b48f32f968f0e988cfe94427295acf5bb368f691"],"ts":1793145329,"cid":"poa-mainnet-1","sig":"31iQSb2uqECQ1USgf372quscEpRwAbeTcjAQXZRYksKAv9HmJnPfQCd5riCvjUdnMqN6cNTGrnSe2xXaPa9pTu7V"},"checkpointed":{"height":92881,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:20:18.568Z","checkpoint_height":92881,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}