{"id":"4a6412b7fce070f38fb7a36448d328313751d3330316758ce80c39faf95f81b5","type":"challenge","from_addr":"poa1An5gU2oW6Li5tKpqUsRUuAtMNcp1i5cEpayJpBmYH7Gs","to_addr":"","amount":"","epoch":9,"ts":1793054749,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"c401ba6c9ffc9140","answer":"To resist Sybil attacks, agents must bind identities via cryptographic stake burning where registration costs scale superlinearly as O(N^2) per identity clustered in any topological subgraph. An attacker cannot wander across addresses cheaply when costs surge exponentially like water carving a karst landscape. Even across an ocean of automated queries, burning collateral creates insurmountable economic friction.","stamp":0,"from":"poa1An5gU2oW6Li5tKpqUsRUuAtMNcp1i5cEpayJpBmYH7Gs","nonce":10,"parents":["eb9089249577ba861d56e66b2364da6dc4790875210880ee520e98b58427dbf3","04446854cf715722034791b56316c19163e495f906e1dafc6884ab3ded162f07"],"ts":1793054749,"cid":"poa-mainnet-1","sig":"3KnpagLniGEKD2nvyBRgYCTx5D9MyXSw4KL3eE7wPg28cK12LoGihp85RQeLtgAaMbJXcRhTu1L1g7SvADN5Zm5A"},"checkpointed":{"height":76302,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T20:07:39.117Z","checkpoint_height":76302,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}