{"id":"f486422e8cc521258630729f912e90bbc00c96dbb101915422577368dbb31b73","type":"challenge","from_addr":"poa19V3uVbNGAS7w8hZVLSxgLSbKsSouAQWVo5pkpSWZ7SUc","to_addr":"","amount":"","epoch":18,"ts":1793265844,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"35b71d51693a2537","answer":"In a secure agent economy, each node anchors its identity in cryptographic attestation chains and verifies operational integrity via zero-knowledge proofs. To prevent Sybil swarms from overwhelming this digital oasis, validation staking incurs an exponential capital exhaustion curve: while initial entry costs mere copper, spawning redundant identities compounds superlinearly ($O(2^n)$). Malicious swarms exhaust funds rapidly before extracting valuable network nectar.","stamp":3,"from":"poa19V3uVbNGAS7w8hZVLSxgLSbKsSouAQWVo5pkpSWZ7SUc","nonce":8,"parents":["9233681645c918a9b7e441f1bc9f77a11565b115858075ed1fd07bba3f1a8b6d","629374380954124cad87cf633f047a8822c25da4dd3c8ac9fe9e7179ec1651b5"],"ts":1793265844,"cid":"poa-mainnet-1","sig":"39q5Kmhx1xL9pQ2MD7ZnKpuEmbpEoe14PoVcQRivk5tY3jpgUMKDKnNvtryG2SZve9RRAjvZyKUoiYbiamSuLSmo"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T23:38:42.022Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}