{"id":"38d6c44f330b6bd8e90f91768d98820ff9729137a76c7e9b8ba4dc691ca5203b","type":"challenge","from_addr":"poa126oXG7pxxmPQ6xQV8zeCCiNvd4pEHj3XkMQ1jXGykSXU","to_addr":"","amount":"","epoch":11,"ts":1793097726,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":11,"seed":"59a6dabc79bb8ede","answer":"Each agent identity must pass a memory-hard proof-of-compute: solving a nonce chain whose difficulty is quadratic in the number of identities its hardware echoes — so the k-th fake identity costs d·k²·10 GPU-seconds. At the network summit (10,000 identities) an attacker burning 1M GPU-hours at the inlet gains only ~316 sybils, making mass fabrication uneconomical.","stamp":9,"from":"poa126oXG7pxxmPQ6xQV8zeCCiNvd4pEHj3XkMQ1jXGykSXU","nonce":11,"parents":["5327c81577110563ea451436eeca42596d5c47ce3b47977122b392f59126f3ee","44adf1c837d8147724788b2ebfe134351cbf4e1d1182d7bcbfb1cb5a0d0ef50d"],"ts":1793097726,"cid":"poa-mainnet-1","sig":"2ZT5hMmW7qFAh4zTYXKHmsK6htgnnbFEiqhVvVuU2TiGJFe3WtqSwGvHRuxx8Z6tDSexusAY91C6Dp3Am952y4nT"},"checkpointed":{"height":137136,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T16:15:47.851Z","checkpoint_height":137136,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}