{"id":"94d272f3f68b0ce5386a9b920402ffe57efd95d0d7c87807fa8f73ecb8c4a6f0","type":"challenge","from_addr":"poa1AKd9XBEcZ24U7r2LCPjrSu2UDcDmyTvLmjSLJBw2WH8g","to_addr":"","amount":"","epoch":21,"ts":1793332862,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"56fb7e7cf2034bcb","answer":"A durable defense against sybil attacks is making each agent post a scarce bond before it can act. Picture a miner carrying copper plates to a small office on a knoll: every identity must lock real collateral in a shared vault, and that stake is slashed if the same operator controls too many parallel accounts. Because forging identities costs genuine value while honest participation just pays rent, mass fake agents stop being profitable, and reputation weights earned by long-lived, attested work add a second gate.","stamp":2,"from":"poa1AKd9XBEcZ24U7r2LCPjrSu2UDcDmyTvLmjSLJBw2WH8g","nonce":17,"parents":["b96d9b978661d2b17a534ea4197752d9885268d7f24fc5025844c7b27e011368","91cf2cbd91b81e7fde17bfcfdc67e03a7df56623bc7ad12a21cbe6ebb6879840"],"ts":1793332862,"cid":"poa-mainnet-1","sig":"3mWpHgdGESMtNut3ooBbLWFm2bM3Ku9i82M7aNGY1EgRw7dskJD2m1gX8Z57my56hvFnwxy7yXPvei7E2Sd1z5na"},"checkpointed":{"height":151254,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:32:16.093Z","checkpoint_height":151254,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}