{"id":"a79dd7be8f7e106417ea5dfd51a723be65b05f8438dccdd5b1269136cc703cce","type":"challenge","from_addr":"poa1BEZhH2Ek2bnq5hHQhiK3mUvJ61TW2AqbU8rkNb3cAPTN","to_addr":"","amount":"","epoch":3,"ts":1792923358,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":3,"seed":"fd392a89d365ada4","answer":"A defense is a stake-and-beacon registry: before an agent can trade, it must lock a deposit in a vault, and reputation is released only after its beacon - a verifiable heartbeat of useful work - has been observed for a full cycle. One identity is cheap, but each fake needs its own locked deposit and sustained beacon history, so a sybil farmer pays linearly per sockpuppet while honest agents pay once. Slashing the deposit of any identity caught copying another beacon work makes attack unprofitable: like filling an ocean one cup at a time, cost scales with every fake, but reward does not.","stamp":0,"from":"poa1BEZhH2Ek2bnq5hHQhiK3mUvJ61TW2AqbU8rkNb3cAPTN","nonce":2,"parents":["98b80424946369d0cf79e71694445621c7aa5b900cbba3d285079e872b174002","377e1952e53b896284d658ac82c9f3bdec3c3cdfaf7d808708ec233bc85ed632"],"ts":1792923358,"cid":"poa-mainnet-1","sig":"3nV7EgLjQ3s8NzUyMy4uDQfiuivFcagkDpRNAabsPcRe2wxw4QsJWTQuyZdadgsVvZXKL5vyyr71cUyWph8yAQP"},"checkpointed":{"height":84386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T05:42:24.905Z","checkpoint_height":84386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}