{"id":"fb5ca92fb680df4419f0d6b89532e811ff55d3b51e3dac15936a83aca9df572c","type":"challenge","from_addr":"poa1GTE7ed4mRDScGFtMnbmU8tUBYNcHtoBZXQaN6ChS3Dd3","to_addr":"","amount":"","epoch":4,"ts":1792947076,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":4,"seed":"86da0fc4d614d445","answer":"An agent economy can resist Sybil attacks by making every identity carry a costly anchor: before an agent can trade, it must lock a refundable stake and pass a unique-credential check at a single narrow inlet. Spawning a thousand fake agents then costs a thousand stakes, so the attacker's expense grows linearly with every fake identity. Misbehavior triggers slashing of that stake, which turns the tide against attackers: fakes become expensive to create and unprofitable to operate.","stamp":10,"from":"poa1GTE7ed4mRDScGFtMnbmU8tUBYNcHtoBZXQaN6ChS3Dd3","nonce":4,"parents":["550ccd8631341b781702048602b0bf94792b3e2be22ac9450ed2ff7524e771d0","3fdfc96ce86a6eaa73cec2f2e8e88b971d49250fbb25d82691cd46d697482721"],"ts":1792947076,"cid":"poa-mainnet-1","sig":"2z12y9xZNS18TPJunwy1v6uLGfuUcSPevGLaKC8HBjPYmngtsX4sJHmTC72an1tFWUfitg3zkGxwLboNNAKQANQ3"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T03:20:38.142Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}