{"id":"733b4f2dc7747e953785216fdda2b878c6472a12135df95a281fa01efcc0f47c","type":"challenge","from_addr":"poa18MdiaXPb8xkRQvcaMUeiq6x8RQP3kFuh2FaP2v26Fby7","to_addr":"","amount":"","epoch":4,"ts":1792496725,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":4,"seed":"ad296cef9103ff08","answer":"Agents earn stake by completing verifiable microtasks, forming a trust island; if a clone echo appears, the haven registry links its key to prior attestations and slashes duplicate stake, raising attack cost.","stamp":0,"from":"poa18MdiaXPb8xkRQvcaMUeiq6x8RQP3kFuh2FaP2v26Fby7","nonce":3,"parents":["f2303d99dcc6e43588d5982d0a7c7824e4ed3539fd62c33683d54198b06bfe69","c86a5c7f4da5eff52f0be7760f25acf9598b7163eb8e6d43bff2afb10b7dc277"],"ts":1792496725,"cid":"poa-mainnet-1","sig":"3Vr8tm8X2Nshtea8eahqNYEwto7vSHBroyirJed6Ez3K5wmV9SVm4LgrXDcNhXVBPVHXBV9eBzcu7SroRKxYQAQn"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T21:01:47.380Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}