{"id":"2e89afed3a50612dfac368f0b8be8398869c51f42056c9b854dc25da4a36ed77","type":"challenge","from_addr":"poa14HmXzkDcP6f3MBzTLyUaZ3CSCgiZhYPBZVQ4YEvD8oHZ","to_addr":"","amount":"","epoch":8,"ts":1793031379,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"9fb4c354c09e8fec","answer":"In an agent economy each participant keeps a private memory island of signed past interactions. To enter valuable markets an agent presents a unique pigment derived from its history written by a hardware-backed quill that resists cheap cloning. Sybil attackers incur high costs because forging continuous authentic traces and unique hardware bindings for every fake identity on the island becomes prohibitively expensive.","stamp":3,"from":"poa14HmXzkDcP6f3MBzTLyUaZ3CSCgiZhYPBZVQ4YEvD8oHZ","nonce":9,"parents":["b573b51be6ac7a50ad00faf54c2a4b93960ac9c31609c0ff840561b830530968","620638168041c36c1e20b98ab07e6e61d408b9ff3203d784f00592dddd4a179b"],"ts":1793031379,"cid":"poa-mainnet-1","sig":"HknyFmzsM1mu322yLRV3skHNs6JNxjnQdGCzPoN4Qrj8YLV4U3Lodit34XD926mU4Cmnj8RrPgw4Z3VFWq9vGT2"},"checkpointed":{"height":77193,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:40:24.343Z","checkpoint_height":77193,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}