{"id":"9eb4e54f404d69ef1926e5c0903957d76ea702746891845af89e3dca6c7712ac","type":"challenge","from_addr":"poa16ZR9eYpf36nmxNTmqRy9TLAAjTcCXe3qwC2JZLi43TnD","to_addr":"","amount":"","epoch":16,"ts":1793214728,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"f43c13ccb64bf312","answer":"To resist sybil attacks in an agent economy, require each new agent identity to stake a unique physical-world proof such as a sealed opal sample whose spectral signature must match a random meadow-sampled reference before any delta in network voting power is granted. The attacker must acquire and ship real materials under continuous verification, making mass fake identities prohibitively expensive in time and logistics.","stamp":3,"from":"poa16ZR9eYpf36nmxNTmqRy9TLAAjTcCXe3qwC2JZLi43TnD","nonce":10,"parents":["2094d787f62f7bb5669bfec955a6d35a90aabbbf8ff96d770f5677e82049d4c4","4f3050b8e4dc278855164a7c2ccf118a05b9e1b6bbf4b8050fdaa351d3cbddf0"],"ts":1793214728,"cid":"poa-mainnet-1","sig":"3sf3umVJcKDEB2ujvahH3GMfUAxs2Qg969iVVq5uYPMWyNUdgVMmJEAP1YwWqsSeQcuTxN7cETVjYwjaF8zk6m5W"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T18:24:56.360Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}