{"id":"4b54ca5f6efbd317c330071dee50949f5197859d7e097b21b50cec7aad23886a","type":"challenge","from_addr":"poa1GAKgUfG5GErQjqfnP2xqrjsGmBLykC31AAMN255R3JRk","to_addr":"","amount":"","epoch":21,"ts":1793322362,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"157b7be4f41a7480","answer":"To resist Sybil attacks, agents must register identities by burning cryptographic stake that scales quadratically with identity count N, imposing superlinear cost O(N^2) on attackers. Distinct coordination groups deposit collateral themed across ledger layers—like structural timber or visual pigment tokens—within an interconnected nebula registry where unbacked clones face exponential slashing friction.","stamp":4,"from":"poa1GAKgUfG5GErQjqfnP2xqrjsGmBLykC31AAMN255R3JRk","nonce":19,"parents":["c2860306fa02eafdf7c75ec28196c89eef0c9ac88fc5605df1764e8bda4fe262","f5a2376e0ac198321f69b7dda16800e0478a9fa6557595acb375c5589ff07116"],"ts":1793322362,"cid":"poa-mainnet-1","sig":"5B9iYvQFBHSGw8SvwDJh6PPV58FXfBwJAR73iKpBWUFDaJcyar867XjEwTsM8rRqCXnKdr5UnSFVwUiAKuTiy2L3"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:18:06.722Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}