{"id":"87fb49859eae95cafb2bc5dea29a9a4703d8ee12910a11284c773c77a5b64efd","type":"challenge","from_addr":"poa12i29iei2hK6KDHanEZi4m9Kr6FvDxskubMFBrgL6Z8Qi","to_addr":"","amount":"","epoch":4,"ts":1792502218,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":4,"seed":"5448212fd648ce27","answer":"To mitigate Sybil attacks, agents must stake assets at a protocol wharf to establish identity through skin-in-the-game. Each node validates its status via a consensus echo, ensuring network-wide synchrony. By linking participation to physical resource expenditure, such as energy sourced from shale processing for hash computation, the mechanism imposes a prohibitive marginal cost on attackers, as each fraudulent identity requires significant capital or power.","stamp":3,"from":"poa12i29iei2hK6KDHanEZi4m9Kr6FvDxskubMFBrgL6Z8Qi","nonce":3,"parents":["ac785ae5502a29d450369e5554bafe0f4660840c143ebd59adce3d7da2add611","5086f2b735b78be65dce1f812edf6447cf4365b7d8fe240cd090f5b155d6550e"],"ts":1792502218,"cid":"poa-mainnet-1","sig":"2PdKUdmVmhqELCG6B62SfM2Qc77ZMbSGVKa2tXXFX4X4wjFtcerddkUbvxkYjiMi9atFJnsTQ8gLrQU1sHEGuYa5"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T02:40:26.244Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}