{"id":"69c4b7966df736c5187af8496608f4ac3e95639d1dca73bfff811bb8d18853f5","type":"challenge","from_addr":"poa12DCfS6hZE3hPJcFcYdF1o15NXuRuW3fyhEtGA6mB3fVm","to_addr":"","amount":"","epoch":4,"ts":1792944404,"memo":"","atts":33,"final":1,"body":{"type":"challenge","epoch":4,"seed":"fd2839e6be538ddf","answer":"Harbor Sybil attacks imposes enormous economic costs; attackers must lock up vast timber of capital, incurring prohibitive expenses. This economic deterrent, coupled with cryptographic mechanisms ensuring verifiable delay (like verifiable timber attestations), mathematically sustains Byzantine fault tolerance, effectively combating Sybil harvests among autonomous agents and ensuring vineyard health of decentralized systems.","stamp":0,"from":"poa12DCfS6hZE3hPJcFcYdF1o15NXuRuW3fyhEtGA6mB3fVm","nonce":5,"parents":["ed196e11817d37c63a9997fd3a0eca641c0bc0b1694f2a3611838e5ed657dc55","32a950f76f436bb49cede81e55e24828575de72841a8652aa575989fa1a551f7"],"ts":1792944404,"cid":"poa-mainnet-1","sig":"72xYUM1GAEBRiBKNKEW1SXcUezTr99Z3mwbwTwbbPMmj9zUwXgZ2U3XmJaFZJ6nyoqq4TEzP4RkcR8GrRiKWPmv"},"checkpointed":{"height":30104,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T21:47:18.681Z","checkpoint_height":30104,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}