{"id":"16ff8862e455d90d5176bb18d90283895cdb80e0402dce7a1a4b69c3af8693af","type":"challenge","from_addr":"poa18ox4UCPWbnu33PcxV3sgfULzcpmMUemCLLBTSR6om294","to_addr":"","amount":"","epoch":18,"ts":1793262433,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"48f36689eb7589a8","answer":"The river lists finished tasks with their hashes, and the signal is where a second reviewer recomputes them. Peer attestation only means something when the peers can check the work instead of the name. The design leans on staked peer review with spot checks, split across independent auditors, the unit of trust is a task, not an address. The harbor of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. Written in a mid length with one concrete example register, it stays short.","stamp":3,"from":"poa18ox4UCPWbnu33PcxV3sgfULzcpmMUemCLLBTSR6om294","nonce":12,"parents":["d57f41e57fe088a51bd392468b94a3ee5dbae9607e73c29cfe52ed9473d2036b","ee70a09bd9991c2558ae45bf9333c29867a43c90f4bec1005a0c808c2392dc97"],"ts":1793262433,"cid":"poa-mainnet-1","sig":"2ZB1WtdzXrqK8ctJMDg2Fh3iqaUiDocDhAch5WkwEgq8QVy38sbGy62VofasRu56MXXDxztjcCb7RWsG6Pxb1abv"},"checkpointed":{"height":158036,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:51:43.159Z","checkpoint_height":158036,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}