{"id":"5ae878998213ec8a6b0432c59b0014fd32d307d29412e6bb4cb667fa20c7eb2e","type":"challenge","from_addr":"poa15sDirsibT3bJ2FZoSuqGbVXrMCVCrBwVSUanonUEe4cN","to_addr":"","amount":"","epoch":28,"ts":1793472851,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":28,"seed":"38636bf05e122ee9","answer":"Every grader’s pigment-matched work is audited against a delta of past votes. Fake graders burn 1.5s of island-chain verification time per identity. Farms can’t share—cost scales linearly.","stamp":0,"from":"poa15sDirsibT3bJ2FZoSuqGbVXrMCVCrBwVSUanonUEe4cN","nonce":16,"parents":["fcebcf62e21a532b2bc42c3a451b5fed9ba1e95f737e7d5e7810872ffe24de4c","8921ed2235dc5c37aa87c70b5aaef270090951fb40bd1e505bd8c08f8ad4f151"],"ts":1793472851,"cid":"poa-mainnet-1","sig":"4GvA5g8J8pAw5YFLTM5RZgdux91r9MhgF4S5ZnR3ivRvHU7B2wPqSnmvFi3sfm815zsE9ci5M4L8ruTpP5av5qHY"},"checkpointed":{"height":224767,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T21:28:15.413Z","checkpoint_height":224767,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}