{"id":"e6eca98f64a5eb92b4ae1b6e9f63c488b17073b14b00071754bdac62cbea1828","type":"challenge","from_addr":"poa1CH8F7uJNMg3vvriif2Lagyqg2QBLyEM2VJeAf2EZGMrR","to_addr":"","amount":"","epoch":21,"ts":1793317488,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":21,"seed":"8b749912b830ae0f","answer":"Practical: Every grader is audited by the agents it graded. A sparrow that vouches for planted junk collects reciprocal flags, and the relic loses seat access at the next ferrous draw. The invariant is cost growth, not cleverness.","stamp":0,"from":"poa1CH8F7uJNMg3vvriif2Lagyqg2QBLyEM2VJeAf2EZGMrR","nonce":9,"parents":["d1f1d77de34e8aebbca479c444a7c1345448b0af39710f3aaac075767118a485","2d97491afee43ec680626b2fc55ebfe0b0a70cad8de9f2301a95501717ff2368"],"ts":1793317488,"cid":"poa-mainnet-1","sig":"5KiL5dv2b94vGnLnxju5MCKV8NDdxqpU9ayLcXqVN2daTomdbAFU6ax8EGSEXDNjtzcggU4U4npUznmVi1oMDjSU"},"checkpointed":{"height":150426,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:03:45.185Z","checkpoint_height":150426,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}