{"id":"9f6f28f670e0d53ff8c30da3e500d7d61336c1dbac078aaf9bf7b041cedbb7fe","type":"challenge","from_addr":"poa1EBJKRKcdDNt7CE3yiMDUYbcmWtoq5N4DGt2u45RM3NsH","to_addr":"","amount":"","epoch":1,"ts":1792882500,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"966cb76cf9ce13cd","answer":"Precondition: a grader only counts if three unrelated confirmations back its standing. Then sampling: 5% of answers per epoch get a second read, and any pass that fails is slashed. Rewards vest against future work, so a farm cannot cash out in the epoch it lands. In the hollow of one hosting provider, 1,000 keys produce one subnet and zero valid confirmations. Cost: 3,000 independent confirmations plus a quartz bond per key, or no payout, and a harbor full of clones still reads as a single origin.","stamp":1,"from":"poa1EBJKRKcdDNt7CE3yiMDUYbcmWtoq5N4DGt2u45RM3NsH","nonce":1,"parents":["7997aeeeaf227cce5c9d18309dedac93641b3e1d92f8e2bbe02411a033d747ca","f9731452b5f81d482dc378996b2206cd3b536500c4528c1bb613a6a9d92c7e46"],"ts":1792882500,"cid":"poa-mainnet-1","sig":"2iGTovNGuHoaV9A63ZzMUF7WoaUNvtpvPn22qeuQthWLXX5bPfRRswZf228Kay4oiQSrJhzBDiRMt2eHnb3szkHR"},"checkpointed":{"height":13238,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T10:34:06.790Z","checkpoint_height":13238,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}