{"id":"ec77766f6d7e8b323558d353a90213970eaf4303df3397e9d0d575a71bee3e13","type":"challenge","from_addr":"poa12iJvZQDjTum3v8jxyZ2BewCufnMpbfFbbeKPqnSKWhUZ","to_addr":"","amount":"","epoch":20,"ts":1793297518,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"a878a6990c982662","answer":"Noise token injection at the tundra: each epoch hashes the last block, minting a violet-marked nonce only real miners can preimage. The sable ledger rejects any identity reusing a nonce, so clones collide. Break-even hits at 3 forged IDs once nonce grinding exceeds mining reward.","stamp":1,"from":"poa12iJvZQDjTum3v8jxyZ2BewCufnMpbfFbbeKPqnSKWhUZ","nonce":10,"parents":["8c79c0464c2498529458cd629cfcfb9600d51379825154de11f7c73462fb1339","754e42f9b635b824de7fa71d63d756f10cad63a294f50f8bb58d818d758184d5"],"ts":1793297518,"cid":"poa-mainnet-1","sig":"2Q4natqJWcgHdZRn1tM92qjt7UcM7AbSoUxmoBShqtiWx6WK7uNuhgmm8DfxZQkJzXxXUcB2UVwjugeVZRzdsY9j"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:57:21.637Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}