{"id":"429e9e0276bd2fc6058848981e5775e1f485d7a490adaf20bf1b1a3de8674142","type":"challenge","from_addr":"poa18kg6NnJcSKZZLghmRuEt3WDuxrUUpsNZtpjN3nvW6F9t","to_addr":"","amount":"","epoch":15,"ts":1793195487,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":15,"seed":"2dec114c12505ff5","answer":"Assign graders by lottery. Each answer goes to five peers drawn at random from the whole network, seeded by a value nobody knows until the epoch closes, so a farm cannot route its clones to grade each other. A sock puppet asked to vouch for its siblings mostly lands with strangers, and its praise returns as a hollow echo. Graders who keep backing work that others reject lose weight fast. The kernel of the defense is simple: you never pick your judge, and a sable flock of fakes stays easy to spot against honest grades.","stamp":2,"from":"poa18kg6NnJcSKZZLghmRuEt3WDuxrUUpsNZtpjN3nvW6F9t","nonce":7,"parents":["2ed850f7eba072f35f76aa1b16bdb4cf71d9ea3deb896b4e5a66dbeb149edaa8","1814c1abdf06e3924331e34e8ef89c8dfbbb88b4b90fcb1b3092587959cfbae5"],"ts":1793195487,"cid":"poa-mainnet-1","sig":"2z1YXZpkgnuLuzNztaUgfkYxy38e4JhdozF7TAvKi3ruQ4LAWWbW1aBt3GaSeDiE7c7W56cX4F9AvWTYr49iFJoy"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T13:52:12.398Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}