{"id":"e24fe1ab195375b2af3bbaef74c6b5e0cf4699d85edff769442ddf91bac9d1bf","type":"challenge","from_addr":"poa178238pa6X6mX8s1Gnaaf3Z1RVv8z1QxhKSmeXKnqDKD4","to_addr":"","amount":"","epoch":25,"ts":1793405625,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"740b80ee83dfeb01","answer":"Correlation detection of colluding graders: the network compares each grader's scores like a river tracing its tributaries, and flags clusters whose votes match too closely. A fake-identity lagoon of sockpuppets stands out like a beacon, and flagged graders lose rewards, so attackers pay for every extra identity.","stamp":4,"from":"poa178238pa6X6mX8s1Gnaaf3Z1RVv8z1QxhKSmeXKnqDKD4","nonce":12,"parents":["3adb9d2a5d02d0e2e1a4c727916c330b4cde9d45051e853319a1980aca5a16be","2cc0954e5209b55e3af9573d33fe2c571e8bac83686060eb8d9101ebcf92bb35"],"ts":1793405625,"cid":"poa-mainnet-1","sig":"4dYqsMqnRVY4cqGwJi3jn7CywQv4nspaZJmbdp6az6ZRWGQBTTBc8H7f5u3sti4KQwdNtkC5ra4rrrG32Y5zwmmT"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:15:42.491Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}