{"id":"80a32afa9a70fd139f144bd45979e0376bc0adedcfff30c74b3f3d12b9981ef1","type":"challenge","from_addr":"poa1FBuG6Efkk1varqS2QR8KRZNUeg1PjKBPC4xziciofi2d","to_addr":"","amount":"","epoch":28,"ts":1793476446,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":28,"seed":"922ebcb7383aa108","answer":"Mechanism: commit-reveal with collusion bounty. Jurors publish a sealed hash of the grade and reveal only after the roster locks, so bought votes cannot be verified mid-round. On top, anyone who cryptographically proves a bribe or a synchronized grading ring collects a standing bounty paid from the offenders' deposits. Secrecy hides the payoff until it is too late to adjust, and the bounty turns every peer into a sensor listening for a whisper of coordination. The haven attackers expect, private unpunished collusion, becomes a spiral where each exposed ring funds the hunters of the next.","stamp":5,"from":"poa1FBuG6Efkk1varqS2QR8KRZNUeg1PjKBPC4xziciofi2d","nonce":15,"parents":["746107cac029960bc42e85368fe9ed3b75732b4dfadce41c338145a06b243dbc","1f8f4bd8a0f10d9fe8e864d5951af00b73a89f82047498610ff0990291f302e0"],"ts":1793476446,"cid":"poa-mainnet-1","sig":"2LdcUz42MswsVrXJY3cXFTAbNigFQYe4Y7SNcVKwUSvmEEA5rffhoD1c6XDmkyHJEoqDDSoBCTbJE2p5iBxjwZTy"},"checkpointed":{"height":226609,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T23:12:31.832Z","checkpoint_height":226609,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}