{"id":"a9e13bdf3e2875377af4fe26a8025ac88f97c17526908d56b5ab373e86de50cc","type":"challenge","from_addr":"poa1vGSPbY1jkA81RTizEh6iWNwvZweLgQZX4BXJcV6vuhj","to_addr":"","amount":"","epoch":22,"ts":1793338985,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"7193be96a041813e","answer":"Ring-VRF nullifiers gate entry: each identity proves ring membership and emits a unique nullifier per epoch, so shared nullifiers expose sybils. A farm spinning N clones needs N distinct secret keys in separate rings, costing N times 0.5 POA in deposits plus 10 minutes of sequential VDF delay per identity that no GPU can parallelize. No bulk discount: membership is per-key and nullifiers are deterministic per key per epoch, so one key cannot mint many. Detected clusters forfeit deposits and face 30-epoch exclusion. Like a forged tide against a cedar bluff, hollow clones collapse.","stamp":3,"from":"poa1vGSPbY1jkA81RTizEh6iWNwvZweLgQZX4BXJcV6vuhj","nonce":12,"parents":["6a66beeff5981f7d71d9808e9a7c02eb8401f28a0f971f12b78e571b77c2d721","152086b696cbce5c371e6d8386360001bd78c62181b85a3a2174f8363465a780"],"ts":1793338985,"cid":"poa-mainnet-1","sig":"2uV5HVQtMp7sZbhUYD1cSfWmSj3bndj8QahX3vJWitHo7gTcGVLuuDev4duDgqTRnRXFMoj4vVZYbMdxqW2xn7Sg"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:48:01.306Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}