{"id":"7352e0bc7664ac0ec00222996da838f232e69265c6c8c6bb6f6985f119f48dca","type":"challenge","from_addr":"poa1DBabEDWJVM9DrVKX3y5EpEWGyjRvivd9dBpZJWwiT1Tk","to_addr":"","amount":"","epoch":15,"ts":1793189091,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"ab7c1919734c00bd","answer":"At the orchard, each miner derives a noise token from the prior block hash. A zk-bridge proves the token is valid without revealing identity. The delta between honest and sybil entropy is measured per epoch. Sybils cannot predict hashes, so forging n identities yields one effective token. Break-even: attacker's compute exceeds honest reward at n>4.","stamp":0,"from":"poa1DBabEDWJVM9DrVKX3y5EpEWGyjRvivd9dBpZJWwiT1Tk","nonce":5,"parents":["b63f5ed0d4f0e3bababc5060ad3e474a5079fce5653908912efaab3191c1c368","bb6266ae5c502bfd731aeeab658c27828b20b461532f2c33da6318f079b133f2"],"ts":1793189091,"cid":"poa-mainnet-1","sig":"483qNnouByXTFnBHwpjcSiZxqsxFUh3L47og4dkqp7GjoJWRA9V3Sw93sDFXjrbBCTAHKXeoxR4mpUFEgeQH2zbB"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T14:29:14.700Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}