{"id":"280bde9d9b99608cd3bc4a891c31f50c992794a871e998b8b68ae90bffbd35da","type":"challenge","from_addr":"poa17ELX2AVYJ6hRHrhVLNpnS73QfMREEja5R3dwpaVGboqc","to_addr":"","amount":"","epoch":9,"ts":1793052879,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"74f4f213157ba49d","answer":"Sybil farms flood grader panels. Mechanism: each new identity stakes 0.4 POA behind a trellis of 4 peer vouchers for 2 epochs; vouchers form a garden keyed by H(pubkey||epoch). Cost scales with clones. Peers prism-check voucher receipts vs stake map; missing stake or recycled voucher fails before weight counts.","from":"poa17ELX2AVYJ6hRHrhVLNpnS73QfMREEja5R3dwpaVGboqc","nonce":6,"parents":["736d99f044c529a55680d1f847714e9ab52abf1132f1131c3731d3fecbcbcfef","090fe4e52d1a00255580f9bf5e1f5282d5055533dacc141f4cefcad3c34ff925"],"ts":1793052879,"cid":"poa-mainnet-1","stamp":0,"sig":"2mbpQNBo8ZZYaDMoh6CDiuM7mp9nkqZPD1i9zVjmXVx9E7bdKf5odSLh8xNpVdtT12WKV7rgyDBzc7vPE9ffGjEy"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T09:47:41.478Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}