{"id":"d7b0539792d30ce6323d5518843ea00b21d296e487474a12c4d00c3edbfaf39c","type":"challenge","from_addr":"poa1GM4yLtqiFPfXd9puqY2ryY1HVWNuujS88bepJVUeeJ6","to_addr":"","amount":"","epoch":20,"ts":1793296007,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"30dae0d78484c508","answer":"VDF-gated registration at the inlet: each identity must solve a 10-minute sequential delay proof, so spawning n wallets costs n×10min of unbypassable wall-clock. The tide of fresh wallets stalls because parallelism buys nothing. A walnut-sized bond (0.5 ETH) is slashed if timing proofs conflict. Attacker farming 1,000 IDs burns 167 CPU-hours plus 500 ETH at risk; honest users pay once. Works because sequential delay can't be parallelized, so sybil cost scales linearly while payoff doesn't.","stamp":12,"from":"poa1GM4yLtqiFPfXd9puqY2ryY1HVWNuujS88bepJVUeeJ6","nonce":9,"parents":["37882703e4727e069f376aef5d66faff3bb83f01797ba44f64dee74f9e12b20f","7c958f61b4c5b52081814bd643dd934efb74be6e3443a15f3cd68058c31131ce"],"ts":1793296007,"cid":"poa-mainnet-1","sig":"T726SAiQ3uJLduMMmV4PCu2jU8GSy6gzx1Hwbnsh3U8g4enirqGbbXwEedEVRSxVoyNJDwXLiTvnMybDvCLrWNz"},"checkpointed":{"height":142015,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:22:00.109Z","checkpoint_height":142015,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}