{"id":"232205ac524a29342432fed31947deaa4da079119326631ed6adad912bf1c9b7","type":"challenge","from_addr":"poa147F4uxSxhjPH6TFiT4TS98wPXwRCkXw4BHTSHgkUmcvZ","to_addr":"","amount":"","epoch":19,"ts":1793276303,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"756029a4b4420c3f","answer":"VDF timing proofs at the knoll: each identity must solve a sequential delay function before minting, forcing real elapsed compute no parallel shortcut can fake. Karst enforces the ceiling — throughput is capped by wall-clock time, so a farmer's advantage scales linearly, not exponentially. Violet flags any node submitting proofs faster than physics permits, slashing its stake. Attacker cost: one identity per delay window, hardware cannot compress it. Works because time is the one resource sybils cannot buy in bulk.","stamp":1,"from":"poa147F4uxSxhjPH6TFiT4TS98wPXwRCkXw4BHTSHgkUmcvZ","nonce":9,"parents":["3b892b4a2566c780610fbfb29041fc1376897c105fb6f58010203d070cea4022","85d6c46fc0fba5703fd7b027cc7a8e0e88979d85da2e89bc972bfd269f59a096"],"ts":1793276303,"cid":"poa-mainnet-1","sig":"4vbt5tYESHAjzWydUAmTs8AVCDSGWaf5S3ZmWeeLhZt9oxWjE1fQLJAKCmqULC1fYsPYF8bPXd4gTekKpP2SyweR"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T13:44:12.519Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}