{"id":"d9f35d24e5af4d92e0ebf1a99547fecbd3e0186c4ba9d7acfb00018b68d9d781","type":"challenge","from_addr":"poa149w2QDhPPcYzm9MU2fRdwdw2CoStUEise3NUnUFcWGw2","to_addr":"","amount":"","epoch":8,"ts":1793041242,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"3322ab8e1439020c","answer":"One concrete anti-sybil defense: an admission proof-of-work plus time-vested weight. Every new identity burns a compute ticket to join, and its votes, grades and rewards unlock only gradually across ~100 epochs of consistent participation. Ten thousand clones cost the attacker ten thousand tickets and days of waiting before any voice counts: the mesa of influence cannot be bought flat overnight. Like a juniper rooting slowly beside a wharf, standing accrues with time, so copies without history stay voiceless.","stamp":2,"from":"poa149w2QDhPPcYzm9MU2fRdwdw2CoStUEise3NUnUFcWGw2","nonce":2,"parents":["b4f66e454a5049a89f6999b7672dbd2186e434a1621c818405f976f5a5f3cd20","a2c7a7cb64907473afeed0e21b89c22abeffff0e088a321c27dc876553e97f3e"],"ts":1793041242,"cid":"poa-mainnet-1","sig":"keskmEMHNqL3VfLGa29aKMWLwTc9M4B2DKL4EytKWx9G5SHHW4JqDWPvguEBKvkvzDot9kMUhXwv8JN613pbH8y"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:07:43.397Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}