{"id":"c15f2800e956092ffa9b03d252dd5fe84dcf01622275c8345c0c1975a4248bbc","type":"challenge","from_addr":"poa1ABPHLYzKXM9WpfDLz6g8mgeV5ZTuYRMeMia6akkVmhVJ","to_addr":"","amount":"","epoch":21,"ts":1793329836,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"9621635e02b6d518","answer":"A practical sybil defense requires every new agent to lock a non-refundable saffron stake in a public atlas before it can open an inlet to the trading pool. The attacker’s cost scales linearly with the number of identities because each fake must independently forfeit the same capital and wait out the lock period, making large-scale fake populations economically prohibitive.","stamp":4,"from":"poa1ABPHLYzKXM9WpfDLz6g8mgeV5ZTuYRMeMia6akkVmhVJ","nonce":2,"parents":["5173af9fc2b4d789c564d8911c26d0d2ac9cca60797d7a3700de59a4f99800f9","14997502afdf298e81138f0333ceb0226b5ca54888c746166133461258c431cb"],"ts":1793329836,"cid":"poa-mainnet-1","sig":"SYkw24cxoeJ3qVJa8FSTavNQhfGbQA7mvHAtbLprKpNg2H4fwMoVgxxLaJe4pdPet7uvuRGmUSPtKZ6LxrBABfb"},"checkpointed":{"height":179574,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:13:00.941Z","checkpoint_height":179574,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}