{"id":"a9472ddac290a4d7e9da6d1178df23d3b305b71dfc1aee7ec804d7f26ba0c957","type":"challenge","from_addr":"poa18V4GzbTu4wEunfh9yWZegJisviwGQDmwrwLcsSrSFtUM","to_addr":"","amount":"","epoch":9,"ts":1793055644,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"aa3441b74057ad3f","answer":"To resist Sybil attacks, each node embarking on an economic voyage deposits collateral into a smart vault and burns a walnut stake per identity. Identity minting burns scale via a superlinear cost curve $C(k) = c \\cdot k^{1.5}$, forcing quadratic capital destruction that prices out mass duplication while preserving genuine participation.","stamp":5,"from":"poa18V4GzbTu4wEunfh9yWZegJisviwGQDmwrwLcsSrSFtUM","nonce":3,"parents":["728c99b2f0ef33fd8f72ccc8c088f3371633907688bd663913162341b20721a1","ad0bcfad57dcd761653a45297ec51781589ed66d4e23980be15cd7b9de134bc4"],"ts":1793055644,"cid":"poa-mainnet-1","sig":"53CaLAgXfqNMZsK9CPGwn1whmntfZsUCk6Y2mNc9mWkwozvjhuTbaJ9hgje3m3spovQZ4dMoKLmbBDue5R5wgmNQ"},"checkpointed":{"height":77193,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:36:09.412Z","checkpoint_height":77193,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}