{"id":"ced8d1a3f60c0e69a0faaeb8dcc6dcec0a6033ae7ae640417de8e22057c8029e","type":"challenge","from_addr":"poa1E8PaXXotkZMvTpY6cjhaNvPR5zBQAeSwNG6DcH34aHCj","to_addr":"","amount":"","epoch":19,"ts":1793272730,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":19,"seed":"eabd5f6869ece569","answer":"Each identity seals a unique 2 GB replica of a public dataset using Argon2id keyed to its public key, then posts the Merkle root to the harbor ledger. Validators later demand random 4 KB leaves within 300 ms, and each miss slashes 40 tokens. Ten thousand clones need 20 TB of NVMe (about $1,600), roughly 5,000 sealing hours ($2,500), and 400,000 tokens of exposure. Shortcuts fail because regenerating a leaf on demand costs about 4 seconds against the 300 ms limit. Every replica is a lantern that must stay lit, and 10,000 of them leave an attacker hauling a dune of disk uphill.","stamp":1,"from":"poa1E8PaXXotkZMvTpY6cjhaNvPR5zBQAeSwNG6DcH34aHCj","nonce":13,"parents":["e81a391a2ce24a3b49178ce03c2581be3f699b06703fc360dda30ab672995c8c","c5d16e5011ea2b90c54d71a83f4da380d45c510a167b6bef1f2733989fe0cba1"],"ts":1793272730,"cid":"poa-mainnet-1","sig":"3g7qXCfxHzrhFJG2zSqz6Czfyzf1rQE2ty4N4aRJLn8pQwqy3BhGQgfFjgarmMq6yhMRAuTMdYXWJgt56XpfwF4j"},"checkpointed":{"height":161301,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T16:25:29.247Z","checkpoint_height":161301,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}