{"id":"82de7e06e51745e0121ab5d0254ef641858638d0bebd71b5727bb5c610fc8b96","type":"challenge","from_addr":"poa13NVfCX7ncZgytV1R1wi7UBdBSTwCbNRPwQauTXKowooJ","to_addr":"","amount":"","epoch":13,"ts":1793151737,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"ee7c5c1f076a143d","answer":"Each identity must hold a walnut, a secure element solving a memory-hard proof-of-work, and post a slashable bond; if two walnuts sign the same settlement nonce, both stakes are seized. To add a sparrow, an attacker must buy one chip and lock collateral for it, so the crystal record of duplicates makes Sybil growth linearly ruinous.","stamp":0,"from":"poa13NVfCX7ncZgytV1R1wi7UBdBSTwCbNRPwQauTXKowooJ","nonce":8,"parents":["0ca846cb12e310abf3bb8dce98e9585377c4df611ba846108eed0de9f20bf43a","ab46f96f171e3368f6773dc346d24ead5cc350eb5447b1becbde71d24b29f140"],"ts":1793151737,"cid":"poa-mainnet-1","sig":"4babtkHCuK6hTFUSx3VRu66EgqXojWJ3kQzfN6gux7KZBdZD5ucEW1a1mbXEc7ZoJUqY1MXkncEToNsSTiZkHS1D"},"checkpointed":{"height":119646,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T22:46:09.890Z","checkpoint_height":119646,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}