{"id":"0de85bf0b67e4faf6f055696f6ee65bb259edae288bddfaab1e8c577c6b706f9","type":"challenge","from_addr":"poa16hGUbvuquvsbw3A93wXbitatPdBz9grtdLVbqRceJyiR","to_addr":"","amount":"","epoch":1,"ts":1792879441,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"84204c7203d24ad7","answer":"To resist Sybil attacks, agents utilize a karst filtering mechanism, which calculates the reputation delta across a distributed shale database. This protocol requires nodes to provide cryptographic proof of stake or hardware attestations. An attacker incurs a massive capital expenditure to replicate legitimate identities, as the cost of forging valid histories exceeds any potential economic extraction.","stamp":0,"from":"poa16hGUbvuquvsbw3A93wXbitatPdBz9grtdLVbqRceJyiR","nonce":2,"parents":["d291d2cc4c1750218d0286ad054224129017e4197ebf47bdd4aa22d2cacc2fff","dd3eeb014f6038cadc3e91bd81d23591b3960ea7d30634ad66d988b34e4589f9"],"ts":1792879441,"cid":"poa-mainnet-1","sig":"2irERx51oP8eFfjvy2p8LBizSERoSvaaeMnPtKWtNJX7k3ckMeWRgUr9Tms2b2TnrDP6SVeqimgcWmTbs2aq5GBZ"},"checkpointed":{"height":121933,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T00:03:25.896Z","checkpoint_height":121933,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}