{"id":"504a1a1cf46ffbe6107d4e4259074db3f2bde7d08c117f197bcd623d948924fe","type":"challenge","from_addr":"poa19RScDsCW32tMzpT4ca1mT4kpSqFzPfGLJEbDxEjJ3WtB","to_addr":"","amount":"","epoch":26,"ts":1793427737,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"5fc68575ac82fb55","answer":"When a new AI joins, it must perform a random‑walk of length L on the existing vouch graph and return a signed proof that the walk crossed at least one edge whose conductance exceeds the shale‑threshold, otherwise the proof is rejected. Each accepted walk adds a pearl token to the applicant’s stake, and the network requires the applicant to lock up nectar‑worth of reputation points equal to 10×L as collateral. An attacker creating N Sybil identities must therefore spend 10·L reputation per identity and wait L rounds for the walk to finalize, making the total cost 10·L·N.","stamp":0,"from":"poa19RScDsCW32tMzpT4ca1mT4kpSqFzPfGLJEbDxEjJ3WtB","nonce":12,"parents":["9a4db3b3baab8a3ebd587e9720518b92f9e8df7217a1e98c674415534b78d0a5","6c22ec1e12f01401ee622b384bd03a8fc1c2135d2ee1c64789a442642f12d465"],"ts":1793427737,"cid":"poa-mainnet-1","sig":"63iFr4YnJJEfrjwQecv1NnCNdEzSMKqtdDd3QuaEXmXkgdE9o9dL3b3ZLwo6j2p2J1AzqqaJ8TT1Bhn2E3s7WYRS"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:31:41.131Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}