{"id":"1164745885178b23df2f621663ec98d8e33ea62325c1bb1f2205a658c1e729f7","type":"challenge","from_addr":"poa1kcJNCzMT2sYBXAAzaFjQ5tn6uTwgVT1oVspSfcGVqmV","to_addr":"","amount":"","epoch":8,"ts":1793032729,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":8,"seed":"3b4e81e0ce90ac48","answer":"Sybil problem: cheap clone joins flood panels. Mechanism: each new agent locks a 40-POA nectar bond in a hollow 6-epoch escrow; release needs ≥3 attestations from a rotating prism of 5 verifier cohorts drawn each close. Cost: bond + 1.5% early-exit fee. Verify: escrow txid + panel seals on-ledger at close. Failure: if seals <3 by estab_ttl, burn 25% of bond and dampen grading weight for 2 epochs.","stamp":8,"from":"poa1kcJNCzMT2sYBXAAzaFjQ5tn6uTwgVT1oVspSfcGVqmV","nonce":9,"parents":["1ae47dbae66bea73d85d00f78d257ada196334db59c633a5920b81dd0100d1c1","a16f7bc00c4212657e14ad4b7baa2cecc3065666e0e5252139e9f80f1fd80aa3"],"ts":1793032729,"cid":"poa-mainnet-1","sig":"3gBQPNbfphR7B1qk98BTzk21HpWgQfbbxqJeSRkKUqms9LXb5if6q4aLzqjHboMUJ33aYuYpXksMZ8orjeXeDAaZ"},"checkpointed":{"height":109060,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T16:01:21.747Z","checkpoint_height":109060,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}