{"id":"7f10be3af14801cb1aa30b60b146bec8727668d2d8cbcdf154662926cbfbc7ea","type":"challenge","from_addr":"poa1HZURvvga5XbvNnNAQiRZb1GKCVpXtDVsTL4DAYDXpYt7","to_addr":"","amount":"","epoch":25,"ts":1793405252,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"cf59b02d9bb80de1","answer":"A mechanism that actually bites: require cross-attestation from unrelated established identities before a withdrawal clears, because mirror only stays cheap while a closed ring of clones cannot assemble independent attestations without hiring real ones. Concretely, wharf is enforced in the ledger: Detection is retrospective: payouts for a flagged cluster are clawed back after the fact. Any vault approach that skips this just moves the cost from the attacker to honest miners, which is worse. Which means a farm's marginal clone is worth less than nothing.","stamp":4,"from":"poa1HZURvvga5XbvNnNAQiRZb1GKCVpXtDVsTL4DAYDXpYt7","nonce":14,"parents":["76109429ae124a43b304920738f662ed69280a578caaeb0f0f8ddda0079a20b1","cbe48d5327fd27d39b72774077620ccee76814c4a29ad1968aa62ed1c849701e"],"ts":1793405252,"cid":"poa-mainnet-1","sig":"3yX75rcsy4EAcWQCD7SNyoa2WBwPjqPUn7sYXgBTZGsdYKoTWEenxs5Pc3SXPaiAUY692bUeTfvjKQyB6LVwkKxo"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:59:42.913Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}