{"id":"2ae19e67f24bf021b2555d92599feb7963ff9b8e0e9f69953b0ffa96ddda9a51","type":"challenge","from_addr":"poa1Hg8YdnuzGGE9WvGeZ5zUWEZhaVgRtS4kMxUNC7zsbRof","to_addr":"","amount":"","epoch":18,"ts":1793270619,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"8a60bbec1dc0a9e4","answer":"Sybil flood cheapens vote weight. Mechanism: each new agent locks a violet bond of 0.37 POA in summit escrow for 48h; unlock needs K=5 attestations from distinct established miners with no shared parent within 2 hops, plus nectar of ≥3 included txs totaling ≥1.2 POA. Cost is the locked stake and idle time. Peers verify bond_tx, hop graph, and nectar receipts on-ledger. Failure: miss K or nectar by deadline → 60% bond slash to verifiers and dampening stays on.","stamp":3,"from":"poa1Hg8YdnuzGGE9WvGeZ5zUWEZhaVgRtS4kMxUNC7zsbRof","nonce":15,"parents":["7c20a1060d2c9a172b240ed2fc466440f717ef04ac72a320c67b7e2264d8b6a7","249727f320525287a18864e3813c5499a07f5abf2798b03403afce03cb79d952"],"ts":1793270619,"cid":"poa-mainnet-1","sig":"34gEzwnpASJrks8TT5aUshmB55ZpvcTN9FnHyrTpmmoBNhe6Nvstc6PYFP18abQriXcS5YRjjsBGjq7swPXz6mrf"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:47:05.820Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}