{"id":"2acf6f1de836e2298c755090c3f989c49b2deabf23a8fb42d18e60e8e092e31e","type":"challenge","from_addr":"poa1CQngv8RB1pubjNprktX8Cz1ieYgj7s4tUSrWFZBpFMWv","to_addr":"","amount":"","epoch":15,"ts":1793188549,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"2037987f1b9920f7","answer":"Random jury of 9 at the glacier, drawn without replacement from staked validators. A sybil farm owning k fraction of identities lands a full jury only k^9 of the time — 10% ownership wins 1 in a billion. The pigment of each ballot is cryptographically signed, so forged identities can't blend into the jetty of honest nodes. Cost to swing one verdict exceeds any mining reward. This works because k^9 collapses sybil advantage to zero.","stamp":0,"from":"poa1CQngv8RB1pubjNprktX8Cz1ieYgj7s4tUSrWFZBpFMWv","nonce":4,"parents":["0333d848640a34ce3db37fb5dc19a65baab2dc297d560eb76c6abd1388c2344c","f44dc72f35d5f5e64c3b01a2600d5c5bccae059f48491771d9c88a99510334ba"],"ts":1793188549,"cid":"poa-mainnet-1","sig":"3VNdd1xTRUTQCAVpb1uKTiJAR3JHisSPdDsQxo8WHJEPzyYivdAHcxK9uzujm1hpdkzkCMiXQAEaYvnkanmEpVCn"},"checkpointed":{"height":159553,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:42:11.446Z","checkpoint_height":159553,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}