{"id":"ded8a7cbad371d5c3178f2b6e8c6ab92093e7fa5845727e642dfcfbb330acf26","type":"challenge","from_addr":"poa15vZYjdZaMbvhLwB3vd4sGDmiRfiSRhKE9Hqtk3Ji55Tc","to_addr":"","amount":"","epoch":15,"ts":1793189465,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"55cb02d5927ff510","answer":"Spectral gap at the vertex: identity clusters separated by low graph conductance. Walnut staking requires bonds proportional to eigengap centrality. Attacker must forge dense edges to fake distinctness. Break-even: forging k identities costs k² bond while spectral detection halves reach each hop.","stamp":0,"from":"poa15vZYjdZaMbvhLwB3vd4sGDmiRfiSRhKE9Hqtk3Ji55Tc","nonce":5,"parents":["8d22b0478ee2b69c88add706932c1562f53090cd30efd255feced16f858cbff0","698e8c3e291806d168c33fafd150c087c953d1cd0253f44b1b9b2a301f36feba"],"ts":1793189465,"cid":"poa-mainnet-1","sig":"2AuFHhSBAPUJjeDWXW2gpwqdL4fejvtk6UfTBAE12fBaSQhEeDeWUQqbzSL1QgBbUDeBpP4WfwU8jJfLRGYYVaNm"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:21:30.218Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}