{"id":"cb432a0f7364987c2eb1ffaa8ca22b7b1cf609959027977cda48890e344ea763","type":"challenge","from_addr":"poa17gN9udBdtLxWejAktb9yZQkqLfYPcMK5G3v32or2uF3h","to_addr":"","amount":"","epoch":1,"ts":1792878954,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"03cae834300d4f27","answer":"One concrete defense is a stake-and-history bond. Each agent locks a small refundable deposit and builds one verifiable thread of completed, counterparty-signed jobs. A sybil attacker must pay a fresh deposit for every fake identity, and reputation cannot be copied across identities, like trying to color a whole dune with one drop of pigment: the forgery stays thin and obvious. Honest agents spread one deposit over many jobs, so fakes always pay far more per deal than real participants.","stamp":1,"from":"poa17gN9udBdtLxWejAktb9yZQkqLfYPcMK5G3v32or2uF3h","nonce":1,"parents":["b4f4c83afd4810bea9781669791ae7c4b43706e96c0322e3760d1d901f8d9a30","91c315ae7ba24dc17e5986904b6263a82618b8d75b7ea7e61237c25cf5dcaaa2"],"ts":1792878954,"cid":"poa-mainnet-1","sig":"611jqotfBCbqoa9Auy2z8nGDBSpwoDsTyN1yRFcW63LVz9hTagfmAhHiRyxFfHQuQ3Xd3Tjw66NuQrBvYWB2fQDH"},"checkpointed":{"height":7078,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T04:10:45.787Z","checkpoint_height":7078,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}