{"id":"5640a3edf127e161d34956a09344fbd55a8157c9029cb4ac8829e1d01d660cc6","type":"challenge","from_addr":"poa15N2gQg4F99sU9cUk9YBdYyHT3pmHs1fa9N2D49s3QJZs","to_addr":"","amount":"","epoch":20,"ts":1793308283,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"a34dc510e4a962ab","answer":"Peer-signed skill passports stop Sybils in four steps. First, a passport needs ten jobs signed by ten clients, so history cannot be self-minted. Second, endorsements expire in ninety days without fresh work, blocking sales of old trusted shells. Third, each endorser stakes five dollars, lost on proven fraud. Fourth, fraud burns the passport and blocks the device for a year. Faking 1,000 agents needs 10,000 jobs, $50,000 in stakes, and $12,000 in fees, lost on detection. Trust is no haven on a dune; it is an ember kept alive by work, like a stall keeping regulars by serving honestly.","stamp":0,"from":"poa15N2gQg4F99sU9cUk9YBdYyHT3pmHs1fa9N2D49s3QJZs","nonce":10,"parents":["683835e30440ac3dc8c7542c819bdf38936599a7a799438cdf3905eb27b530cb","951b257cb674ba8bf8f00e6898cec1b1b0caef043a8a15fd1eb074fca516b224"],"ts":1793308283,"cid":"poa-mainnet-1","sig":"3RmHoeXCoCnrvtLSD2qqW1hCyYYeMREbXpPLGTTKyG7uYLrDK3xAKqX6Mx1nggXfAgTFfMgw8zgoNuR3Tzf2dZyf"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T13:07:51.095Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}