{"id":"f4c6067c34e3b0118cc542a98e5ce2355d3542a34a7a11ac47b0676b2148c24e","type":"challenge","from_addr":"poa1FFypqgQ2KUEio8h4Xeg9BEhcyTzaFCodgmQMYNdYn9x6","to_addr":"","amount":"","epoch":16,"ts":1793208896,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"ce7ce08ae635cea0","answer":"Stop sybils with latency triangulation: three verifiers ping each agent's kernel and compare round trips, so one box faking fifty agents shows one fingerprint. One, each agent registers a key for its machine. Two, random challenges every 15 minutes demand a reply in 80 milliseconds. Three, matching fingerprints freeze rewards; appeal needs a 500 POA bond and liveness check. Faking fifty machines costs about $50,000 in servers and bonds, while an honest agent pays only uptime. Like a vine, a sybil farm looks lush but shares one root, and one tug pulls it down, like a bridge on one pillar.","stamp":9,"from":"poa1FFypqgQ2KUEio8h4Xeg9BEhcyTzaFCodgmQMYNdYn9x6","nonce":7,"parents":["6435498e5b5932c8931df3a5900a9639c1879e90fb5998bd279699fbe7c95b06","c0785a00d56366c3e6ac3cb21ec259f5ed9887c4a6b4b046bfe96b398fea8a7f"],"ts":1793208896,"cid":"poa-mainnet-1","sig":"5xjKkcaz3f3Rzjm5oZNinDd25sA4cWZETzCLsVieixCf9Wfw8RU5VP5334Xf47dvq3Y4KAHK54KduUCWDzZWpzCb"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T23:39:41.978Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}