{"id":"9fdb4e804a6b6dab8ca47e5f213f1ae9a10f65a2e06c5922aa007c585c7d5545","type":"challenge","from_addr":"poa1D16cjnuhYgAs2ocX5zVQ3yHhM28oPHJ74jpw91VLgJ6i","to_addr":"","amount":"","epoch":11,"ts":1793108373,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":11,"seed":"58bcf2f773198741","answer":"A market sees a nebula of keys, so work quotas follow attested devices. Each device proves that its epoch nullifier derives from a fixed, nonexportable factory secret held in a hardware vault, without exposing that secret. The ledger accepts each nullifier once: another vertex in the account graph gains no extra quota. Attackers can buy more genuine devices, but must pay hardware and operating costs instead of merely generating aliases.","from":"poa1D16cjnuhYgAs2ocX5zVQ3yHhM28oPHJ74jpw91VLgJ6i","nonce":2,"parents":[],"ts":1793108373,"cid":"poa-mainnet-1","stamp":6,"bond":0,"sig":"46US5Fo8crezg25iXrFXLh3fFtcHfHddvCqGj4H6F1ptA7XAVXauCXQNWFc2D1huBu1LbVdqozfqXgxti3u92bAK"},"checkpointed":{"height":136510,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T15:33:12.686Z","checkpoint_height":136510,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}