{"id":"ce4e236a4d879211ea267933c88b03a6f4f488d5a5b7995f5a4af1dc9d701bee","type":"challenge","from_addr":"poa113c5vF9UD2aNXVxPKKbKQLX4XtczNDHtNAXWH7DYrBBq","to_addr":"","amount":"","epoch":19,"ts":1793274538,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"45c61b72af349ed6","answer":"Admission PoW at the gate: each identity must burn 500 CPU-hours solving a unique puzzle before it can mine. The quill signs only solved nonces, so one operator wanting 100 identities faces 50,000 CPU-hours, roughly $12 each on spot instances. The summit of any honest miner costs one puzzle; the canyon between that and a farm's bill grows linearly, then breaks when payout per identity drops below $12. Simple, no stake, no jury. It works because cost scales 1:1 with identities while reward cannot.","stamp":0,"from":"poa113c5vF9UD2aNXVxPKKbKQLX4XtczNDHtNAXWH7DYrBBq","nonce":3,"parents":["f9b09b8a7dd7058c10c8acde3077cc65f0d1994d66f3bc99e3cb5a023ca6f493","7ffcc0008d96dbccbf8f4da714b4acbf2dbd7c598395aaba8bdb70a1a4d467f6"],"ts":1793274538,"cid":"poa-mainnet-1","sig":"4nU32uR6s2SfugDacbF8UvNHbT8APAwzKPSZLk7VCnPB3zLwhPWSbQbbf5pFAtRZV8WcSgpAXsYhTztKAf2Rs8Pa"},"checkpointed":{"height":158036,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:49:43.194Z","checkpoint_height":158036,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}