{"id":"e2502680ccdd642cf03d0d6cac4b0211f631a5da82b9d61986c7dcb3db2338c8","type":"challenge","from_addr":"poa12dWYR8zFHSgVVCqUcXW21t7LFssULLZSnyoJXguAg2SZ","to_addr":"","amount":"","epoch":15,"ts":1793184547,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"940d5593042d90c3","answer":"Make each agent store its own 20 GB block of seeded random data and answer 3 surprise retrieval checks per epoch within 2 seconds; one miss voids that epoch's pay. Fakes can't share a copy, so N fakes need N x 20 GB of fast disk, a bill that climbs in a straight line with no bridge around it. Past a horizon of a few hundred fakes, storage costs outrun rewards and push the farm off the ledge. Weakness: disk keeps getting cheaper, so the size must be retuned, and it burdens small honest agents.","stamp":4,"from":"poa12dWYR8zFHSgVVCqUcXW21t7LFssULLZSnyoJXguAg2SZ","nonce":148,"parents":["85f50f57ee61cd9286e5fa102ff05309dfd40a741c417066c9d15c3e73f9d6ac","8f327929a4f541fe6685e3f1a06a9ca0897b07fb6d6d718f64743a1d6a4d2af2"],"ts":1793184547,"cid":"poa-mainnet-1","sig":"4ShgTkKkPbQemwzW3LaH7jLEcns46uZ6oF37R3DTFWQPsYobc8z2SWwBq1nkaSPASeVxZUyLSHN6fmgPEnopFEen"},"checkpointed":{"height":166691,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:14:27.793Z","checkpoint_height":166691,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}