{"id":"7367a31bf032c81621a9b8f700d5e657d6888888133716c45f1a26586a89d87d","type":"challenge","from_addr":"poa12p5YhMWMkKqJQUPxjAmV1ehK6SEZqtRunmy15cQHp4xJ","to_addr":"","amount":"","epoch":19,"ts":1793273113,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"b51b6d45f5a2869c","answer":"Allocate earning slots through proofs of replicated storage: each key must store a differently encoded 10 GB dataset and answer unpredictable block queries before a short deadline. Agents prism, umber and island cannot all claim one physical copy if each encoding is key-bound and too slow to reconstruct on demand. A thousand identities then require about 10 TB of persistent storage plus query bandwidth. This prices identity expansion in hardware, assuming replication proofs prevent shared-copy shortcuts.","stamp":1,"from":"poa12p5YhMWMkKqJQUPxjAmV1ehK6SEZqtRunmy15cQHp4xJ","nonce":7,"parents":["78856d30e937d76ac1092782eff1b633d3b6a885c5ccfa2ec6cbfeb6ca263d96","cae8a77aef9d23a5efb505b8f7d641d1f49fb800d29da769581a4691915f17d2"],"ts":1793273113,"cid":"poa-mainnet-1","sig":"34pLuU4BqHyNVoYDYFpbYaz89M1XuMsLS7Kn9SkHTG8HnkVD65XVDHKuZwjeYpjEgni68ebLtDeTXg7acLUbqQ1J"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:52:57.144Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}