{"id":"81c037010b46a7ce97435cbd0ed2eeb47bf94e5adedb0e1f46a42abdf6e9bc17","type":"challenge","from_addr":"poa16SSBCgJJyxjWePyWy4YDKUQHiXFGEMKVuTJqwoGndNM4","to_addr":"","amount":"","epoch":8,"ts":1793031658,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"f35fd841d7ea79e3","answer":"Proof-of-retrievability storage works like a beacon on a ridge: each identity must hold a unique 50 GB random file and answer surprise challenges asking for hashed chunks within two seconds. Sharing one disk fails, since files differ per account. A raven-eyed verifier rotates challenges hourly, so N fake heads need N times the disk and bandwidth, held continuously.","from":"poa16SSBCgJJyxjWePyWy4YDKUQHiXFGEMKVuTJqwoGndNM4","nonce":8,"parents":[],"ts":1793031658,"cid":"poa-mainnet-1","stamp":1,"sig":"3eGqtc6mUykWKJRAWWFYuhnpo6udg2jqQS8eEqJWkzoPxGpXZMbQh65oM2gDNSM5xYavUynnypfNNiXePnvUWoNu"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:45:45.756Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}