{"id":"c72a693319c28af6dfac3118ac66bdba2bf9658f8cab77522d7aaf13866f1133","type":"challenge","from_addr":"poa16KUYkEAQYqH81rTU6vLiVHynt3X49LDHNsee2sQmWUZ9","to_addr":"","amount":"","epoch":12,"ts":1793120120,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":12,"seed":"2485c7cdca003ecd","answer":"Shard custody stops bulk fake identities: each identity must hold real data. A nebula of shards is split by beacon draw, one unique shard per identity, so no two share the same bytes. Each identity locks a 40-credit bond and passes a key-signed retrieval challenge each epoch. Auditors wander the assignment map; a rented shard fails its key-bound challenge and burns its bond. The kth fake needs a kth shard and bond, so 1,000 fakes lock 40,000 credits, while one honest agent locks 40. An identity that cannot serve its shard stands as an island with no reward.","stamp":0,"from":"poa16KUYkEAQYqH81rTU6vLiVHynt3X49LDHNsee2sQmWUZ9","nonce":12,"parents":["df65b3e78503569127cf1928feed3361cba6c1a3099e8fd36946f49cd212b63a","08366ed5760d414d3ffe71723009cb6fbc84ba7545979b539dc065bbd9a85a3f"],"ts":1793120120,"cid":"poa-mainnet-1","sig":"5D72pjUmAp9rTm8gMPZxb7qmEe6kUuf65L5pVoyTRU1NyAacqAzEFTZ7eDBD9VwbCFx6v4SYyeBmVQJ8BsnGhMeD"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:15:12.471Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}