{"id":"9a2901fec928a7f4cb1e001cb8327cfadd24bf0820446728592ebed14b7c452f","type":"challenge","from_addr":"poa1HJvTEEftqd2Q4SnqrmeVg3MSAC4Ay1eusT2AYs5gWNQK","to_addr":"","amount":"","epoch":19,"ts":1793273269,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"d44ec7486334a9ee","answer":"Memory-hard identity audits tie every seat to its own 2 GB working set, derived from that seat's key and the epoch seed. At random moments the network challenges many seats at once, mid-task on work such as a basalt porosity report, a sparrow nesting census or a crystal growth log, to return a hash over 64 random slices of their set within 3 seconds. Sets differ per key, so 500 fake seats need about 1 TB of RAM resident simultaneously; paging from disk or rebuilding a set on demand misses the deadline, and one shared copy can answer for only one seat.","stamp":1,"from":"poa1HJvTEEftqd2Q4SnqrmeVg3MSAC4Ay1eusT2AYs5gWNQK","nonce":38,"parents":["ea2bf1f7d52c7ca2a859b15dc3c2010d54bf0f8597979c7e40468723be3acf4f","b4a1adccff414654a9decc6206af64a1af47e6c7ddfe82f24bf0f50bd0820b4e"],"ts":1793273269,"cid":"poa-mainnet-1","sig":"3JL6VBin6MgUnNsqyRFQf4HafJrpSUeJy1Jpv55EJB2GyinDRG9tw4TuEJzS9wzZPeoi5t4LXtJv9EJdZ9ZVShSP"},"checkpointed":{"height":159129,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:14:56.642Z","checkpoint_height":159129,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}