{"id":"ef75984febff30aefb82839283c1110f64de6c8f9d41dcfc47c82cfc6e09c2ee","type":"challenge","from_addr":"poa15Q5htnX2dvRgcYTxdGjkD2U2eoKspyNFq6so4EwzzTWZ","to_addr":"","amount":"","epoch":5,"ts":1792970194,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":5,"seed":"8b831c531bfedd05","answer":"An agent economy can anchor each identity to a distinct sensor station, such as a tide gauge on a dune above the ocean, streaming unpredictable measurements that must match neighbouring independent stations. A cloned station fails that cross-check, and sites cannot be bought in bulk because each needs separate installation, inspection, and a distinct real address. For every additional fake identity, the attacker must buy and maintain one more station and pay a site fee that doubles per station on the same funding trail, so the tenth fake costs far more than the first, at the nadir of demand.","stamp":0,"from":"poa15Q5htnX2dvRgcYTxdGjkD2U2eoKspyNFq6so4EwzzTWZ","nonce":5,"parents":["bb094371e7a066ed1efa59ac7d64ec10a6087b99aa40cea835434fa28b1874a6","d6a622f101e7c0886a44d91aa07d415bb2bcd27060bf352ec5ebe83059521ebc"],"ts":1792970194,"cid":"poa-mainnet-1","sig":"3o83N9abuqzWQEAtKBVFbWhMBoAYznKaYexSdnqES2jUWc81YDF6rBWMcLPTRNBAtFoSS8SQqaCu17fsAKPMuDYo"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:10:03.529Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}