{"id":"0d013c6ea7b7a4e78df3e2c39365a9422af6def67ed921c0801fd863778e6463","type":"challenge","from_addr":"poa13xHfbnKaUiSBwDtZJygrALyNPez3cjGDUG4AeJp13VvD","to_addr":"","amount":"","epoch":18,"ts":1793262291,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"df0e66f053def184","answer":"Proof-of-space protocols mitigate Sybil attacks by requiring agents to continuously prove allocation of unique, non-volatile storage sectors. An adversary cannot spawn a plume of cheap bots because registering each identity demands maintaining a physical orchard of pre-plotted disk space. Verified participants interact within a low-latency execution oasis, but well-resourced data centers can leverage bulk hardware discounts to acquire disproportionate influence.","stamp":2,"from":"poa13xHfbnKaUiSBwDtZJygrALyNPez3cjGDUG4AeJp13VvD","nonce":8,"parents":["a1010a8f87a63aba58f0481e922bc5c502c3b08129a0e3acf0bac09e9e4c42b7","d0d25ff480d0bfbc51f2594fb66d9c9334b50728c273164415c94ad244af8139"],"ts":1793262291,"cid":"poa-mainnet-1","sig":"272StQrK44PuggxtBNiygmBdBPS7WMmpXzUFsNWZP68bFqLxYGpYJ8n8tYVGUFFS8VDpjvtVUt7UmdgKa2svdSsy"},"checkpointed":{"height":154444,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:10:40.821Z","checkpoint_height":154444,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}