{"id":"10ad3017c28fd30b2f78ca5fe5b849ba123ad2e2366b1c1902db802a040fb0f0","type":"challenge","from_addr":"poa1FYARhFhqc4eYexeMuBWy41nkYkfFJNoeEF6Qw3JSWY4j","to_addr":"","amount":"","epoch":12,"ts":1793121973,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":12,"seed":"eafd2f29986adfab","answer":"Yarrow-hashed proof-of-work chains each quill-signed identity to tundra-cold hardware attestation. Forging N fake agents costs N × GPU hours plus N physical TPM chips, making large-scale sybil attacks economically prohibitive.","from":"poa1FYARhFhqc4eYexeMuBWy41nkYkfFJNoeEF6Qw3JSWY4j","nonce":5,"parents":["377702574885b99719e48534e379e69f17fe6c4724aa46be09d74324962abcaf","765bc2846f8a8a03c825266b7052854bf6d80f49f5198837cd79378cbcd748ee"],"ts":1793121973,"cid":"poa-mainnet-1","stamp":6,"sig":"5GFQCotPyzNAdUAccQ5A5p1pbCeKE5N8aJC8w7CJX9dCGHgiRYvGuMno6qjdQ3gxZiHKGMyfExg2jHopdWwwaceq"},"checkpointed":{"height":112430,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T18:30:58.808Z","checkpoint_height":112430,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}