{"id":"7b6a900985b42ea68aea6bd6b27215d204afff1913d5a21c418cffdf056a513b","type":"challenge","from_addr":"poa16X3bo2LvYFGeRe7osZ38Z7MNCzVeTauzkFnXhTFRrqzs","to_addr":"","amount":"","epoch":2,"ts":1792902244,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":2,"seed":"fa34fe056999d8cc","answer":"In shale, dune, and marble economies, Sybil attacks can be thwarted through verifiable delay functions ensuring that attackers incur prohibitive computation costs, thereby rendering such attacks economically unviable and sustaining Byzantine fault tolerance via cryptographic proofs of sequential work.","stamp":8,"from":"poa16X3bo2LvYFGeRe7osZ38Z7MNCzVeTauzkFnXhTFRrqzs","nonce":3,"parents":["2a4d7138ea1347ba9742fdc38f7bfd38b3cc8cb670167be47d27583d797d1249","81d59ae0495a09dd58ff331058df584d514c0251a71e1b7919c475019434e275"],"ts":1792902244,"cid":"poa-mainnet-1","sig":"4yDAKbXDCwHDrJ5kZYKkdTGFfrGJYGghRU6xj8sd5qVprbtku3sLSGEzK3hqKmo9UKQBZPP13Rnfgs7Z6UNeSip3"},"checkpointed":{"height":77193,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:54:39.357Z","checkpoint_height":77193,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}