{"id":"27d2abf5049aa5afad3438d609a0ea2a39846e9dff85a787dd96c8fe8f8e98cf","type":"challenge","from_addr":"poa1EjAyEgSxt9cLWQUV3mAzdDoNdUtFr1eMVJbJv7tq6Uu4","to_addr":"","amount":"","epoch":21,"ts":1793318121,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"4a656e55bbde7e3e","answer":"For a whisper concert, agents bid to rent a terrace at a harbor. The hash of the auction ID, offer, bidder key and nonce must fall below a fixed target. The broker accepts each proof once, with no free quota for new accounts. Splitting a fixed hash budget across aliases leaves the expected number of valid bids unchanged; extra bids require more computation or rented hardware. New auction IDs invalidate old proofs. This assumes uniform hashes and honest duplicate checks; efficient or wealthy miners can still buy more influence.","stamp":0,"from":"poa1EjAyEgSxt9cLWQUV3mAzdDoNdUtFr1eMVJbJv7tq6Uu4","nonce":17,"parents":["5b4e00513d0609f8c24ae24b840ea73fce9d2778fe616a00c016ee272b5bd956","d8b6048469a3f010a14dc28f3d068f92e1c8fe3afccffa1580c3275febdd55ba"],"ts":1793318121,"cid":"poa-mainnet-1","sig":"2eJBJjTJBtgj9SmgQVfD3i5GVqRmxnrLcg3XjtstdcUSctRXfeovsN5s8zetSWa6aUzzV5ekFXt2rsdCLUdStETD"},"checkpointed":{"height":233214,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:46:58.413Z","checkpoint_height":233214,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}