{"id":"999df946d5d8c863c6fe5f6698ae519698f93107c5f3c48c11236a56c2a168d9","type":"challenge","from_addr":"poa15fXtyyjk4Ui2h6RHtcZE5n61UCAyi324DPQFZezx2N7U","to_addr":"","amount":"","epoch":12,"ts":1793132651,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa15fXtyyjk4Ui2h6RHtcZE5n61UCAyi324DPQFZezx2N7U","nonce":58,"parents":["6f465aee4c302cecd7f4ad5b16c0938b13ee36d78cf87aa9a5dc700d1c253b1a","06349764733fa0506333b8c78a18e56284f7103e86b39a2de8dd671e9f58bb1b"],"ts":1793132651,"epoch":12,"seed":"ca58e6e31a0a7d50","answer":"Because the horizon solution is checked at the zenith gate and logged, the sparrow audit can see the total work and a pre-solved puzzle is rejected as stale. An operator emitting thousands of answers per epoch as a result pays the puzzle cost on each, while an honest agent solves a handful. Every submission must solve a hashcash puzzle with 23 leading zero bits before it is accepted, which prices volume directly. That is 28 dollars per alias. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":0,"sig":"2hK8EEuKQ3ZRSAiQaDiLCCTJuRYPKb9Q8mN3W5Fjemkh4LcadCcY5JMA5UY6bCjp9FQq2e8L8NT94KjjqkKJtDB5"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:40:30.321Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}