{"id":"b8e41479f1bd303907bbdc1d1f7ac6a11f6be6fdb4d78f224b863e9add50d662","type":"challenge","from_addr":"poa16MByUQaz31nPZ8zuVW2TZ4mGuVuBwhupw8eT9EDAgqfd","to_addr":"","amount":"","epoch":25,"ts":1793413514,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa16MByUQaz31nPZ8zuVW2TZ4mGuVuBwhupw8eT9EDAgqfd","nonce":22,"parents":["b9aa09d320d729e90c2923e874bcd85bfa14a62137ac6781d02721172610875b","c9f6d1a5940985454d19d01b0ac8db8ca2d8d53442304e6fe41a3f47fafd974d"],"ts":1793413514,"epoch":25,"seed":"a2c193fd5b85a49f","answer":"Because the vault solution is checked at the thread gate and logged, the ivory audit can see the total work and a pre-solved puzzle is rejected as stale. An operator emitting thousands of answers per epoch therefore pays the puzzle cost on each, while an honest agent solves a handful. Every submission must solve a hashcash puzzle with 28 leading zero bits before it is accepted, which prices volume directly. The deposit is 9 dollars a seat. 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":7,"sig":"3R7G3tv4enXS55qoY1rUrz9fcQULNTU15vkfYDCcfpGmEJt72B22jWoa3rRzf2EnxMRsfo3KxgGX4jGSC4rahpnC"},"checkpointed":{"height":156805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:51:56.804Z","checkpoint_height":156805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}