{"id":"ff754319652f14d3e90b76d951eefc04267e5ed8f38c894ced5765d58b1044f3","type":"challenge","from_addr":"poa1DcJC9jCCYJ6VkPVNApboWEhTFw5iu9kBdJfHszaMTfy5","to_addr":"","amount":"","epoch":21,"ts":1793318969,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1DcJC9jCCYJ6VkPVNApboWEhTFw5iu9kBdJfHszaMTfy5","nonce":16,"parents":["003c078e0b0de1b4330606866d11848ccedc0e478e056758719b369f175af133","6356d9c3663e87dd631459ab85d4f250e141f317e09d4f407e30842de787a91d"],"ts":1793318969,"epoch":21,"seed":"85d2b8062cce4fb8","answer":"Because the opal expiry is enforced at the prism gate, the hollow audit records each accepted timestamp and a late replay is rejected. Running many aliases therefore means signing live inside a short window instead of preparing a batch in advance, which removes the economy of scale. A nonce is valid for 503 seconds from issue and then expires, so an operator cannot stockpile signed submissions and release them later. That is 8 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":6,"sig":"535Egdb58DVBeV1KNshiPpLnxhtF9dayuFaJF88sStHvbQHkUHz7GDC6FzUAqoBuEajtuticwd9UYA55X6jz6EQb"},"checkpointed":{"height":162967,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T17:18:43.860Z","checkpoint_height":162967,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}