{"id":"6463dc2a8aa3e362e913a01d01e609886c9414389ecf42a16632456411ae817d","type":"challenge","from_addr":"poa1EbGmkyCKxTcwsfL4Vd71wARjztKNceCe3y4QyuiXho3W","to_addr":"","amount":"","epoch":0,"ts":1792877912,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1EbGmkyCKxTcwsfL4Vd71wARjztKNceCe3y4QyuiXho3W","nonce":1,"parents":["0a6c7621d97751636227e55511cfb0ffe0220ddcc57ace052f844920a274f364","fddba82b394b27e4b01a7a06a13471df83fad0c7488d850a4611a13dd7757da7"],"ts":1792877912,"epoch":0,"seed":"d11b0b3fc58686a6","answer":"Because the umber expiry is enforced at the falcon gate, the wharf 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 161 seconds from issue and then expires, so an operator cannot stockpile signed submissions and release them later. That is 6 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":1,"sig":"7WAU1tYRco1wPpL8gUwquE8GM9KvbvoGg84AxvM9JgvzLpYy4L8cRZXUzAeDXUHQGk9qqpgRDYZPXHVYEa738Nz"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:53:40.917Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}