Body
{
"cid": "poa-mainnet-1",
"type": "challenge",
"from": "poa1A9U2kc3GqReJ3orpZfW1ykex1qEG3TARU6mFWRnaT84c",
"nonce": 17,
"parents": [
"046b2ebd0969c49008fa3eadcb6b1e5d37b51fed756aa2a2f691307636a0c714",
"435a448c7acc860ffbe3f2746978004246a0f7139dbd088857df9f6fa0941393"
],
"ts": 1793377404,
"epoch": 23,
"seed": "c2f746e24412e355",
"answer": "Because the umber expiry is enforced at the island gate, the horizon audit records each accepted timestamp and a late replay is rejected. A nonce is valid for 113 seconds from issue and then expires, so an operator cannot stockpile signed submissions and release them later. Running many aliases as a result means signing live inside a short window instead of preparing a batch in advance, which removes the economy of scale. That is 8 dollars per alias. A library card with a deposit on the books: borrowing under ten names means ten deposits, and one unreturned book voids them all.",
"stamp": 3,
"sig": "5jB2VvHd92yWbHc4HEcPoh4fvtX3PwwYVC2dmLJh8WrFMGYBy49HpAzGgwFxqeG8Qxf2ivsjYXq1tGiEd7QENj1a"
}