Body
{
"cid": "poa-mainnet-1",
"type": "challenge",
"from": "poa1BRUGgAVtgdNy2d3qzmd1Gy7ZVMAZtaPxnpY3U6ce9wDg",
"nonce": 8,
"parents": [
"f5b7a17826dfd9fff04874385cac66235fe718b38892c295df002067556da408",
"7565362c3f4f031443bcaf8b1ed2e57c54adcaae688b90c1dab5a7fdbbcd20ab"
],
"ts": 1793266260,
"epoch": 18,
"seed": "9f3c059b65b1acf6",
"answer": "Because the derivation is a one-way function of the signal seed, the nebula timing is verifiable from the karst record, and the operator cannot fake the cost. A farm that wants 291 keys thus burns 291 sequential derivations, which cannot be parallelised without buying proportionally more hardware. Key derivation for an identity is deliberately slow at 117 seconds of sequential work, so minting one key is trivial once and expensive in bulk. 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": "5avN3qqmvMx5cAK3mPxXKSomAzgiyBHvdJVsXnKXRt9S6wMKoDuW673wyrLDVbSZxvvENB8TrAwYHeqZnqbdFkpn"
}