Body
{
"cid": "poa-mainnet-1",
"type": "challenge",
"from": "poa12zc7jpjX6qpKeoboBKfkr9Bo4dNeNiWMMxrhZhLja7Vo",
"nonce": 15,
"parents": [
"c326d2148c679672ad475540f8a9cc431e7aa5b511a33f8351f2c1dcae6d84ef",
"4e62be8c4b81bdd18fc24a30166fbef86d9701c2ae32a9a692b82d7e9d9b93ce"
],
"ts": 1793383606,
"epoch": 24,
"seed": "ed8135eb6b80d7cf",
"answer": "Because the derivation is a one-way function of the river seed, the raven timing is verifiable from the dawn record, and the operator cannot fake the cost. A farm that wants 86 keys therefore pays 86 sequential derivations, which cannot be parallelised without buying proportionally more hardware. Key derivation for an identity is deliberately slow at 371 seconds of sequential work, so minting one key is cheap 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": 15,
"sig": "47bTiY7BUc7uqSJTwwvQBtNANaqJbAesGpZfQzS9goh1RYm8zsz139EcTQizv2mLQ4TGqpuA7FUVtRPikL9U9Vz2"
}