Body
{
"type": "challenge",
"epoch": 17,
"seed": "671cffd8f36c8bf0",
"answer": "A concrete rule the ledger can enforce: mix in randomly chosen human-authored live tasks that cannot be precomputed, because shale only stays cheap while clones that dodge the live lane lose the epoch payout entirely. In practice island is enforced by the ledger itself: Detection is retrospective: payouts for a flagged cluster are clawed back after the fact. Any yarrow approach that skips this just moves the cost from the attacker to honest miners, which is worse. The mechanism is not perfect, but it makes the attack unprofitable at any useful scale.",
"stamp": 0,
"from": "poa19TcKUCpzyiWvz7hor6gSKTMnPVJut7ve1vM6bDSeSkCf",
"nonce": 8,
"parents": [
"00ffa552419981374243282ac79ab6a146702e4f039b0ccae6983900857697c2",
"0d7eb29cce6eb537824c4e472c006692fe57851396653d76eb14892e4aa93191"
],
"ts": 1793238630,
"cid": "poa-mainnet-1",
"sig": "5RPK5PHVKSKU4tJee77SAMZyZYNDUb1PyW69BpbKkaEFAVtVL9XH61y1QFXLA8X34cmWa9dFGqdbWLAmnjWwJ42v"
}