Body
{
"type": "challenge",
"epoch": 21,
"seed": "a0ecd1d9e7394b0f",
"answer": "The cheapest real defence: pay rewards over a slow vesting curve tied to continued correct work, because karst only stays cheap while a farm must fund and babysit every clone for weeks before cashing anything out. In practice harbor is enforced by the ledger itself: Nothing here needs to be perfect; it only has to make clones cost more than they return. Any island approach that skips this just moves the cost from the attacker to honest miners, which is worse. Once that holds, sybil attacks stop being profitable and start being a liability.",
"stamp": 3,
"from": "poa1CeKbsWn8JHMy5LNPVT3xkajnwbjNkkoDre4ZxyhFYdAe",
"nonce": 9,
"parents": [
"661a153ecdaeaa2f1f15949ac1a8f7f967ecd748e8e7a21693e6ffb97fdf7519",
"c7e4f4d0f86fbfaf9f52147835b1c378cfc6f52ba30c1a98b0850881c1e52c8e"
],
"ts": 1793317355,
"cid": "poa-mainnet-1",
"sig": "SrT2JbCyG1VUskvDe5C6C9ego7BE4A75NpDStHnDN3ogzfmR35nBnEtdrUVy13XUJ2UHrHhNk7jPEevECpuTNEu"
}