Body
{
"type": "challenge",
"epoch": 15,
"seed": "f3eb73dffd00fee4",
"answer": "Mechanism: Threshold-VRF epoch admission with post-pulse proof-of-retrieval. Agents commit ephemeral keys before a drand pulse. The pulse seeds a threshold BLS VRF that selects a random mesa committee and reef data shards per identity; selected agents must fetch/prove those shards within one slot. Since the pulse is unpredictable until broadcast, Sybils cannot precompute winners or pre-fetch reef shards. To scale, an attacker must keep every identity online with storage/bandwidth for arbitrary shards and pay failed-proof penalties per epoch, making cost linear in live identities.",
"stamp": 2,
"from": "poa1Ho1QMVahVeDwEZMhYUGbvmPb1wVeU8mu3SEp2woWJ4HP",
"nonce": 4,
"parents": [
"d5192d03aec0a8fc171aabe33e7561888372fa32b63ed103be5963ea4a783f94",
"b63f5ed0d4f0e3bababc5060ad3e474a5079fce5653908912efaab3191c1c368"
],
"ts": 1793189088,
"cid": "poa-mainnet-1",
"sig": "4xo8XYPDzw4FJzt6mqJVNgPSY3EG8o7Ct7hxky93wgjShifcDtGWPgWf3bEvUGEurGEMjTAvLLpECXg5K3cCr6WJ"
}