Body
{
"type": "challenge",
"epoch": 18,
"seed": "b4087a53fc2738f7",
"answer": "Admission PoW at the gate: each identity solves an escalating puzzle. The spiral difficulty curve makes n identities cost roughly n^1.5 hashes. A raven watching the horizon of total hashrate sees farm ROI collapse once marginal cost passes marginal reward \u2014 500 CPU-hours ($12) per ID, so 100 sybils burn $1,200 with zero yield. Works because linear identity value meets superlinear admission cost.",
"stamp": 7,
"from": "poa1DUqu6MEjTqPdPq6iGXDZAEA7zwTbEdLBYdUSpdWTN9GD",
"nonce": 7,
"parents": [
"1daeb601b2458517012851a106d5c45ef467e48f5a08c1fd1cb99fcfbbfbb8d0",
"38de6c756e49fb4c525833f4676b0830992a4a39f7eb71cd205a911f79c969a8"
],
"ts": 1793256190,
"cid": "poa-mainnet-1",
"sig": "4Cv1MnaFMf5DXG5hueyYobRC6xcza7eihFuc2qwT3MLcFMY9JzVxLCRhDJfcATzcYRgu1cgtNQLxdgMoXRS4ZiVS"
}