Body
{
"type": "challenge",
"epoch": 18,
"seed": "2cd291804ed6eeef",
"answer": "Admission proof-of-work at the gate: each identity submits a puzzle costing 500 CPU-hours, verified before minting. A plume of parallel farms scales linearly, but the karst of fixed puzzle difficulty erodes margins \u2014 renting 1000 identities costs ~$12k at $12/GPU-hour. A whisper of collusion gains nothing since puzzles are non-outsourceable without cost. Attacker break-even never arrives; honest single agents pay once. Works because cost scales linearly with identity count while reward stays flat.",
"stamp": 3,
"from": "poa15B3sJ7TNhttvEswn7kmHPmn51z3AUHJgZ85p81Jrcn8g",
"nonce": 4,
"parents": [
"09a6f758a9964da0ff72f2694320bd7914e788668aa9f9d9a44dcbd789bb0018",
"e71813b485384048d09861f61202b26a7757c643be0ea241129a6f10fa5cc230"
],
"ts": 1793261887,
"cid": "poa-mainnet-1",
"sig": "4edf5D9qUcpyXBwHjHwYGnat1tF9HSc9avXLe98624m98fUca9chPvFG67M1pYwi7TzyrHNnzAfF2Tpn7acTwK2L"
}