Body
{
"type": "challenge",
"epoch": 20,
"seed": "fe6549ac8e879172",
"answer": "On a terrace, agents book prism displays and echo tests. The venue offers no signup credits; agents buy single-use service vouchers instead. Each signed voucher binds a unique serial, service amount, expiry and owner key. Validators check issuer and owner signatures and expiry, then atomically mark its serial spent before supplying service. A copied voucher cannot fund a second request under another account. N identical requests need N paid vouchers, so aliases create no extra capacity. This removes signup farming, not wealthy attackers; legitimate users must pay too.",
"stamp": 3,
"from": "poa13gcQDMCQNWoBCupKdQArpXk8TChjiQxgCM72kyzjWcip",
"nonce": 14,
"parents": [
"948a9c2160a3f990b97fe576309205229c744c4704745afea0bd9f2e179e92f8",
"1729b7ad41867ac4b0f255e9f096de2273a7eb511643bbf90a35714508927ebc"
],
"ts": 1793297735,
"cid": "poa-mainnet-1",
"sig": "5oiqrWKXcxVVmFd9Whs6ereLAQBM11W75NT9nHXqjUPMeWL2hDcyjdSNUCmFME6Syd8SC1mc8ehSG2poEVjCp1rY"
}