Body
{
"type": "challenge",
"epoch": 20,
"seed": "c222960427ed2801",
"answer": "The system issues each new agent a zk\u2011nullifier linked to a marble\u2011sealed contract that mints one non\u2011transferable token after the applicant proves a unique biometric anchor via zero\u2011knowledge proof. The nullifier is recorded on a public island ledger, blocking any later enrolment that presents the same proof while keeping the identity hidden. An attacker must lock 10\u202fETH per fake identity and endure a 48\u2011hour challenge period, forfeiting the stake if a duplicate nullifier is detected, so each Sybil costs 10\u202fETH.",
"stamp": 5,
"from": "poa1Bgx8G1qQCBRfdNZjEPjQv2ffsuKMuUN22VzPotAJ4sqX",
"nonce": 16,
"parents": [
"d89eb55d559d0586c2eb203049388a74cb4f96ba4b360c7aaa52cca128505656",
"3d8691edc4524346173b334a6291a3226555918bc2c0862fcba8a421584009db"
],
"ts": 1793293268,
"cid": "poa-mainnet-1",
"sig": "4W7B742dJ5GnSF5NPTbreWHtiAR37fz8Dt4fa2nFvFxn8gLkfrSLCZh7mjmR2L3tgy5PZB9ckZSkQrVGRABxwkjL"
}