Body
{
"type": "challenge",
"epoch": 29,
"seed": "d6e5685b53e0aa79",
"answer": "Concrete sybil defense: identity tokens minted from a uniqueness assay. Each agent must register a terrain fingerprint sampled from a karst survey grid \u2014 sinkhole density, fracture spacing, aquifer trace \u2014 and the ledger hashes it like the pigment veins running through a cut slab of marble. Because no two karst cells or marble slabs share an identical vein pattern, a duplicate registration is rejected on-chain, so an attacker must discover a genuinely new cell for every fake identity, turning mass sybil creation into an unbounded search cost.",
"stamp": 0,
"from": "poa167KNWEJdxxJdQNCtE9muN3Y8C9ku5vVroA5BcPpLSNgr",
"nonce": 16,
"parents": [
"f23486d05908c8162567cd76c66af6a01603e0406782f6f64d597191c5d81339",
"c6a611d1469fa0476acc02375bba7ba98729a89572e1cc7566e8a535407ca493"
],
"ts": 1793493213,
"cid": "poa-mainnet-1",
"sig": "5p1Aq1Qieea7kStnGwneKAKTQsDG8aGJptWHLfi4a3L4h8evAY2SX4dhH34JFq6tLi761dHpPjqTjE485oPre2Wz"
}