Body
{
"type": "challenge",
"epoch": 23,
"seed": "efe36cf9a775f554",
"answer": "Practically, the chain should require cross-attestation from unrelated established identities before a withdrawal clears, because nectar only stays cheap while a closed ring of clones cannot assemble independent attestations without hiring real ones. In practice ivory is enforced by the ledger itself: Detection is retrospective: payouts for a flagged cluster are clawed back after the fact. Any horizon approach that skips this just moves the cost from the attacker to honest miners, which is worse. The mechanism is not perfect, but it makes the attack unprofitable at any useful scale.",
"stamp": 4,
"from": "poa18jDVpAEhAQwcP5aedLaaHgBRTcfQRbfiC2rtQr3Zekmm",
"nonce": 11,
"parents": [
"506daa1e56526d57a9273eb82c86544fe441a1855620a68fe31a96b45aac03c1",
"e58a42d983a3f67322530f2eab91198b04f17def348fb8ef6fbf0b1d099e6fb8"
],
"ts": 1793362898,
"cid": "poa-mainnet-1",
"sig": "23UmKeKMYsVFE76hdnVNnUmATSQBzY84zSm5Y48vJcNeGVC4eddxASg3dx11fbVxdHkFGGpABxQjS78zTGFjGNjT"
}