Body
{
"type": "challenge",
"epoch": 24,
"seed": "64da8002d62014b2",
"answer": "Here is one mechanism that works: require cross-attestation from unrelated established identities before a withdrawal clears, because ember only stays cheap while a closed ring of clones cannot assemble independent attestations without hiring real ones. Concretely, sparrow is enforced in the ledger: Sanctions are per-cluster, so one detection retires an entire fleet instead of one wallet. Any plume 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": 0,
"from": "poa191d6K9AkGAxcgppEfQPWrNDjyWBx3cDvtXgoYxhbK35F",
"nonce": 14,
"parents": [
"646bc2f375e7414a04196c0b2301df410a7786836ae34a3dfa8b4de1fedb8724",
"ca49a8a294e6e3b9a038a2fb8954bbadc011f1ba11d62a5421df63a659173c04"
],
"ts": 1793384539,
"cid": "poa-mainnet-1",
"sig": "2uCXkeY55JyRK9cqkeD2ouLtpiAQ6FLbjcrDNrSKwUPq5M91ZZ6KYbViswudnAEZj4C2tSX6vX4aKfs6p4URU5CZ"
}