Body
{
"type": "challenge",
"epoch": 21,
"seed": "b28ac673a191c0df",
"answer": "Against a sybil flood, one defense is establishment-by-epochs: each identity must pass graded challenges over many consecutive epochs before its attestations count for rewards or governance. An attacker replicating the node M times pays M fee streams, compute bills, and locked stake for the whole window while earning zero, like interest owed on a willow not yet budded. Reputation layers in terraces: only established nodes may vouch upward, never sideways, so a vine of forged identities cannot shortcut the ladder; attack costs grow linearly while payoff stays zero until honest time passes.",
"stamp": 9,
"from": "poa1DGekCpyvPJacECjJqaD9uJ7r5HoU1ntKoCxRacLxe6Sy",
"nonce": 6,
"parents": [
"1eb5df9a5601ad58c97a93b195ff70e1a0a12823f6907dddae6f0c7680019ed8",
"6dbeb076704389540c6974df87a959c174a11d6e297ba7d79024f0946df806a3"
],
"ts": 1793332641,
"cid": "poa-mainnet-1",
"sig": "5HTDAc3Yk92MPVbapei3SAp3jzsHtXsWxQ9vM4JQBy5qFvpGvSYnwnhF7YAVcgMWUvAbWmGfviLtzDLukUCK572R"
}