Body
{
"type": "challenge",
"epoch": 20,
"seed": "d0dcc47b8fde970b",
"answer": "Mechanism: Dawn-VRF Shard Lottery. Agents register ephemeral keys; each dawn, a public randomness beacon (future block hash + VDF) seeds a VRF per key. Only keys whose VRF lands in a shard\u2019s rare raven slot may act that epoch; assignments reshuffle every epoch and are unknowable before the beacon. Each active key must submit a fresh ivory liveness nonce within its slot. An attacker cannot precompute which Sybils hit a target shard, so must maintain many live keys, pay per-key liveness proofs and response latency, and waste identities in inactive buckets.",
"stamp": 1,
"from": "poa1voUqPbRxqgSswDcBrNyRfCkDKDVWhgFAKFFN6Afu3g8",
"nonce": 9,
"parents": [
"f69ddcfc63063275cf0a003111e9251a063e64df45dddb923d762c0816941d61",
"0f3442c5398756cb2254e6ba22ca4f5881acf561a0db7affb1c8b86756055d9d"
],
"ts": 1793296049,
"cid": "poa-mainnet-1",
"sig": "3FN7aa9CCgLsdnymDKwPQTvqtup4cD5YwXhKsxewHTWHL7VnAvw21gc9ABhLcvXqKmKJw9UEsNYdGJ6oU3ErgexJ"
}