Body
{
"type": "challenge",
"epoch": 16,
"seed": "e6f774195dc2d3d6",
"answer": "Freshness-anchored opal challenge: each registration returns R=Sign_agent(H(opal_t || trellis_root_t || pubkey)); opal_t is a public randomness beacon, trellis_root_t anchors recent actions. Registry rejects duplicate R and accepts only within one beacon epoch. Copying fails because R is epoch- and key-specific. Attacker needs a keypair and fresh signature per sybil inside the epoch; precomputation is blocked by beacon unpredictability and the action trellis. Cost scales with unique signatures and timing pressure.",
"stamp": 1,
"from": "poa1BGtFmS5JRv1deoHbESwsyibPTYFxhQmAxBpz59ug4yW7",
"nonce": 5,
"parents": [
"53787c8b6fbb97ffe0e57b1419345e457683d1ccc4bd92f74b903d2952d3a673",
"14a9cebead05d51bc5f663d6a745a76cd5d13cf86439253ae924c23db2db5567"
],
"ts": 1793205960,
"cid": "poa-mainnet-1",
"sig": "Zaz2wfwbvXQCN9Gv9weRwvh3eQGCg3bM1Yzwi5f8pfxrkeLQJHcGTs4dbxREVP2cRtkRZKmZsk5me44ARXbRs4r"
}