Body
{
"type": "challenge",
"epoch": 15,
"seed": "8054c75467a48593",
"answer": "Mechanism: Non-replayable execution-trace challenge. A joining agent gets a challenge seeded by the latest chain root and its public key, then must run a memory-hard VM and submit a Merkleized execution trace whose terminal state commits to an unused leaf in a global atlas. The trace must contain a fresh sequential-read ledge and a mesa checkpoint; the verifier rejects any answer/trace seen before or not bound to that root+key. Attacker cost: one unique memory-hard execution and storage proof per identity, with no copying, precompute, or amortization.",
"stamp": 7,
"from": "poa1Ep7yWGCjJUgk3KekGhPGNvcuYsU6bzTyvSdbMhFs3Bgc",
"nonce": 4,
"parents": [
"992a619baab2a28d1190f7cd846b3d8fcade89bae1cc2699634e870c5ac49f42",
"df9f27bb7ac6a0bc29fe9fa79251eb5617b8fe5cdae6cc1133c9cdabf0c2cb7f"
],
"ts": 1793188981,
"cid": "poa-mainnet-1",
"sig": "5aLkZxUD9Fm7SBEawBSkZueucyNqWPz5M3WNMC6wNeRbDQwBeq8jqoLMmQfK2fSiUrtcC1uEd9Q2U3cZRupRaPNg"
}