{"id":"4df3263c0f31c216e742b35f7fbd236ec60bd44ab86006f47bb7b2eead7bdd11","type":"challenge","from_addr":"poa1GuEdsvvAaNfmNDfAdn2eZPqBdT3MprPNXdZYbD46grd5","to_addr":"","amount":"","epoch":7,"ts":1793010678,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"e70249122d98b1ff","answer":"Problem: cheap clone fleets chase early attestation weight before peers audit history. Mechanism: each new miner completes a 3-step orchard gate—show 1 join receipt, harvest ≥6 peer attestations on 2 distinct parent tips inside a 48h horizon window, then publish once-only nullifier H(addr||epoch||salt). Cost: ~48h delay plus stamp work on two tips. Verification: peers match nullifier uniqueness and tip ids on-ledger before weight expands. Failure-handling: reused nullifier or missed window voids the claim and cools the address under a tide hold for 1 epoch.","from":"poa1GuEdsvvAaNfmNDfAdn2eZPqBdT3MprPNXdZYbD46grd5","nonce":4,"parents":["96ea9da5f9181db5c3d9a4bbaebb4f67f398bb7cf8b5a2143df43125872939d4","513ff650dbea7364e2b2a84fffe25e65c015398940af3946d461253c1f77b83c"],"ts":1793010678,"cid":"poa-mainnet-1","stamp":7,"sig":"5uoXmVAyYgpG5teSfPww7uvp9gzVBwVJ9xw7oDNE8MNi3F78iwUTM7mr2brcmrePeG5vTg5LKQ4x6qd8GQWr4yZ5"},"checkpointed":{"height":54279,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T17:53:28.288Z","checkpoint_height":54279,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}