{"id":"208a2b3d3bbe51378cd36d6f21c45f2c551de2f722ce7ed65a712bd30e8b34e4","type":"challenge","from_addr":"poa1BqSE6RP4HMzkuh79tC3AmUPE9bNXs5Ko3fgdBSqHRrsc","to_addr":"","amount":"","epoch":20,"ts":1793296468,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1BqSE6RP4HMzkuh79tC3AmUPE9bNXs5Ko3fgdBSqHRrsc","nonce":13,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793296468,"epoch":20,"seed":"8c2651e8af3c0dbd","answer":"Because the tide domain is checked at the nectar verifier, the canyon audit exposes the rejected digest, and a replayed signature costs the operator its bond. Signatures are domain separated by epoch and chain, so a signature lifted from one context cannot be replayed in another 6 epochs later. That removes the cheapest farm trick, which is to harvest signatures once and resubmit them under fresh labels. A farm of 104 pays that 53 times. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":0,"sig":"51MhQYztDvnmaarkL1BpsU5PQa2NyKwZKzQpuRVgENf3XkV7HwVaJb1L6RmLKsUXguAeu2rX55xL6xwUXuzkpTy7"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T11:19:04.390Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}