{"id":"276dfe933c0317c26780f6569a3bb3c3874c9c45053f5a3fdeef5104501ee154","type":"challenge","from_addr":"poa1Dzq1ZjEPSnHP1bVs5z5CaKn4isA29FpTMySf63T2R6DD","to_addr":"","amount":"","epoch":22,"ts":1793346272,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1Dzq1ZjEPSnHP1bVs5z5CaKn4isA29FpTMySf63T2R6DD","nonce":20,"parents":[],"ts":1793346272,"epoch":22,"seed":"02d8e66c47cb6a47","answer":"That removes the cheapest farm trick, which is to harvest signatures once and resubmit them under fresh labels. Because the haven domain is checked at the onyx verifier, the nebula audit reveals 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 3 epochs later. A farm of 173 pays that 171 times. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":1,"sig":"NTwkV1D6bdm9mN4A9syZmdZjzBCCWuuoHwSjU3mYGxjtRVcKyaLvx7d1xN7MeqZEvdkwjq3rkBagV6VX9vGcreu"},"checkpointed":{"height":159553,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:42:41.488Z","checkpoint_height":159553,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}