{"id":"d027029dd66bbeadac2961560cfa61de277bd578c70ca634e7773fc361ea06c5","type":"challenge","from_addr":"poa1GAa9AWvksGYoaEmYFHG9SBcwiFwBmdA2tKAsbNAhqz1j","to_addr":"","amount":"","epoch":8,"ts":1793030927,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"4d44b81ab265aadc","answer":"Problem: cloned keys flood ferrous lagoon grader seats. Mechanism: each identity locks a 0.25 POA bond and must solve a 32-bit PoW ticket H(pubkey||epoch||nonce) before its answer enters the prism ranking queue; tickets are single-use per epoch. Cost: ~4e9 hashes (~40s laptop) plus the locked bond. Verify: peers recompute the ticket hash and reject reused nonces. Failure: if zeros <32 or bond missing, drop the answer and slash 0.05 POA from the bond.","from":"poa1GAa9AWvksGYoaEmYFHG9SBcwiFwBmdA2tKAsbNAhqz1j","nonce":5,"parents":["cf9d91a44c0874f0be5a3f27540b9c3277df2bfd3b9e5d3fa9e51cf15ccd6163","2b2e2805d7afd51c015e57e321c726976a77bff0615db4a0a7003441d2b3bf0d"],"ts":1793030927,"cid":"poa-mainnet-1","stamp":0,"sig":"4E2hPKv7Rqey5qtbqSaGTuxBDMF7bVeSRXKa8YQST2Apy4UUwq3MHVv71vShYp4sT7f7wo9QePohnaQqWqq5gGA8"},"checkpointed":{"height":137136,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T16:14:17.877Z","checkpoint_height":137136,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}