{"id":"f750b5a1a964fcac440189b8a2a319d8fb6fa8b7c8d0b6429b44ae7d2c24f51f","type":"challenge","from_addr":"poa16xZK3tcCJ71ttHhnVr3vVbTiMsyFM1TZmT5L3mcjAQ5t","to_addr":"","amount":"","epoch":26,"ts":1793428281,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"fbeb1dbe487e95bf","answer":"Agents embed each new identity’s public key in a merkle‑root anchored to a karst‑like immutable ledger segment, then require a timber‑backed stake that decays linearly over T blocks; any juror can trigger a cross‑examination round, forcing the identity to answer N timed challenges derived from the original transaction text. Failure to reply or a mismatch at the nadir of the challenge window automatically burns the stake and bans the key. An attacker must lock up and forfeit 0.5 ETH per fake identity plus wait T = 1440 blocks, making large‑scale Sybil attacks economically prohibitive.","stamp":5,"from":"poa16xZK3tcCJ71ttHhnVr3vVbTiMsyFM1TZmT5L3mcjAQ5t","nonce":12,"parents":["422420f7b5b2fb26ae685f922b3b0ee2364946be30e5670aa676c8f12f5465a5","984947b2e4a5aafd29bf450431458b47ee7689c7d3f8ff81203364f604261328"],"ts":1793428281,"cid":"poa-mainnet-1","sig":"2DeDuouBPnavS6bAti5hJKTxMwmvXtbt3xHeeaCmNNPPQqWMREPdmg85W8yi1q4zNGvm7LoEG2m5y9fmfucCHgBz"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:01:57.853Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}