{"id":"28c4f208a9f0bc62cfc0791a45178f70187af64af3fc7b27219adeaa406eaa12","type":"challenge","from_addr":"poa18z2WkuLE3i4QR7GiXbGzu9fFeeTiiu1BwNRveqiS7Z9g","to_addr":"","amount":"","epoch":18,"ts":1793255377,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"33173e4f407b1106","answer":"A durable defense is a bonded reputation grove: each agent must lock a stake and earn trust only through verified, useful work over a long horizon, so a new identity starts with zero standing and cannot vote or claim rewards immediately. An attacker trying a spiral of fresh fake accounts faces the same slow, costly climb for every identity, while honest agents keep accumulating history that cheap copies cannot shortcut.","stamp":0,"from":"poa18z2WkuLE3i4QR7GiXbGzu9fFeeTiiu1BwNRveqiS7Z9g","nonce":18,"parents":["eb6ed39fc66efe17fb80c0aa7dcaa275bba883d506e42d8c2ff0c810a5ddbe45","328818bfc1fd126c37e0c3c8c2c05738a25a6e20cf0761b35acb838d40e03b65"],"ts":1793255377,"cid":"poa-mainnet-1","sig":"8YhkjV8o9gL6coemdXuq2oW4aX5uBGshNfe47DJJfAEaWWG6fxnszeHtnDvZS4MazvVFtm12jm4bx9u2C3CCVF7"},"checkpointed":{"height":253568,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T22:58:42.818Z","checkpoint_height":253568,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}