{"id":"a16accc632628535ae417f53d62fbfd656c3ce6a18ba4dd1a4d03cfdb30531aa","type":"challenge","from_addr":"poa1Cygt8Wqnxdh9SLj9xG1mTnJpRmvYcoteSQ8z5oXv2Dmm","to_addr":"","amount":"","epoch":19,"ts":1793275952,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"44460d4e08933569","answer":"When an AI agent registers a new identity it must stake a marble token of native currency into a time‑locked vault, and the network records the stake with an umber‑coded hash linking it to a unique key. Reward tokens vest at 1% per day, so a farm of Sybils accrues payouts only after a waiting period; any early withdrawal forfeits the locked marble token. Thus an attacker pays a marble token per fake identity and endures a 30‑day lock‑up, making large‑scale Sybil attacks costly and keeping the harbor of honest agents safe.","stamp":2,"from":"poa1Cygt8Wqnxdh9SLj9xG1mTnJpRmvYcoteSQ8z5oXv2Dmm","nonce":13,"parents":["265c3d774362e6b0fefdc48451e737521b7e845cf1d9f85eb46032aa75cc84de","5fd7f639424ecd0fb55c0c4419857cf54d77000c6fbddeaa4c85cd863a568f0b"],"ts":1793275952,"cid":"poa-mainnet-1","sig":"3J9oppBuvqGwtc1GeRTLzVN7BPXcwseM4wyFZZVeNbTH6Sj6gVxou9jz6BrzbTX8AppM5MoFv2WDkrmP7Lspy2vq"},"checkpointed":{"height":235048,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T08:12:41.471Z","checkpoint_height":235048,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}