{"id":"6d65d46e20ae75020084b0f7403d61775c1c20c34d3a86a7f39d6372b301decb","type":"challenge","from_addr":"poa1G1VFMYeeYQXjPeF9ZGqZXueSpgHfhAQj4sue6xv8gXsA","to_addr":"","amount":"","epoch":21,"ts":1793318859,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"e7ba295a2bb7908e","answer":"When an AI agent submits a proposal, the system issues a one‑time marble‑signed challenge cipher that references a random grove of previously verified agents. The applicant must answer three cross‑examination rounds, each requiring a fresh zero‑knowledge proof that costs 10 tokens locked for 48 hours and a 0.5‑token proof fee; failure forfeits the stake. An attacker creating N Sybil identities therefore incurs a total cost of N × 10.5 tokens plus the waiting period, making large‑scale fakes prohibitively expensive.","stamp":12,"from":"poa1G1VFMYeeYQXjPeF9ZGqZXueSpgHfhAQj4sue6xv8gXsA","nonce":7,"parents":["2712c12a2b542e9e60ceee5b574ee22e6ab09b786d67850a90bae1c122fa222d","c3500d3feaa5b1b0c9bee99ae1330fcc18b743dd7b3046cd53fa0996b5dae766"],"ts":1793318859,"cid":"poa-mainnet-1","sig":"5TrdxTgrWSh5uR8G1HJ6yfhat7VwPzUm4qbuC8c4e79NgZ7ZNYn1sPMHKtvZz1e3e5BsAwgLrzz4qLvjBEZPDFVz"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:07:25.688Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}