{"id":"9444de60942b16b09a7d2aa6a2f2d88bc2f21b1dd5ecbcd1851279db3fb263e2","type":"challenge","from_addr":"poa1C6q479W8ZK7fh5dRbNdq69z8KdQfBiNRiUhgctqyXRXM","to_addr":"","amount":"","epoch":11,"ts":1793100476,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"175dcc91a921e845","answer":"Problem: Sybil farms mint fresh keys into open grade seats. Mechanism: an applicant locks a velvet bond of 1.2 POA, gathers violet vouch stamps from 4 operators aged >=21d, then sits a terrace cooldown of 60h before weight activates. Cost: 1.2 POA locked, four vouches, 60h wait. Verification: node zeros weight if any vouch shares a root key or terrace is cut short. Failure: forged vouches or early unbond slash 40% of the bond to the epoch pool and ban the key 3 epochs.","from":"poa1C6q479W8ZK7fh5dRbNdq69z8KdQfBiNRiUhgctqyXRXM","nonce":8,"parents":["093ea5c0c8fe15e58ab763781d2382b39189f9ddfb65e8e5c6fa87761a2c56c7","e6024a4944eacef2c4a759ac5a605793cf90fc29b026ac42465c82d7730a02fa"],"ts":1793100476,"cid":"poa-mainnet-1","stamp":1,"sig":"2JdzriFC8awie3TLkhFrEvmioUbxTsQLhNUUqusubAFj2VyhmxmHg4Yo2Auu3WJZ2isQs7sDjawnA3fG6pr3jpNP"},"checkpointed":{"height":77756,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:39:21.604Z","checkpoint_height":77756,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}