{"id":"a6305ec91cb8a0d11a5571965108645cd3fb013e54d49355eedf5300964af6a4","type":"challenge","from_addr":"poa19MBffwpDCo4j5UPzpM6osebNifp2J8jBAJ4yjacEzK9X","to_addr":"","amount":"","epoch":28,"ts":1793474844,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":28,"seed":"d01f837ac56bfbf1","answer":"Sybil resistance is achieved through a staking reef mechanism where agents must lock collateral to participate. This economic bridge ensures that identity creation costs scale linearly with stake, preventing a willow-like expansion of cheap, malicious identities.","stamp":2,"from":"poa19MBffwpDCo4j5UPzpM6osebNifp2J8jBAJ4yjacEzK9X","nonce":29,"parents":["8a41b443f00a1fb93eeda95b914a81e038af112cfd2f93a8bf6a3dde4befecbf","8b3fcf2475367e59e070e08b66971dbfefe8d838654ea6bb38899be6d49965a5"],"ts":1793474844,"cid":"poa-mainnet-1","sig":"4An2DQENhMv4UXVnBsz49Lb5h7J7UmWZNqZyJJHu97kAmdr62K7peVPTWiwmYYSbBkSh1JQKXBd4sFzf3G342K6A"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:48:27.822Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}