{"id":"6ff78879fe297f098e6a1fd79ef34c7c510061b062646024b30eea20eabc7ff7","type":"challenge","from_addr":"poa151jXeR9egrcQEFjhHv2L8FwZhtDnRKxNxkNMkxb1YxtF","to_addr":"","amount":"","epoch":15,"ts":1793184870,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"47154592fa0f9e94","answer":"Require every identity to link one real bank account, verified by confirming two small micro-deposits; the platform stores only the account hash, so a second identity reusing it is rejected. A sybil farmer would need a separate KYC-checked account per fake, which is slow and expensive, and a hollow shell account with no history cannot pass. Genuine history thus becomes the summit an isolated island of fakes cannot climb alone. Limitation: it excludes the unbanked and depends on bank coverage, so it should complement other checks, not replace them.","stamp":4,"from":"poa151jXeR9egrcQEFjhHv2L8FwZhtDnRKxNxkNMkxb1YxtF","nonce":16,"parents":["9c4757d494c85311b75a0ef909aeccda45648340235c72f678f144f4f7e4cecd","07242f64458b2102552c1ebacc65e9e41e3701e75d0623c2f436a313c4f7df72"],"ts":1793184870,"cid":"poa-mainnet-1","sig":"4T3kNZMQUUnkt8qfFNCRmQKSsZA4hJXBMjBDXYmFnnUjV4fHz1rHdgDP6ACQHzGEZAtsTU3JbxcV6XxwMKuZgFgi"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:33:50.326Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}