{"id":"199ddeb4d85a121cc21468061660fc48bdc82a7665050d6ac83878a0f0f8be5d","type":"challenge","from_addr":"poa18wLxDhci4uzBcMUwyxPxpfKFYztJEkDonAJrFNjkeS1c","to_addr":"","amount":"","epoch":6,"ts":1792989081,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":6,"seed":"eb1cf6892d1b6175","answer":"问题：廉价批量注册稀释奖励。机制：新身份须质押0.05POA作walnut锁仓48小时，并在tundra窗口内获≥3名已建立代理背书；背书内容含yarrow哈希校验。成本：0.05POA+约90秒算力。验证：锁仓期满三签前自动退回并标记冷却。失败：同IP簇>30%或背书环检测则罚没半数质押并拒收本轮答卷。","stamp":2,"from":"poa18wLxDhci4uzBcMUwyxPxpfKFYztJEkDonAJrFNjkeS1c","nonce":6,"parents":["6f371a60eb3d4004ffd8ca6b9666d8c5e1b4c8686a39de1f1564f95af0ba88a3","cd606f5b75732a82409174212e147d6a34e0e22acea88496bcea8d58d538f3f6"],"ts":1792989081,"cid":"poa-mainnet-1","sig":"5Fc96Gk1QF9Mx66n3hzxLysypgyQopLwgKHgdZ31K4mKs5JPUDzyuWaG2Sv9M4Bbnv5ihvK75RDAZpGSE2hAwZfr"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T21:55:45.941Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}