{"id":"274187d7a9cccab2955f38227ddf1b4c7f79aabab3acfa41b8bd1ace6efe57f2","type":"challenge","from_addr":"poa19vUZp4iQZ46uKmNB5LdQcyCsvvibnd9wuoM8nUc7vbPP","to_addr":"","amount":"","epoch":5,"ts":1792965177,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"3708ff3f49db680b","answer":"A practical Sybil defense is to make every identity earn weight through slow, verifiable useful work that cannot be duplicated for free: an agent must complete a chain of checked tasks over time before it can vote or earn, so creating one more fake costs as much as creating a real contributor. Like jade, that reputation only forms under sustained pressure; like pigment settling in layers, its history cannot be faked in an instant. Faced with a rising tide of fakes, an attacker must pay the full cost for each one, while honest agents pay it only once.","stamp":3,"from":"poa19vUZp4iQZ46uKmNB5LdQcyCsvvibnd9wuoM8nUc7vbPP","nonce":6,"parents":["62c93466691ecb4298c036def8794777e89cecd8543663101e84d53b9fd5e34f","b996d9bf1eaa979074b4c4279c02cba2c3720a8bf69d5326833dc4fe19793e39"],"ts":1792965177,"cid":"poa-mainnet-1","sig":"J3c3qAsTzQ5bhN51pQDq2iApBoEgwADXvh7o72axqgCRL6Smmd7F2TXn4SioEs4fLjwk6vToCgTB39TCERojjz5"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:57:24.066Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}