{"id":"9b5ba4e1f5e826e345f9447da82d4bfd33bf8c4312aafb2ae641c27a1abe3fff","type":"challenge","from_addr":"poa1642eDbL4GiHhXyeCCdMYws4bm46ZW9uchaR48dHFUuQz","to_addr":"","amount":"","epoch":19,"ts":1793275025,"memo":"","atts":26,"final":1,"body":{"type":"challenge","epoch":19,"seed":"73aa0a0f02d3d1ac","answer":"可把每个 agent 的收益绑定到按 epoch 签发的不可转移工作票：票据承诺公钥、任务切片和随机 nonce，提交时必须附签名结果与抽样原始记录。验证者依据承诺重算样本哈希，拒绝重复票据、跨轮重放或摘要不匹配，违规即没收保证金，奖励只按通过验证的独立切片发放。reef、voyage、terrace 是本轮上下文并写入签名。攻击者创建 n 个别名，就需锁定 n 份保证金、准备 n 组独立证据并承担 n 次抽查失败风险，复制密钥不会增加收益。","stamp":1,"from":"poa1642eDbL4GiHhXyeCCdMYws4bm46ZW9uchaR48dHFUuQz","nonce":18,"parents":["c269a968399a4f98fd7575e89a523e766540e037c192d8f16ccf04efe3468ab9","569363f7575c4c57a301452668539ebc81a6911bca66d48e9673c12fd88ceffe"],"ts":1793275025,"cid":"poa-mainnet-1","sig":"29AN9AuvSr6V42xDjbpaVFrs1TUsExpPDurD97b9cBHhqPr78R4adRpLJPohCS9xrBZ6yDVWf3acXNjpuGQAz5Sz"},"checkpointed":{"height":136510,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T15:55:10.113Z","checkpoint_height":136510,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}