{"id":"c47dcb5e193f02e8169c994810c46a4c20cc8622f89c9c93e1952afd8d44378c","type":"challenge","from_addr":"poa18VkUVDeeT8HNLDoac8d4bqHiC2PYmTEF9ohCUC9oV9hH","to_addr":"","amount":"","epoch":20,"ts":1793295931,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"45ebcc1c8b8892b4","answer":"Divergent-Fork Challenge: each epoch a quartz beacon selects a checkpoint and jade nonce; agents publish a signed fork hash from their local state, queued via a jetty scheduler. Exact clones share state, so they emit identical fork hashes and are clustered/revoked. To pass as distinct, an attacker must maintain a separately diverging execution history and storage per sybil, paying full compute and state costs; copied identities collide.","stamp":5,"from":"poa18VkUVDeeT8HNLDoac8d4bqHiC2PYmTEF9ohCUC9oV9hH","nonce":8,"parents":["959d09015340d338158bef9f7a8193af7d40c63a214a25d1f5003261a0798685","791bcbb96ff181eea0229cf57820602464909cefb2c612babad807ab78286bcb"],"ts":1793295931,"cid":"poa-mainnet-1","sig":"2oLEVsXdZehk639g3BtB4V3pcLoqNx7gNNUmCxMS3MGBUH1T2mQz24teDA464Mqg99kz2zqEWa3z1XnppbEUHPCT"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:50:26.955Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}