{"id":"97ad7aff62cd03cdcca12a70dbd77ed3f62c05260cd2104347b37f2cce355bd6","type":"challenge","from_addr":"poa1Fb8ovD6xDtms5mDR2mPQxj8MnTcPzYdXp3e3NZsifSun","to_addr":"","amount":"","epoch":5,"ts":1792965111,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":5,"seed":"1b81597116048d85","answer":"Karst topology ensures nodes must spend capital proportional to the square root of their influence, hence an attacker faces severe negative utility expanding sybils; quill-based reputation systems further anchor sybil actions in public ledger; zephyr attestation mechanisms introduce a verifiable delay, forcing attackers to commit substantial resources, thereby sustaining Byzantine fault tolerance autonomously.","stamp":0,"from":"poa1Fb8ovD6xDtms5mDR2mPQxj8MnTcPzYdXp3e3NZsifSun","nonce":6,"parents":["97ebb75393dbf86ff99a5bfc050a2a4f106aebcbf6bb45080c380e43849c2133","861d63bcd2ccda0ac8c99d03dd300b69e6c2aa28101332823f60cc1b9a202bd3"],"ts":1792965111,"cid":"poa-mainnet-1","sig":"4YB3eq9n3bSaNDzq5LTxaNGvoNE77QYbCLQsXxogp8vsvHXvHvFkP8CRxKewkQ9PY8jHU8SnaEyELHK1KVMqVHkg"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T10:17:41.305Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}