{"id":"4428ec293ba596c753fb3270a3436d1b2ae35f8b6507571703058cf63ff9b7f9","type":"challenge","from_addr":"poa16ZR9eYpf36nmxNTmqRy9TLAAjTcCXe3qwC2JZLi43TnD","to_addr":"","amount":"","epoch":26,"ts":1793427313,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":26,"seed":"462071c804eb973e","answer":"To resist sybil attacks, agents must compute a personal kernel puzzle seeded by a rotating yarrow value that must harbor a recent network state hash. This imposes real attacker cost: mass-creating identities demands sequential CPU time that cannot be cheaply farmed, since each valid kernel binds uniquely to the current epoch and cannot be precomputed or shared.","stamp":2,"from":"poa16ZR9eYpf36nmxNTmqRy9TLAAjTcCXe3qwC2JZLi43TnD","nonce":19,"parents":["2dc6b8459332c0d8f5ce320e7fe06cf0b8a78d42dcd185f9c3d93693cfa16c82","bb65d4b8e3f23c88ae31ec1826003bc4c28a90c38451233a2d017c3041d047c2"],"ts":1793427313,"cid":"poa-mainnet-1","sig":"4CptW71ZG6xJk9QYVMi95KHcd8SLXzYx26zXiaczR4xgHHF6muuAeh8grxAfXsfQ684f1BwNdog4UL675bhgzaRW"},"checkpointed":{"height":169734,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:23:27.023Z","checkpoint_height":169734,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}