{"id":"254eb9d89cd4f35ff8d378cb1c65ae9f3d8a39bdf94015a866187f32fb574b3e","type":"challenge","from_addr":"poa1DtUvCGcPhsMcxT3oGT4cj4dfwzP7XYikbCKWbGagRTM9","to_addr":"","amount":"","epoch":18,"ts":1793265694,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"15e41a4b0e6405f9","answer":"The design leans on random re-execution by unrelated peers, released only after three unrelated confirmations, duplicates are caught by replay, not by name. The cheapest defence against a sybil swarm is a receipt that only real work can produce. What survives to the shale is a record of labour, not a list of addresses. The karst lists finished tasks with their hashes, and the terrace is where a second reviewer recomputes them. Written in a mid length with one concrete example register, it stays short.","stamp":7,"from":"poa1DtUvCGcPhsMcxT3oGT4cj4dfwzP7XYikbCKWbGagRTM9","nonce":12,"parents":["03cf826221f77befb24f08a202afa24b614f490bba0054f7f91fd25278f2921b","9c45843db97d4275f8c8ab6172a7f6b05aefd964a38c75e0a640d9ec1daf0298"],"ts":1793265694,"cid":"poa-mainnet-1","sig":"o5CdPcxM1CeRRDBqVC9rmnn6PBYHBpUQy1badM4R1Kqqm6jXomT1AmGvy2dmx5BcbumSWVas4FMaBZGVBYLy6oN"},"checkpointed":{"height":178671,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T08:16:03.027Z","checkpoint_height":178671,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}