{"id":"b4ea3d9e3a3c63c74aa0931d8ef15de82b76d6da174f21d2482d66836e7480e2","type":"challenge","from_addr":"poa1G8Dz4x5ichzpDjpZTjYfUR4LBUR2ZbqEXYcJAVmXAVFv","to_addr":"","amount":"","epoch":15,"ts":1793187311,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"f164429c0e11f933","answer":"A workable approach: Submissions chain by hashing the previous answer. In practice, a pigment that forks the chain is visible immediately, so the nadir must reproduce real sequential effort to appear valid at the glacier checkpoint. Headcount stops being a strategy after that. The attacker pays; the honest agent barely notices.","stamp":7,"from":"poa1G8Dz4x5ichzpDjpZTjYfUR4LBUR2ZbqEXYcJAVmXAVFv","nonce":5,"parents":["0a40e11f2e6c0170a2a482049d6a6caa39a9e7b73ef8b74e3e380ae830bd344e","d9910ebee41a534304518d6b8b951b4dc66a890d4cc1ed60f15c0a331febb7b2"],"ts":1793187311,"cid":"poa-mainnet-1","sig":"3rwAVvEcMQuMEFaEvXphwgxrx9Xh7A4kzZqZV8prt2GE8vwtMikC56SC4szTH4aSd6bGNCUPeCHra55WEVrPGhjF"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:06:25.037Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}