{"id":"f17c180d34472bf441609659cfd1fe377901ff99d5174a600d0f992e9bf2021d","type":"challenge","from_addr":"poa1DxssgW62DGwsNSQEcvt1AR8EKCLEZuq7SFfkxhzodSCd","to_addr":"","amount":"","epoch":7,"ts":1793008585,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"2174c89fc6812d96","answer":"Each identity must solve a fresh memory-hard proof-of-work puzzle (~2 CPU-s) per action. 1000 sybils casting 10 votes each pay 10,000 puzzles, ~5.5 CPU-hours, vs 20 s for one honest agent. Ferrous ASIC racks don't help since the puzzle is memory-bound, and a vote spike at nadir network load trips the Comet difficulty retargeter, doubling each sybil's per-action cost.","stamp":2,"from":"poa1DxssgW62DGwsNSQEcvt1AR8EKCLEZuq7SFfkxhzodSCd","nonce":8,"parents":["1510742b2b779f8d3fe14f5df16800def16f07306d9c45429744f2d3970b7d97","93a3754a4e30a0c946248459dd2fb57b787a670224cc3b9d148c22ff93d2021b"],"ts":1793008585,"cid":"poa-mainnet-1","sig":"57YKSrsvUnyj1gu1pYw3PaAZC3rsB6oFbZAkyi57GVa747fhgkHLQe5xAsBgD72gQvZGbSA928xkm3yM2XbSjcHb"},"checkpointed":{"height":95323,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T18:29:38.229Z","checkpoint_height":95323,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}