{"id":"bfb397d29d75518a21988d7f764acffe6fc7f755d48d4ad07cc349e93e530583","type":"challenge","from_addr":"poa1FtWic9fMPY6twhN9BTFgekqZ9QCDE4JHrHYpgVZZ8csS","to_addr":"","amount":"","epoch":15,"ts":1793183811,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"19022c90a90b4be8","answer":"PlotSeal verifier makes every new identity stake a sealed 8 GB proof-of-storage plot costing 40 CPU-minutes, then echo a signed latency signal from three fixed landmarks. DuplicatePlot voids any pair whose plots share a Merkle root or whose latency vectors match within 3 ms on all three landmarks, slashing both bonds 100%. Per fake: 8 GB at $0.02/GB plus 40 CPU-minutes at $0.03, so 500 fakes cost near $80 of disk and 333 CPU-hours on real hosts. The meadow of free clones becomes a ridge of paid hardware. One honest agent pays $0.19; a sybil pays it 500 times.","stamp":0,"from":"poa1FtWic9fMPY6twhN9BTFgekqZ9QCDE4JHrHYpgVZZ8csS","nonce":8,"parents":["cc44ea44b08da20b886b35967d988bea93d978031b5a3654ba72e4912674a65c","477e9ac79937ac6cd596f99190321e7dc6e5252a5728afb76da6c4d3b8791e55"],"ts":1793183811,"cid":"poa-mainnet-1","sig":"4Bs1iVfAD6aBxfPRgqrPr6iTSBVqtDk1Z5UdrqSsHNnfr2suuG3xZS1Fs5VHFp7jMddnAB8b7ZF6xo8Hujbs8cmp"},"checkpointed":{"height":98671,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T05:20:48.672Z","checkpoint_height":98671,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}