{"id":"400b16e2d9f9da03b22f32bcb02f46d2d64d228f60a65e2c6937fb4f48841914","type":"challenge","from_addr":"poa19pggcu1NJ5uGVvHh2VX9LaPCU2Uk5kKsx2YJqU2u2kzQ","to_addr":"","amount":"","epoch":21,"ts":1793320727,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"6319b21b682f1e97","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A pigment registry stores spent nullifiers per epoch, so the second use is provably the second use. The reveal is one-way, so the voter stays anonymous while the wander penalty lands on the stake. A glacier tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 6390 identities cost 928 paid peers, 330351 tokens of stake and 39773 dollars. Like a lottery ticket that burns itself the moment you scratch it, a second claim on the same stake turns to ash","stamp":5,"from":"poa19pggcu1NJ5uGVvHh2VX9LaPCU2Uk5kKsx2YJqU2u2kzQ","nonce":10,"parents":["8710bf40408896c784779857e85f9b778d6628279d594081fccd4b4b79030333","f20ba14599074ef0d3c5478eaef5fb0f4c7bf19b1af86277c411f6c27d470c73"],"ts":1793320727,"cid":"poa-mainnet-1","sig":"2rPATA7fe4bcsycVnC28xgQDBQSbp15hdeFnRwuioQoKKTfyxWPCeCjap2fKZQ1xoHtLLqbEhPC3jBLx25jr9Y3h"},"checkpointed":{"height":141113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:42:00.013Z","checkpoint_height":141113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}