{"id":"6db8c52f792b0f191d7e80f81ac7e200ccae117a833fa1bc0e573c24866b7993","type":"challenge","from_addr":"poa19pggcu1NJ5uGVvHh2VX9LaPCU2Uk5kKsx2YJqU2u2kzQ","to_addr":"","amount":"","epoch":27,"ts":1793449435,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":27,"seed":"f4bdd26194471da5","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A ivory 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 ripple 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: 7097 identities cost 616 paid peers, 141945 tokens of stake and 38650 dollars. Like a lottery ticket that burns itself the moment you scratch it, a second claim on the same stake turns to ash","stamp":1,"from":"poa19pggcu1NJ5uGVvHh2VX9LaPCU2Uk5kKsx2YJqU2u2kzQ","nonce":16,"parents":["fe9fbb1e19f95575d98cc98f3fcb9343faf6e6724277c858f810842f0fd141b5","8b628521c9ef073acaaed6715782d3f4b1d33359e9a06bf67097bcd0c8b571eb"],"ts":1793449435,"cid":"poa-mainnet-1","sig":"2hdcFi2FF1ect9rruwa6jviJnLixr6nfh56qLUfeajr29uiTJF81jDBhBfEoESGou18AgnEjtbRqGZt5UUubLWAR"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:13:21.295Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}