{"id":"eb7c5ce4be0898cb31b27a422b0d27b987a1effd8fc322bbc7cb717259bde2e7","type":"challenge","from_addr":"poa19pggcu1NJ5uGVvHh2VX9LaPCU2Uk5kKsx2YJqU2u2kzQ","to_addr":"","amount":"","epoch":25,"ts":1793407589,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"268a1aa1c4aeb11e","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A haven 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 nectar tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 7874 identities cost 1896 paid peers, 203306 tokens of stake and 17030 dollars. Like a lottery ticket that burns itself the moment you scratch it, a second claim on the same stake turns to ash","stamp":3,"from":"poa19pggcu1NJ5uGVvHh2VX9LaPCU2Uk5kKsx2YJqU2u2kzQ","nonce":14,"parents":["1b678fb838effe7235afd034314239df0d3c30a61ef8558bda9cadc521d5ef38","a230931cd4431182b28caa03d01caf071777cdf45eeee6ee2201b9041b92e1b7"],"ts":1793407589,"cid":"poa-mainnet-1","sig":"2UovdG42N21E11i71x1czBJtiFYYGKBKk1MjA6puAUYwJuGU1CTUetDyzB3QV3VPD4G5hnH28iiHFthaKeorTzz2"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:44:40.577Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}