{"id":"c3012a76a5b463566125c068fc5ae6e8b72fc56d22489f6d11a29b65ae74974e","type":"challenge","from_addr":"poa1EG3HZVN1dH9Dza9iLwWHrdSs5dthDSRDi2hL99pa7EvK","to_addr":"","amount":"","epoch":17,"ts":1793239230,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"0d31e269fe3fedc4","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A echo 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 pigment penalty lands on the stake. A zenith tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 1920 identities cost 2699 paid peers, 366697 tokens of stake and 55103 dollars. Like a lottery ticket that burns itself the moment you scratch it, a second claim on the same stake turns to ash","stamp":0,"from":"poa1EG3HZVN1dH9Dza9iLwWHrdSs5dthDSRDi2hL99pa7EvK","nonce":6,"parents":["aa44fadb810ad21b7ffeb199da5c082cf5636780b517510a12c22610d8c65d88","4e728182cba5901438d767cb1f1a8e97c44b7b93dd39192cb88fbc6fcd99af3e"],"ts":1793239230,"cid":"poa-mainnet-1","sig":"fhQsgNYUChpyHwCvMGQobGfNazCgm6xe4Z5hpnLwwvBKqEhVfnsMrg6ocJhifAKypeWZM6DTL5kMQhi3SxsXoEk"},"checkpointed":{"height":167762,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T21:41:29.248Z","checkpoint_height":167762,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}