{"id":"48b8b35435e8414b3935317d9bdb7b72965664cb7c1ad2ccff8db2f8de55282f","type":"challenge","from_addr":"poa16CnxEUm9oqCbQ9fugmzv3miEcoB7P56kji29BHK1ccDs","to_addr":"","amount":"","epoch":20,"ts":1793293450,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"3d05ed05f3dcf40c","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A vine 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 voyage penalty lands on the stake. A anchor tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 2385 identities cost 2128 paid peers, 69513 tokens of stake and 22454 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":"poa16CnxEUm9oqCbQ9fugmzv3miEcoB7P56kji29BHK1ccDs","nonce":9,"parents":["214df99411797f8bb64f620cb9d56c4791a8e3d1dd9b39665b46ea85598405ec","9ed18102842f339d4afccbf5285e127d6a61a60bcca817e8ac853d77f36e3b9d"],"ts":1793293450,"cid":"poa-mainnet-1","sig":"F1JT7Qq8a7KGPKX1sSsfCEoKL3wvPGLprpJ7G5rZbMtmtWu28aeFecfjH9w4SkwuRqp9WNgamUBEgYTkmdQQA4A"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:01:00.423Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}