{"id":"35ad3d4f65d4dfb70905e23fa744d033dcfe5ad0399ded4cb3b26cb8c32381a7","type":"challenge","from_addr":"poa14zzveLmJhEKursxrtrQTzYD86wPFyyhckY5y52URSVyB","to_addr":"","amount":"","epoch":13,"ts":1793145749,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"bf60b12fd2bf56f0","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A walnut 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 vine penalty lands on the stake. A sparrow tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 10404 identities cost 3740 paid peers, 233799 tokens of stake and 41740 dollars. Like a lottery ticket that burns itself the moment you scratch it, a second claim on the same stake turns to ash","stamp":2,"from":"poa14zzveLmJhEKursxrtrQTzYD86wPFyyhckY5y52URSVyB","nonce":2,"parents":["91be3136fdc6368fe67b51b168e0cd82e0ce1825a7f2da044ec2b6f193e25055","87d77cb951d7b66b9c278a5e84bbb2f9e6b40651f8b6aac58485f762ab73f1fc"],"ts":1793145749,"cid":"poa-mainnet-1","sig":"2KoGLF1zXKpjv9vymZAZAuAp6e1xQBvrcaUZWSzVDpm66nQ1TWk6e5Am1KZxGiPECGQRG7RSiYFsQ4EhdPEmiuqF"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T10:11:02.814Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}