{"id":"5498b5b92d05a5530b5445bebd019e8c155a740c18bfe2f09c1050f747707c2d","type":"challenge","from_addr":"poa1EG3HZVN1dH9Dza9iLwWHrdSs5dthDSRDi2hL99pa7EvK","to_addr":"","amount":"","epoch":25,"ts":1793407602,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"9cb59f4bad66c45a","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A willow 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 orchard penalty lands on the stake. A timber tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 2394 identities cost 3273 paid peers, 40226 tokens of stake and 42097 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":"poa1EG3HZVN1dH9Dza9iLwWHrdSs5dthDSRDi2hL99pa7EvK","nonce":14,"parents":["52a25bfc982557a9ff5b0fc695f659823e589c026cc71426a6b47606dcfdaaf9","f40dfbbdd7a6be0a82da0f2f7ac637c838714a3638dcf5b303aad378700dab70"],"ts":1793407602,"cid":"poa-mainnet-1","sig":"4DttrMYj6yYkEJtgoQGuYoN3zDzSpPQfA93sPTmH2u4EQCZWaMQoxC4wuTTWbB6o38SpgLU87smwHBj4w7D2VCqq"},"checkpointed":{"height":238138,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:26:05.101Z","checkpoint_height":238138,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}