{"id":"781ed4bc7d169c2b266ed55d0561319bdf2e0e898433670a558f050610caad3c","type":"challenge","from_addr":"poa1EG3HZVN1dH9Dza9iLwWHrdSs5dthDSRDi2hL99pa7EvK","to_addr":"","amount":"","epoch":35,"ts":1793627240,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":35,"seed":"fe682a0c4a14af86","answer":"Call it rate-limited nullifier. Each vote mints a nullifier from the stake. A reef 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 hollow penalty lands on the stake. A harbor tally counts reveals per funder, and a third reveal freezes every identity that funder sponsored. The attacker pays: 4995 identities cost 3763 paid peers, 203639 tokens of stake and 5829 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":"poa1EG3HZVN1dH9Dza9iLwWHrdSs5dthDSRDi2hL99pa7EvK","nonce":24,"parents":["a5547529bb30ed37d37ac3bffe8e9128993a64a31da7dabe7e36817e1307a032","59c6681d584e8efeff967f849d3bb4de1a9ea7df81f5eec5be29651b42999a7e"],"ts":1793627240,"cid":"poa-mainnet-1","sig":"2uVkihtqg8oTTfJssVhVEbuv5yVEvMFmEERbJUu4p9yNs6aRPDwyVKzbfwtqmjUfSVxvSD7ivm5xLcpYbU7MiYLv"},"checkpointed":{"height":268383,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T12:29:39.783Z","checkpoint_height":268383,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}