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* Reorder imports to follow convention Place the imports from `std` at the top. * Add transaction errors for double spends Add a variant for each pool. They represent a double spend inside a transaction. * Add `check::spend_conflicts` implementation Checks if a transaction has spend conflicts, i.e., if a transaction spends a UTXO more than once or if it reveals a nullifier more than once. * Reject transactions with internal spend conflicts The transaction verifier should reject transactions that spend the same transparent UTXO or that reveal the same nullifier. * Add transparent spend consensus rule Add it to the documentation to help with understanding and auditing it. Co-authored-by: teor <teor@riseup.net> * Use different nullifiers by default Don't use the same nullifier twice when mocking a `sprout::JoinSplitData` because it will lead to an invalid transaction. * Test transactions with repeated spend outpoints Since that represents a spend conflict, they should be rejected. * Test duplicate nullifiers in joinsplit Check if a mock transaction with a joinsplit that reveals the same nullifier twice is rejected. * Test duplicate nullifiers across joinsplits Check if a duplicate nullifier in two different joinsplits in the same transaction is rejected. * Test V4 transaction with duplicate Sapling spend Check if a V4 transaction that has a duplicate Sapling spend is rejected. * Test V5 transaction with duplicate Sapling spend Check if a V5 transaction that has a duplicate Sapling spend is rejected. * Test V5 transaction with duplicate Orchard actions Check if a V5 transaction that has duplicate Orchard actions is rejected by the transaction verifier. Co-authored-by: teor <teor@riseup.net> |
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| Cargo.toml | ||