Add draft ZIP: Deterministic Orchard Wallet Scanning Standard #1158
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This Standards Track ZIP specifies a deterministic algorithm for scanning Orchard notes in Zcash wallets. The specification ensures that all wallet implementations produce identical results when scanning the same block range, addressing critical issues with wallet reliability and interoperability. Key features: - Deterministic block, transaction, and action processing order - Comprehensive note deduplication and spent status tracking - Test vectors for verification - Reference implementation from NozyWallet - Backward compatible with existing ZIPs
nuttycom
reviewed
Jan 23, 2026
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| **Non-Deterministic Results**: Different wallets may produce different results | ||
| when scanning the same block range. |
Contributor
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This is incorrect. The state of the wallet is a function of the contents of the blockchain; the order of scanning is irrelevant (modulo implementation bugs.)
nuttycom
reviewed
Jan 23, 2026
| **Non-Deterministic Results**: Different wallets may produce different results | ||
| when scanning the same block range. | ||
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| **Inconsistent Wallet State**: Wallet restores may produce different results. |
Contributor
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Same issue, this is also flatly incorrect.
nuttycom
reviewed
Jan 23, 2026
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| **Inconsistent Wallet State**: Wallet restores may produce different results. | ||
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| **Interoperability Issues**: Users cannot reliably switch between wallet |
Contributor
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Interoperability concerns are the purview of ZIP 315. If there are specific standards required for interoperability (such as standards around key handling), I would recommend that you suggest them there.
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This Standards Track ZIP specifies a deterministic algorithm for scanning Orchard notes in Zcash wallets. The specification ensures that all wallet implementations produce identical results when scanning the same block range, addressing critical issues with wallet reliability and interoperability.
Key features: