refactor(key-wallet)!: unify mnemonic parsing on one auto-detecting path - #981
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe PR changes mnemonic parsing from explicit English selection to automatic detection across supported BIP-39 languages. It updates derivation and wallet creation APIs, adds multilingual coverage, and migrates dependent call sites and tests. ChangesMultilingual mnemonic support
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🔵 Low · up to The mnemonic parsing refactor and caller updates are covered by passing checks with no identified correctness or data-safety issue. The PR is mergeable with owner awareness because a test module is still included in normal library builds, adding bounded build overhead for follow-up. Sequence Diagram(s)sequenceDiagram
participant Caller
participant WalletFFI as wallet_create_from_mnemonic_with_options
participant Mnemonic as Mnemonic::from_phrase
participant Derivation as AccountDerivation
Caller->>WalletFFI: provide mnemonic phrase
WalletFFI->>Mnemonic: parse supported wordlists
Mnemonic-->>WalletFFI: parsed mnemonic with detected language
WalletFFI->>Derivation: derive wallet keys
Derivation-->>Caller: wallet or key result
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Inline comments:
In `@key-wallet-manager/src/lib.rs`:
- Around line 800-801: Apply the cfg(test) attribute directly to the
mnemonic_language_tests module declaration so it is compiled only in test
builds; ensure the attribute precedes mod mnemonic_language_tests and remove the
unattached attribute.
In `@key-wallet/src/mnemonic.rs`:
- Around line 462-465: Add an assertion in key-wallet/src/mnemonic.rs:462-465
within test_from_phrase_any_language_autodetects that the French fixture reports
Language::French. Add French regression tests in
key-wallet-ffi/src/account_derivation.rs at 126-135, 207-216, 364-373, and
404-413, covering BLS, EdDSA, extended-private-key, and private-key derivation
respectively, using the detected language and expected French-derived outputs.
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📒 Files selected for processing (8)
key-wallet-ffi/src/account_derivation.rskey-wallet-ffi/src/mnemonic.rskey-wallet-ffi/src/mnemonic_tests.rskey-wallet-ffi/src/wallet.rskey-wallet-ffi/src/wallet_tests.rskey-wallet-manager/src/lib.rskey-wallet-manager/src/mnemonic_language_tests.rskey-wallet/src/mnemonic.rs
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## dev #981 +/- ##
==========================================
- Coverage 76.91% 76.91% -0.01%
==========================================
Files 329 329
Lines 82897 82859 -38
==========================================
- Hits 63757 63727 -30
+ Misses 19140 19132 -8
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Follow-up to #980, which fixed non-English mnemonic parsing by adding from_phrase_in_any_language next to the English-tagged from_phrase. Two parse paths is how the original bug happened: validation accepted every wordlist while key-material parses stayed English-only. Collapse them: Mnemonic::from_phrase(phrase) IS the auto-detecting parse (English first, keeping its diagnostics when nothing matches), Mnemonic::validate(phrase) is defined as from_phrase(phrase).is_ok(), and Language remains an input only for generation and wordlist access. The derive_from_mnemonic_*_at trait methods drop their language parameter and the FFI account-derivation exports no longer detect-then-pass a language. BREAKING: Mnemonic::from_phrase and Mnemonic::validate lose their language parameter; from_phrase_in_any_language is folded into from_phrase; AccountDerivation::derive_from_mnemonic_{extended_xpriv,private_key}_at lose their language parameter. Runtime behavior is unchanged from #980 except error text for fully invalid phrases, which now embeds the English diagnostics. Adds two invariants #980's tests don't pin: a phrase checksum-valid under BOTH Chinese wordlists asserting the seed equals the independently computed sentence-PBKDF2 (first-match auto-detection can never change a seed), and a passphrase reference vector for a non-English phrase. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Issue being fixed or feature implemented
Follow-up to #980, which fixed the dashwallet-ios field bug (French recovery phrases validating but failing seed derivation / wallet creation) by adding
Mnemonic::from_phrase_in_any_languagealongside the English-taggedfrom_phrase(phrase, language).Two parallel parse paths is exactly how the original bug happened:
mnemonic_validateaccepted every wordlist while the key-material parses stayed English-only. Keeping both invites the next divergence.What was done?
Mnemonic parsing now has exactly one path:
Mnemonic::from_phrase(phrase)is the auto-detecting parse —from_phrase_in_any_languageis folded into it, and the language-tagged constructor is gone. English is tried first (perLanguage::ALLorder), so English phrases parse byte-identically and, when nothing matches, the error keeps the English diagnostics (unknown-word index, bad checksum) inside a "does not match any supported BIP-39 wordlist" message.Mnemonic::validate(phrase)is defined asfrom_phrase(phrase).is_ok()— validation and key derivation share one code path and can never disagree again.Languageremains an input only where it belongs: mnemonic generation and wordlist access.AccountDerivation::derive_from_mnemonic_{extended_xpriv,private_key}_atdrop theirlanguageparameter; the FFI account-derivation exports no longer detect-then-pass a language.Runtime behavior is unchanged from #980 (the C ABI never carried a language for parsing), except the error text for fully invalid phrases, which now embeds the English diagnostics.
How Has This Been Tested?
All of #980's regression tests still pass (validate/parse symmetry across all 10 languages at the FFI layer, French reference-seed vector, NFC input, English-first determinism, manager + serialized-bytes integration). Two invariants they don't pin are added:
Suites: key-wallet 671, key-wallet-ffi 245 (
--all-features), key-wallet-manager 56+integration — all green;cargo fmtclean;cargo clippy --workspace --all-features --all-targets -- -D warnings(the pre-push gate) clean;RUSTDOCFLAGS="-D warnings" cargo docclean.Breaking Changes
Mnemonic::from_phraseandMnemonic::validatelose theirlanguageparameter;from_phrase_in_any_languageis removed (renamed tofrom_phrase);AccountDerivation::derive_from_mnemonic_*_atlose theirlanguageparameter.Downstream
dashpay/platformcall sites need a mechanical update at pin-bump time (drop theLanguageargument; the hand-rolledparse_mnemonic_any_languagehelpers inrs-sdk-ffi/rs-platform-wallet-ffi/rs-platform-walletcollapse ontoMnemonic::from_phrase). Note dashpay/platform#4455 currently bumps tob66db390(#980) — a pin bump past this PR pairs with that cleanup.Checklist
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