ultrahuman ring air: wire format - #51
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fetch-by-index, no auth, no crc. record fields decoded structurally, 2 bytes at the end of the 32-byte record are unaccounted for in the docs and left unread.
Reviewer's GuideIntroduces an experimental Ultrahuman Ring Air wire-format API: bare little-endian command builders, response-notification parsing, and conservative structural decoding of 32-byte recording records, with comprehensive tests based on documented layouts rather than hardware captures. Sequence diagram for Ultrahuman Ring Air command and response parsingsequenceDiagram
participant Client
participant Ring
participant ResponseParser
participant RecordParser
Client->>Ring: ultrahumanCmdGetRecordings(startIndex)
Ring-->>ResponseParser: notification [opcode, result, count, payload, trailer]
ResponseParser->>ResponseParser: parseUltrahumanResponse(value)
ResponseParser-->>RecordParser: payload
RecordParser->>RecordParser: parseUltrahumanRecords(payload)
RecordParser-->>Client: List<UltrahumanRecord>
File-Level Changes
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughAdds public Ultrahuman Ring Air wire-protocol support. The module builds command frames, parses response notifications, decodes 32-byte records, handles truncated input, and is exported through the package barrel. Tests cover commands, framing, field offsets, and batch decoding. ChangesUltrahuman protocol
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This adds experimental Ultrahuman command and recording decoding support with bounds and malformed-frame validation. Truncated or inconsistent recording responses are rejected rather than silently producing incomplete data, leaving no identified merge-blocking risk. Sequence Diagram(s)sequenceDiagram
participant Caller
participant parseUltrahumanResponse
participant parseUltrahumanRecords
Caller->>parseUltrahumanResponse: notification bytes
parseUltrahumanResponse-->>Caller: UltrahumanResponse payload
Caller->>parseUltrahumanRecords: response payload
parseUltrahumanRecords-->>Caller: decoded UltrahumanRecord list
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Hey - I've reviewed your changes and they look great!
Sourcery assessment
Needs a human reviewer. This adds an unvalidated wire-format API, including a command that can write an incorrect clock value to a ring and decoders that could produce wrong stored readings for downstream consumers. Reverting removes the API, but any clock value already sent or data already archived would need a corrective command or reprocessing.
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Actionable comments posted: 2
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Inline comments:
In `@lib/src/ultrahuman.dart`:
- Line 44: Validate inputs before encoding in _u16le and _u32le, rejecting
values outside their respective unsigned ranges instead of silently truncating
high bits. Ensure ultrahumanCmdGetRecordings rejects negative or over-16-bit
indices and ultrahumanCmdSetTime rejects values above the 32-bit maximum before
constructing frames.
- Line 97: Update parseUltrahumanRecords to validate successful 0x04 responses
before parsing: require count to be at most 7 and payloadLen to equal count
multiplied by kUltrahumanRecordLen, rejecting both truncated and extra payloads.
Preserve valid zero-record responses and add mismatch tests covering a short
payload, an extra payload byte, and count above seven.
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lib/openstrap_protocol.dartlib/src/ultrahuman.darttest/ultrahuman_test.dart
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_u16le/_u32le now throw on an out-of-range value instead of wrapping — a corrupted stored cursor no longer emits a wrong-but-valid-looking index. parseUltrahumanResponse now rejects an ok 0x04 reply whose count byte doesn't match its actual payload length, rather than handing back a response that silently decodes to fewer records than it claims.
1 participant
adds the Ultrahuman Ring Air wire format — plain command/response, no envelope. no field decode yet.
Summary by Sourcery
Add experimental plain command/response support for the Ultrahuman Ring Air protocol.
New Features:
Enhancements:
Tests:
Summary by CodeRabbit