oura + generic hrs wire format moved in from edge - #34
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they were pure decode functions living in edge with no BLE/db deps of their own, so they belong here with the rest of the bytes-in-records-out code, not next to the session that drives them. two renames to avoid a barrel collision: parseFrame -> parseOuraFrame, parseEvent -> parseOuraEvent (whoop already owns the bare names). AES-128/ecb auth-response encryption stays in edge, this package has zero runtime deps on purpose. tests moved with the code they pin.
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📝 WalkthroughWalkthroughThe package adds dependency-free Oura wire-format support and Bluetooth SIG Heart Rate Measurement parsing. It exports both APIs, updates package metadata, and adds captured-fixture and hand-derived protocol tests. ChangesProtocol API expansion
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The PR adds wire-format handling, but time synchronization currently fails on web targets and malformed heart-rate or authentication frames may be accepted or emitted. These bounded correctness and runtime issues should be fixed before merging. Sequence Diagram(s)sequenceDiagram
participant BLEClient
participant OuraDevice
participant parseOuraFrame
participant parseOuraEvent
OuraDevice->>BLEClient: length-prefixed notification
BLEClient->>parseOuraFrame: notification bytes
parseOuraFrame->>parseOuraEvent: OuraFrame
parseOuraEvent-->>BLEClient: OuraEvent
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Inline comments:
In `@lib/src/hrs.dart`:
- Around line 62-75: Update parseHeartRateMeasurement to validate optional
fields before consuming them: when the Energy Expended flag is set, return null
if fewer than two bytes remain, and return null when the RR interval remainder
has an odd length instead of silently stopping. Preserve normal parsing for
complete fields and update the trailing-byte test to expect null.
In `@lib/src/oura.dart`:
- Around line 327-328: Update ouraCmdAuthenticate to require exactly one
AES-block-sized cipher, matching the input-size validation used by
ouraCmdSetAuthKey, and reject invalid lengths before constructing the frame.
Preserve the existing frame layout for valid input.
- Around line 339-344: Update ouraCmdSyncTime to avoid ByteData.setUint64 by
encoding unixSeconds as lower and upper 32-bit halves with two little-endian
setUint32 calls at offsets 0 and 4, preserving the existing 9-byte command
layout and timezone byte.
In `@test/oura_confirmation_test.dart`:
- Around line 202-211: Update the test named “a real captured frame decodes
under the same field layout” to pass the literal captured bytes, including the
trailing 0300 bytes, directly to parseBatchSummary instead of constructing them
with batchFrame. Preserve the received and bytesLeft assertions so the test
validates decoding from the actual frame layout.
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lib/openstrap_protocol.dartlib/src/hrs.dartlib/src/oura.dartpubspec.yamltest/hrs_test.darttest/oura_confirmation_test.darttest/oura_test.dart
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… u64 parseHeartRateMeasurement accepted a notification that set the energy-expended or RR flag but didn't carry the field -- refuses now instead of silently walking past it, same for an odd-length RR remainder. ouraCmdAuthenticate had no length check on the cipher, so a wrong-size input either emitted a malformed frame or, past 254 bytes, overflowed the length byte. same guard ouraCmdSetAuthKey already has. ouraCmdSyncTime used ByteData.setUint64, which throws UnsupportedError on dart2js -- split into two little-endian setUint32 calls. plus one test that claimed to decode a real captured frame but actually just called the same encoder helper the decoder was being checked against, so it couldn't catch a field-offset bug. parses the literal bytes now.
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pairs with the same move on OpenStrap/edge — pulls the pure decode/encode functions for the oura ring and the generic bluetooth HR service in here since they don't touch BLE/db and belong with the rest of the bytes-in-records-out code.
renamed
parseFrame/parseEvent->parseOuraFrame/parseOuraEventso they don't collide with whoop's names in the shared barrel. auth-response AES encryption stays in edge (zero runtime deps here, on purpose).Summary by CodeRabbit
New Features
Tests