[Vela OTA] Sub-Issue 11: Delta update engine — binary diff/patch#207
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May 19, 2026 18:09
…ation (#199) - Add vela-e2e integration test crate with 6 test suites (55 tests) - Suite 1: Watchdog + EventBus — event emission, subscribers, history - Suite 2: Slot Manager + Lifecycle — transitions, metrics, terminal states - Suite 3: Hub Client + Retry + Download — retry exhaustion, checksum, auth - Suite 4: Full Pipeline — phase order, terminal states, config - Suite 5: Error Recovery — space errors, retry behavior, fallback path - Suite 6: Configuration — defaults, custom configs, error conversions - Add SlotManager + SlotLabel types to vela-slotmgr - Fix 40+ pre-existing compilation errors across workspace crates - Fix dependency versions (x509-cert, csbindgen, hmac, ring compat) - Fix platform compatibility (watchdog on Windows via cfg guards) - Fix API mismatches in orchestrator, hub client, download, flashpack
…202) - Add vela-delta crate with sliding-window block-matching algorithm - Binary diff generator: generate_delta(old, new) -> DeltaResult<Vec<u8>> - Patch applier: apply_patch(base, delta) -> DeltaResult<Vec<u8>> - DeltaManifest format for .fpk delta.manifest metadata - VDLT magic header with SHA-256 integrity verification - 19 unit tests including roundtrip, hash verification, edge cases - Integrates with FlashPack PayloadType::Delta
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Sub-Issue 11: Delta Update Engine
Implement a binary delta engine that enables efficient incremental updates
by transmitting only the changed bytes between versions.
Design
Vela Delta is a standalone crate (
vela-delta) in the vela-core workspace:API
generate_delta(old: &[u8], new: &[u8]) -> DeltaResult<Vec<u8>>apply_patch(base: &[u8], patch: &[u8]) -> DeltaResult<Vec<u8>>DeltaManifest— metadata for delta bundlesIntegration with FlashPack
PayloadType::Deltawhen building delta FlashPacksdelta.manifestin the .fpk tar archiverequires_versionin FpkHeader