Fix #730: Implement Distributed Transaction Integrity & Vector-Clock …#733
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Renu-code123 merged 2 commits intoFeb 22, 2026
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Key Features Implemented:
Causal Versioning (Vector Clocks): Created
utils/vectorClockUtils.js
to manage multi-device version tracking. This allows the system to determine if one update is "after" another or if two updates happened "concurrently."
State Consensus Engine: Developed
services/consensusEngine.js
, the core logic that reconciles incoming states. It automatically applies causal updates and flags concurrent changes for manual resolution.
Conflict Graveyard: Created
models/SyncConflict.js
to store raw conflicting snapshots. This ensures that no data is ever silently overwritten when two devices edit the same transaction offline.
Integrity Checksumming: Implemented
utils/hashGenerator.js
to provide cryptographic certainty that data hasn't been corrupted or altered during the synchronization hop.
Multi-Device Interceptor: Built
middleware/syncInterceptor.js
to extract device identity and version headers (x-vector-clock) from incoming requests.
Soft-Merge Sync API: Updated
routes/sync.js
and
services/transactionService.js
to support reconciliation-aware updates. Clients now receive meaningful feedback (synced vs conflict) for every push.
Automated Maintenance: Created
jobs/conflictPruner.js
to clean up resolved conflict records older than 30 days, keeping the database healthy.
Technical Specification: Authored
CONSENSUS_ARCH.md
, documenting the vector clock math, reconciliation pipeline, and resolution strategies.
Verification Suite: Developed
tests/consensusEngine.test.js
which successfully validates causal precedence, detection of concurrent modification, and state merging.
Schema Resilience: Enhanced
models/Transaction.js
to support persistent vector clocks and synchronization metadata (checksums, conflict counters).
closes #730