Data Flow

Offline-First POS Synchronization Flow

Data Flow Diagrams (DFD) · made in Skemio

Data flow diagram illustrating local checkout caching, reconnection detection, batch transaction syncing, and central ledger inventory updating.
Data flow diagram illustrating local checkout caching, reconnection detection, batch transaction syncing, and central ledger inventory updating.
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What it shows

  • Local SQLite cache writes receipts instantly with monotonic sequence IDs
  • Reconnection workers batch unsynced receipts with idempotency keys
  • Conflict detection reconciles inventory decrements across multiple terminals

The takeaway

Local-first writes plus idempotent reconciliation enable resilient retail operations.

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