dailygr1nd/AviaPOS-Module

AviaPOS is a lightweight, modular, offline-capable merchant operating system designed for African SMEs. The platform focuses on four core merchant needs: secure payment collection, inventory management, debt and credit tracking, and business visibility. # AviaPOS Architecture ## What AviaPOS Is AviaPOS is a Merchant Operating System designed for African SMEs. It is intentionally not an ERP. The platform focuses on four core merchant activities: 1. Sales 2. Inventory 3. Expenses 4. Receivables These four domains provide the majority of operational visibility required by small and medium businesses. --- ## Architectural Principles ### Event-First Business actions generate immutable events. Examples: - Sale Created - Inventory Received - Expense Recorded - Debt Created Events become the source of truth. --- ### PostgreSQL as System of Record PostgreSQL stores: - Event Store - Snapshots - Projections - Merchant Metadata The database is the authoritative ledger. --- ### Redis as Event Transport Redis Streams distribute events to workers. This enables: - Asynchronous projections - Background processing - Future RailOne integration - Horizontal scaling --- ### Offline First AviaPOS is designed to operate in environments with unreliable connectivity. Future mobile clients maintain a local event store and synchronize business events when connectivity becomes available. Synchronization is event-based rather than state-based. --- ### Snapshot-Based Recovery Aggregates are periodically snapshotted. Recovery flow: Snapshot → Load State → Replay Remaining Events instead of replaying the entire event history. --- ### RailOne Compatibility AviaPOS is designed to integrate with RailOne without custody of customer funds. AviaPOS produces business events. RailOne handles routing, settlement, liquidity visibility, and payment orchestration. ## Core Business Domains AviaPOS intentionally focuses on four merchant domains: ### Sales Tracks money entering the business. ### Inventory Tracks stock movement and inventory valuation. ### Expenses Tracks money leaving the business. ### Receivables Tracks money owed to the business. Together these provide a complete operational picture for most …