Smarts allows to scan products and pay for them by using mobile app.
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General Flow
Customer scans store's QR code with Smarts app to start shopping
Customer will add products to shopping cart by scanning SKU or searching it from product catalog
Customer will pay for the purchase by scanning QR code at the store exit.
Integration
Smarts is communicating with merchant through restful API-s. It is required to create API endpoints in the merchant side to establish communication between the Smarts and merchant.