Project Overview
Zepto Digital Labs developed the Payment Checkout SDK, a powerful cross-platform library enabling businesses to embed our client's unified checkout experience within their mobile or web applications. The SDK supports real-time, secure payment processing with smart gateway routing and seamless fallback across payment providers.
Key SDK Variants
Flutter SDK
Built using flutter_inappwebview
Supports bidirectional communication (JavaScript ↔ Flutter)
Manages customer data, environments, and transaction lifecycle
GitHub sample app available
Native Android SDK
Developed in Kotlin (Java-compatible)
Secure WebView for checkout embedding
Handles URLs, intents, and session tokens
GitHub sample app available
Native iOS SDK
Written in Swift with Objective-C compatibility
Uses WKWebView for secure checkout
Delegate-based callbacks for completion and error tracking
Security Practices Implemented
All communications via HTTPS
No exposure of client_secret or sensitive keys on the client side
Server-side validation of payment responses
Sandbox mode support for development and QA testing
Supported Use Cases
E-commerce checkout flows
QR code / deep link payments
One-time & recurring billing
Smart fallback between gateways
Consistent user experience across platforms
Outcome
The SDK significantly simplifies mobile payment integration for merchants and app developers, enhancing reliability, security, and conversion rates across diverse transaction types and platforms.
Looking for a custom payment SDK, checkout solution, or secure API integration?
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