This page outlines recommended practices for integrating with the Two-Coin API to ensure a secure, reliable, and user-friendly experience.
Security Best Practices
API Key Protection
Store API keys securely, never in client-side code
Implement key rotation procedures
Use environment variables or secure secret management solutions
Restrict API key access to only necessary personnel
Request Signing
Always sign requests correctly using the HMAC authentication method
Ensure accurate timestamp generation within 5 minutes of server time
Double-check that your signature generation matches the expected format
Webhook Security
Verify webhook signatures to confirm they're coming from Two-Coin
Use HTTPS for your webhook endpoint
Implement IP whitelisting if possible
Performance Optimization
Caching
Cache payment method responses for up to 24 hours
Don't cache offers (they expire quickly)
Cache static resources like images and descriptions
Important: Never cache offers as they typically expire after 2 minutes. Always fetch fresh offers when creating an order.
Rate Limiting
Implement exponential backoff for retry attempts
Monitor your API usage in the merchant dashboard
Spread out batch operations to avoid hitting rate limits
User Experience
Providing a seamless user experience is essential for successful cryptocurrency purchases. Follow these best practices:
Order Flow
Display clear instructions at each step of the purchase process
Show a countdown timer for offer expiration
Provide real-time feedback on order status
Display transaction details clearly, including fees and exchange rates
Error Communication
Translate API error codes into user-friendly messages
Provide clear instructions on how to resolve common issues
Implement fallback options when certain payment methods fail
Integration Testing
Thorough testing is crucial for a successful integration. We recommend:
Test all API endpoints in the test environment before going live
Verify webhook reception and processing
Test error scenarios to ensure proper handling
Conduct end-to-end testing of the entire purchase flow
Test with different payment methods and currencies
Implementation Checklist
Use this checklist to ensure you've implemented all necessary components:
Secure API key storage
HMAC authentication implementation
Webhook endpoint configuration
Webhook signature verification
Payment method selection UI
Offer comparison and selection UI
Order creation flow
Order status tracking
Comprehensive error handling
End-to-end testing
Pro Tip: Join our Telegram developer community at https://t.me/cs_2coin to get real-time support and share implementation best practices with other merchants.
If you encounter any issues or have questions not addressed in this documentation, please contact our support team on Telegram at https://t.me/cs_2coin (@cs_2coin).