pretix-gpwebpay 7.0.2

GPWebPay payment provider for Pretix

# GPWebPay Payment Provider for Pretix

A fully functional payment gateway plugin for Pretix that integrates with GPWebPay payment system.

## Features

• Full GPWebPay integration with PKI-based message signing

• Secure payment processing with RSA-SHA256 signatures

• Support for multiple currencies (CZK, EUR, USD, GBP, PLN, HUF)

• Server-to-server notifications (IPN)

• User redirect handling

• Test mode support

• Proper error handling and logging

## Installation

1. Install the plugin in your Pretix environment:

`bash pip install -e /path/to/pretix-gpwebpay `

2. Add the plugin to your Pretix configuration (pretix.cfg):

`ini [pretix] plugins = pretix_gpwebpay `

3. Restart your Pretix instance.

## Configuration

1. Go to your event’s payment settings in the Pretix control panel.

2. Enable the GPWebPay payment provider.

3. Configure the following settings:

   • Merchant Number: Your GPWebPay merchant number

   • Private Key File: Upload your GPWebPay private key file (.key or .pem format)

   • Private Key Password: Password for your private key (if required)

   • GPWebPay Public Key File: Upload GPWebPay’s public key for signature verification

   • Gateway URL: GPWebPay gateway URL - Production: https://3dsecure.gpwebpay.com/pgw/order.do - Test: Use the test gateway URL provided by GPWebPay

   • Test Mode: Enable for testing

## Requirements

• Pretix >= 4.0.0

• Python >= 3.8

• cryptography >= 3.0.0

## Security

This plugin implements GPWebPay’s security requirements:

• All payment requests are signed using RSA-SHA256 with your private key

• All payment responses are verified using GPWebPay’s public key

• Private keys are stored securely in Pretix’s configuration

• Message integrity is verified for all transactions

## How It Works

1. Payment Initiation: When a customer selects GPWebPay, they are redirected to the GPWebPay gateway with a signed payment request.

2. Payment Processing: The customer completes payment on GPWebPay’s secure gateway.

3. Return Handling: After payment, the customer is redirected back to your Pretix instance, where the payment status is verified using GPWebPay’s signature.

4. Server Notification: GPWebPay also sends a server-to-server notification to confirm the payment status.

## Supported Currencies

• CZK (Czech Koruna) - Code: 203

• EUR (Euro) - Code: 978

• USD (US Dollar) - Code: 840

• GBP (British Pound) - Code: 826

• PLN (Polish Zloty) - Code: 985

• HUF (Hungarian Forint) - Code: 348

## Development

### Project Structure

` pretix_gpwebpay/ ├── __init__.py # Plugin metadata ├── apps.py # Django app configuration ├── signals.py # Plugin registration ├── payment.py # Payment provider implementation ├── views.py # Return and notification handlers ├── urls.py # URL routing └── locale/ # Translations `

### Testing

1. Configure test mode in the plugin settings

2. Use GPWebPay test credentials

3. Test payment flow end-to-end

4. Verify signature generation and verification

## Troubleshooting

### Payment Not Processing

• Verify your merchant number is correct

• Check that private and public keys are properly uploaded

• Ensure the gateway URL is correct for your environment (test/production)

• Check Pretix logs for detailed error messages

### Signature Verification Failures

• Verify you’re using the correct public key from GPWebPay

• Ensure private key password is correct (if required)

• Check that key files are in the correct format (PEM)

### Currency Issues

• Verify your currency is supported

• Check that currency codes match GPWebPay’s requirements

## License

Apache Software License 2.0

## Support

For issues related to: - Plugin functionality: Check the Pretix documentation and plugin development guide - GPWebPay integration: Refer to GPWebPay’s integration documentation - Payment processing: Contact GPWebPay support

## References

• [Pretix Plugin Development Guide](https://docs.pretix.eu/dev/development/api/index.html)

• [GPWebPay HTTP API Documentation](GP_webpay_HTTP_API_v1.19_EN.pdf)

• [GPWebPay Private Key Management](GP_webpay_Private_key_management_EN.pdf)