How to Integrate eProcessing Network Payment Gateway with Magento 2

Magento 2 provides a powerful eCommerce platform for businesses that need flexible payment solutions. However, integrating a specific payment gateway such as eProcessing Network (ePN) requires a dedicated payment extension that can connect Magento checkout with the gateway API securely and reliably.

eProcessing Network Magento 2 integration allows merchants to accept credit card payments directly on their Magento store while supporting essential payment operations such as authorization, capture, void, and refund.

In this guide, we will explain how to integrate eProcessing Network Payment Gateway with Magento 2, how the payment flow works, and what features a Magento 2 ePN extension should provide for a professional implementation.

What is eProcessing Network Payment Gateway?

eProcessing Network (ePN) is an online payment gateway that enables merchants to process credit card transactions securely through their eCommerce websites.

The gateway provides API-based payment processing capabilities, allowing Magento stores to communicate directly with the payment provider for transaction processing.

Typical eProcessing Network transactions include:

• Credit card authorization
• Payment capture
• Transaction cancellation
• Refund processing
• Transaction status checking

For Magento 2 merchants, integrating eProcessing Network provides an alternative payment solution for businesses that require a direct credit card payment method.

Why Integrate eProcessing Network with Magento 2?

Magento 2 supports many payment methods, but merchants often need a payment gateway that matches their business requirements, including:

• Existing merchant account compatibility
• Lower transaction fees
• Direct credit card processing
• Custom payment workflows
• Better control over transaction management

An eProcessing Network Magento 2 extension helps merchants connect their Magento checkout system with ePN without building the entire payment integration from scratch.

Accept Credit Card Payments Directly

Customers can enter their card information during checkout and complete payment without leaving the Magento store.

This creates a smoother checkout experience and can reduce cart abandonment.

Support Magento Payment Operations

A complete ePN Magento 2 integration should support Magento's standard payment workflow:

• Authorize
• Capture
• Void
• Refund

This allows store administrators to manage transactions directly from Magento Admin.

Secure Payment Processing

A professional Magento 2 payment gateway integration should follow Magento security standards:

• Secure API communication
• Encrypted payment requests
• No unnecessary storage of sensitive card information
• Proper transaction validation

How Does Magento 2 eProcessing Network Integration Work?

The payment flow usually follows these steps:

Customer places order
        |
        ↓
Magento 2 Checkout
        |
        ↓
eProcessing Network Payment Extension
        |
        ↓
ePN API Request
        |
        ↓
Payment Gateway Processing
        |
        ↓
Transaction Response
        |
        ↓
Magento Order Update

The extension acts as a bridge between Magento 2 and the eProcessing Network API.

Magento 2 eProcessing Network Integration Methods

There are several possible approaches when integrating ePN with Magento 2.

Direct API Integration

With direct API integration, Magento communicates directly with eProcessing Network.

The process:

1. Customer enters payment information.
2. Magento creates a transaction request.
3. The extension sends the request to ePN API.
4. ePN processes the payment.
5. Magento receives the transaction response.
6. Order status is updated.

Advantages:

• Better checkout experience
• Customer remains on the store website
• Full control over transaction handling

Redirect Payment Integration

Another approach is redirect-based payment.

The customer is redirected to an external payment page hosted by the payment provider.

Advantages:

• Easier PCI compliance management
• Less sensitive payment data handled by the website

Disadvantages:

• Additional checkout step
• Less control over user experience

Installing eProcessing Network Magento 2 Extension

Before installation, make sure your Magento environment meets the requirements:

• Magento 2.x
• Supported PHP version
• Active eProcessing Network merchant account
• API credentials

Upload Extension Files

Copy the extension files into:

app/code/

Example Magento module structure:

app/code/Polacin/EprocessingNetwork/

Enable Magento Module

php bin/magento module:enable Polacin_EprocessingNetwork

Upgrade Magento Database

php bin/magento setup:upgrade

Compile Magento Dependency Injection

php bin/magento setup:di:compile

Clear Magento Cache

php bin/magento cache:flush

Configuring eProcessing Network in Magento 2

Navigate to:

Magento Admin
→ Stores
→ Configuration
→ Sales
→ Payment Methods

Locate:

eProcessing Network Payment Gateway

Enable Payment Method

Set:

Enabled = Yes

Configure API Credentials

Enter:

• Merchant ID
• Username
• Transaction Key
• API credentials provided by eProcessing Network

Transaction Mode

Authorize Only

Magento sends authorization requests. Payment capture happens later.

Suitable for:

• Custom fulfillment workflows
• Physical products requiring manual review

Authorize and Capture

Payment is captured immediately.

Suitable for:

• Standard online stores
• Digital products

Testing eProcessing Network Magento 2 Integration

Before launching, merchants should test all transaction scenarios.

Test Authorization

• Verify transaction request is accepted
• Check order creation
• Confirm payment status updates correctly

Test Capture

• Invoice creation
• Captured amount
• Transaction record

Test Refund

• Refund request reaches ePN
• Magento updates order status
• Credit memo works correctly

Common eProcessing Network Magento 2 Integration Issues

Payment Transaction Failed

Possible causes:

• Incorrect API credentials
• Invalid merchant account configuration
• API communication issue

Solutions:

• Verify ePN account settings
• Check Magento logs
• Test API credentials

Order Created but Payment Failed

Possible causes:

• Incorrect response handling
• Transaction validation problem

Review Magento payment logs and gateway responses to identify the issue.

Refund Not Working

Possible causes:

• Extension does not implement refund command
• Gateway API permission issue

A complete Magento 2 ePN extension should support Magento refund workflow.

Choosing the Right eProcessing Network Magento 2 Extension

When selecting an ePN integration solution, merchants should consider:

Magento Payment Gateway Compatibility

The extension should follow Magento 2 payment architecture instead of using a custom checkout workaround.

Transaction Management

Important features include:

• Authorization
• Capture
• Refund
• Void
• Transaction history

Multi-store Support

Magento merchants running multiple stores need a payment solution that supports Magento multi-store configuration.

eProcessing Network Magento 2 Extension by Polacin

Polacin provides an eProcessing Network Payment Gateway extension for Magento 2 that helps merchants integrate ePN payment processing into their Magento stores.

Learn more about the extension:

eProcessing Network Payment Gateway Magento 2 Extension

• Magento 2 native payment integration
• Credit card payment processing
• Authorization and capture support
• Refund support
• Secure API communication
• Multi-store compatibility