v0 and 2Checkout (now Verifone) integration: Step-by-Step Guide 2025

 

Setting Up API Configuration

 

In your project’s source folder (for example, “src/”), create a new file called 2checkout.config.ts. This file stores your API credentials and configuration for 2Checkout (now Verifone).

export const TWOCHECKOUTCONFIG = {
  sellerId: 'yourSellerId',    // Replace with your actual seller ID
  secretKey: 'yourSecretKey',  // Replace with your actual secret key
  mode: 'sandbox'              // Change to 'production' when ready
};

 

Creating the Payment Integration Module

 

Next, create another file in your “src/” folder called 2checkout.ts. This file contains the functions that interact with 2Checkout’s API. As v0 projects do not have a terminal to install dependencies, we use the built-in fetch API for making HTTP requests.

import { TWOCHECKOUTCONFIG } from './2checkout.config';

export interface PaymentData {
  amount: number;
  currency: string;
  token: string;
  // Include any other required payment fields here
}

export async function initiatePayment(paymentData: PaymentData): Promise {
  // Construct the payload including API credentials and payment data
  const payload = {
    sellerId: TWOCHECKOUTCONFIG.sellerId,
    secretKey: TWOCHECKOUTCONFIG.secretKey,
    mode: TWOCHECKOUTCONFIG.mode,
    paymentDetails: paymentData
  };

  try {
    // Replace the URL with the correct endpoint from 2Checkout (sandbox or production)
    const response = await fetch('https://sandbox.2checkout.com/rest/6.0/charge', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify(payload)
    });

    if (!response.ok) {
      throw new Error('Network response was not ok');
    }
    const responseData = await response.json();
    return responseData;
  } catch (error) {
    throw new Error('Payment initiation failed: ' + (error as Error).message);
  }
}

 

Adding a Payment Endpoint in Your Main Server File

 

Open your main server file (for example, server.ts) and add an API endpoint to handle payment requests. This endpoint accepts payment data and calls the initiatePayment function from your integration module.

import express from 'express';
import { initiatePayment, PaymentData } from './2checkout';

const app = express();
app.use(express.json());

// Payment endpoint: accepts POST requests with payment information
app.post('/api/payment', async (req, res) => {
  try {
    const paymentData: PaymentData = req.body;
    const paymentResponse = await initiatePayment(paymentData);
    res.json(paymentResponse);
  } catch (error) {
    res.status(500).json({ error: 'Payment failed', details: (error as Error).message });
  }
});

// Start the server on the desired port
app.listen(3000, () => {
  console.log('Server started on port 3000');
});

 

Configuring Your Project Without a Terminal

 

Since the v0 environment does not support a terminal for dependency installations, ensure you have the necessary packages available in your project. If your project already includes Express and uses TypeScript, add the following code snippet at the top of your server.ts or in a separate configuration file to simulate installing node packages manually. Note that in v0, dependencies are often managed by adding the relevant files in your project:

// Ensure that express is imported. In case it is not available, add the express library files 
// manually to your project and reference them accordingly.
// For example, include express.d.ts and express.js in your project if needed.

 

Testing the Payment Integration

 

Once you have added the above files and code snippets to your project:

// Trigger a POST request to /api/payment with payment data. For example, use the following JSON payload:
{
  "amount": 100,
  "currency": "USD",
  "token": "sampletokenvalue"
}

You can test the integration by sending a request from your front-end code or using a tool that can make HTTP requests. The API endpoint will call the initiatePayment function and return the response from 2Checkout’s API.

 

Final Notes

 

Ensure that you replace placeholder values such as sellerId, secretKey, and the API URL with your actual details from your 2Checkout (Verifone) account. With these changes, your v0 project will now be integrated to handle payment processing via 2Checkout.