To better assist you with the integration, could you please provide the name of the payment gateway you are trying to integrate? Odoo supports numerous payment gateways, and knowing the specific one will help us offer more precise guidance. If your provider isn't supported by default, we may need to extend the payment module, which could require some customization.

Hi yuniel,

For Integrate payment gateway with your local bank, you need to follow the below approach to create a custom module and take care few things. 

1. Understanding the Architecture

You need to build a custom payment module that:

✅ Accepts payments via API keys (from an external payment gateway).

✅ Handles payment responses (success, failure, pending).

✅ Manages payments in the backend (transactions, refunds, reports).

✅ Provides an admin dashboard for tracking payments.

2. Tech Stack & Tools

🔹 Backend: Python (Django/Flask) / Node.js (Express/NestJS)

🔹 Frontend: React / Vue.js / Odoo frontend components

🔹 Database: PostgreSQL / MySQL (for payment records)

🔹 Payment APIs: Stripe, Paystack, Razorpay, Flutterwave, etc.

🔹 Security: OAuth, JWT, HTTPS, Webhooks

3. Steps to Develop a Custom Payment Module

Step 1: Define Database Models

Create tables to store payment transactions, API credentials, and responses.

Step 2: Create API Endpoints for Payment Handling

The backend should expose APIs for: 
✅ Initializing payments

✅ Handling payment callbacks (success/failure)

✅ Storing payment responses

✅ Refund processing

Step 3: Handle Payment Webhook Responses

Once a payment is completed, the payment gateway will send a webhook response to your system.

Step 4: Build an Admin Dashboard to Track Payments

Key Features:

✅ View all transactions (Pending, Successful, Failed)

✅ Filter payments by date, status, amount

✅ Search for specific transactions

✅ Process refunds manually

Step 5: Implement Refund Functionality

To allow refunds, create a refund API endpoint.

4. Security Best Practices

🔒 Secure API Keys: Never expose secret keys in frontend

🔒 Use HTTPS: Encrypt communication with payment APIs

🔒 Implement Authentication: Protect backend endpoints with JWT/OAuth

🔒 Validate Webhook Requests: Ensure incoming requests are from the payment gateway

5. Monitoring

📊 Monitor transactions using logs & dashboards

⚠️ Set up error notifications for failed payments

6. Summary

✅ Backend APIs to handle payments & store transactions

✅ Webhook integration to update payment status

✅ Admin dashboard for tracking transactions

✅ Refund processing for handling disputes

✅ Security measures to protect API keys & transactions

Thanks & Regards,
Sunny Sheth (shethsunny555@gmail.com)