integrate a payment gateway

Version: August 13 , 2025 Mohammed Taha Khamed
التبديل إلى العربية
1

Introduction

The goal is to integrate an online payment gateway into the existing system/website, along with building APIs to handle payment operations securely and reliably.

Integration Objectives :

  • Enable customers to pay online directly.
  • Connect the internal system with the payment gateway to track transaction status.
  • Automate the reception of payment notifications (Webhook).
  • Improve user experience and reduce manual errors.

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2

Scope of Work

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  • Analyzing payment gateway requirements and selecting the most suitable option (Chargily / Stripe ).
  • Setting up API keys and configuring the sandbox (test) environment.
  • Developing a Checkout API to initiate payment requests.
  • Creating a Webhook listener to receive payment status updates.
  • Storing transaction logs in the database.
  • Handling different payment states (success, failed, canceled).
  • Preparing technical documentation (API Docs) using Swagger
3

Selected Gateway Specifications

Chargily Pay [ Cib / Edahabia ] : https://chargily.com/business/pay

Stripe [ Cards ]  : https://stripe.com/en-ch/payments


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  • Supported Currency : Algerian Dinar (DZD) / VISA Cards .
  • Payment Methods : CIB, Edahabia , VISA .
  • Fees : As per gateway pricing.
  • Notification Mechanism : Webhook with security signature.
  • Testing Environment : Dedicated sandbox URL + test API keys.
4

Support Plan

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  • Free technical support for 10 days after delivery.
  • Optional monthly support plan (SLA).
5

Pre-launch Checklist

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  • Test all payment flows in sandbox mode.
  • Verify Webhook reception.
  • Validate security signature.
  • Ensure transaction logs are stored in the database.
  • Simulate failure and cancellation scenarios.
6

Gateway Account Setup & Configuration

This section covers the steps required to prepare and configure the payment gateway account before integration

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  • Merchant Account Creation : Guide the client through creating an account with the selected payment gateway.
  • Verification Process: Assist in completing KYC (Know Your Customer) and identity verification requirements.
  • API Keys & Credentials: Generate and securely store public/private keys and secret tokens.
  • Sandbox Environment: Enable and configure the testing (sandbox) account for trial transactions.
  • Payment Methods Configuration: Activate and set up supported payment methods (e.g., credit card, CIB, Edahabia).
  • Webhook URL Registration: Register the system's Webhook endpoint in the gateway dashboard.
  • Security Settings: Configure IP whitelisting, signature verification, and other security measures.
  • Live Mode Activation: Assist in switching from sandbox to live environment after successful testing.

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