# Payment Gateways

A payment gateway is a service that facilitates online payments by securely transmitting transaction data between a website or mobile app and the financial institution that processes the payment

**Go to Admin -> Payment Gateway Setting**

## Faq's

You get Payment Getaways error due to Check Currency Check Mail Settings and Currency Code.

All price and coupons create from eClass Admin Panel.\
**Payment Gateways not support $0 price it's need at least $1.**\
Don' Forget To **ENABLE** Payment Gateways After Enter Api.\
If Showing Error Check Currency Code In Multipal Currency.

{% hint style="warning" %}
**Note :** All your test complete then make Payment Gateway to live mode,  Payment Gateway Sandbox Mode user and price not support to live mode.
{% endhint %}

{% hint style="danger" %}
**Note:** All API keys are case-sensitive and don't give unwanted space before and after. After entering API Please Enable API.
{% endhint %}

## **Callback URL**

A Callback URL is a web address that an application or service is configured to send a request to after a specific event or action has occurred. In other words, a callback URL is a URL that is used to send a response back to the original application or service after some action has been completed. This is commonly used in web development and API integration.

For example, in a web application that allows users to log in with their social media accounts, the callback URL is the address that the social media platform redirects the user to after they have successfully logged in. The application can then use the information provided in the callback to log the user into the application.

Another example, when a user of a mobile application makes a purchase, the application sends a request to a payment gateway to complete the transaction. The payment gateway will then send a response to the callback URL specified by the application to confirm the status of the transaction.

Callback URLs are typically used in conjunction with webhooks and API calls, and are used to send and receive information in real-time. It's important to make sure that the callback URL is secure and that only authorized parties can access it.

