Eppay Crypto Payment Gateway Documentation

Introduction

Eppay is a secure crypto payment gateway that allows users to send and receive payments in USDT across multiple blockchain networks. This documentation serves as a guide for users and developers integrating Eppay into their applications.

For Individual Users

• Create a payment with your desired amount of USDT on our platform.
• Receive a QR code for the payment and scan it using the Eppay mobile app or any compatible crypto wallet.
• Confirm the transaction to complete the payment instantly on the blockchain.

For Developers

Developers can integrate Eppay's payment system into their applications using the following steps:

• Create a product or service requiring payment.
• Send a POST request to the API to create a payment and retrieve the paymentId.
• Convert the paymentId into a QR code and display it on the product or service for payment.
• Receive payment success notifications at the callback URL provided in the request.

API Integration

POST https://eppay.io/generate-code
Content-Type: application/json

{
    "apiKey": "WlJSciIhgHkUzduirHj2AqIwxFTEvVGN",
    "amount": "1",
    "to": "0x8AB960B95aCCc5080c15721fdeA30e72C8251F0b",
    "rpc": "https://chain.scimatic.net",
    "token": "0x65C4A0dA0416d1262DbC04BeE524c804205B92e8",
    "success": "https://eppay.io/payment-success"
}
                

Response

Upon a successful request, the server responds with a JSON object containing a paymentId:

{
    "paymentId": "8a020135-19b7-42df-be4b-1a8722ad0570"
}
                

This paymentId should be converted to a QR code and displayed on the product or service to allow the user to complete the payment.

QR Code Payment Flow

Use the paymentId to generate a QR code. Users scan the QR code with their wallet or Eppay app to complete the transaction.

Callback Response

Once the payment is successful, the server sends a response to the success URL provided in the API request:

{
    "success": "success",
    "message": "Payment updated successfully"
}
                

Supported Networks

• Binance Smart Chain
• Scimatic Network
• Avalanche
• Polygon (Matic)
• Ethereum

API Call Examples

PHP Example

$apiUrl = 'https://eppay.io/generate-code';
$data = [
    "apiKey" => "WlJSciIhgHkUzduirHj2AqIwxFTEvVGN",
    "amount" => "1",
    "to" => "0x8AB960B95aCCc5080c15721fdeA30e72C8251F0b",
    "rpc" => "https://chain.scimatic.net",
    "token" => "0x65C4A0dA0416d1262DbC04BeE524c804205B92e8",
    "success" => "https://eppay.io/payment-success"
];
$options = [
    'http' => [
        'header'  => "Content-Type: application/json\r\n",
        'method'  => 'POST',
        'content' => json_encode($data),
    ],
];
$context  = stream_context_create($options);
$response = file_get_contents($apiUrl, false, $context);
echo $response;

                

JavaScript Example

const apiUrl = 'https://eppay.io/generate-code';
const data = {
    apiKey: "WlJSciIhgHkUzduirHj2AqIwxFTEvVGN",
    amount: "1",
    to: "0x8AB960B95aCCc5080c15721fdeA30e72C8251F0b",
    rpc: "https://chain.scimatic.net",
    token: "0x65C4A0dA0416d1262DbC04BeE524c804205B92e8",
    success: "https://eppay.io/payment-success"
};

fetch(apiUrl, {
    method: 'POST',
    headers: {
        'Content-Type': 'application/json'
    },
    body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => {
    console.log('Payment ID:', data.paymentId);
    // Generate and display the QR code
})
.catch(error => console.error('Error:', error));
                

Python Example

import requests
import json

api_url = 'https://eppay.io/generate-code'
data = {
    "apiKey": "WlJSciIhgHkUzduirHj2AqIwxFTEvVGN",
    "amount": "1",
    "to": "0x8AB960B95aCCc5080c15721fdeA30e72C8251F0b",
    "rpc": "https://chain.scimatic.net",
    "token": "0x65C4A0dA0416d1262DbC04BeE524c804205B92e8",
    "success": "https://eppay.io/payment-success"
}

response = requests.post(api_url, json=data)
if response.status_code == 200:
    payment_id = response.json().get('paymentId')
    print('Payment ID:', payment_id)
    # Generate and display the QR code
else:
    print('Error:', response.json())
                

Get Started

• Sign up for an account.
• Create a product or service for payment.
• Integrate the Eppay API to generate payment IDs and handle payment confirmations.