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server.js
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459 lines (428 loc) · 13.1 KB
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require("dotenv").config();
const express = require("express");
const axios = require("axios");
// Initialize express app
const app = express();
const PORT = process.env.PORT || 3000;
// Middleware for parsing JSON bodies
app.use(express.json());
// Serve static files
app.use(express.static("public"));
// Health check endpoint
app.get("/", (req, res) => {
res.status(200).json({ status: true, message: "Server is running" });
});
// Initialize Transaction endpoint
app.post("/initialize-transaction", async (req, res) => {
try {
// Validate request body
const { amount, email } = req.body;
if (!amount || !email) {
return res.status(400).json({
status: false,
message: "Both amount and email are required",
});
}
// Ensure amount is a number
if (isNaN(parseFloat(amount))) {
return res.status(400).json({
status: false,
message: "Amount must be a valid number",
});
}
// Validate email format using a simple regex
const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
if (!emailRegex.test(email)) {
return res.status(400).json({
status: false,
message: "Please provide a valid email address",
});
}
// Initialize transaction with Paystack API
const response = await axios.post(
"https://api.paystack.co/preauthorization/initialize",
{
amount: parseFloat(amount) * 100, // Convert to kobo/cents
email,
currency: "ZAR",
...req.body
},
{
headers: {
Authorization: `Bearer ${process.env.PAYSTACK_SECRET_KEY}`,
"Content-Type": "application/json",
},
}
);
// Return the authorization URL and reference
return res.status(200).json({
status: true,
data: {
authorization_url: response.data.data.authorization_url,
reference: response.data.data.reference,
},
});
} catch (error) {
console.error(
"Error initializing transaction:",
error.response?.data || error.message
);
// Return client-friendly error response
return res.status(error.response?.status || 500).json({
status: false,
message:
error.response?.data?.message || "Error initializing transaction",
data: null,
});
}
});
// Transaction Callback route
app.get("/callback", async (req, res) => {
try {
// Get transaction reference from query parameters
const { reference } = req.query;
if (!reference) {
return res.status(400).send(`
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Transaction Failed</title>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
max-width: 600px;
margin: 0 auto;
padding: 20px;
text-align: center;
}
.error-container {
background-color: #fff8f8;
border: 1px solid #f5c6cb;
border-radius: 8px;
padding: 20px;
margin-top: 30px;
}
h1 {
color: #dc3545;
}
.btn {
display: inline-block;
background-color: #007bff;
color: white;
text-decoration: none;
padding: 10px 20px;
border-radius: 4px;
margin-top: 20px;
}
</style>
</head>
<body>
<div class="error-container">
<h1>Error</h1>
<p>Transaction reference is missing. Unable to verify payment status.</p>
<a href="javascript:history.back()" class="btn">Go Back</a>
</div>
</body>
</html>
`);
}
// Verify transaction with Paystack API
const response = await axios.get(
`https://api.paystack.co/transaction/verify/${encodeURIComponent(
reference
)}`,
{
headers: {
Authorization: `Bearer ${process.env.PAYSTACK_SECRET_KEY}`,
"Content-Type": "application/json",
},
}
);
const { data } = response.data;
const isSuccessful = data.status === "success";
// Format amount from kobo/cents to main currency
const formattedAmount = new Intl.NumberFormat("en-NG", {
style: "currency",
currency: data.currency || "NGN",
}).format(data.amount / 100);
// Return HTML response based on transaction status
if (isSuccessful) {
return res.status(200).send(`
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Payment Successful</title>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
max-width: 600px;
margin: 0 auto;
padding: 20px;
text-align: center;
}
.success-container {
background-color: #f8fff9;
border: 1px solid #c3e6cb;
border-radius: 8px;
padding: 20px;
margin-top: 30px;
}
h1 {
color: #28a745;
}
.details {
text-align: left;
margin: 20px 0;
background: #f9f9f9;
padding: 15px;
border-radius: 4px;
}
.detail-row {
margin-bottom: 10px;
}
.btn {
display: inline-block;
background-color: #28a745;
color: white;
text-decoration: none;
padding: 10px 20px;
border-radius: 4px;
margin-top: 20px;
}
.reference {
font-family: monospace;
background: #f0f0f0;
padding: 5px;
border-radius: 3px;
}
</style>
</head>
<body>
<div class="success-container">
<h1>Payment Successful</h1>
<p>Your transaction has been completed successfully.</p>
<div class="details">
<div class="detail-row"><strong>Amount:</strong> ${formattedAmount}</div>
<div class="detail-row"><strong>Email:</strong> ${
data.customer.email
}</div>
<div class="detail-row"><strong>Transaction Reference:</strong> <span class="reference">${
data.reference
}</span></div>
<div class="detail-row"><strong>Payment Method:</strong> ${
data.channel || "Card"
}</div>
<div class="detail-row"><strong>Date:</strong> ${new Date(
data.paid_at
).toLocaleString()}</div>
</div>
<p>Thank you for your payment!</p>
<a href="javascript:window.close()" class="btn">Close</a>
</div>
</body>
</html>
`);
} else {
return res.status(200).send(`
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Payment Failed</title>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
max-width: 600px;
margin: 0 auto;
padding: 20px;
text-align: center;
}
.failed-container {
background-color: #fff8f8;
border: 1px solid #f5c6cb;
border-radius: 8px;
padding: 20px;
margin-top: 30px;
}
h1 {
color: #dc3545;
}
.details {
text-align: left;
margin: 20px 0;
background: #f9f9f9;
padding: 15px;
border-radius: 4px;
}
.detail-row {
margin-bottom: 10px;
}
.btn {
display: inline-block;
background-color: #dc3545;
color: white;
text-decoration: none;
padding: 10px 20px;
border-radius: 4px;
margin-top: 20px;
}
.reference {
font-family: monospace;
background: #f0f0f0;
padding: 5px;
border-radius: 3px;
}
</style>
</head>
<body>
<div class="failed-container">
<h1>Payment Failed</h1>
<p>Your transaction could not be completed.</p>
<div class="details">
<div class="detail-row"><strong>Reference:</strong> <span class="reference">${
data.reference
}</span></div>
<div class="detail-row"><strong>Status:</strong> ${
data.status
}</div>
<div class="detail-row"><strong>Gateway Response:</strong> ${
data.gateway_response || "Unknown error"
}</div>
</div>
<p>Please try again or contact support if the problem persists.</p>
<a href="javascript:history.back()" class="btn">Try Again</a>
</div>
</body>
</html>
`);
}
} catch (error) {
console.error(
"Error verifying transaction:",
error.response?.data || error.message
);
// Return error HTML page
return res.status(error.response?.status || 500).send(`
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Verification Error</title>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
max-width: 600px;
margin: 0 auto;
padding: 20px;
text-align: center;
}
.error-container {
background-color: #fff8f8;
border: 1px solid #f5c6cb;
border-radius: 8px;
padding: 20px;
margin-top: 30px;
}
h1 {
color: #dc3545;
}
.message {
background: #f9f9f9;
padding: 15px;
border-radius: 4px;
margin: 20px 0;
text-align: left;
}
.btn {
display: inline-block;
background-color: #6c757d;
color: white;
text-decoration: none;
padding: 10px 20px;
border-radius: 4px;
margin-top: 20px;
}
</style>
</head>
<body>
<div class="error-container">
<h1>Verification Error</h1>
<p>We couldn't verify your payment status at this time.</p>
<div class="message">
<strong>Error:</strong> ${
error.response?.data?.message ||
error.message ||
"Unknown error occurred"
}
</div>
<p>Please contact support with your transaction reference.</p>
<a href="javascript:history.back()" class="btn">Go Back</a>
</div>
</body>
</html>
`);
}
});
app.get("/verify", async (req, res) => {
const { reference } = req.query;
if (!reference) {
return res.status(400).json({
status: false,
message: "Transaction reference is required",
});
}
try {
const response = await axios.get(
`https://api.paystack.co/transaction/verify/${encodeURIComponent(
reference
)}`,
{
headers: {
Authorization: `Bearer ${process.env.PAYSTACK_SECRET_KEY}`,
"Content-Type": "application/json",
},
}
);
const data = response.data.data;
return res.status(200).json({
status: true,
data: {
reference: data.reference,
amount: data.amount,
currency: data.currency,
email: data.customer?.email,
channel: data.channel,
paid_at: data.paid_at,
gateway_response: data.gateway_response,
},
});
} catch (error) {
console.error(
"Error verifying transaction:",
error.response?.data || error.message
);
return res.status(error.response?.status || 500).json({
status: false,
message: "Error verifying transaction",
error: error.response?.data || error.message,
});
}
});
// Start the server
app.listen(PORT, () => {
console.log(`Server running on http://localhost:${PORT}`);
});