<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Payment Required</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 1rem;
}
.container {
background: white;
border-radius: 16px;
box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
padding: 2.5rem;
max-width: 480px;
width: 100%;
text-align: center;
position: relative;
overflow: hidden;
}
.container::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
height: 4px;
background: linear-gradient(90deg, #667eea, #764ba2);
}
.logo {
width: 80px;
height: 80px;
margin: 0 auto 1.5rem;
background: linear-gradient(135deg, #667eea, #764ba2);
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-size: 32px;
color: white;
box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}
h1 {
color: #1a1a1a;
margin-bottom: 0.5rem;
font-size: 1.75rem;
font-weight: 700;
}
.subtitle {
color: #666;
margin-bottom: 2rem;
line-height: 1.6;
font-size: 1rem;
}
.payment-info {
background: #f8f9fa;
border: 1px solid #e9ecef;
border-radius: 12px;
padding: 1.5rem;
margin: 1.5rem 0;
text-align: left;
}
.payment-row {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 0.75rem;
padding: 0.5rem 0;
}
.payment-row:last-child {
margin-bottom: 0;
border-top: 1px solid #e9ecef;
padding-top: 0.75rem;
margin-top: 0.75rem;
}
.label {
color: #666;
font-weight: 500;
font-size: 0.9rem;
}
.value {
color: #1a1a1a;
font-weight: 600;
font-size: 0.9rem;
}
.amount {
font-size: 1.1rem;
color: #667eea;
}
.error {
background: #fee;
color: #dc3545;
padding: 1rem;
border-radius: 8px;
margin: 1.5rem 0;
border-left: 4px solid #dc3545;
font-size: 0.9rem;
}
.instructions {
background: #e3f2fd;
color: #1976d2;
padding: 1rem;
border-radius: 8px;
margin: 1.5rem 0;
font-size: 0.9rem;
line-height: 1.5;
}
.instructions strong {
display: block;
margin-bottom: 0.5rem;
}
.instructions a {
color: #1976d2;
text-decoration: none;
font-weight: 600;
}
.instructions a:hover {
text-decoration: underline;
}
.testnet-info {
background: #fff3cd;
color: #856404;
padding: 1rem;
border-radius: 8px;
margin: 1rem 0;
font-size: 0.9rem;
}
.testnet-info a {
color: #856404;
text-decoration: none;
font-weight: 600;
}
.testnet-info a:hover {
text-decoration: underline;
}
.status {
margin-top: 1rem;
padding: 0.75rem;
border-radius: 6px;
font-size: 0.9rem;
font-weight: 500;
}
.status.loading {
background: #e3f2fd;
color: #1976d2;
}
.status.success {
background: #d4edda;
color: #155724;
}
.status.error {
background: #f8d7da;
color: #721c24;
}
@media (max-width: 480px) {
.container {
padding: 1.5rem;
margin: 0.5rem;
}
.logo {
width: 64px;
height: 64px;
font-size: 24px;
}
h1 {
font-size: 1.5rem;
}
}
</style>
</head>
<body>
<div class="container">
<div class="logo">💰</div>
<h1>Payment Required</h1>
<div class="subtitle">
This resource requires payment to access. Please provide a valid X-PAYMENT header.
</div>
<div id="payment-details" class="payment-info" style="display: none;">
<div class="payment-row">
<span class="label">Amount:</span>
<span class="value amount" id="amount">$0.00 USDC</span>
</div>
<div class="payment-row">
<span class="label">Network:</span>
<span class="value" id="network">Base Sepolia</span>
</div>
<div class="payment-row">
<span class="label">Description:</span>
<span class="value" id="description">Payment required</span>
</div>
</div>
<div id="error-message" class="error" style="display: none;"></div>
<div id="instructions" class="instructions" style="display: none;">
<strong>How to pay:</strong><br>
1. Connect your wallet to this network<br>
2. Ensure you have sufficient USDC balance<br>
3. Include the X-PAYMENT header in your request<br>
4. Retry the request
</div>
<div id="testnet-info" class="testnet-info" style="display: none;">
<strong>Need testnet USDC?</strong><br>
Get some from the <a href="https://faucet.circle.com/" target="_blank" rel="noopener noreferrer">Circle
faucet</a>.
</div>
<div id="status" class="status" style="display: none;"></div>
</div>
<script>
document.addEventListener('DOMContentLoaded', function () {
if (window.x402) {
initializePaywall();
} else {
console.warn('x402 configuration not found');
showInstructions();
}
});
function initializePaywall() {
const config = window.x402;
if (config.amount > 0) {
document.getElementById('amount').textContent = `$${config.amount} USDC`;
document.getElementById('network').textContent = config.testnet ? 'Base Sepolia' : 'Base';
document.getElementById('description').textContent =
config.paymentRequirements[0]?.description || 'Payment required';
document.getElementById('payment-details').style.display = 'block';
}
if (config.error) {
document.getElementById('error-message').textContent = config.error;
document.getElementById('error-message').style.display = 'block';
}
if (config.testnet) {
document.getElementById('testnet-info').style.display = 'block';
}
showInstructions();
if (config.testnet) {
console.log('Payment requirements initialized:', config);
}
}
function showInstructions() {
document.getElementById('instructions').style.display = 'block';
}
function showStatus(message, type) {
const statusEl = document.getElementById('status');
statusEl.textContent = message;
statusEl.className = `status ${type}`;
statusEl.style.display = 'block';
}
function hideStatus() {
document.getElementById('status').style.display = 'none';
}
</script>
</body>
</html>