Bitta integratsiya — barcha to'lov usullari

use InPay\InPay;

$inpay = new InPay([
    'merchant_id'    => 12345,
    'bearer_token'   => 'xxxxxxxx',
    'webhook_secret' => 'yyyyyyyy',
]);

// To'lov yaratish
$invoice = $inpay->create([
    'amount'       => 50000,          // so'm
    'order_id'     => 'A-123',
    'callback_url' => 'https://shop.uz/hook.php',
]);

header('Location: ' . $invoice->payUrl);

# To'lov yaratish
curl -X POST https://inpay.uz/api/create \
  -H "Authorization: Bearer xxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "merchant_id": 12345,
    "amount": 50000,
    "order_id": "A-123",
    "callback_url": "https://shop.uz/hook.php"
  }'

# Javob
{
  "order_id": "a1b2c3d4e5f6a7b8",
  "pay_url":  "https://inpay.uz/checkout/a1b2..."
}

// hook.php — to'lovni tasdiqlash
$raw = file_get_contents('php://input');
$sig = $_SERVER['HTTP_X_INPAY_SIGNATURE'];

if (!$inpay->verifyWebhook($raw, $sig)) {
    http_response_code(403); exit;
}

$tx = json_decode($raw, true);
if ($tx['status'] === 'success') {
    // buyurtmani to'langan deb belgilang
}
echo 'OK';