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Server:

nginx/1.28.0

System:

Linux 6.8.0-90-generic

PHP Version:

8.4.15

User:

alqudsvolunteers

Directory:

/home/alqudsvolunteers/htdocs/www.alqudsvolunteers.id/fliptesting

Free Space:

81.8 GB

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✏️ Editing: callback-handler.php

<?php
require_once __DIR__ . '/config/database.php';
require_once __DIR__ . '/libs/FlipAPI.php';

// Log all incoming requests for debugging
file_put_contents('callback_log.txt', date('Y-m-d H:i:s') . " - " . file_get_contents('php://input') . "\n", FILE_APPEND);

// Get the raw POST data
$payload = file_get_contents('php://input');
$data = json_decode($payload, true);

if (!$data) {
    http_response_code(400);
    die('Invalid payload');
}

try {
    $db = getDB();
    $flip = new FlipAPI();
    
    // Verify signature (if provided by Flip)
    $headers = getallheaders();
    $signature = $headers['X-Flip-Signature'] ?? '';
    
    // If signature verification is required by Flip
    if ($signature && !$flip->verifySignature($data, $signature)) {
        http_response_code(401);
        die('Invalid signature');
    }
    
    // Extract bill ID from payload
    $billId = $data['id'] ?? $data['bill_id'] ?? null;
    
    if (!$billId) {
        throw new Exception('No bill ID in payload');
    }
    
    // Find payment in database
    $stmt = $db->prepare("SELECT * FROM payments WHERE bill_id = ?");
    $stmt->execute([$billId]);
    $payment = $stmt->fetch();
    
    if (!$payment) {
        throw new Exception('Payment not found: ' . $billId);
    }
    
    // Determine status from Flip data
    $status = 'pending';
    if (isset($data['status'])) {
        $flipStatus = strtolower($data['status']);
        
        switch ($flipStatus) {
            case 'paid':
            case 'success':
                $status = 'paid';
                break;
            case 'expired':
                $status = 'expired';
                break;
            case 'failed':
                $status = 'failed';
                break;
            default:
                $status = 'pending';
        }
    }
    
    // Update payment status
    $updateStmt = $db->prepare("UPDATE payments SET status = ?, updated_at = NOW() WHERE bill_id = ?");
    $updateStmt->execute([$status, $billId]);
    
    // Log the callback
    $logStmt = $db->prepare("INSERT INTO payment_logs (payment_id, event_type, payload) VALUES (?, ?, ?)");
    $logStmt->execute([$payment['id'], 'callback', $payload]);
    
    // Respond success
    http_response_code(200);
    echo json_encode(['status' => 'success', 'message' => 'Callback processed']);
    
} catch (Exception $e) {
    error_log("Callback error: " . $e->getMessage());
    http_response_code(500);
    echo json_encode(['status' => 'error', 'message' => $e->getMessage()]);
}

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