README

A Laravel client library for integrating with the DiDiT verification API. This client handles authentication, session management, PDF report generation, and webhook processing.

Features

🔐 OAuth2 Authentication with automatic token management
🔄 Session management (create, retrieve, update)
📄 PDF report generation
🔗 Webhook processing with signature verification
⚡ Request caching and optimization
🛡️ Secure webhook signature verification
📝 Comprehensive logging options

Installation

You can install the package via composer:

composer require awaisjameel/didit-laravel-client

Configuration

Publish the configuration file:

php artisan vendor:publish --provider="AwaisJameel\DiditLaravelClient\DiditLaravelClientServiceProvider"

Add the following environment variables to your .env file:

DIDIT_CLIENT_ID=your-client-id
DIDIT_CLIENT_SECRET=your-client-secret
DIDIT_BASE_URL=https://verification.didit.me
DIDIT_AUTH_URL=https://apx.didit.me
DIDIT_WEBHOOK_SECRET=your-webhook-secret
DIDIT_TIMEOUT=10
DIDIT_TOKEN_EXPIRY_BUFFER=300
DIDIT_DEBUG=false

Usage

Basic Setup

use AwaisJameel\DiditLaravelClient\Facades\DiditLaravelClient;
// or
use AwaisJameel\DiditLaravelClient\DiditLaravelClient;

// Using the facade
$client = DiditLaravelClient::getInstance();

// Or create a new instance with custom configuration
$client = new DiditLaravelClient([
    'client_id' => 'your-client-id',
    'client_secret' => 'your-client-secret',
    // ... other config options
]);

Creating a Verification Session

$session = $client->createSession(
    callbackUrl: 'https://your-app.com/verification/callback',
    vendorData: 101,
    options: [
        'features'=> 'OCR + NFC + FACE'
    ]
);

// The session response contains:
[
    'session_id' => 'xxx-xxx-xxx',
    'verification_url' => 'https://verify.didit.me/xxx'
]

Retrieving Session Details

$sessionDetails = $client->getSession('session-id');

// Response contains verification details:
[
    'session_id' => 'xxx-xxx-xxx',
    'status' => 'completed',
    'decision' => 'approved',
    // ... other session data
]

Updating Session Status

$result = $client->updateSessionStatus(
    sessionId: 'session-id',
    newStatus: 'Approved', // or 'Declined'
    comment: 'Verification approved by admin'
);

Generating PDF Reports

$pdfContent = $client->generateSessionPDF('session-id');

// Save to file
file_put_contents('verification-report.pdf', $pdfContent);

// Or return as download response
return response($pdfContent)
    ->header('Content-Type', 'application/pdf')
    ->header('Content-Disposition', 'attachment; filename="report.pdf"');

Handling Webhooks

Set up your webhook route in routes/web.php:

Route::post('didit/webhook', function (Request $request) {
    $payload = DiditLaravelClient::processWebhook($request);

    // Handle different webhook events
    match($payload['event']) {
        'verification.completed' => handleVerificationCompleted($payload),
        'verification.expired' => handleVerificationExpired($payload),
        default => handleUnknownEvent($payload)
    };

    return response()->json(['status' => 'processed']);
});

Manual webhook signature verification:

$headers = [
    'x-signature' => $request->header('x-signature'),
    'x-timestamp' => $request->header('x-timestamp')
];

try {
    $payload = $client->verifyWebhookSignature($headers, $request->getContent());
    // Process verified webhook payload
} catch (Exception $e) {
    // Handle invalid signature
    return response()->json(['error' => $e->getMessage()], 400);
}

Error Handling

The client throws exceptions for various error conditions. It's recommended to wrap API calls in try-catch blocks:

try {
    $session = $client->createSession(...);
} catch (Exception $e) {
    // Handle error
    Log::error('DiDiT API Error: ' . $e->getMessage());
}

Common exceptions:

Configuration errors (missing credentials)
Authentication failures
Invalid session IDs
Network/API errors
Invalid webhook signatures

Debugging

Enable debug mode in your configuration to get detailed logging:

// In your .env file
DIDIT_DEBUG=true

// Or in configuration
$client = new DiditLaravelClient([
    // ... other config
    'debug' => true
]);

Debug logs will include:

API requests and responses
Token management events
Webhook processing details
Error details

Testing

The package includes comprehensive tests. Run them with:

composer test

Security

All API requests use HTTPS
Webhook signatures are verified using HMAC SHA-256
Timing attack safe signature comparison
Automatic token expiry management
Request timestamp validation

awaisjameel/didit-laravel-client

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