Groww PHP API SDK

A PHP SDK for interacting with the Groww Trading API.

Installation

Install via Composer:

composer require gopalindians/groww-php-sdk

Usage

Authentication

use Groww\API\Client;

// Initialize the client with your API key
$groww = new Client('your_api_key_here');

// Optional: Enable logging
$groww->setLogging(true, function($level, $message, $context) {
    // Custom logging implementation
    error_log("[$level] $message " . json_encode($context));
});

Trading

Place a new order

try {
    $orderData = [
        'validity' => 'DAY',
        'exchange' => 'NSE',
        'transaction_type' => 'BUY',
        'order_type' => 'MARKET',
        'price' => 0,
        'product' => 'CNC',
        'quantity' => 1,
        'segment' => 'CASH',
        'trading_symbol' => 'IDEA'
    ];
    
    $result = $groww->orders()->create($orderData);
    print_r($result);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Get order details

try {
    $orderDetails = $groww->orders()->details('GMK39038RDT490CCVRO');
    print_r($orderDetails);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Cancel an order

try {
    $result = $groww->orders()->cancel('GMK39038RDT490CCVRO');
    print_r($result);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Portfolio Management

Get holdings

try {
    $holdings = $groww->portfolio()->holdings();
    print_r($holdings);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Get positions

try {
    $positions = $groww->portfolio()->positions();
    print_r($positions);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Market Data

Search for instruments

try {
    $searchResults = $groww->instruments()->search('RELIANCE');
    print_r($searchResults);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Get live quotes

try {
    $quotes = $groww->liveData()->quotes(['RELIANCE', 'IDEA']);
    print_r($quotes);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Get historical data

try {
    $candleData = $groww->historicalData()->candles(
        'RELIANCE',
        '1d',
        '2023-01-01',
        '2023-01-31'
    );
    print_r($candleData);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Margin Information

try {
    $availableMargin = $groww->margin()->available();
    print_r($availableMargin);
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error: " . $e->getMessage() . " (Code: " . $e->getErrorCode() . ")";
}

Error Handling

The SDK throws GrowwApiException when an error occurs. You can catch this exception to handle errors gracefully:

try {
    // API operations
} catch (Groww\API\Exceptions\GrowwRateLimitException $e) {
    // Handle rate limiting specifically
    echo "Rate limit exceeded. Try again after " . $e->getWaitTime() . " seconds.\n";
    sleep($e->getWaitTime());
    
    // Retry the request
} catch (Groww\API\Exceptions\GrowwApiException $e) {
    echo "Error message: " . $e->getMessage() . "\n";
    echo "Error code: " . $e->getErrorCode() . "\n";
    
    // Handle different error codes
    switch ($e->getErrorCode()) {
        case 'GA001':
            echo "Bad request - check your parameters\n";
            break;
        case 'GA005':
            echo "Authentication error - check your API key\n";
            break;
        default:
            echo "Unknown error occurred\n";
            break;
    }
}

Security Features

This SDK implements several security best practices:

1. Input Validation: All inputs are validated before being sent to the API.
2. TLS/SSL Verification: HTTPS connections are enforced by default.
3. Rate Limiting Protection: Built-in rate limiting with exponential backoff.
4. Parameter Sanitization: All parameters are sanitized to prevent injection attacks.
5. Sensitive Data Protection: API keys and other sensitive data are redacted in logs.
6. Error Handling: Comprehensive error handling for security-related issues.

Secure Logging

The SDK includes a secure logging system that redacts sensitive information:

// Enable logging with a custom logger
$groww->setLogging(true, function($level, $message, $context) {
    // Custom logging implementation
    // All sensitive data is automatically redacted
});

Testing

The SDK comes with a comprehensive test suite. To run the tests:

1. Install development dependencies:

composer install --dev

2. Run PHPUnit:

./vendor/bin/phpunit

Continuous Integration

This project uses GitHub Actions for continuous integration. Every time code is pushed to the main or master branch, or when a pull request is created against these branches, the test suite is automatically executed on multiple PHP versions (7.4, 8.0, and 8.1).

The CI pipeline:

1. Sets up the PHP environment
2. Installs dependencies via Composer
3. Runs the PHPUnit test suite

You can check the workflow configuration in the .github/workflows/php-tests.yml file.

Writing Your Own Tests

You can use the existing test suite as a reference for writing your own tests. The SDK provides mock responses and helpers to make testing easier:

use Groww\API\Tests\TestCase;
use Groww\API\Client;
use GuzzleHttp\Handler\MockHandler;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Psr7\Response;
use GuzzleHttp\Client as HttpClient;

class YourTest extends TestCase
{
    public function testYourMethod()
    {
        // Create a mock response
        $mockResponse = $this->createSuccessResponse(['data' => 'value']);
        
        // Set up mock handler
        $mock = new MockHandler([
            new Response(200, [], json_encode($mockResponse))
        ]);
        
        $handlerStack = HandlerStack::create($mock);
        $httpClient = new HttpClient(['handler' => $handlerStack]);
        
        // Create client with mock
        $client = new Client($this->getTestApiKey());
        $client->setHttpClient($httpClient);
        
        // Test your code
        $result = $client->get('/endpoint');
        
        // Assert results
        $this->assertEquals($mockResponse, $result);
    }
}

API Documentation

For the full API reference, visit the Groww API documentation at: https://groww.in/trade-api/docs/curl

License

MIT