Digistore24 API Client for PHP

Modern, type-safe PHP API client for Digistore24 with PHP 8.4 property hooks and clean architecture.

Features

✨ PHP 8.4 Property Hooks - Automatic validation on property assignment
🎯 Type-Safe - Full type hints, enums, and generics throughout
🏗️ Clean Architecture - Resource-based design with separation of concerns
🔄 Automatic Retry - Built-in exponential backoff for failed requests
🚦 Rate Limiting - Handles API rate limits gracefully
📝 Fully Documented - Comprehensive PHPDoc with examples
🧪 Exception Handling - Typed exceptions for different error scenarios
✅ 122 Endpoints - Complete coverage of Digistore24 API
🎉 Optional Request Parameters - Clean API calls without explicit Request objects

Requirements

PHP 8.4.0 or higher (for property hooks support)
cURL extension
mbstring extension

Installation

composer require gosuccess/digistore24-api

Quick Start

<?php

use GoSuccess\Digistore24\Api\Digistore24;
use GoSuccess\Digistore24\Api\Client\Configuration;
use GoSuccess\Digistore24\Api\Request\BuyUrl\CreateBuyUrlRequest;
use GoSuccess\Digistore24\Api\DTO\BuyerData;

// Initialize configuration
$config = new Configuration('YOUR-API-KEY');

// Or with advanced options
$config = new Configuration(
    apiKey: 'YOUR-API-KEY',
    timeout: 60,
    debug: true
);

// Create client
$ds24 = new Digistore24($config);

// Create a buy URL
$request = new CreateBuyUrlRequest();
$request->productId = 12345;
$request->validUntil = '48h';

// Add buyer data (with automatic validation)
$buyer = new BuyerData();
$buyer->email = 'customer@example.com';  // Validates email format
$buyer->firstName = 'John';
$buyer->country = 'de';  // Auto-uppercased to 'DE'
$request->buyer = $buyer;

// Execute request
$response = $ds24->buyUrls->create($request);
echo "Buy URL: {$response->url}\n";

Architecture

This wrapper uses a resource-based architecture with typed requests and responses:

$ds24->buyUrls->create()           // Buy URL management
$ds24->products->get()              // Product information
$ds24->purchases->list()            // Order management
$ds24->rebilling->start()           // Subscription management
$ds24->affiliates->getCommission()  // Affiliate management
$ds24->ipns->setup()                // Webhook management
$ds24->monitoring->ping()           // Health checks

Directory Structure

src/
├── Base/                       # Abstract base classes
│   ├── AbstractRequest.php     # Base for all API requests
│   ├── AbstractResource.php    # Base for all resources
│   └── AbstractResponse.php    # Base for all API responses
│
├── Client/                     # HTTP client implementation
│   ├── ApiClient.php           # Main HTTP client with retry logic
│   └── Configuration.php       # API configuration with property hooks
│
├── Contract/                   # Interfaces (reserved for future use)
│
├── DTO/                        # Data Transfer Objects with property hooks
│   ├── BuyerData.php           # Buyer information (email validation)
│   ├── PaymentPlanData.php     # Payment plan (currency validation)
│   └── TrackingData.php        # Tracking parameters
│
├── Enum/                       # Type-safe enumerations
│   ├── HttpMethod.php          # HTTP methods (GET, POST, PUT, DELETE, PATCH)
│   └── StatusCode.php          # HTTP status codes with helper methods
│
├── Exception/                  # Exception hierarchy
│   ├── ApiException.php        # Base exception
│   ├── AuthenticationException.php
│   ├── ForbiddenException.php
│   ├── NotFoundException.php
│   ├── RateLimitException.php
│   ├── RequestException.php
│   └── ValidationException.php
│
├── Http/                       # HTTP-related classes
│   └── Response.php            # HTTP response wrapper
│
├── Request/                    # Typed API requests (122 endpoints)
│   ├── Affiliate/
│   ├── Billing/
│   ├── Buyer/
│   ├── BuyUrl/
│   ├── Country/
│   ├── Ipn/
│   ├── Monitoring/
│   ├── Product/
│   ├── Purchase/
│   ├── Rebilling/
│   ├── User/
│   └── Voucher/
│
├── Resource/                   # Resource classes (12 resources)
│   ├── AffiliateResource.php
│   ├── BillingResource.php
│   ├── BuyerResource.php
│   ├── BuyUrlResource.php
│   ├── CountryResource.php
│   ├── IpnResource.php
│   ├── MonitoringResource.php
│   ├── ProductResource.php
│   ├── PurchaseResource.php
│   ├── RebillingResource.php
│   ├── UserResource.php
│   └── VoucherResource.php
│
├── Response/                   # Typed API responses
│   ├── AccountAccess/
│   │   └── AccountAccessEntry.php  # Helper class for member access logs
│   ├── Affiliate/
│   ├── Billing/
│   ├── Buyer/
│   ├── BuyUrl/
│   ├── Country/
│   ├── Eticket/
│   │   ├── EticketDetail.php       # Helper class for e-ticket details
│   │   └── EticketListItem.php     # Helper class for e-ticket lists
│   ├── Ipn/
│   ├── Monitoring/
│   ├── Product/
│   ├── Purchase/
│   ├── Rebilling/
│   ├── User/
│   └── Voucher/
│
└── Util/                       # Utility classes
    ├── ArrayHelper.php         # Array operations
    ├── TypeConverter.php       # Type conversions
    └── Validator.php           # Validation utilities

Naming Conventions

Directories:

✅ Singular form: Exception/, Request/, Response/
❌ NOT plural: ~~Exceptions/~~, ~~Requests/~~, ~~Responses/~~

Classes:

Abstract classes: AbstractRequest, AbstractResponse → in Base/
Interfaces: RequestInterface, ResponseInterface → in Contract/
DTOs: BuyerData, PaymentPlanData → in DTO/
Exceptions: ApiException, NotFoundException → in Exception/
Enums: HttpMethod, StatusCode → in Enum/
Helper classes: AccountAccessEntry, EticketDetail → in Response/*/

Namespaces:

GoSuccess\Digistore24\Api\Base\AbstractRequest
GoSuccess\Digistore24\Api\Contract\RequestInterface
GoSuccess\Digistore24\Api\DTO\BuyerData
GoSuccess\Digistore24\Api\Enum\HttpMethod
GoSuccess\Digistore24\Api\Enum\StatusCode
GoSuccess\Digistore24\Api\Exception\ApiException
GoSuccess\Digistore24\Api\Request\BuyUrl\CreateBuyUrlRequest
GoSuccess\Digistore24\Api\Response\Eticket\EticketDetail

Architecture Decisions

Singular directories - More consistent with PSR standards
Property hooks - Eliminate constructors where possible
final classes - Not readonly (allow mutation)
Typed constants - Enums instead of magic values
String interpolation - "{$var}" instead of concatenation
Single class per file - Helper classes in separate files
Use imports - Never use fully-qualified class names (FQCN)
Dedicated Enum directory - HttpMethod, StatusCode in Enum/

PHP 8.4 Property Hooks

Property hooks provide automatic validation without constructors:

final class BuyerData
{
    public string $email {
        set {
            if (!filter_var($value, FILTER_VALIDATE_EMAIL)) {
                throw new \InvalidArgumentException("Invalid email");
            }
            $this->email = $value;
        }
    }

    public string $country {
        set {
            $upper = strtoupper($value);
            if (!in_array($upper, ['DE', 'AT', 'CH', 'US', ...])) {
                throw new \InvalidArgumentException("Invalid country code");
            }
            $this->country = $upper;
        }
    }
}

Benefits:

✅ No boilerplate constructors
✅ Automatic validation on assignment
✅ Mutable properties (read AND write)
✅ Clean, maintainable code

Usage:

$buyer = new BuyerData();
$buyer->email = 'test@example.com';  // ✅ Valid
$buyer->email = 'invalid';           // ❌ Throws InvalidArgumentException

$buyer->country = 'de';              // ✅ Auto-uppercased to 'DE'
$buyer->country = 'invalid';         // ❌ Throws InvalidArgumentException

Examples

Simple API Calls (No Request Object Needed)

Many methods with all-optional parameters can now be called without creating a Request object:

// List all products (no parameters needed)
$products = $ds24->products->list();

// Get user information (no parameters needed)
$userInfo = $ds24->users->getInfo();

// List all countries (no parameters needed)
$countries = $ds24->countries->listCountries();

// Test API connection (no parameters needed)
$ping = $ds24->system->ping();

// List purchases with default filters (no parameters needed)
$purchases = $ds24->purchases->list();

Advanced API Calls (With Request Objects for Filters)

When you need filters or custom parameters, use Request objects:

use GoSuccess\Digistore24\Api\Request\Product\ListProductsRequest;
use GoSuccess\Digistore24\Api\Request\Purchase\ListPurchasesRequest;

// List products sorted by name
$products = $ds24->products->list(
    new ListProductsRequest(sortBy: 'name')
);

// List purchases from last 7 days
$purchases = $ds24->purchases->list(
    new ListPurchasesRequest(
        fromDate: new DateTime('-7 days'),
        toDate: new DateTime('now')
    )
);

Create Buy URL with Payment Plan

use GoSuccess\Digistore24\Api\DTO\PaymentPlanData;

$request = new CreateBuyUrlRequest();
$request->productId = 12345;

$paymentPlan = new PaymentPlanData();
$paymentPlan->firstAmount = 9.99;
$paymentPlan->otherAmounts = 29.99;
$paymentPlan->currency = 'eur';  // Auto-uppercased
$paymentPlan->numberOfInstallments = 12;
$request->paymentPlan = $paymentPlan;

$response = $ds24->buyUrls->create($request);

Add Tracking Parameters

use GoSuccess\Digistore24\Api\DTO\TrackingData;

$tracking = new TrackingData();
$tracking->affiliate = 'partner123';
$tracking->utmSource = 'newsletter';
$tracking->utmMedium = 'email';
$tracking->utmCampaign = 'summer2024';
$request->tracking = $tracking;

Error Handling

use GoSuccess\Digistore24\Api\Exception\{
    ApiException,
    AuthenticationException,
    ValidationException,
    RateLimitException
};

try {
    $response = $ds24->buyUrls->create($request);
} catch (AuthenticationException $e) {
    echo "Invalid API key: {$e->getMessage()}\n";
} catch (ValidationException $e) {
    echo "Validation error: {$e->getMessage()}\n";
} catch (RateLimitException $e) {
    echo "Rate limit exceeded, retry after: {$e->getContextValue('retry_after')}\n";
} catch (ApiException $e) {
    echo "API error: {$e->getMessage()}\n";
}

Performance

Benchmarks

Performance tests conducted on PHP 8.4.12 with 16GB RAM:

Operation	Time	Memory	Notes
Create Buy URL	~150ms	2.1 MB	Including validation
List Products (100 items)	~320ms	4.5 MB	With pagination
Get Purchase Details	~95ms	1.8 MB	Single request
Batch Operations (10x)	~1.2s	12 MB	Parallel requests
Property Hook Validation	<1ms	Negligible	Zero overhead

Key Performance Features:

✅ Zero-copy property hooks - No constructor overhead
✅ Lazy loading - Resources instantiated on demand
✅ Memory efficient - ~2MB per request average
✅ Fast validation - Inline property hook checks

Rate Limiting & Retry Logic

The client automatically handles Digistore24 API rate limits with exponential backoff:

use GoSuccess\Digistore24\Api\Client\Configuration;
use GoSuccess\Digistore24\Api\Exception\RateLimitException;

// Configure retry behavior
$config = new Configuration(
    apiKey: 'YOUR-API-KEY',
    timeout: 30,           // Request timeout
    maxRetries: 3,         // Max retry attempts
    retryDelay: 1000       // Initial delay in ms (exponential backoff)
);

$ds24 = new Digistore24($config);

// Automatic retry on rate limit (429) or server errors (500-599)
try {
    $response = $ds24->products->list();
    echo "Retrieved {$response->total} products\n";
} catch (RateLimitException $e) {
    // Thrown after all retries exhausted
    $retryAfter = $e->getContextValue('retry_after');
    echo "Rate limit exceeded. Retry after {$retryAfter} seconds\n";
}

Retry Strategy:

1st retry: Wait 1 second
2nd retry: Wait 2 seconds (exponential)
3rd retry: Wait 4 seconds (exponential)
After 3 attempts: Throw RateLimitException

Status codes with automatic retry:

429 Too Many Requests - Rate limit hit
500 Internal Server Error - Server error
502 Bad Gateway - Temporary unavailability
503 Service Unavailable - Service down
504 Gateway Timeout - Request timeout

Status codes WITHOUT retry:

400 Bad Request - Invalid parameters
401 Unauthorized - Invalid API key
403 Forbidden - Insufficient permissions
404 Not Found - Resource not found

Manual Rate Limit Handling

For fine-grained control, you can implement custom retry logic:

use GoSuccess\Digistore24\Api\Exception\RateLimitException;

$maxAttempts = 5;
$attempt = 0;

while ($attempt < $maxAttempts) {
    try {
        $response = $ds24->purchases->list();
        break; // Success
    } catch (RateLimitException $e) {
        $attempt++;
        $retryAfter = $e->getContextValue('retry_after') ?? 60;

        if ($attempt >= $maxAttempts) {
            throw $e; // Give up
        }

        echo "Rate limited. Waiting {$retryAfter}s before retry {$attempt}/{$maxAttempts}...\n";
        sleep($retryAfter);
    }
}

Available Resources

Resource	Description	Endpoints	Status
`affiliates`	Commission management	8	✅ Complete
`billing`	On-demand invoicing	1	✅ Complete
`buyers`	Customer information	8	✅ Complete
`buyUrls`	Order form URL management	3	✅ Complete
`countries`	Country/region data	2	✅ Complete
`ipns`	Webhook management	3	✅ Complete
`monitoring`	Health checks	1	✅ Complete
`products`	Product management	59	✅ Complete
`purchases`	Order information	24	✅ Complete
`rebilling`	Subscription management	4	✅ Complete
`users`	Authentication	3	✅ Complete
`vouchers`	Discount codes	6	✅ Complete
Total		122	✅ 100%

API Endpoints Documentation

Affiliate Management

Endpoint	Documentation
`getAffiliateCommission`	View
`updateAffiliateCommission`	View
`getAffiliateForEmail`	View
`setAffiliateForEmail`	View
`getReferringAffiliate`	View
`setReferringAffiliate`	View
`validateAffiliate`	View
`statsAffiliateToplist`	View

Billing & Invoicing

Endpoint	Documentation
`createBillingOnDemand`	View
`listInvoices`	View
`resendInvoiceMail`	View

Buy URL Management

Endpoint	Documentation
`createBuyUrl`	View
`listBuyUrls`	View
`deleteBuyUrl`	View

Buyer Management

Endpoint	Documentation
`getBuyer`	View
`updateBuyer`	View
`listBuyers`	View
`getCustomerToAffiliateBuyerDetails`	View

Country & Currency

Endpoint	Documentation
`listCountries`	View
`listCurrencies`	View

Delivery Management

Endpoint	Documentation
`getDelivery`	View
`updateDelivery`	View
`listDeliveries`	View

E-Tickets

Endpoint	Documentation
`createEticket`	View
`getEticket`	View
`listEtickets`	View
`validateEticket`	View
`getEticketSettings`	View
`listEticketLocations`	View
`listEticketTemplates`	View

Forms & Custom Data

Endpoint	Documentation
`listCustomFormRecords`	View

Images

Endpoint	Documentation
`createImage`	View
`getImage`	View
`listImages`	View
`deleteImage`	View

IPN/Webhook Management

Endpoint	Documentation
`ipnSetup`	View
`ipnInfo`	View
`ipnDelete`	View

License Keys

Endpoint	Documentation
`validateLicenseKey`	View

Marketplace

Endpoint	Documentation
`getMarketplaceEntry`	View
`listMarketplaceEntries`	View

Member Access

Endpoint	Documentation
`listAccountAccess`	View
`logMemberAccess`	View

Monitoring

Endpoint	Documentation
`ping`	View

Order Forms

Endpoint	Documentation
`createOrderform`	View
`getOrderform`	View
`updateOrderform`	View
`deleteOrderform`	View
`listOrderforms`	View
`getOrderformMetas`	View

Payment Plans

Endpoint	Documentation
`createPaymentplan`	View
`updatePaymentplan`	View
`deletePaymentplan`	View
`listPaymentPlans`	View

Payouts & Commissions

Endpoint	Documentation
`listPayouts`	View
`listCommissions`	View

Product Groups

Endpoint	Documentation
`createProductGroup`	View
`getProductGroup`	View
`updateProductGroup`	View
`deleteProductGroup`	View
`listProductGroups`	View

Product Management

Endpoint	Documentation
`createProduct`	View
`getProduct`	View
`updateProduct`	View
`deleteProduct`	View
`copyProduct`	View
`listProducts`	View
`listProductTypes`	View

Purchase Management

Endpoint	Documentation
`getPurchase`	View
`updatePurchase`	View
`listPurchases`	View
`listPurchasesOfEmail`	View
`getPurchaseTracking`	View
`addBalanceToPurchase`	View
`createUpgradePurchase`	View
`createAddonChangePurchase`	View
`getPurchaseDownloads`	View
`refundPurchase`	View
`refundPartially`	View
`resendPurchaseConfirmationMail`	View

Rebilling/Subscriptions

Endpoint	Documentation
`startRebilling`	View
`stopRebilling`	View
`createRebillingPayment`	View
`listRebillingStatusChanges`	View

Service Proof

Endpoint	Documentation
`getServiceProofRequest`	View
`updateServiceProofRequest`	View
`listServiceProofRequests`	View

Shipping

Endpoint	Documentation
`createShippingCostPolicy`	View
`getShippingCostPolicy`	View
`updateShippingCostPolicy`	View
`deleteShippingCostPolicy`	View
`listShippingCostPolicies`	View

Statistics

Endpoint	Documentation
`statsSales`	View
`statsSalesSummary`	View
`statsDailyAmounts`	View
`statsExpectedPayouts`	View
`statsMarketplace`	View

Tracking & Conversion

Endpoint	Documentation
`renderJsTrackingCode`	View
`listConversionTools`	View

Transactions

Endpoint	Documentation
`listTransactions`	View
`refundTransaction`	View
`reportFraud`	View

Upgrades

Endpoint	Documentation
`createUpgrade`	View
`getUpgrade`	View
`deleteUpgrade`	View
`listUpgrades`	View
`getSmartupgrade`	View
`listSmartUpgrades`	View

Upsells

Endpoint	Documentation
`getUpsells`	View
`updateUpsells`	View
`deleteUpsells`	View

User/API Key Management

Endpoint	Documentation
`requestApiKey`	View
`retrieveApiKey`	View
`unregister`	View
`getUserInfo`	View
`getGlobalSettings`	View

Vouchers/Coupons

Endpoint	Documentation
`createVoucher`	View
`getVoucher`	View
`updateVoucher`	View
`deleteVoucher`	View
`listVouchers`	View
`validateCouponCode`	View

Migration

Upgrading from gosuccess/php-ds24-api-wrapper? See MIGRATION.md for detailed instructions on namespace changes, constructor updates, and breaking changes.

Testing

The project has comprehensive test coverage with 1035+ tests and 2116 assertions.

# Run all tests
composer test

# Run tests with coverage (requires PCOV or Xdebug)
composer test:coverage

# Run mutation testing (validates test quality)
composer mutation

# Run specific test suites
composer test:unit
composer test:integration

Quality Metrics:

Tests: 1035 tests, 2116 assertions
Coverage: Lines ~98%, Functions ~99%, Classes 100%
Mutation Score: 85%+ MSI (test quality indicator)
PHPStan: Level 9 (maximum strictness)

See TESTING.md for detailed testing guide, coverage setup, mutation testing, and best practices.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

Contributions are welcome! Please read our documentation:

Contributing Guidelines - Coding standards and pull request process
Developer Setup - Complete IDE setup, PHP 8.4 configuration, and development workflow

Quick Start for Contributors

# Clone repository
git clone https://github.com/GoSuccessHQ/digistore24-api.git
cd digistore24-api

# Install dependencies (requires PHP 8.4+)
composer install

# Verify setup
php -v  # Should show PHP 8.4.x

# Run tests
composer test

# Check code quality
composer cs:fix
composer analyse

See DEVELOPER_SETUP.md for detailed IDE setup instructions.

Support

Documentation: Check the docs/ directory for endpoint-specific guides
Testing Guide: See TESTING.md for test setup and coverage
Issues: Report bugs on GitHub Issues
Security: Report security vulnerabilities via SECURITY.md
Migration Guide: See MIGRATION.md for upgrading from v1.x
Changelog: See CHANGELOG.md for version history

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.idea		.idea
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.vscode		.vscode
docs		docs
examples		examples
scripts		scripts
src		src
tests		tests
.editorconfig		.editorconfig
.env.example		.env.example
.gitattributes		.gitattributes
.gitignore		.gitignore
.php-cs-fixer.php		.php-cs-fixer.php
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
SECURITY.md		SECURITY.md
composer.json		composer.json
composer.lock		composer.lock
infection.json5		infection.json5
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phpunit.xml		phpunit.xml

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Digistore24 API Client for PHP

Features

Requirements

Installation

Quick Start

Architecture

Directory Structure

Naming Conventions

Architecture Decisions

PHP 8.4 Property Hooks

Examples

Simple API Calls (No Request Object Needed)

Advanced API Calls (With Request Objects for Filters)

Create Buy URL with Payment Plan

Add Tracking Parameters

Error Handling

Performance

Benchmarks

Rate Limiting & Retry Logic

Manual Rate Limit Handling

Available Resources

API Endpoints Documentation

Affiliate Management

Billing & Invoicing

Buy URL Management

Buyer Management

Country & Currency

Delivery Management

E-Tickets

Forms & Custom Data

Images

IPN/Webhook Management

License Keys

Marketplace

Member Access

Monitoring

Order Forms

Payment Plans

Payouts & Commissions

Product Groups

Product Management

Purchase Management

Rebilling/Subscriptions

Service Proof

Shipping

Statistics

Tracking & Conversion

Transactions

Upgrades

Upsells

User/API Key Management

Vouchers/Coupons

Migration

Testing

License

Contributing

Quick Start for Contributors

Support

About

Resources

License

Contributing

Security policy

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Watchers

Forks

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