Walrus PHP SDK

The Walrus PHP SDK provides a convenient, strongly-typed interface for interacting with the Walrus HTTP APIs. It supports storing and retrieving blobs via the publisher and aggregator endpoints of the Walrus service, leveraging Guzzle HTTP for robust HTTP communication.

Features

• Store Blobs: Upload data (or files) as blobs with configurable storage epochs, send-to address, and deletability options.
• Retrieve Blobs: Easily retrieve blob content using a unique blob ID.
• Strongly Typed Responses: Work with dedicated response classes such as StoreBlobResponse, NewlyCreatedResponse, and AlreadyCertifiedResponse.

Installation

Install via Composer:

composer require suicore/walrus-sdk

Usage

Here’s a basic example of how to use the SDK:

<?php

require 'vendor/autoload.php';

use Suicore\Walrus\Responses\StoreBlobOptions;
use Suicore\Walrus\WalrusClient;


// Set your API endpoints
$publisherUrl = 'https://publisher.walrus-testnet.walrus.space';
$aggregatorUrl = 'https://aggregator.walrus-testnet.walrus.space';

// Instantiate the client
$client = new WalrusClient($publisherUrl, $aggregatorUrl);

// Prepare options for storing a blob
$options = new StoreBlobOptions(epochs: 2);

// Store a text blob
$storeResponse = $client->storeBlob("Hello, Walrus!", $options);

// Check if the blob was newly created
if ($storeResponse->isNewlyCreated()) {
    $blobId = $storeResponse->getNewlyCreated()->getBlobObject()->getBlobId();
    echo "Blob stored successfully with ID: {$blobId}\n";
} else {
    // Handle the already certified case
    $blobId = $storeResponse->getAlreadyCertified()->getBlobId();
    echo "Blob was already certified with ID: {$blobId}\n";
}

// Retrieve the blob content
$content = $client->getBlob($blobId);
echo "Retrieved content: {$content}\n";

Uploading Files

To upload a file, simply pass the file path to the storeBlob method and set the $isFile parameter to true:

// Save a file as a blob
$file = '/path/to/file.txt';
$options = new StoreBlobOptions(epochs: 2);
$storeResponse = $client->storeBlob(dataOrPath: $file, options: $options, isFile: true);

Encryption

The Walrus SDK provides a simple, but secure way to encrypt and decrypt data using the Aes256Encryptor class. Here’s an example:

use Suicore\Walrus\Helpers\Aes256Encryptor;

// Encrypt data
$encryptor = new Aes256Encryptor('01234567890123456789012345678901'); // EXAMPLE, USE A DIFFERENT KEY!
$encryptedData = $encryptor->encrypt('Hello, Walrus!');
echo "Encrypted data: {$encryptedData}\n";

// Decrypt data
$decryptedData = $encryptor->decrypt($encryptedData);
echo "Decrypted data: {$decryptedData}\n";

A key length of 32 bytes is required for AES-256 encryption. Shorter or longer keys will work, but will be more unpredictable and less secure.

API Methods

storeBlob

Stores a blob using the publisher API. Parameters:

• string dataOrPath: The blob data or file path.
• StoreBlobOptions $options: Options such as epochs, sendObjectTo address, and deletability.
• bool $isFile: Set to true if $dataOrPath is a file path.
• Returns: A StoreBlobResponse object representing the response from the API.

getBlob

Retrieves a blob from the aggregator API. Parameters:

• string $blobId: The unique blob identifier.
• Returns: The blob content as a string.

Testing

To run the test suite, use the following commands:

Unit Tests

composer test

Include Integration Tests

export RUN_INTEGRATION_TESTS=1
vendor/bin/phpunit --filter WalrusClientE2ETest

Contributing

Contributions are welcome! For major changes, please open an issue first to discuss what you would like to change.

License

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