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Rlp Laravel Package
web3p/rlp
web3p/rlp is a PHP library for Recursive Length Prefix (RLP) encoding and decoding, the serialization format used throughout Ethereum. Encode arrays, strings, and integers, or decode 0x-prefixed hex payloads, through a simple API. MIT licensed and installable via Composer.
Recursive Length Prefix Encoding in PHP.
Frequently asked questions about Rlp
- How do I install web3p/rlp in a Laravel application?
- Install with Composer using composer require web3p/rlp. The package has no Laravel-specific dependencies, so you can use it directly; optionally bind Web3p\RLP\RLP in a service provider for dependency injection. Check your project's minimum stability settings if Composer rejects the package.
- What is RLP and when should I use web3p/rlp in Laravel?
- RLP (Recursive Length Prefix) is Ethereum's binary serialization format for nested arrays and byte strings. Use web3p/rlp when you need to encode transaction payloads, trie nodes, or other Ethereum-compatible data from PHP. For generic serialization unrelated to Ethereum, consider alternatives like msgpack or PHP serialization instead.
- Does web3p/rlp support Laravel 10, 11, or newer?
- The package is framework-agnostic and works via Composer, so it can be used with Laravel 10, 11, or newer as long as your PHP version is compatible. However, the last release was in 2022, so test against your target Laravel and PHP versions. Watch for deprecations in PHP 8.2+ and newer PHPUnit versions if you maintain tests.
- How do I encode and decode values with web3p/rlp?
- Instantiate Web3p\RLP\RLP, call encode() with a string, integer, numeric string, or nested array, and call decode() with a 0x-prefixed RLP hex string. Decode returns an array of hex strings; use hex2bin() or Web3p\RLP\Types\Str::decodeHex() to convert values back. The package expects 0x-prefixed hex input for decoding, so normalize data before calling decode().
- Can web3p/rlp handle large integers and nested arrays?
- The package supports integers, numeric strings, strings, and nested arrays, and it has fixed historical issues with large integers and single-byte decoding. Very large integers may still require careful handling because PHP integer limits apply, so use numeric strings when values exceed PHP_INT_MAX. Test complex nested arrays with mixed types in your application before relying on them in production.
- What data types does web3p/rlp reject during encoding?
- It handles strings, integers, numeric strings, and arrays but explicitly fails on unsupported types such as floats and objects. Convert floats to integers or strings in your application layer before encoding, and serialize objects into arrays or strings first. This validation behavior helps catch invalid payloads early.
- How does web3p/rlp fit into an Ethereum transaction signing flow in Laravel?
- Use web3p/rlp to encode the transaction fields into the RLP binary format, then hash and sign the encoded payload with an Ethereum library or extension. The package provides only low-level RLP encoding/decoding, so you must layer Ethereum-specific transaction logic and key management on top. Validate all incoming hex data before encoding or decoding.
- Is web3p/rlp maintained and safe for production use?
- It is MIT-licensed and has high test coverage, but the last release was in 2022 and the package has little community adoption, so maintenance risk exists. For production, pin a known version, add your own edge-case tests, and plan for PHP upgrade compatibility. Consider forking or wrapping it if long-term support is critical.
- What are alternatives to web3p/rlp for RLP encoding in PHP?
- Alternatives include using web3p/web3.php, which may bundle RLP functionality, or implementing RLP manually for narrow use cases. For non-Ethereum serialization, consider msgpack, igbinary, or PHP's serialize(). Evaluate alternatives if you need active maintenance, benchmarks, or higher throughput.
- How should I test web3p/rlp in a Laravel project?
- Write feature tests that encode and decode known RLP fixtures, including nested arrays, large integer strings, and 0x-prefixed inputs. Use PHPUnit to assert hex outputs and round-trip decode results, and include malformed hex cases to verify exceptions. Test on your target PHP and Laravel versions because the package has not been updated recently.
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