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Informations about the package eip1559-tx-signer-php

amashukov/eip1559-tx-signer-php

EIP-1559 (Type-2) Ethereum transaction assembly + RFC 6979 deterministic ECDSA signing in pure PHP.

CI PHPStan L9 Latest Version Downloads PHP Stars

Assemble and sign EIP-1559 (Type-2) Ethereum transactions in pure PHP. Produces a 0x02-prefixed raw transaction hex ready for eth_sendRawTransaction. Signatures are deterministic per RFC 6979 and canonical low-S, so the same (privateKey, transaction) pair always yields byte-identical output — ideal for reproducible builds, server-side signing, and EVM bridge/withdrawal automation.

Features

Why amashukov/eip1559-tx-signer-php

The common PHP path to a signed EVM transaction is web3p/ethereum-tx + kornrunner/ethereum-offline-raw-tx, which target the legacy transaction shape and pull in their own crypto stack. This package is focused on the modern Type-2 (EIP-1559) envelope with RFC 6979 deterministic signing as a first-class guarantee, composed from small single-purpose dependencies you can audit independently (keccak / RLP / secp256k1).

Installation

Usage

Empty-key placeholder

Passing an empty private key boots the signer with an all-ones placeholder key. This keeps dependency-injection containers booting in dev/test without the real secret; the resulting transaction is signed by a throwaway key, so any chain that receives it rejects the call — loudly, not silently.

Interface for DI / test doubles

Eip1559Signer implements Eip1559SignerInterface (address() + sign()). Type-hint the interface in your services and the container wires the concrete signer in production; in tests, swap a deterministic, key-free double for the interface so signing output never depends on a real private key.

How it works

  1. RLP-encode [chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data, accessList] and prepend the 0x02 type byte.
  2. keccak-256 the payload → signing hash.
  3. ECDSA-sign the hash with secp256k1 (RFC 6979 deterministic nonce, canonical low-S).
  4. RLP-encode the same fields plus [yParity, r, s], prepend 0x02 → the signed raw transaction.

Access lists are emitted empty; the signer targets the common "no access list" Type-2 transaction.

Requirements

Related packages

Package Tier Purpose
amashukov/keccak-php leaf keccak-256 hashing
amashukov/rlp-php leaf RLP encoding
amashukov/secp256k1-php leaf ECDSA sign / pubkey derivation
amashukov/abi-encoder-php composite Solidity ABI calldata encoder
amashukov/eth-rpc-client-php RPC Ethereum JSON-RPC client
amashukov/eth-php meta EVM umbrella package

Quality

License

MIT.

All versions of eip1559-tx-signer-php with dependencies

PHP Build Version
Package Version
Requires php Version >=8.3
ext-gmp Version *
amashukov/keccak-php Version ^0.1.2
amashukov/rlp-php Version ^0.1.0
amashukov/secp256k1-php Version ^0.1.0
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