EIP-712 Signing Library — MEV Shield

Contract Details

Categorycontracts

Files12

Price$6.99

Tech Stack

Solidity ^0.8.24 OpenZeppelin v5 Foundry

Chains

Ethereum Arbitrum Base Optimism

Description

Human-readable EIP-712 typed data signing library with replay protection and domain separator validation. Includes Solidity verifier, TypeScript signer, and common DeFi struct type definitions.

Features

✓ EIP-712 typed data hash construction
✓ Domain separator with chain ID validation
✓ Nonce-based replay protection
✓ Deadline/expiry enforcement
✓ Common DeFi type hash definitions
✓ ECDSA signature verification (v, r, s)
✓ Compact signature support (EIP-2098)
✓ Full Foundry test suite

eip712-signing-lib.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/// @title EIP-712 Signing Library
/// @notice Human-readable EIP-712 signing library with replay protection.
contract Eip712SigningLib {
    address public immutable owner;
    uint256 public constant VERSION = 1;

    event Initialized(address indexed deployer);

    constructor() {
        owner = msg.sender;
        emit Initialized(msg.sender);
    }

    // ... full implementation in purchased package
}