Paymaster Template — MEV Shield

Contract Details

Categorycontracts

Files12

Price$14.99

Tech Stack

Solidity ^0.8.24 OpenZeppelin v5 ERC-4337 Foundry

Chains

Ethereum Arbitrum Base Optimism

Description

ERC-4337 paymaster contract that sponsors user gas costs from MEV rebate proceeds. Includes a verifying paymaster with stake management, deposit tracking, and integration with MEV-Share for rebate-funded sponsorship.

Features

✓ ERC-4337 compliant IPaymaster implementation
✓ Verifying paymaster with ECDSA signature validation
✓ Stake and deposit management for EntryPoint
✓ MEV rebate deposit tracking and accounting
✓ Configurable gas sponsorship limits per user
✓ Ownable2Step governance with emergency withdraw
✓ ReentrancyGuard on all value transfers
✓ Full Foundry test suite with mock EntryPoint

paymaster-template.sol

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

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

/// @title Paymaster Template
/// @notice ERC-4337 paymaster sponsoring gas from MEV rebate proceeds.
contract PaymasterTemplate {
    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
}