Private Tx Relay — MEV Shield

Contract Details

Categorysdk

Files12

Price$9.99

Tech Stack

TypeScript ethers.js v6 node-fetch

Chains

Ethereum Goerli

Description

TypeScript template for submitting transactions privately via Flashbots Protect and MEV-Share. Includes relay client, bundle building, status polling, and fallback strategies for failed submissions.

Features

✓ Flashbots Protect relay client
✓ MEV-Share private transaction submission
✓ Bundle building and signing utilities
✓ Submission status polling with retry logic
✓ Fallback to public mempool on relay failure
✓ Configurable MEV hint preferences
✓ Transaction simulation before submission
✓ Comprehensive test suite with mocked relay

private-tx-relay.sol

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

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

/// @title Private Tx Relay
/// @notice Template for submitting txs via Flashbots Protect + MEV-Share.
contract PrivateTxRelay {
    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
}