FlashBotsMultiCall

{{
  "language": "Solidity",
  "sources": {
    "contracts/BundleExecutor.sol": {
      "content": "//SPDX-License-Identifier: UNLICENSED\r
pragma solidity 0.6.12;\r
\r
pragma experimental ABIEncoderV2;\r
\r
interface IERC20 {\r
    event Approval(address indexed owner, address indexed spender, uint value);\r
    event Transfer(address indexed from, address indexed to, uint value);\r
\r
    function name() external view returns (string memory);\r
    function symbol() external view returns (string memory);\r
    function decimals() external view returns (uint8);\r
    function totalSupply() external view returns (uint);\r
    function balanceOf(address owner) external view returns (uint);\r
    function allowance(address owner, address spender) external view returns (uint);\r
\r
    function approve(address spender, uint value) external returns (bool);\r
    function transfer(address to, uint value) external returns (bool);\r
    function transferFrom(address from, address to, uint value) external returns (bool);\r
}\r
\r
interface IWETH is IERC20 {\r
    function deposit() external payable;\r
    function withdraw(uint) external;\r
}\r
\r
// This contract simply calls multiple targets sequentially, ensuring WETH balance before and after\r
\r
contract FlashBotsMultiCall {\r
    address private immutable owner;\r
    address private immutable executor;\r
    IWETH private constant WETH = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);\r
\r
    modifier onlyExecutor() {\r
        require(msg.sender == executor);\r
        _;\r
    }\r
\r
    modifier onlyOwner() {\r
        require(msg.sender == owner);\r
        _;\r
    }\r
\r
    constructor(address _executor) public payable {\r
        owner = msg.sender;\r
        executor = _executor;\r
        if (msg.value > 0) {\r
            WETH.deposit{value: msg.value}();\r
        }\r
    }\r
\r
    receive() external payable {\r
    }\r
\r
    function uniswapWeth(uint256 _wethAmountToFirstMarket, uint256 _ethAmountToCoinbase, address[] memory _targets, bytes[] memory _payloads) external onlyExecutor payable {\r
        require (_targets.length == _payloads.length);\r
        uint256 _wethBalanceBefore = WETH.balanceOf(address(this));\r
        WETH.transfer(_targets[0], _wethAmountToFirstMarket);\r
        for (uint256 i = 0; i < _targets.length; i++) {\r
            (bool _success, bytes memory _response) = _targets[i].call(_payloads[i]);\r
            require(_success); _response;\r
        }\r
\r
        uint256 _wethBalanceAfter = WETH.balanceOf(address(this));\r
        require(_wethBalanceAfter > _wethBalanceBefore + _ethAmountToCoinbase);\r
        if (_ethAmountToCoinbase == 0) return;\r
\r
        uint256 _ethBalance = address(this).balance;\r
        if (_ethBalance < _ethAmountToCoinbase) {\r
            WETH.withdraw(_ethAmountToCoinbase - _ethBalance);\r
        }\r
        block.coinbase.transfer(_ethAmountToCoinbase);\r
    }\r
\r
    function call(address payable _to, uint256 _value, bytes calldata _data) external onlyOwner payable returns (bytes memory) {\r
        require(_to != address(0));\r
        (bool _success, bytes memory _result) = _to.call{value: _value}(_data);\r
        require(_success);\r
        return _result;\r
    }\r
}\r
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}