// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

contract MiddleMan {
    
    error NativeTransferFailed();
    error SendETHWithoutData();
    event FundsForwardedWithData(bytes data);
   
    address private immutable VAULT;

    constructor(address vault) {
        VAULT = vault;
    }

    fallback() external payable {
        send(VAULT, msg.value);
        emit FundsForwardedWithData(msg.data);
    }

    // Add this to reject plain ETH transfers
    receive() external payable {
        revert SendETHWithoutData();
    }

    function forward(bytes calldata data) external payable {
        send(VAULT, msg.value);
        emit FundsForwardedWithData(data);
    }

    function send(address to, uint256 value) internal {
        bool success;
        assembly {
            // call{} will return (bool, bytes), 
            // using assembly instead of call{} can save gas, 
            // no need to copy the return data to memory
            // Also can set the limit of gas use to 100k
            success := call(100000, to, value, 0, 0, 0, 0)
        }

        if (!success) {
            revert NativeTransferFailed();
        }
    }

    function getVault() external view returns (address) {
        return VAULT;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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