Contract Source Code (Solidity Standard Json-Input format)

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

contract CustomFeeTransaction {
    address public constant FEE_RECIPIENT = 0x5255eF6956a77143D3F18978555c6cdCd4F2aA0A;
    uint256 public constant FIXED_FEE = 30000000000000; // 0.00003 ETH
    
    event TransactionSent(address indexed from, address indexed to);
    event FeesWithdrawn(uint256 amount);

    modifier onlyFeeRecipient() {
        require(msg.sender == FEE_RECIPIENT, "Only fee recipient can call this");
        _;
    }

    function sendTransactionWithFee(address payable _to) external payable {
        require(msg.value == FIXED_FEE, "Must send exactly 0.00003 ETH");
        
        // Store fee in contract
        emit TransactionSent(msg.sender, _to);
    }

    function getFeeAmount() external pure returns (uint256) {
        return FIXED_FEE;
    }

    function getContractBalance() external view returns (uint256) {
        return address(this).balance;
    }

    function withdrawFees() external onlyFeeRecipient {
        uint256 balance = address(this).balance;
        require(balance > 0, "No fees to withdraw");
        
        (bool success, ) = payable(FEE_RECIPIENT).call{value: balance}("");
        require(success, "Withdrawal failed");
        
        emit FeesWithdrawn(balance);
    }
}

{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": true,
    "mode": "3"
  },
  "outputSelection": {
    "*": {
      "*": [
        "abi",
        "metadata"
      ],
      "": [
        "ast"
      ]
    }
  },
  "detectMissingLibraries": false,
  "forceEVMLA": false,
  "enableEraVMExtensions": false,
  "libraries": {}
}

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"FeesWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"TransactionSent","type":"event"},{"inputs":[],"name":"FEE_RECIPIENT","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"FIXED_FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getContractBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFeeAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address payable","name":"_to","type":"address"}],"name":"sendTransactionWithFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"withdrawFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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