MigrationContractCode

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface IERC20 {
    function balanceOf(address account) external view returns (uint256);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    function transfer(address recipient, uint256 amount) external returns (bool);
}

contract TRXMigration {
    address public owner;
    IERC20 public oldTRX;
    IERC20 public newTRX;
    bool public migrationActive = true;

    mapping(address => bool) public migrated;

    event Migrated(address indexed user, uint256 amount);
    event MigrationStatusChanged(bool active);

    modifier onlyOwner() {
        require(msg.sender == owner, "Not authorized");
        _;
    }

    modifier isMigrationActive() {
        require(migrationActive, "Migration has ended");
        _;
    }

    constructor(address _oldTRX, address _newTRX) {
        owner = msg.sender;
        oldTRX = IERC20(_oldTRX);
        newTRX = IERC20(_newTRX);
    }

    function migrateTokens(uint256 amount) external isMigrationActive {
        require(!migrated[msg.sender], "Already migrated");
        require(amount > 0, "Invalid amount");

        // Transfer old TRX from user to this contract
        require(oldTRX.transferFrom(msg.sender, address(this), amount), "Old TRX transfer failed");

        // Send new TRX to user
        require(newTRX.transfer(msg.sender, amount), "New TRX transfer failed");

        migrated[msg.sender] = true;
        emit Migrated(msg.sender, amount);
    }

    function stopMigration() external onlyOwner {
        migrationActive = false;
        emit MigrationStatusChanged(false);
    }

    function resumeMigration() external onlyOwner {
        migrationActive = true;
        emit MigrationStatusChanged(true);
    }

    function withdrawOldTRX(address recipient, uint256 amount) external onlyOwner {
        require(oldTRX.transfer(recipient, amount), "Withdrawal failed");
    }

    function withdrawNewTRX(address recipient, uint256 amount) external onlyOwner {
        require(newTRX.transfer(recipient, amount), "Withdrawal failed");
    }
}