CrosschainERC20.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract CrossChainToken is ERC20, Ownable {
    
    // Bridge event
    event Bridge(address indexed user, uint256 amount);
    // Mint event
    event Mint(address indexed to, uint256 amount);

    /**
     * @param name Token Name
     * @param symbol Token Symbol
     * @param totalSupply Token Supply
     */
    constructor(
        string memory name,
        string memory symbol,
        uint256 totalSupply
    ) payable ERC20(name, symbol) {
        _mint(msg.sender, totalSupply);
    }

    /**
     * Bridge function
     * @param amount: burn amount of token on the current chain and mint on the other chain
     */
    function bridge(uint256 amount) public {
        _burn(msg.sender, amount);
        emit Bridge(msg.sender, amount);
    }

    /**
     * Mint function
     */
    function mint(address to, uint amount) external onlyOwner {
        _mint(to, amount);
        emit Mint(to, amount);
    }
}