// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract GetMargin {
    string public name = "Get Margin";
    string public symbol = "GM";
    uint8 public decimals = 18;
    uint256 public totalSupply = 200_000_000 * 10 ** uint256(decimals);

    address public owner;
    bool public paused = false;

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Paused(address account);
    event Unpaused(address account);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

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

    modifier whenNotPaused() {
        require(!paused, "Token transfer while paused");
        _;
    }

    constructor() {
        owner = msg.sender;
        balanceOf[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

    function transferOwnership(address newOwner) external onlyOwner {
        require(newOwner != address(0), "New owner is the zero address");
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

    function pause() external onlyOwner {
        paused = true;
        emit Paused(msg.sender);
    }

    function unpause() external onlyOwner {
        paused = false;
        emit Unpaused(msg.sender);
    }

    function transfer(address to, uint256 value) public whenNotPaused returns (bool success) {
        require(to != address(0), "Transfer to the zero address");
        require(balanceOf[msg.sender] >= value, "Insufficient balance");

        balanceOf[msg.sender] -= value;
        balanceOf[to] += value;
        
        emit Transfer(msg.sender, to, value);
        return true;
    }

    function approve(address spender, uint256 value) public returns (bool success) {
        require(spender != address(0), "Approve to the zero address");

        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool success) {
        require(to != address(0), "Transfer to the zero address");
        require(value <= balanceOf[from], "Insufficient balance");
        require(value <= allowance[from][msg.sender], "Allowance exceeded");

        balanceOf[from] -= value;
        balanceOf[to] += value;
        allowance[from][msg.sender] -= value;

        emit Transfer(from, to, value);
        return true;
    }
}

{
  "compilationTarget": {
    "GetMargin.sol": "GetMargin"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}