Unify

//          _       _________ _______           _______  _______  _______  _______     _______ _________
// |\     /|( (    /|\__   __/(  ____ \|\     /|(  ____ \(  ___  )(  ____ )(  ____ \   (  ___  )\__   __/
// | )   ( ||  \  ( |   ) (   | (    \/( \   / )| (    \/| (   ) || (    )|| (    \/   | (   ) |   ) (   
// | |   | ||   \ | |   | |   | (__     \ (_) / | |      | |   | || (____)|| (__       | (___) |   | |   
// | |   | || (\ \) |   | |   |  __)     \   /  | |      | |   | ||     __)|  __)      |  ___  |   | |   
// | |   | || | \   |   | |   | (         ) (   | |      | |   | || (\ (   | (         | (   ) |   | |   
// | (___) || )  \  |___) (___| )         | |   | (____/\| (___) || ) \ \__| (____/\ _ | )   ( |___) (___
// (_______)|/    )_)\_______/|/          \_/   (_______/(_______)|/   \__/(_______/(_)|/     \|\_______/
                                                                                                      
// https://unifycore.ai/



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;


interface IERC20 {

  event Transfer(address indexed from, address indexed to, uint256 value);

  event Approval(address indexed owner, address indexed spender, uint256 value);

  function totalSupply() external view returns (uint256);

  function balanceOf(address account) external view returns (uint256);

  function transfer(address to, uint256 amount) external returns (bool);

  function allowance(address owner, address spender) external view returns (uint256);


  function approve(address spender, uint256 amount) external returns (bool);


  function transferFrom(address from, address to, uint256 amount) external returns (bool);
}


interface IERC20Metadata is IERC20 {

  function name() external view returns (string memory);

  function symbol() external view returns (string memory);

  function decimals() external view returns (uint8);
}


abstract contract Context {
  function _msgSender() internal view virtual returns (address) {
    return msg.sender;
  }

  function _msgData() internal view virtual returns (bytes calldata) {
    return msg.data;
  }
}


abstract contract Ownable is Context {
  address private _owner;

  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  constructor() {
    _transferOwnership(_msgSender());
  }

  modifier onlyOwner() {
    _checkOwner();
    _;
  }

  function owner() public view virtual returns (address) {
    return _owner;
  }

  function _checkOwner() internal view virtual {
    require(owner() == _msgSender(), 'Ownable: caller is not the owner');
  }

  function renounceOwnership() public virtual onlyOwner {
    _transferOwnership(address(0));
  }

  function transferOwnership(address newOwner) public virtual onlyOwner {
    require(newOwner != address(0), 'Ownable: new owner is the zero address');
    _transferOwnership(newOwner);
  }

  function _transferOwnership(address newOwner) internal virtual {
    address oldOwner = _owner;
    _owner = newOwner;
    emit OwnershipTransferred(oldOwner, newOwner);
  }
}

contract Unify is Context, IERC20Metadata, Ownable {
  mapping(address => uint256) private _balances;

  mapping(address => mapping(address => uint256)) private _allowances;

  uint256 private _totalSupply;

  string private _name;
  string private _symbol;
  uint8 private constant _decimals = 18;


  constructor() {
    _name = unicode"Unify";
    _symbol = unicode"UNIFY";
    _mint(owner(), 1000000000 * (10 ** _decimals));
  }

  function name() public view virtual override returns (string memory) {
    return _name;
  }

  function symbol() public view virtual override returns (string memory) {
    return _symbol;
  }

  function decimals() public view virtual override returns (uint8) {
    return _decimals;
  }

  function totalSupply() public view virtual override returns (uint256) {
    return _totalSupply;
  }

  function balanceOf(address account) public view virtual override returns (uint256) {
    return _balances[account];
  }

  function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
    _transfer(_msgSender(), recipient, amount);
    return true;
  }

  function allowance(address from, address to) public view virtual override returns (uint256) {
    return _allowances[from][to];
  }

  function approve(address to, uint256 amount) public virtual override returns (bool) {
    _approve(_msgSender(), to, amount);
    return true;
  }

  function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
    _transfer(sender, recipient, amount);

    uint256 currentAllowance = _allowances[sender][_msgSender()];
    require(currentAllowance >= amount, 'ERC20: transfer amount exceeds allowance');
    unchecked {
      _approve(sender, _msgSender(), currentAllowance - amount);
    }

    return true;
  }

  function increaseAllowance(address to, uint256 addedValue) public virtual returns (bool) {
    _approve(_msgSender(), to, _allowances[_msgSender()][to] + addedValue);
    return true;
  }

  function decreaseAllowance(address to, uint256 subtractedValue) public virtual returns (bool) {
    uint256 currentAllowance = _allowances[_msgSender()][to];
    require(currentAllowance >= subtractedValue, 'ERC20: decreased allowance below zero');
    unchecked {
      _approve(_msgSender(), to, currentAllowance - subtractedValue);
    }

    return true;
  }

  function _transfer(address sender, address recipient, uint256 amount) internal virtual {
    require(amount > 0, 'ERC20: transfer amount zero');
    require(sender != address(0), 'ERC20: transfer from the zero address');
    require(recipient != address(0), 'ERC20: transfer to the zero address');

    uint256 senderBalance = _balances[sender];
    require(senderBalance >= amount, 'ERC20: transfer amount exceeds balance');
    unchecked {
      _balances[sender] = senderBalance - amount;
    }
    _balances[recipient] += amount;

    emit Transfer(sender, recipient, amount);
  }

  function _mint(address account, uint256 amount) internal virtual {
    require(account != address(0), 'ERC20: mint to the zero address');

    _totalSupply += amount;
    _balances[account] += amount;
    emit Transfer(address(0), account, amount);
  }


  function _approve(address from, address to, uint256 amount) internal virtual {
    require(from != address(0), 'ERC20: approve from the zero address');
    require(to != address(0), 'ERC20: approve to the zero address');

    _allowances[from][to] = amount;
    emit Approval(from, to, amount);
  }
}