/** *Submitted for verification at BscScan.com on 2025-06-27 */ // SPDX-License-Identifier: MIT pragma solidity ^0.8.24; // OpenZeppelin Contracts (last updated v5.3.0) abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } 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 value) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) 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); } interface IERC20Errors { error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); error ERC20InvalidSender(address sender); error ERC20InvalidReceiver(address receiver); error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); error ERC20InvalidApprover(address approver); error ERC20InvalidSpender(address spender); } abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } 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 18; } 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 to, uint256 value) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 value) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); return true; } function transferFrom(address from, address to, uint256 value) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) revert ERC20InvalidSender(address(0)); if (to == address(0)) revert ERC20InvalidReceiver(address(0)); _update(from, to, value); } function _update(address from, address to, uint256 value) internal virtual { if (from == address(0)) { _totalSupply += value; } else { uint256 fromBalance = _balances[from]; if (fromBalance < value) revert ERC20InsufficientBalance(from, fromBalance, value); unchecked { _balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { _totalSupply -= value; } } else { unchecked { _balances[to] += value; } } emit Transfer(from, to, value); } function _mint(address account, uint256 value) internal { if (account == address(0)) revert ERC20InvalidReceiver(address(0)); _update(address(0), account, value); } function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual { if (owner == address(0)) revert ERC20InvalidApprover(address(0)); if (spender == address(0)) revert ERC20InvalidSpender(address(0)); _allowances[owner][spender] = value; if (emitEvent) emit Approval(owner, spender, value); } function _spendAllowance(address owner, address spender, uint256 value) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance < type(uint256).max) { if (currentAllowance < value) revert ERC20InsufficientAllowance(spender, currentAllowance, value); unchecked { _approve(owner, spender, currentAllowance - value, false); } } } } contract BOYMATToken is ERC20 { constructor() ERC20("BOYMAT", "BYT") { _mint(msg.sender, 1000000000 * 10 ** decimals()); } }
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