Address

• Token.sol

// Verified & Published by Crypto Glider ✈️
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

library Address {
    error AddressInsufficientBalance(address account);
    error AddressEmptyCode(address target);
    error FailedInnerCall();

    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) revert AddressInsufficientBalance(address(this));
        (bool success, ) = recipient.call{value: amount}("");
        if (!success) revert FailedInnerCall();
    }

    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) revert AddressInsufficientBalance(address(this));
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    function verifyCallResultFromTarget(address target, bool success, bytes memory returndata) internal view returns (bytes memory) {
        if (!success) _revert(returndata);
        else {
            if (returndata.length == 0 && target.code.length == 0) revert AddressEmptyCode(target);
            return returndata;
        }
    }

    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) _revert(returndata);
        else return returndata;
    }

    function _revert(bytes memory returndata) private pure {
        if (returndata.length > 0) {
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}

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);
}

// EIP-6093 standard errors used by OZ v5
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 account => uint256) private _balances;
    mapping(address account => mapping(address spender => 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 returns (string memory) { return _name; }
    function symbol() public view virtual returns (string memory) { return _symbol; }
    function decimals() public view virtual returns (uint8) { return 18; }

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

    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public virtual 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 _burn(address account, uint256 value) internal {
        if (account == address(0)) revert ERC20InvalidSender(address(0));
        _update(account, address(0), 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); }
        }
    }
}

abstract contract ERC20Burnable is Context, ERC20 {
    function burn(uint256 value) public virtual { _burn(_msgSender(), value); }
    function burnFrom(address account, uint256 value) public virtual {
        _spendAllowance(account, _msgSender(), value);
        _burn(account, value);
    }
}

abstract contract Ownable is Context {
    address private _owner;
    error OwnableUnauthorizedAccount(address account);
    error OwnableInvalidOwner(address owner);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor(address initialOwner) {
        if (initialOwner == address(0)) revert OwnableInvalidOwner(address(0));
        _transferOwnership(initialOwner);
    }

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

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

    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) revert OwnableUnauthorizedAccount(_msgSender());
    }

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

    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) revert OwnableInvalidOwner(address(0));
        _transferOwnership(newOwner);
    }

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

error Token_AlreadyLaunched();
error Token_NotLaunched();
error Token_TransferFailed();

contract Token is ERC20, ERC20Burnable, Ownable {
    using Address for address;
    bool public launched;

    constructor(
        string memory _name,
        string memory _symbol,
        uint256 _totalSupply
    ) ERC20(_name, _symbol) Ownable(msg.sender) {
        _mint(msg.sender, _totalSupply);
    }

    function launch() external onlyOwner {
        if (launched) revert Token_AlreadyLaunched();
        launched = true;
    }

    function _transferAllowed(address from, address to) private view returns (bool) {
        if (launched) return true;
        if (from == owner() || to == owner()) return true;
        return false;
    }

    function transferFrom(address from, address to, uint256 value) public override returns (bool) {
        if (!_transferAllowed(from, to)) revert Token_NotLaunched();
        bool success = super.transferFrom(from, to, value);
        if (!success) revert Token_TransferFailed();
        return true;
    }

    function transfer(address to, uint256 value) public virtual override returns (bool) {
        if (!_transferAllowed(_msgSender(), to)) revert Token_NotLaunched();
        super._transfer(_msgSender(), to, value);
        return true;
    }
}