// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @title ERC20Metadata
 * @author @lozzereth (www.allthingsweb3.com)
 * @notice ERC20Metadata implementation isolates metadata related code.
 */
abstract contract ERC20Metadata is IERC20Metadata {
    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name}, {symbol} and {totalSupply}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ERC20Metadata} from "./ERC20Metadata.sol";

/**
 * @title ERC20Taxable
 * @author @lozzereth (www.allthingsweb3.com)
 * @notice ERC20Burnable implementation that has an adjustable transfer tax.
 */
contract ERC20Taxable is Ownable, IERC20, ERC20Metadata {
    /// @dev Track balances of tokens
    mapping(address => uint256) private _balances;

    /// @dev Track allowances of the token
    mapping(address => mapping(address => uint256)) private _allowances;

    /// @dev Token total supply
    uint256 private _totalSupply;

    /// @dev Percentage tax
    uint256 public tax;

    /// @dev Tax exempt sending addresses
    mapping(address => bool) private _taxExemptSender;

    /// @dev Tax exempt receiving addresses
    mapping(address => bool) private _taxExemptReceiver;

    /// @dev Tax revenue recipient
    address private _taxRevenueRecipient;

    /**
     * @dev Sets the values for {name}, {symbol} and {totalSupply}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_)
        ERC20Metadata(name_, symbol_)
    {
        address taxman = address(this);
        _taxRevenueRecipient = taxman;
        _taxExemptSender[taxman] = true;
        _taxExemptReceiver[taxman] = true;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply()
        public
        view
        virtual
        override(IERC20)
        returns (uint256)
    {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account)
        public
        view
        virtual
        override
        returns (uint256)
    {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender)
        public
        view
        virtual
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    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;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] + addedValue
        );
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(
            currentAllowance >= subtractedValue,
            "ERC20: decreased allowance below zero"
        );
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    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"
        );

        unchecked {
            uint256 receivingAmount = amount;

            if (
                tax > 0 &&
                !_taxExemptReceiver[recipient] &&
                !_taxExemptSender[sender]
            ) {
                receivingAmount = (receivingAmount * (10000 - tax)) / 10000;
                uint256 taxedAmount = amount - receivingAmount;
                _balances[_taxRevenueRecipient] += taxedAmount;
                emit Transfer(sender, _taxRevenueRecipient, taxedAmount);
            }

            _balances[sender] = senderBalance - amount;
            _balances[recipient] += receivingAmount;

            emit Transfer(sender, recipient, receivingAmount);
            _afterTokenTransfer(sender, recipient, amount);
        }
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    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), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    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");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    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);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 currentAllowance = allowance(account, _msgSender());
        require(
            currentAllowance >= amount,
            "ERC20: burn amount exceeds allowance"
        );
        unchecked {
            _approve(account, _msgSender(), currentAllowance - amount);
        }
        _burn(account, amount);
    }

    /**
     * @dev Sets the transfer tax.
     *
     * - 10000 = 100.00%
     * - 125 = 1.25%
     */
    function setTransferTax(uint256 _percent) external onlyOwner {
        require(
            _percent >= 0 && _percent <= 10000,
            "ERC20Taxable: Invalid Percent"
        );
        tax = _percent;
    }

    /**
     * @dev Sets the recipient for all transfer tax revenue.
     * @param _address The recipient
     */
    function setTaxRevenueRecipient(address _address) external onlyOwner {
        _taxRevenueRecipient = _address;
    }

    /**
     * @dev Set addresses as tax exempt
     * @param flag  The flag that will determine which type of exemption is set
     *              - 0: Receiver
     *              - 1: Sender
     *              - 2: Receiver and Sender
     * @param addresses The addresses to action
     * @param _toggle The final state
     */
    function setTaxExemptions(
        uint256 flag,
        address[] memory addresses,
        bool _toggle
    ) external onlyOwner {
        for (uint256 a; a < addresses.length; ++a) {
            address _address = addresses[a];
            if (flag == 0) {
                _taxExemptReceiver[_address] = _toggle;
            } else if (flag == 1) {
                _taxExemptSender[_address] = _toggle;
            } else if (flag == 2) {
                _taxExemptReceiver[_address] = _toggle;
                _taxExemptSender[_address] = _toggle;
            }
        }
    }

    /**
     * @dev Withdraw tokens held within the contract
     */
    function withdraw() external onlyOwner {
        _transfer(address(this), _msgSender(), _balances[address(this)]);
    }

    /**
     * @dev Get tax exemption status of an address
     * @return exemption (sender exempt, receiving exempt)
     */
    function taxExemptionOf(address _address) public view returns (bool, bool) {
        return (_taxExemptSender[_address], _taxExemptReceiver[_address]);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {ERC20Taxable} from "./extensions/ERC20Taxable.sol";

/**
 * MMMMMMMMMMMMMMMMMMWWWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
 * MMMMMMMMMMMMMWXOxdlllloxOKNWNXXK000OOO000KXXX0OOkOO0XWMMMMMMMMMMMMMMMM
 * MMMMMMMMMMMW0o:,''''''''';cc:;;,,,'''''',,;;;,''''',;cd0WMMMMMMMMMMMMM
 * MMMMMMMMMMNx;'''''''''''''''''''''''''''''''''''''''''',dXMMMMMMMMMMMM
 * MMMMMMMMMM0:',lol;'.';cllc,',''',,,,,''''',''''''''''''''dNMMMMMMMMMMM
 * MMMMMMMMMM0c':kkc'';;;d00x;'',,'','''''',lxl,....,:cll;'';xXWMMMMMMMMM
 * MMMMMMMMMMXo';dx;.':;'lOkc,'',,,,,'''''';dOc'.;c;,o00Ol'''':xXMMMMMMMM
 * MMMMMMMMMWO:'';:,'..'';::,',''''','''''',cd;..,:,,d0Od;''''''lKWMMMMMM
 * MMMMMMMMMKl,''''''''','''',,',,',,'''''''','''''',clc,''''''''cKMMMMMM
 * MMMMMMMMNd,''''','''''''''''''''''',,,'''''''''''''''''''''''''dNMMMMM
 * MMMMMMMWk;'','''''''''''''''''''''''''''''''''''','','','''''''cKMMMMM
 * MMMMMMW0c,','',''''''''''''''',,,,'''''''''''''',,,,;;;,,''''''cKMMMMM
 * MMMMMNkl::;,,,,,,'''''''''''''''',''''''',,,,;;::ccccllc;''''''oNMMMMM
 * MMMMMXo:lllllc:;;;;,,,,,,,,,,,,,,,;;;;::::::ccccllllllc;,''''':OMMMMMM
 * MMMMMWx:cccccccccc::::::::::::::::::::ccccccccllllcc:;,'''''';kWMMMMMM
 * MMMMMW0occlllllcccccccccccccccccccccclllllllcc::;,,,'''''''':OWMMMMMMM
 * MMMMMMWN0xoc:::::ccccclllllllccccccc::::;;,,,,'''''''''''',oKWMMMMMMMM
 * MMMMMMMMMMWX0koc,'',,,,,,,,,,,,,,,''''''',,''''''''''''';o0WMMMMMMMMMM
 * MMMMMMMMMMMMMMWN0xo;'''''''''''''''''''''''''''''''.';lxKWMMMMMMMMMMMM
 * MMMMMMMMMMMMMMMMMMWKko:,''''''''''''''''''''''.',;cdkKWMMMMMMMMMMMMMMM
 * MMMMMMMMMMMMMMMMMMMMMWNKOxolc:;,,'''''',,,;:codk0XWMMMMMMMMMMMMMMMMMMM
 * MMMMMMMMMMMMMMMMMMMMMMMMMMMWNNXK000OOO00KKXNWMMMMMMMMMMMMMMMMMMMMMMMMM
 * MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
 *
 * @title FrogCoin
 * @custom:website www.plaguenft.com
 * @author @lozzereth (www.allthingsweb3.com)
 * @notice ERC20 implementation with variable, but optional, transfers taxing.
 */
contract FrogCoin is ERC20Taxable {
    constructor(
        string memory name,
        string memory symbol,
        uint256 totalSupply_
    ) ERC20Taxable(name, symbol) {
        _mint(msg.sender, totalSupply_);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

{
  "compilationTarget": {
    "contracts/FrogCoin.sol": "FrogCoin"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "remappings": []
}