search

Dorratoken / Dorra

0 stars 0 forks source link

readme

/* Submitted for verification at BscScan.com on 2021-11-21 */

// Dependency file: @openzeppelin/contracts/token/ERC20/IERC20.sol

// SPDX-License-Identifier: MIT

// pragma solidity ^0.8.0;

/**

// Dependency file: @openzeppelin/contracts/utils/Context.sol

// pragma solidity ^0.8.0;

/**

// Dependency file: @openzeppelin/contracts/access/Ownable.sol

// pragma solidity ^0.8.0;

// import "@openzeppelin/contracts/utils/Context.sol";

/**

// Dependency file: @openzeppelin/contracts/utils/math/SafeMath.sol

// pragma solidity ^0.8.0;

// CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks.

/**

// Dependency file: contracts/BaseToken.sol

// pragma solidity =0.8.4;

enum TokenType { standard, antiBotStandard, liquidityGenerator, antiBotLiquidityGenerator, baby, antiBotBaby, buybackBaby, antiBotBuybackBaby }

abstract contract BaseToken { event TokenCreated( address indexed owner, address indexed token, TokenType tokenType, uint256 version ); }

// Root file: contracts/standard/StandardToken.sol

pragma solidity =0.8.4;

// import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; // import "@openzeppelin/contracts/access/Ownable.sol"; // import "@openzeppelin/contracts/utils/math/SafeMath.sol"; // import "contracts/BaseToken.sol";

contract StandardToken is IERC20, Ownable, BaseToken { using SafeMath for uint256;

uint256 public constant VERSION = 1;

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

string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;

constructor(
    string memory name_,
    string memory symbol_,
    uint8 decimals_,
    uint256 totalSupply_,
    address serviceFeeReceiver_,
    uint256 serviceFee_
) payable {
    _name = name_;
    _symbol = symbol_;
    _decimals = decimals_;
    _mint(owner(), totalSupply_);

    emit TokenCreated(owner(), address(this), TokenType.standard, VERSION);

    payable(serviceFeeReceiver_).transfer(serviceFee_);
}

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

/**
 * @dev Returns the symbol of the token, usually a shorter version of the
 * name.
 */
function symbol() public view virtual 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 {_setupDecimals} is
 * called.
 *
 * 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 returns (uint8) {
    return _decimals;
}

/**
 * @dev See {IERC20-totalSupply}.
 */
function totalSupply() public view virtual override 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);
    _approve(
        sender,
        _msgSender(),
        _allowances[sender][_msgSender()].sub(
            amount,
            "ERC20: transfer amount exceeds allowance"
        )
    );
    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].add(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)
{
    _approve(
        _msgSender(),
        spender,
        _allowances[_msgSender()][spender].sub(
            subtractedValue,
            "ERC20: decreased allowance below zero"
        )
    );
    return true;
}

/**
 * @dev Moves tokens `amount` from `sender` to `recipient`.
 *
 * This is 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);

    _balances[sender] = _balances[sender].sub(
        amount,
        "ERC20: transfer amount exceeds balance"
    );
    _balances[recipient] = _balances[recipient].add(amount);
    emit Transfer(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:
 *
 * - `to` 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 = _totalSupply.add(amount);
    _balances[account] = _balances[account].add(amount);
    emit Transfer(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);

    _balances[account] = _balances[account].sub(
        amount,
        "ERC20: burn amount exceeds balance"
    );
    _totalSupply = _totalSupply.sub(amount);
    emit Transfer(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 Sets {decimals} to a value other than the default one of 18.
 *
 * WARNING: This function should only be called from the constructor. Most
 * applications that interact with token contracts will not expect
 * {decimals} to ever change, and may work incorrectly if it does.
 */
function _setupDecimals(uint8 decimals_) internal virtual {
    _decimals = decimals_;
}

/**
 * @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 to 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 {}

}