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mesutt000/README.md

/** *Submitted for verification at BscScan.com on 2020-09-29 */

// File: contracts/IBEP20.sol

pragma solidity ^0.6.0;

interface IBEP20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256);

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

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

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

/**
 * @dev Returns the bep token owner.
 */
function getOwner() external view returns (address);

/**
 * @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);

}

// File: openzeppelin-solidity/contracts/GSN/Context.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/*

  • @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 GSN 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 payable) { return msg.sender; }

    function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see ethereum/solidity#2691 return msg.data; } }

// File: openzeppelin-solidity/contracts/math/SafeMath.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**

  • @dev Wrappers over Solidity's arithmetic operations with added overflow

  • checks.

  • Arithmetic operations in Solidity wrap on overflow. This can easily result

  • in bugs, because programmers usually assume that an overflow raises an

  • error, which is the standard behavior in high level programming languages.

  • SafeMath restores this intuition by reverting the transaction when an

  • operation overflows.

  • Using this library instead of the unchecked operations eliminates an entire

  • class of bugs, so it's recommended to use it always. / library SafeMath { /*

    • @dev Returns the addition of two unsigned integers, reverting on

    • overflow.

    • Counterpart to Solidity's + operator.

    • Requirements:

      • Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow");

      return c; }

    /**

    • @dev Returns the subtraction of two unsigned integers, reverting on
    • overflow (when the result is negative).
    • Counterpart to Solidity's - operator.
    • Requirements:
      • Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); }

    /**

    • @dev Returns the subtraction of two unsigned integers, reverting with custom message on

    • overflow (when the result is negative).

    • Counterpart to Solidity's - operator.

    • Requirements:

      • Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b;

      return c; }

    /**

    • @dev Returns the multiplication of two unsigned integers, reverting on

    • overflow.

    • Counterpart to Solidity's * operator.

    • Requirements:

      • Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: OpenZeppelin/openzeppelin-contracts#522 if (a == 0) { return 0; }

      uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow");

      return c; }

    /**

    • @dev Returns the integer division of two unsigned integers. Reverts on
    • division by zero. The result is rounded towards zero.
    • Counterpart to Solidity's / operator. Note: this function uses a
    • revert opcode (which leaves remaining gas untouched) while Solidity
    • uses an invalid opcode to revert (consuming all remaining gas).
    • Requirements:
      • The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); }

    /**

    • @dev Returns the integer division of two unsigned integers. Reverts with custom message on

    • division by zero. The result is rounded towards zero.

    • Counterpart to Solidity's / operator. Note: this function uses a

    • revert opcode (which leaves remaining gas untouched) while Solidity

    • uses an invalid opcode to revert (consuming all remaining gas).

    • Requirements:

      • The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold

      return c; }

    /**

    • @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
    • Reverts when dividing by zero.
    • Counterpart to Solidity's % operator. This function uses a revert
    • opcode (which leaves remaining gas untouched) while Solidity uses an
    • invalid opcode to revert (consuming all remaining gas).
    • Requirements:
      • The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); }

    /**

    • @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
    • Reverts with custom message when dividing by zero.
    • Counterpart to Solidity's % operator. This function uses a revert
    • opcode (which leaves remaining gas untouched) while Solidity uses an
    • invalid opcode to revert (consuming all remaining gas).
    • Requirements:
      • The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }

// File: openzeppelin-solidity/contracts/proxy/Initializable.sol

// SPDX-License-Identifier: MIT

pragma solidity >=0.4.24 <0.7.0;

/**

  • @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed

  • behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an

  • external initializer function, usually called initialize. It then becomes necessary to protect this initializer

  • function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.

  • TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as

  • possible by providing the encoded function call as the _data argument to {UpgradeableProxy-constructor}.

  • CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure

  • that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. */ abstract contract Initializable {

    /**

    • @dev Indicates that the contract has been initialized. */ bool private _initialized;

    /**

    • @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing;

    /**

    • @dev Modifier to protect an initializer function from being invoked twice. */ modifier initializer() { require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");

      bool isTopLevelCall = !_initializing; if (isTopLevelCall) { _initializing = true; _initialized = true; }

      _;

      if (isTopLevelCall) { _initializing = false; } }

    /// @dev Returns true if and only if the function is running in the constructor function _isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; // solhint-disable-next-line no-inline-assembly assembly { cs := extcodesize(self) } return cs == 0; } }

// File: contracts/BEP20TokenImplementation.sol

pragma solidity ^0.6.0;

contract BEP20TokenImplementation is Context, IBEP20, Initializable { using SafeMath for uint256;

mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;

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

bool private _mintable;

constructor() public {
}

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

/**
 * @dev sets initials supply and the owner
 */
function initialize(string memory name, string memory symbol, uint8 decimals, uint256 amount, bool mintable, address owner) public initializer {
    _owner = owner;
    _name = name;
    _symbol = symbol;
    _decimals = decimals;
    _mintable = mintable;
    _mint(owner, amount);
}

/**
* @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 onlyOwner {
    emit OwnershipTransferred(_owner, address(0));
    _owner = 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 onlyOwner {
    require(newOwner != address(0), "Ownable: new owner is the zero address");
    emit OwnershipTransferred(_owner, newOwner);
    _owner = newOwner;
}

/**
 * @dev Returns if the token is mintable or not
 */
function mintable() external view returns (bool) {
    return _mintable;
}

/**
 * @dev Returns the bep token owner.
 */
function getOwner() external override view returns (address) {
    return _owner;
}

/**
 * @dev Returns the token decimals.
 */
function decimals() external override view returns (uint8) {
    return _decimals;
}

/**
 * @dev Returns the token symbol.
 */
function symbol() external override view returns (string memory) {
    return _symbol;
}

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

/**
 * @dev See {BEP20-totalSupply}.
 */
function totalSupply() external override view returns (uint256) {
    return _totalSupply;
}

/**
 * @dev See {BEP20-balanceOf}.
 */
function balanceOf(address account) external override view returns (uint256) {
    return _balances[account];
}

/**
 * @dev See {BEP20-transfer}.
 *
 * Requirements:
 *
 * - `recipient` cannot be the zero address.
 * - the caller must have a balance of at least `amount`.
 */
function transfer(address recipient, uint256 amount) external override returns (bool) {
    _transfer(_msgSender(), recipient, amount);
    return true;
}

/**
 * @dev See {BEP20-allowance}.
 */
function allowance(address owner, address spender) external override view returns (uint256) {
    return _allowances[owner][spender];
}

/**
 * @dev See {BEP20-approve}.
 *
 * Requirements:
 *
 * - `spender` cannot be the zero address.
 */
function approve(address spender, uint256 amount) external override returns (bool) {
    _approve(_msgSender(), spender, amount);
    return true;
}

/**
 * @dev See {BEP20-transferFrom}.
 *
 * Emits an {Approval} event indicating the updated allowance. This is not
 * required by the EIP. See the note at the beginning of {BEP20};
 *
 * 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) external override returns (bool) {
    _transfer(sender, recipient, amount);
    _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: 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 {BEP20-approve}.
 *
 * Emits an {Approval} event indicating the updated allowance.
 *
 * Requirements:
 *
 * - `spender` cannot be the zero address.
 */
function increaseAllowance(address spender, uint256 addedValue) public 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 {BEP20-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 returns (bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero"));
    return true;
}

/**
 * @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
 * the total supply.
 *
 * Requirements
 *
 * - `msg.sender` must be the token owner
 * - `_mintable` must be true
 */
function mint(uint256 amount) public onlyOwner returns (bool) {
    require(_mintable, "this token is not mintable");
    _mint(_msgSender(), amount);
    return true;
}

/**
  • @dev Burn amount tokens and decreasing the total supply. */ function burn(uint256 amount) public returns (bool) { _burn(_msgSender(), amount); 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 {
    require(sender != address(0), "BEP20: transfer from the zero address");
    require(recipient != address(0), "BEP20: transfer to the zero address");

    _balances[sender] = _balances[sender].sub(amount, "BEP20: 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 {
    require(account != address(0), "BEP20: mint to the zero address");

    _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 {
    require(account != address(0), "BEP20: burn from the zero address");

    _balances[account] = _balances[account].sub(amount, "BEP20: 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 is 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 {
    require(owner != address(0), "BEP20: approve from the zero address");
    require(spender != address(0), "BEP20: approve to the zero address");

    _allowances[owner][spender] = amount;
    emit Approval(owner, spender, amount);
}

/**
 * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
 * from the caller's allowance.
 *
 * See {_burn} and {_approve}.
 */
function _burnFrom(address account, uint256 amount) internal {
    _burn(account, amount);
    _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "BEP20: burn amount exceeds allowance"));
}

}

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