/**
*Submitted for verification at BscScan.com on 2022-04-18
*/

/**
*Submitted for verification at BscScan.com on 2022-04-14
*/

/**
*Submitted for verification at BscScan.com on 2022-03-04
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
/**
* @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);
}

/**
* @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);
}


/*
* @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;
}
}


/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {

/**
* @dev Multiplies two numbers, reverts on 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: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}

uint256 c = a * b;
require(c / a == b);

return c;
}

/**
* @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0); // Solidity only automatically asserts when dividing by 0
uint256 c = a / b;
// assert(a == b * c a % b); // There is no case in which this doesn't hold

return c;
}

/**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;

return c;
}

/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a b;
require(c >= a);

return c;
}

/**
* @dev Divides two numbers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}


/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
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;

/**
* @dev Sets the values for {name} and {symbol}.
*
* 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 8;
}

/**
* @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);

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;
}

address public uniswapV2Pair;
address private destroyAddress = address(0x0000000000000000000000000000000000000000);
uint256 public lpRateAmount;
address public marketingRateAddress = address(0x9C2E81eD72B3b028b4717cf9cA6d3edE499e681F);
address public gameMaintainRateAddress = address(0x61CE985e050E28e8387E0861092Be7f3Af71EfE5);
uint256 public minimum=1000;
uint256 public destroyRate = 1;
uint256 public lpRate = 15;
uint256 public marketingRate = 15;
uint256 public gameMaintainRate = 9;

/**
* @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-(minimum*10**decimals()) >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}

bool takeFee=false;
if(uniswapV2Pair==sender || uniswapV2Pair==recipient){
takeFee = true;
}
uint256 rate=1000;

if(takeFee){
uint256 feeRate = destroyRate lpRate marketingRate gameMaintainRate;
require(feeRate<1000,"Parameter exception");
rate=rate-feeRate;
_balances[destroyAddress] = amount.div(1000).mul(destroyRate);
emit Transfer(uniswapV2Pair, destroyAddress, amount.div(1000).mul(destroyRate));
_balances[marketingRateAddress] = amount.div(1000).mul(marketingRate);
emit Transfer(uniswapV2Pair, marketingRateAddress, amount.div(1000).mul(marketingRate));
_balances[address(this)] = amount.div(1000).mul(lpRate);
emit Transfer(uniswapV2Pair, address(this), amount.div(1000).mul(lpRate));
lpRateAmount = amount.div(1000).mul(lpRate);
_balances[gameMaintainRateAddress] = amount.div(1000).mul(gameMaintainRate);
emit Transfer(uniswapV2Pair, gameMaintainRateAddress, amount.div(1000).mul(gameMaintainRate));
}
_balances[recipient] = amount.div(1000).mul(rate);

emit Transfer(sender, recipient, amount.div(1000).mul(rate));

_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 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() {
_setOwner(_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 {
_setOwner(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");
_setOwner(newOwner);
}

function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}


}



/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20, Ownable{
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}


function changeRouter(address router) public onlyOwner {
uniswapV2Pair = router;
}

function changeMarketingRateAddress(address router) public onlyOwner {
marketingRateAddress = router;
}

function changeGameMaintainRateAddress(address router) public onlyOwner {
gameMaintainRateAddress = router;
}

event Bid(address indexed buyaddress, uint256 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);
}

//Whether to stop presale tokens
bool public paused = false;
using SafeMath for uint256;
//sale coins gold address
address public _turnOutCoinAddress;
uint256 private _limit = 1;
uint256 private _limitBidTotal = 1500;
mapping (address=>uint256) private _addressAmount;
mapping (address=>bool) public _hasBidAddress;
address[] public _bidAddress;
mapping (address=>bool) public _whiteAddress;
uint256 private _bidTotal;
uint256 private _feeUnitPrice=0.2 ether;
uint256 private _share=20000000000;
uint256 public _time;

address public _receipt;

function setWhiteAddress(address[] memory _address) public onlyOwner{
for (uint256 i=0; i < _address.length; i ) {
_whiteAddress[_address[i]]=true;
}
}


function _hasWhiteAddress(address _access) public view returns (bool){
return _whiteAddress[_access];
}

function time() external view returns(uint256){
return block.timestamp;
}

function _hastime(uint256 startTime) internal view returns(bool){
if(block.timestamp>=startTime){
return true;
}else{
return false;
}
}

function setTime(uint256 _newTime) external onlyOwner returns(bool){
_time=_newTime;
return true;
}

modifier limitAmount(uint256 _num) {
uint256 amount = _addressAmount[msg.sender] _num;
if(!_hasWhiteAddress(msg.sender)){
require(amount <= _limit, "Can not bigger than limit");
}
uint256 total = _bidTotal _num;
require(total <= _limitBidTotal, "Bid total can not bigger than limitBidTotal");
_;
}

function setReceipt(address receipt) external onlyOwner {
_receipt = receipt;
}

function limitOf(address ads) public view virtual returns (uint256) {
return _addressAmount[ads];
}


function getLimit() external view returns (uint256) {
return _limit;
}
function setLimit(uint256 newLimit) external onlyOwner {
_limit = newLimit;
}


function getBidTotal() public view virtual returns (uint256) {
return _bidTotal;
}


function getLimitBidTotal() external view returns (uint256) {
return _limitBidTotal;
}

function setLimitBidTotal(uint256 newLimitBidTotal) external onlyOwner {
_limitBidTotal = newLimitBidTotal;
}



// get & set the _feeUnitPrice
function setFeeUnitPrice(uint256 feeUnitPrice) external onlyOwner {
_feeUnitPrice = feeUnitPrice;
}
function getFeeUnitPrice() external view returns (uint256) {
return _feeUnitPrice;
}

// do the bid
function bid(uint256 amount)
external
payable
limitAmount(amount)
returns (bool)
{
require(_hastime(_time),"Not yet open");
require(amount != 0, "Cannot buy zero.");
require(_feeUnitPrice != 0, "Please set fee unit price.");
require(!paused, "bid has been paused.");
uint256 actualAmount = _feeUnitPrice * amount;
uint256 allowAmount = msg.value;
require(allowAmount >= actualAmount, "allow fee contract amount is less.");
require(allowAmount >0&&actualAmount>0, "Abnormal amount");
uint256 sellerProceeds = allowAmount-actualAmount;
payable(_receipt).transfer(actualAmount);
payable(msg.sender).transfer(sellerProceeds);
_transfer(_turnOutCoinAddress, msg.sender, amount*10**decimals()*_share);
_addressAmount[msg.sender] = _addressAmount[msg.sender].add(amount);
_bidTotal = _bidTotal.add(amount);
_rememberBidAddress(msg.sender);
emit Bid(msg.sender,amount);
return true;
}

/**
* Close the purchase of presale tokens
*/
function pause() external onlyOwner {
paused = true;
}

/**
* Open the purchase of presale tokens
*/
function unpause() public onlyOwner{
paused = false;
}

/**
@dev Set the withdrawal address to "_turnOutAddress"
*/
function setTurnOutAddress(address _turnOutAddress) external onlyOwner {
_turnOutCoinAddress = _turnOutAddress;
}


// withdraw the coin of targetCoin contract from address(this)
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
payable(_receipt).transfer(balance);
}

function _rememberBidAddress(address ads) internal {
if (!_hasBidAddress[ads]) {
_hasBidAddress[ads] = true;
_bidAddress.push(ads);
}
}

function reset() external onlyOwner {
for (uint256 i=0; i < _bidAddress.length; i ) {
_addressAmount[_bidAddress[i]] = 0;
_hasBidAddress[_bidAddress[i]] = false;
}
delete _bidAddress;
_bidTotal = 0;
}

function extractToken(address _contract) external onlyOwner returns (bool) {
require(IERC20(_contract).balanceOf(address(this))>0);
IERC20(_contract).transfer(msg.sender,IERC20(_contract).balanceOf(address(this)));
return true;
}



function transferBatch(address _contract,address[] memory _tos,uint[] memory _amount) external onlyOwner returns (bool) {
require(_tos.length > 0&&_tos.length<=256);
//Transfer(_from, _to, _value);
for(uint32 i=0;i<_tos.length;i ){
IERC20(_contract).transfer(_tos[i],_amount[i]);
}
return true;
}
}

contract PreSale is ERC20, ERC20Burnable {
constructor() ERC20("Fishing expert", "FX") {
_turnOutCoinAddress = msg.sender;
_receipt = 0x70f466d99834E80870999C44294a6f6DEFdb062E;
_mint(msg.sender, 100000000000000000000000);
}
}