// File: Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// File: BFYCLaunchpad.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.11;


import "./Ownable.sol";
import "./Address.sol";
import "./IERC20.sol";

contract BFYCPresale is Ownable {
    using Address for address payable;
    
    IERC20 public token;
    address public payee;
    address public creator;
    address public operator;
    
    bool public swapStatus;
    bool public canClaim;
    bool public isWhiteListEnabled;
    bool public cancelled;

    uint256 public swapRate; //Tokens to be swapped per BNB
    uint256 public launchRate; // Tokens per BNB for LP
    uint256 public totalSold; // Total tokens sold
    uint256 public decimalsModifier;
    uint256 public minBuy; // Minimum BNBs to be purchased
    uint256 public maxBuy; // Maximum BNBs to be purchased
    uint256 public softCap; // Minimum BNBs to be raised for finalizing presale
    uint256 public hardCap; // Maximum BNBs to be raised
    uint256 public startTime; // Presale Start time
    uint256 public endTime; // Presale End Time
    uint256 public percentFundsToAddToLP;

    uint256 public totalRaised;
    
    mapping (address => uint256) public spent;
    mapping (address => uint256) public owed;
    mapping (address => uint256) public claimed;
    mapping(address => bool) public isWhiteListed;

    string public tokenLogo;
    string public telegram;
    string public website;
    string public twitter;
    string public reddit;
    string public github;
    string public instagram;

    struct presaleInfo {
        string tokenLogo;
        string telegram;
        string website;
        string twitter;
        string reddit;
        string github;
        string instagram;
        bool isWhiteListEnabled;
        bool cancelled;
    }

    event AddedToWhiteList(address indexed whitelistAddress);
    event RemovedFromWhiteList(address indexed removedAddress);
    event Swap (address indexed user, uint256 inAmount, uint256 owedAmount);
    event Claim (address indexed user, uint256 amount);
    event PayeeTransferred (address indexed previousPayee, address indexed newPayee);
    event refundClaimed (address indexed user, uint256 refundAmount);

    constructor (address _operator) {
        operator = _operator;
        payee = msg.sender;
    }

    modifier onlyOwnerOrOperator {
        require(msg.sender == operator || msg.sender == owner(), "TokenPresale: only accessible by operator or owner");
        _;
    }

    function createPresale(
        address _creator, 
        IERC20 _token, 
        uint256 _swapRate,
        uint256 _launchRate, 
        uint256 _minBuy, 
        uint256 _maxBuy, 
        uint256 _softCap, 
        uint256 _hardCap, 
        uint256 _startTime, 
        uint256 _endTime,
        uint256 _percentFundsToAddToLP, 
        bool doSafetyCheck) external onlyOwnerOrOperator {
        require (address(_token) != address(0), "Error: Can't set token to zero address");
        require (_creator != address(0), "Error: Can't set payee to zero address");
        require (_startTime >= block.timestamp, "TokenPresale: opening time can't be in the past"); // solhint-disable-line not-rely-on-time
        require (_endTime > _startTime, "TokenPresale: closing time can't be before opening time");
        require (_percentFundsToAddToLP >= 70, "Alert! You need to add at least 70% of raised funds to LP!");
        require(!cancelled, "Error: Can't recreate a cancelled presale!");

        if (doSafetyCheck) {
            require (IERC20(_token).balanceOf(address(this)) >= (_launchRate * ((_percentFundsToAddToLP * _hardCap)/100)) +  (_hardCap * _swapRate), 
                "Error: Not enough tokens owned to create presale. Deposit tokens to presale contract before calling this function");
        }

        token = _token;
        creator = _creator;
        swapRate = _swapRate;
        launchRate = _launchRate;
        minBuy = _minBuy;
        maxBuy = _maxBuy;
        softCap = _softCap;
        hardCap = _hardCap;
        startTime = _startTime;
        endTime = _endTime;
        percentFundsToAddToLP = _percentFundsToAddToLP;
        swapStatus = true;
        decimalsModifier = 10**18 * 10**_token.decimals();
    }

    function configurePresale(
        bool _isWhiteListEnabled,
        string memory logo,
        string memory _telegram,
        string memory _website,
        string memory _twitter,
        string memory _reddit,
        string memory _github,
        string memory _instagram) external onlyOwnerOrOperator {            
        require(!cancelled, "Error: Can't configure a cancelled presale!");
        isWhiteListEnabled = _isWhiteListEnabled;
        tokenLogo = logo;
        telegram = _telegram;
        website = _website;
        twitter = _twitter;
        reddit = _reddit;
        github = _github;
        instagram = _instagram;
    }

    function cancelPresale() external onlyOwnerOrOperator {
        require (totalRaised < softCap, "TokenPresale: SoftCap has been reached, can't be cancelled now!");
        require(!cancelled, "Error: Presale already cancelled!");
        
            cancelled = true; // if we've already received payment then we need to officially cancel so refunds can be claimed. Cancelled presale contracts can't be re-used.
        
            swapRate = 0; 
            creator = address(0); 
            hardCap = 0; 
            softCap = 0;
            minBuy = 0;
            maxBuy = 0; 
            startTime = 0;
            endTime = 0;
    }

    function swap() external payable {
        require(startTime <= block.timestamp, "Error: Presale has not begun yet!");
        require(swapStatus == true, "Error: Swap disabled!");
        require(spent[msg.sender] + msg.value <= maxBuy, "Error: Reached Max Buy, can't buy more from this wallet!");
        require(!isWhiteListEnabled || isWhiteListed[_msgSender()],"Error: you are not whitelisted");
        require(totalRaised < hardCap, "Alert: HardCap reached!");
        require(!cancelled, "Error: Can't participate in a cancelled presale!");

        uint256 quota = token.balanceOf (address(this));
        uint256 outAmount = (msg.value * swapRate * decimalsModifier) / 10**36;

        require (totalSold + outAmount <= quota, "Error: Not enough tokens remaining");
        
        totalSold += outAmount;
        totalRaised += msg.value;
        // payable(payee).sendValue (msg.value);
        spent[msg.sender] += msg.value;
        owed[msg.sender] += outAmount;
        emit Swap (msg.sender, msg.value, outAmount);
    }

    function claim() external {
        require (canClaim == true, "Error: Presale hasn't been finalized yet");
        require(!cancelled, "Error: Can't claim tokens from a cancelled presale!");
        uint256 quota = token.balanceOf (address(this));
        uint256 owedNow = owed[msg.sender];

        if (owedNow > owed[msg.sender])
            owedNow = owed[msg.sender];

        require (owedNow - claimed[msg.sender] <= quota, "Error: Not enough tokens remaining");
        require (owedNow - claimed[msg.sender] > 0, "Error: No tokens left to claim");

        uint256 amount = owedNow - claimed[msg.sender];
        claimed[msg.sender] = owedNow;
        token.transfer (msg.sender, amount);

        emit Claim (msg.sender, amount);
    }

    // Used to claim a refund if the presale is unsuccessful
    // Users should be aware that if the payment token has transfer taxes they will receive less than they sent by 2 x the transfer tax
    function claimRefund() public {
        require (cancelled, "TokenPresale: not cancelled, try calling cancel before claiming refund");
        uint256 refundAmount = spent[msg.sender];
        if(refundAmount > 0)
        _msgSender().transfer(refundAmount);

        emit refundClaimed(msg.sender, refundAmount);
    }

    function switchToPublicPresale(bool) external onlyOwnerOrOperator{
        require(hardCap > totalRaised, "Error: Can't change whitelisted presale to public after successful presale!");
        require(isWhiteListEnabled == true, "Error: Can't change public presale to whitelisted presale!");
        isWhiteListEnabled= false;
    }

    function isHardCapReached() public view returns (bool) {
        return hardCap <= totalRaised;
    }

    function isSoftCapReached() public view returns (bool) {
        return softCap <= totalRaised;
    }

    function addToWhitelist(address[] memory _address) external onlyOwnerOrOperator{
        for (uint256 i = 0; i < _address.length; i++) {
            if (!isWhiteListed[_address[i]]) {
                isWhiteListed[_address[i]] = true;
                emit AddedToWhiteList(_address[i]);
            }
        }
    }

    function removeFromWhitelist(address _address) external onlyOwnerOrOperator{
        require(isWhiteListed[_address],"Error : address is not whitelisted");
        isWhiteListed[_address] = false;
        emit RemovedFromWhiteList(_address);
    }

    function isSwapStarted () public view returns (bool) {
        return startTime <= block.timestamp;
    }

    function editPresaleTiming(uint256 newStartTime, uint256 newEndTime) external onlyOwnerOrOperator {
        require(startTime > block.timestamp, "Error: Can't modify an already live presale!");
        startTime = newStartTime;
        endTime = newEndTime;
    }

    function extendPresale(uint256 newEndTime) external onlyOwnerOrOperator {
        require(newEndTime >= startTime, "Error: End time has to bre greater than the start time!");
        endTime = newEndTime;
    }

    function finalize (bool _canClaim) external onlyOwnerOrOperator {
        require(softCap <= totalRaised, "Error: Can't finalize before Soft Cap is met!");
        canClaim = _canClaim;
        swapStatus = false;
    }

    function changeSwapRate (uint256 newRate) external onlyOwner {
        require(startTime > block.timestamp, "Error: Can't modify swap rate after presale has begun!");
        swapRate = newRate;
    }

    function setMinBuy (uint newMin) external onlyOwnerOrOperator {
        require(startTime > block.timestamp, "Error: Can't modify swap rate after presale has begun!");
        minBuy = newMin;
    }
    
    function setMaxBuy (uint256 newMax) external onlyOwnerOrOperator {
        require(startTime > block.timestamp, "Error: Can't modify swap rate after presale has begun!");
        maxBuy = newMax;
    }
    
    function transferPayee (address newPayee) external onlyOwner {
        require (newPayee != address(0), "Error: Can't set payee to zero address");
        emit PayeeTransferred (payee, newPayee);
        payee = newPayee;
    }

   function transferBNB() external onlyOwner {
        payable(payee).sendValue (address(this).balance);
    }

    function withdrawOtherTokens(address _token, uint256 amount) external onlyOwnerOrOperator {
        IERC20(_token).transfer (msg.sender, amount);
    }

    function numTokensToAddToLP() public view returns(uint256) {
        return launchRate * (hardCap * percentFundsToAddToLP /100);
    }
}
// File: Context.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
// File: IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

interface IERC20 {

    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Returns the decimals of tokens
     */
    function decimals() external view returns (uint8);

    /**
     * @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: Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "./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.
 */
contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view 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 {
        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 virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}