// File: contracts/TokensLocker.sol


pragma solidity ^0.8.0;

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);
}

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/**
* @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;
}
}

// OpenZeppelin Contracts v4.4.1 (access/Ownable.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);
}
}

contract TokensLocker is Context, Ownable {

address public tokenContract = 0xB1D3e4346616Ba13f5d21fa07588f3bdF18abf47;
address public presaleWallet = 0x70b0ba11D020408d651FcA0156BA16370fF3e93C;
address public presaleContract;

//@dev Users locked tokens infos
address[] public wallets;
mapping(address => uint256) public tokensAmount;
mapping(address => uint256) public timeLocked;
mapping(address => uint256) public unlockDate;

event walletAdded(address wallet, uint256 tokensAmount, uint256 unlockDate);
event claimedTokens(address tokenContract, address to, uint256 amount);
event getRefundedTokens(address tokenContract, address to, uint256 amount);

//@dev Called by presaleContract with tokensAmount transfered into tokens locker
function addWallet(address wallet, uint256 amount, uint256 _timeLocked) external {
require(msg.sender == owner() || msg.sender == presaleWallet || msg.sender == presaleContract, "Not the owner or presale actor");
wallets.push(wallet);
tokensAmount[wallet] = tokensAmount[wallet] amount;

//@dev Add new time lock to remaining time if already locked
if (unlockDate[wallet] >= block.timestamp) {
uint256 remainingTime = unlockDate[wallet] - block.timestamp;
timeLocked[wallet] = remainingTime _timeLocked;
unlockDate[wallet] = unlockDate[wallet] timeLocked[wallet];
}
else {
unlockDate[wallet] = block.timestamp _timeLocked;
timeLocked[wallet] = _timeLocked;
}
}

//@dev Reset Locked Wallet in case of refund (primos only)
function resetWalletForRefund(address wallet) external onlyOwner {
IBEP20 token = IBEP20(tokenContract);
token.transfer(presaleWallet, tokensAmount[wallet]);
emit getRefundedTokens(tokenContract, presaleWallet, tokensAmount[wallet]);
tokensAmount[wallet] = 0;
timeLocked[wallet] = 0;
unlockDate[wallet] = 0;
}

//@dev Claim locked tokens
function claimTokens(address wallet) public {
require(block.timestamp >= unlockDate[wallet], "You can't release your tokens yet !");
require(msg.sender == wallet || msg.sender == owner() || msg.sender == presaleWallet, "You have no locked tokens !");

IBEP20 token = IBEP20(tokenContract);
token.transfer(wallet, tokensAmount[wallet]);
emit claimedTokens(tokenContract, wallet, tokensAmount[wallet]);
tokensAmount[wallet] = 0;
timeLocked[wallet] = 0;
unlockDate[wallet] = 0;
}

//@dev Get infos about tokens locked linked to wallet
function infos(address wallet) public view returns(address, uint256, uint256, uint256) {
return (wallet, tokensAmount[wallet], timeLocked[wallet], unlockDate[wallet]);
}

function setPresaleWallet(address wallet) external onlyOwner {
presaleWallet = wallet;
}

function setPresaleContract(address _presaleContract) external onlyOwner {
presaleContract = _presaleContract;
}

function setTokenContract(address _tokenContract) external onlyOwner {
tokenContract = _tokenContract;
}
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol

// OpenZeppelin Contracts v4.4.1 (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.

/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a b;
if (c < a) return (false, 0);
return (true, c);
}
}

/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}

/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}

/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}

/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}

/**
* @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) {
return a b;
}

/**
* @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 a - b;
}

/**
* @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) {
return a * b;
}

/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}

/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}

/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}

/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}

/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}

// File: @openzeppelin/contracts/utils/Address.sol

// OpenZeppelin Contracts (last updated v4.5.0) (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: contracts/wPresale.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;



interface IToken {
function transfer(address to, uint256 tokens) external returns (bool success);
function balanceOf(address tokenOwner) external view returns (uint256 balance);
}

contract wPresale is Ownable {
using SafeMath for uint256;

//@dev BEP20 token infos
address public tokenAddress = 0xB1D3e4346616Ba13f5d21fa07588f3bdF18abf47;
uint256 public tokenDecimals = 9;
uint256 public tokensPerBNB = 357142857;
uint256 public tokensPerBNBDecimals = 2;

//@dev Presale infos & parameters
bool public isPresaleOpen = true;
mapping(address => uint256) public userInvests;
uint256 public minBNBLimit = 150000000000000000;
uint256 public maxBNBLimit = 700000000000000000000;
address public recipient = 0x70b0ba11D020408d651FcA0156BA16370fF3e93C;
uint256 public tokensSold = 0;
uint256 public totalBNBAmount = 0;

address deadWallet = 0x000000000000000000000000000000000000dEaD;

//@dev Tokens locker parameters
address public tokensLockerAddress;
uint256[] public investRange = [25, 63, 125, 250];
uint256[] public lockupTime = [90, 180, 270, 360];

//@dev Whitelist parameters
mapping(address => bool) public whitelisted;
bool public isOnlyWhitelisted = true;


//@dev BEP20 token funtions
function setTokenAddress(address token) external onlyOwner {
require(token != address(0), "Token address must be different than 0");
tokenAddress = token;
}

function setTokenDecimals(uint256 decimals) external onlyOwner {
tokenDecimals = decimals;
}


//@dev Tokens locker functions
function setInvestRange(uint256[] memory _investRange) external onlyOwner {
investRange = _investRange;
}

function setLockupTime(uint256[] memory _lockupTime) external onlyOwner {
lockupTime = _lockupTime;
}

function setTokensLockerAddress(address _tokensLockerAddress) external onlyOwner {
require(_tokensLockerAddress != address(0), "Tokens Locker address must be different than 0");
tokensLockerAddress = _tokensLockerAddress;
}

function addWalletToTokenLocker(address _userAddress, uint256 tokenAmount, uint256 duration) private {
TokensLocker ITokensLocker = TokensLocker(tokensLockerAddress);
ITokensLocker.addWallet(_userAddress, tokenAmount, duration);
require(IToken(tokenAddress).transfer(tokensLockerAddress, tokenAmount), "Not enough tokens in presale contract!");
}

function getLockupTime(uint256 amount) public view returns (uint256 range) {
uint256 duration = 0;

if(amount <= investRange[0]*10**18){
duration = 0;
}
else if(amount <= investRange[1]*10**18){
duration = lockupTime[0] * 1 days;
}
else if(amount <= investRange[2]*10**18){
duration = lockupTime[1] * 1 days;
}
else if(amount <= investRange[3]*10**18){
duration = lockupTime[2] * 1 days;
}
else {
duration = lockupTime[3] * 1 days;
}
return duration;
}

//@dev Whitelist functions
function setWhitelistStatus(bool status) external onlyOwner {
isOnlyWhitelisted = status;
}

function addToWhitelist(address _beneficiary) external onlyOwner {
whitelisted[_beneficiary] = true;
}

function addManyToWhitelist(address[] memory _beneficiaries) external onlyOwner {
for (uint256 i = 0; i < _beneficiaries.length; i ) {
whitelisted[_beneficiaries[i]] = true;
}
}

function removeFromWhitelist(address _beneficiary) external onlyOwner {
whitelisted[_beneficiary] = false;
}


//@dev Presale functions
function openPresale() external onlyOwner {
require(!isPresaleOpen, "Presale is open");
isPresaleOpen = true;
}

function closePresale() external onlyOwner {
require(isPresaleOpen, "Presale is not opened yet");
isPresaleOpen = false;
}

function setRecipient(address _recipient) external onlyOwner {
recipient = _recipient;
}

function setMinBNBLimit(uint256 amount) external onlyOwner {
minBNBLimit = amount.div(100);
}

function setMaxBNBLimit(uint256 amount) external onlyOwner {
maxBNBLimit = amount;
}

function setTokensPerBNB(uint256 _tokensPerBNB) external onlyOwner {
tokensPerBNB = _tokensPerBNB;
}

function setTokensPerBNBDecimals(uint256 decimals) external onlyOwner {
tokensPerBNBDecimals = decimals;
}

function getTokensPerBNB(uint256 amount) internal view returns (uint256) {
return amount.mul(tokensPerBNB).div(10**(uint256(18).sub(tokenDecimals).add(tokensPerBNBDecimals)));
}

receive() external payable {
buyToken();
}

function buyToken() public payable {

require(isPresaleOpen, "Presale is not open");

//@dev Check 24h early whitelist
if (isOnlyWhitelisted) {
require(whitelisted[msg.sender], "You are not whitelisted !");
}

//@dev Check users investments
require(userInvests[msg.sender].add(msg.value) <= maxBNBLimit && userInvests[msg.sender].add(msg.value) >= minBNBLimit, "Investment too high or too low");

//@dev Get tokens amount per BNB
uint256 tokenAmount = getTokensPerBNB(msg.value);

//@dev Check lockup time and transfer or lock tokens
uint256 lockupDuration = getLockupTime(msg.value);
if (lockupDuration == 0) {
require(IToken(tokenAddress).transfer(msg.sender, tokenAmount), "Not enough tokens in presale contract");
} else {
addWalletToTokenLocker(_msgSender(), tokenAmount, lockupDuration);
}

//@dev Infos update
tokensSold = tokenAmount;
totalBNBAmount = totalBNBAmount msg.value;
userInvests[msg.sender] = userInvests[msg.sender].add(msg.value);

//@dev Transfer BNB to recipient
payable(recipient).transfer(msg.value);
}

function burnUnsoldTokens() external onlyOwner {
require(!isPresaleOpen, "Burn tokens is forbidden until the presale is closed");
IToken(tokenAddress).transfer(deadWallet, IToken(tokenAddress).balanceOf(address(this)));
}

function getUnsoldTokens(address to) external onlyOwner {
require(!isPresaleOpen, "Get unsold tokens is forbidden until the presale is closed");
IToken(tokenAddress).transfer(to, IToken(tokenAddress).balanceOf(address(this)));
}
}