LAAPresale

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.24;

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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 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"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transfer.selector, to, value)
        );
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
        );
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */

    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, value)
        );
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(
            value
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(
            data,
            "SafeERC20: low-level call failed"
        );
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(
                abi.decode(returndata, (bool)),
                "SafeERC20: ERC20 operation did not succeed"
            );
        }
    }
}

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;
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(address recipient, uint256 amount)
        external
        returns (bool);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

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

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        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;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

contract Ownable is Context {
    address private _owner;

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

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// BNB LIVE PRICE

interface AggregatorV3Interface {
    function decimals() external view returns (uint8);

    function description() external view returns (string memory);

    function version() external view returns (uint256);

    function getRoundData(uint80 _roundId)
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );

    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        );
}

contract LAAPresale is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    AggregatorV3Interface public priceFeedBNB;
    address public feeReceiver;

    IERC20 public USDT;
    IERC20 public USDC;
    IERC20 public token;

    uint256 public TokenPricePerUsdt;
    address public Nulladdress = 0x0000000000000000000000000000000000000000;
    uint256 public ReferralFee = 5;

    uint256 public TokenSold;
    uint256 public maxTokeninPresale;

    mapping(address => bool) public isBlacklist;

    bool public presaleStatus;
    bool public CanClaim;

    mapping(address => uint256) public Claimable;
    event Recovered(address token, uint256 amount);

    constructor(
        IERC20 _USDT,
        IERC20 _USDC,
        IERC20 _token,
        address _feeRec
    ) {
        TokenPricePerUsdt = 12e18;
        maxTokeninPresale = 1000000000000 * (1E18);

        priceFeedBNB = AggregatorV3Interface(
            0x0567F2323251f0Aab15c8dFb1967E4e8A7D42aeE //bnb mainnet aggregator
        );

        USDT = _USDT;
        USDC = _USDC;
        token = _token;
        feeReceiver = _feeRec;
    }

    receive() external payable {
        // React to receiving bnb
    }

    // to get real time price of BNB
    function getLatestPriceBNB() public view returns (uint256) {
        (, int256 price, , , ) = priceFeedBNB.latestRoundData();
        return uint256(price);
    }

    function BuyWithBNB(address payable _refferal) external payable {
        require(
            TokenSold.add(BNBToToken(msg.value)) <= maxTokeninPresale,
            "Hardcap Reached!"
        );
        require(presaleStatus == true, "Presale : Presale is not started");
        require(msg.value > 0, "Presale : Unsuitable Amount");
        require(
            isBlacklist[msg.sender] == false,
            "Presale : you are blacklisted"
        );
        require(tx.origin == msg.sender, "Presale : caller is a contract");

        uint256 PerReferral = (msg.value * ReferralFee) / 100;
        uint256 remaining_amt = msg.value - PerReferral;

        if (_refferal == Nulladdress) {
            payable(feeReceiver).transfer(msg.value);
        } else {
            payable(_refferal).transfer(PerReferral);
            payable(feeReceiver).transfer(remaining_amt);
        }

        uint256 tokensToTransfer = BNBToToken(msg.value);

        Claimable[msg.sender] += tokensToTransfer;
        TokenSold = TokenSold.add(BNBToToken(msg.value));
    }

    function BuyWithUSDT(uint256 _amt, address _refferal) external {
        require(
            TokenSold.add(getValuePerUsdt(_amt)) <= maxTokeninPresale,
            "Hardcap Reached!"
        );
        require(presaleStatus == true, "Presale : Presale is not started");
        require(_amt > 0, "Presale : Unsuitable Amount");
        require(
            isBlacklist[msg.sender] == false,
            "Presale : you are blacklisted"
        );
        require(tx.origin == msg.sender, "Presale : caller is a contract");
        IERC20(USDT).safeTransferFrom(msg.sender, address(this), _amt);

        uint256 PerReferral = (_amt * ReferralFee) / 100;
        uint256 remaining_amt = _amt - PerReferral;

        if (_refferal == Nulladdress) {
            IERC20(USDT).safeTransfer(feeReceiver, _amt);
        } else {
            IERC20(USDT).safeTransfer(_refferal, PerReferral);
            IERC20(USDT).safeTransfer(feeReceiver, remaining_amt);
        }

        // Directly transfer tokens to the user's wallet
        uint256 tokensToTransfer = getValuePerUsdt(_amt);
        Claimable[msg.sender] += tokensToTransfer;

        TokenSold = TokenSold.add(getValuePerUsdt(_amt));
    }

    function BuyWithUSDC(uint256 _amt, address _refferal) external {
        require(
            TokenSold.add(getValuePerUsdt(_amt)) <= maxTokeninPresale,
            "Hardcap Reached!"
        );
        require(presaleStatus == true, "Presale : Presale is not started");
        require(_amt > 0, "Presale : Unsuitable Amount");
        require(
            isBlacklist[msg.sender] == false,
            "Presale : you are blacklisted"
        );
        require(tx.origin == msg.sender, "Presale : caller is a contract");
        IERC20(USDC).safeTransferFrom(msg.sender, address(this), _amt);

        uint256 PerReferral = (_amt * ReferralFee) / 100;
        uint256 remaining_amt = _amt - PerReferral;

        if (_refferal == Nulladdress) {
            IERC20(USDC).safeTransfer(feeReceiver, _amt);
        } else {
            IERC20(USDC).safeTransfer(_refferal, PerReferral);
            IERC20(USDC).safeTransfer(feeReceiver, remaining_amt);
        }

        uint256 tokensToTransfer = getValuePerUsdt(_amt);
        Claimable[msg.sender] += tokensToTransfer;

        TokenSold = TokenSold.add(getValuePerUsdt(_amt));
    }

    function claim() external {
        require(CanClaim == true, "Claim is not open yet");
        require(
            isBlacklist[msg.sender] == false,
            "Presale : you are blacklisted"
        );
        require(tx.origin == msg.sender, "Presale : caller is a contract");
        uint256 claimable = Claimable[msg.sender];
        require(claimable > 0, "no claimable found");
        token.transfer(msg.sender, claimable);
        Claimable[msg.sender] = 0;
    }

    function getValuePerUsdt(uint256 _amt) public view returns (uint256) {
        return (TokenPricePerUsdt.mul(_amt)).div(1e18);
    }

    function setRewardPricePerUsdt(uint256 _count) external onlyOwner {
        TokenPricePerUsdt = _count;
    }

    function stopPresale() external onlyOwner {
        presaleStatus = false;
    }

    function StartClaim() external onlyOwner {
        CanClaim = true;
    }

    function StopClaim() external onlyOwner {
        CanClaim = false;
    }

    function resumePresale() external onlyOwner {
        presaleStatus = true;
    }

    function setmaxTokeninPresale(uint256 _value) external onlyOwner {
        maxTokeninPresale = _value;
    }

    function setaggregatorv3(address _priceFeedBNB) external onlyOwner {
        priceFeedBNB = AggregatorV3Interface(_priceFeedBNB);
    }

    function updateTokenSold(uint256 _newTokenSold) external onlyOwner {
        require(
            _newTokenSold <= maxTokeninPresale,
            "Presale: New TokenSold exceeds maxTokeninPresale"
        );
        TokenSold = _newTokenSold;
    }

    function contractbalance() public view returns (uint256) {
        return address(this).balance;
    }

    function recoverBEP20(address tokenAddress, uint256 tokenAmount)
        external
        onlyOwner
    {
        IERC20(tokenAddress).transfer(this.owner(), tokenAmount);
        emit Recovered(tokenAddress, tokenAmount);
    }

    function EmergencyUSDT(address _usdt, uint256 tokenAmount)
        external
        onlyOwner
    {
        IERC20(_usdt).safeTransfer(this.owner(), tokenAmount);

        emit Recovered(address(_usdt), tokenAmount);
    }

    function settoken(IERC20 _token) external onlyOwner {
        token = _token;
    }

    function setUSDT(IERC20 _usdt) external onlyOwner {
        USDT = _usdt;
    }

    function setUSDC(IERC20 _USDC) external onlyOwner {
        USDC = _USDC;
    }

    function setBlacklist(address _addr, bool _state) external onlyOwner {
        isBlacklist[_addr] = _state;
    }

    function releaseFunds() external onlyOwner {
        payable(msg.sender).transfer(address(this).balance);
    }

    // New added
    function BNBToToken(uint256 _amount) public view returns (uint256) {
        uint256 BNBToUSD = (_amount * (getLatestPriceBNB())) / (1 ether);
        uint256 numberOfTokens = (BNBToUSD * (TokenPricePerUsdt)) / (1e8);
        return numberOfTokens;
    }

    function changefeeReceiver(address newFeeReceiver) external onlyOwner {
        feeReceiver = newFeeReceiver;
    }
}